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                                                   Emergency
                                                   management
                                                   of infants
                                                   THE MANAGEMENT OF
 Objectives
                                                   HYPOTHERMIA
 When you have completed this unit you
 should be able to:                                4-3 How do you measure an infant’s
 • Manage hypothermia.                             temperature?
 • Manage hypoglycaemia.
 • Manage respiratory distress.                    An infant’s skin temperature, rather than its
 • Use oxygen correctly.                           oral or rectal temperature, is usually used. The
 • Transfer an infant.                             axillary or abdominal skin temperature should
                                                   be measured.
4-1 What is the emergency management of            Skin temperature can be measured with either:
a newborn infant?
                                                   1. A low reading mercury thermometer.
Some newborn infants develop serious                  The thermometer is placed in the infant’s
problems which often cannot be managed in             axilla (armpit) for 2 minutes before the
a level 1 clinic or hospital where only primary       reading is taken. Thermometer should be
care is available. These infants need to be           stored dry when not in use to prevent cross
carefully assessed and stabilised before they         infection. Make sure it is a low reading
can be moved to a level 2 (special care unit)         thermometer.
or level 3 (intensive care unit) hospital that     2. A telethermometer. This is an electrical
has the staff and facilities to provide the care      thermometer. The probe is placed on
needed. Emergency management is the care              the skin over the left, lower abdomen or
that must be given to these infants in a level 1      the lower back. Avoid the right, upper
hospital or clinic before they are transferred.       abdomen as the liver produces a lot of heat
Staff working in level 1 hospitals and clinics        and this may give too high a reading.
must be able to give emergency care.
                                                   4-4 What is the normal range of body
                                                   temperature?
4-2 Which infants need emergency
management?                                        This depends on the site where the temperature
                                                   is measured:
1. Infants with hypothermia.
2. Infants with hypoglycaemia.                     1. The normal axillary temperature is 36.5–
3. Infants with respiratory distress.                 37 ºC.
62     PRIMAR Y NEWBORN CARE


2. The normal abdominal skin temperature is         3. Haemorrhage. When infants are very cold
   36–36.5 ºC.                                         their blood does not clot normally and
                                                       they commonly bleed.
4-5 What is hypothermia?
Hypothermia (low body temperature) is defined        Hypothermic infants may die of hypoglycaemia.
as an axillary temperature below 36.5 ºC or an
abdominal skin temperature below 36 ºC.
                                                    4-9 How do you treat hypothermia?
4-6 Which infants are at high risk of               1. Warm the infant in a closed incubator,
hypothermia?                                           overhead radiant warmer or warm room.
1.   Infants who are not dried well after birth        The incubator temperature should be set
2.   Infants in a cold room or cool incubator          at 37 ºC until the skin temperature returns
3.   Low birth weight infants                          to normal. If these are not available, place
4.   Infants lying near cold windows                   the infant naked against the mother’s skin
5.   Infants who are not fed                           and wrap both in a blanket to give skin-
                                                       to-skin care.
                                                    2. Provide energy while the infant is being
4-7 How do you recognise an infant with
                                                       warmed. Hypoglycaemia may occur
hypothermia?
                                                       during warming. Energy can be given as
Hypothermic infants present with the                   oral or nasogastric milk, or intravenous
following signs:                                       maintenance fluid containing 10% dextrose
                                                       water (e.g. Neonatalyte).
1. They are cold to the touch.
                                                    3. Provide oxygen. Give 30% oxygen by
2. They are lethargic, hypotonic, feed poorly
                                                       headbox while the infant is being warmed,
   and have a feeble cry.
                                                       even if the infant is pink.
3. Their hands and feet are usually pale or
                                                    4. Notify the referral level 1 or 2 unit as this
   blue, but their tongue and cheeks are often
                                                       infant may need to be transported. Discuss
   pink. The pink cheeks may incorrectly
                                                       the management of the infant with the staff
   suggest that the infant is well.
                                                       of the referral hospital.
4. Peripheral oedema or sclerema (a woody
                                                    5. Observations. Monitor and record the
   or plastic feel to the skin).
                                                       infant’s temperature, pulse, respiration, skin
5. Shallow, slow respiration or signs of
                                                       colour and blood glucose concentration
   respiratory distress.
                                                       until they are normal and stable.
6. Bleeding from the mouth, nose or needle
                                                    6. Keep the infant warm once a normal body
   punctures.
                                                       temperature is reached. It is very important
                                                       to keep the infant warm during transport.
4-8 What problems are common in
hypothermic infants?
                                                    4-10 How should you keep an infant warm
1. Hypoglycaemia. This is a common cause            during transport?
   of death in cold infants and the most
                                                    Infants should be kept warm during transport
   important complication of hypothermia.
                                                    by nursing them in a transport incubator or
   Cold infants use a lot of energy in an
                                                    keeping them warm by skin-to-skin care. If
   attempt to warm themselves. As a result
                                                    the mother cannot be moved, a nurse, doctor
   they use up all their energy stores, resulting
                                                    or ambulance attendant can give skin-to-skin
   in hypoglycaemia.
                                                    care. Warm infants can also be dressed and
2. Hypoxia. The infant’s haemoglobin does
                                                    then wrapped in a silver swaddler or tin foil.
   not carry oxygen normally when the red
                                                    The infant must be warm before transport.
   blood cells are very cold.
EMERGENC Y MANAGEMENT OF INFANTS          63


THE MANAGEMENT OF                                  signs. Severe hypoglycaemia is defined as a
                                                   blood glucose concentration of less than 1.5
HYPOGLYCAEMIA                                      mmol/l or hypoglycaemia with abnormal
                                                   neurological signs.
4-11 What is glucose?
                                                    Hypoglycaemia is defined as a blood glucose
Glucose is an important type of sugar. Many
                                                    concentration below 2.0 mmol/l.
forms of food (e.g. milk formula) contain
glucose. Infants also get glucose from lactose
in breast milk and from the breakdown of
                                                   4-15 What are the dangers of
starch when solids are added to the diet.
                                                   hypoglycaemia?
Glucose is an essential source of energy to
many cells of the body, especially the brain.      Hypoglycaemia is extremely dangerous,
Glucose is stored as glycogen in the liver.        especially when the blood glucose
Glucose can also be stored as fat and protein.     concentration is below 1.5 mmol/l and the
The liver can change stores of glycogen, fat and   infant has abnormal neurological signs. When
protein back into glucose.                         the blood glucose concentration is low the
                                                   cells of the body, particularly the brain, do not
The amount of glucose available to the cells can
                                                   receive enough glucose and as a result cannot
be assessed by measuring the concentration of
                                                   produce energy for their metabolism. With
glucose in the blood.
                                                   severe hypoglycaemia the brain cells can be
                                                   damaged or die, causing cerebral palsy, mental
4-12 How is blood glucose measured in the          retardation or death. Mild hypoglycaemia is
nursery?                                           important as it may rapidly progress to severe
The quickest, cheapest and easiest method to       hypoglycaemia. Every effort must , therefore,
measure the blood glucose concentration in         be made to treat mild hypoglycaemia
the nursery is to use a reagent strip such as      promptly.
Haemoglukotest, Glucotrend or Dextrostix.
However, a far more accurate method to screen       Hypoglycaemia may cause brain damage.
for hypoglycaemia is to read the colour of
the reagent strip with a glucose meter such as
reading Haemoglukotest strips with a Reflolux      4-16 Which infants are at risk of developing
meter. It is important to carefully read the       hypoglycaemia?
instructions which are packed with the reagent     Infants that have reduced energy stores,
strips as the correct method must be used.         reduced energy intake (feed poorly) or
                                                   increased energy needs are at risk of
4-13 What is the normal concentration of           hypoglycaemia.
glucose in the blood?
The normal concentration of glucose in the          Hypothermia causes hypoglycaemia.
blood of newborn infants is 2.0 mmol/l to
7.0 mmol/l.
                                                   4-17 What are the clinical signs of
4-14 What is hypoglycaemia?                        hypoglycaemia?
Hypoglycaemia is defined as a blood glucose        Hypoglycaemia may produce no clinical signs
concentration below 2.0 mmol/l. Mild               or present with only non-specific signs. This
hypoglycaemia is defined as a blood glucose        makes the clinical diagnosis of hypoglycaemia
concentration between 1.5 to 2.0 mmol/l in         very difficult. When present, the clinical signs
an infant without any abnormal neurological        of hypoglycaemia are:
64   PRIMAR Y NEWBORN CARE


1. The infant may be lethargic and hypotonic,      4. Whenever possible, milk feeds should be
   feed poorly, have a weak cry, apnoea,              given. Both clear feeds and dextrose feeds
   cyanosis or an absent Moro reflex.                 should not be used in newborn infants as
2. The infant may be jittery with a high              they are low in energy and may result in
   pitched cry, a fixed stare and fisting, have       hypoglycaemia.
   abnormal eye movements or convulsions.          5. If milk feeds cannot be given, then an
3. Excessive sweating. This sign may not be           intravenous infusion of 10% glucose (e.g.
   present, however, especially in preterm            Neonatalyte) should be started.
   infants.                                        6. Prevent hypothermia.
Often an infant has both signs of decreased        With a policy of breast feeding as soon
brain function, such as lethargy and poor          as possible after delivery, most cases of
feeding, as well as signs of excessive brain       hypoglycaemia can be prevented.
function, such as jitteriness and convulsions.
The clinical presentation of hypoglycaemia
is very variable which makes the clinical
                                                    Early breast feeding can usually prevent
diagnosis of hypoglycaemia difficult.               hypoglycaemia.
Therefore, the diagnosis of hypoglycaemia can
be easily missed.
                                                   4-20 How should you treat an infant with
                                                   mild hypoglycaemia?
 Hypoglycaemic infants may have no abnormal
                                                   Infants with a blood glucose concentration
 clinical signs.                                   between 1.5 mmol/l and 2.0 mmol/l and
                                                   no clinical signs of hypoglycaemia usually
                                                   need milk feeds urgently to prevent severe
4-18 How can you diagnose
                                                   hypoglycaemia:
hypoglycaemia?
                                                   1. If they tolerate oral or nasogastric feeds,
As the clinical diagnosis is difficult and often
                                                      give 10 ml/kg breast milk or milk formula
missed, it is essential that all infants at risk
                                                      immediately. Do not give 5% or 10%
of hypoglycaemia, and infants with clinical
                                                      dextrose orally as the energy content is less
signs that may be caused by hypoglycaemia,
                                                      than that of breast milk or milk formula.
be screened with reagent strips. Whenever
                                                   2. Repeat the reagent strip reading 30 minutes
possible, use a glucose meter rather than
                                                      after the feed to determine whether the
reading the reagent strip by eye. Ideally a
                                                      blood glucose concentration has returned
diagnosis of hypoglycaemia made with reagent
                                                      to the normal range. If it is still in the
strips should be confirmed with a laboratory
                                                      mild hypoglycaemia range, repeat the feed
blood glucose measurement.
                                                      with an added 5 g sugar (1 teaspoon) per
                                                      30 ml milk and repeat the reagent strip
4-19 How can you prevent hypoglycaemia?               measurement after another 30 minutes.
Every effort must be taken to prevent              3. When the blood glucose concentration has
hypoglycaemia by:                                     returned to normal, continue with regular
                                                      milk feeds and continue to monitor with
1. Identifying all infants at high risk of            reagent strips hourly for 3 hours.
   developing hypoglycaemia.                       4. If the blood glucose concentration falls
2. Monitoring the blood glucose concentration         below 1.5 mmol/l then treat as for severe
   of these infants with reagent strips.              hypoglycaemia.
3. Feeding all infants as soon as possible after   5. If the infant is too small or too ill to
   delivery, especially low birth weight infants      tolerate milk feeds, start an intravenous
   and infants of diabetic women.                     infusion of 10% glucose (e.g. Neonatalyte)
                                                      and transfer to a level 2 or 3 hospital.
EMERGENC Y MANAGEMENT OF INFANTS          65

Most infants with mild hypoglycaemia respond         6. Keep the infant warm.
well to milk feeds and do not need to be             7. The infant now needs to be referred
transferred. Establish breast feeding as soon as        urgently to the referral hospital. It is very
possible to prevent hypoglycaemia recurring.            important that the infant’s blood glucose
                                                        remains normal during transport.
4-21 How should you treat an infant with
                                                     4-22 How frequently should you measure
severe hypoglycaemia?
                                                     the blood glucose concentration?
All infants with a blood glucose concentration
                                                     1. In most infants at high risk of
below 1.5 mmol/l, or hypoglycaemia
                                                        hypoglycaemia, the blood glucose
with abnormal clinical signs, have severe
                                                        concentration should be measured hourly
hypoglycaemia. This is a medical emergency
                                                        with reagent strips for the first 3 hours,
and must be treated immediately. The
                                                        then 3 hourly until 100 ml/kg/day milk
management of severe hypoglycaemia consists
                                                        feeds have been established which is
of the following steps:
                                                        usually in 24 to 48 hours.
1. The treatment of choice is to start an            2. Infants with mild hypoglycaemia should
   intravenous infusion of 10% glucose (e.g.            be monitored every 30 minutes until the
   Neonatalyte) at a drip rate calculated to            blood glucose concentration has returned
   give 100 ml/kg in the first 24 hours. Give a         to the normal range. Readings should then
   bolus of 2 ml/kg of the 10% glucose over 5           be made hourly for 3 hours to ensure that
   minutes at the start of the infusion.                the blood glucose concentration does not
2. If you cannot rapidly put up a peripheral            fall again. Thereafter, measure the blood
   intravenous line, insert an umbilical vein           glucose concentration 3 hourly until milk
   catheter.                                            feeds are established.
3. Repeat the reagent strip measurement              3. Infants with severe hypoglycaemia should
   after 15 minutes. If the blood glucose               have their blood glucose concentration
   concentration has not returned to normal,            measured every 15 minutes until it has
   dilute 5 ml of 50% dextrose with 5 ml of             increased above 1.5 mmol/l. Then measure
   the 10% dextrose infusion fluid to give a            the blood glucose concentration hourly
   30% glucose solution. Inject 5 ml of this            until the infant arrives at the referral unit.
   30% glucose solution over 5 minutes into
   the plastic bulb of the infusion set. It is not   4-23 What is the prognosis after
   advisable to inject 50% dextrose, as it is        hypoglycaemia?
   extremely hypertonic.
4. If the blood glucose concentration still has      The risk of brain damage depends on
   not returned to normal within a further 15        the severity, duration and number of
   minutes phone your referral hospital. They        hypoglycaemic attacks. The prognosis is worst
   may ask you to give 5 mg hydrocortisone           if the hypoglycaemia has produced clinical
   intravenously or glucagon 0.3 mg/kg               signs, especially convulsions.
   intramuscularly.
5. In an emergency, if you are unable to give
   intravenous dextrose, give the infant 10          MANAGEMENT OF
   ml/kg breast milk or formula (or sweetened        RESPIRATORY DISTRESS
   cow’s milk if neither is available) by mouth
   or via a nasogastric tube. You can add 5 g (a
   teaspoon) of sugar or 5 ml of 50% dextrose        4-24 What is respiratory distress?
   per 10 ml feed to increase the glucose
   concentration. Do not give pure 50%               Respiratory distress is a collection of clinical
   dextrose orally, as it will cause vomiting.       signs, which indicate that the infant has
66    PRIMAR Y NEWBORN CARE


difficulty breathing. The 4 most important            infant is unable to expand them again during
clinical signs of respiratory distress are:           inspiration. Collapsed alveoli, due to the lack
                                                      of surfactant, result in respiratory distress.
1. Tachypnoea. A respiratory (breathing) rate
                                                      This condition is known as hyaline membrane
   of 60 or more breaths per minute (normal
                                                      disease (HMD).
   respiratory rate is about 40).
2. Central cyanosis. A blue tongue in room
   air.                                                Hyaline membrane disease is caused by too little
3. Recession. The in-drawing of the ribs and           surfactant in immature lungs.
   sternum during inspiration (also called
   retraction).
4. Grunting. A snoring noise made in the              4-27 What is the shake test?
   throat during expiration.
                                                      The amount of surfactant in the fetal lung can
If an infant has central cyanosis plus 1 or more      be determined after birth by doing a shake test
of the above clinical signs, the infant is said to    on a sample of gastric aspirate obtained within
have respiratory distress.                            30 minutes after delivery. A positive shake test
                                                      indicates that adequate surfactant is present
4-25 What are the important causes of                 in the lungs of the newborn infant. A negative
respiratory distress?                                 test indicates inadequate surfactant and
                                                      strongly suggests that the infant has hyaline
Respiratory distress in newborn infants
                                                      membrane disease.
is usually caused by one of the following
conditions:                                           It is important to pass a nasogastric tube and
                                                      aspirate the stomach of all preterm infants
1.   Hyaline membrane disease
                                                      soon after birth. The sample should be sent
2.   Wet lung syndrome
                                                      in a syringe or test tube with the infant when
3.   Meconium aspiration
                                                      it is referred to a level 2 or 3 unit so that the
4.   Pneumonia
                                                      shake test can be done at the referral hospital.
Other less common causes of respiratory               The result is very useful in managing an infant
distress include hypothermia and anaemia.             with respiratory distress.
                                                      The gastric aspirate can also be used to help
 There are many different causes of respiratory       diagnose congenital pneumonia when pus
 distress.                                            cells and bacteria can often be seen under the
                                                      microscope.

4-26 What is hyaline membrane disease                 4-28 How do you diagnose hyaline
(HMD)?                                                membrane disease?
At term the fetal lungs are mature and ready to       1. The infant is preterm.
be filled with air after delivery. The alveoli (air   2. The infant develops respiratory distress at or
sacs) of these mature lungs secrete a substance          soon after delivery. The signs of respiratory
called surfactant that prevents them collapsing          distress gradually become worse.
at the end of expiration. This allows the             3. The infant usually moves very little and
infant to breathe air in and out with very little        commonly develops peripheral oedema.
physical effort.                                      4. The shake test on gastric aspirate is
                                                         negative indicating inadequate surfactant.
In contrast, many preterm infants have
immature lungs, which do not have adequate
amounts of surfactant at birth. As a result
the alveoli collapse with expiration and the
EMERGENC Y MANAGEMENT OF INFANTS             67

4-29 What is the clinical course in hyaline          4. The shake test on the gastric aspirate
membrane disease?                                       is positive, which excludes hyaline
                                                        membrane disease.
The degree of respiratory distress gets worse
during the first 48 hours after birth and the
concentration of inspired oxygen, needed to           The wet lung syndrome is the commonest cause
keep the infant pink, increases for the first 2 to    of respiratory distress.
3 days (48 to 72 hours). During this time some
infants will die of hyaline membrane disease.
Otherwise the respiratory distress starts to         4-32 What is the clinical course of the wet
improve. As the respiratory distress can be          lung syndrome?
expected to get worse during the first few days,
                                                     The respiratory distress in infants with the wet
it is important the infant be transferred to a
                                                     lung syndrome gradually improves during the
level 2 or 3 unit as soon as possible.
                                                     first 24 hours and usually recovers by 72 hours.
                                                     Oxygen is needed for a few hours to 3 days
 Hyaline membrane disease gets worse before it       only. Usually less than 40% oxygen is required.
 gets better.                                        The clinical course of the wet lung syndrome,
                                                     therefore, is very different from that of hyaline
                                                     membrane disease.
4-30 What is the wet lung syndrome?
Before delivery the fetal lungs are not               The wet lung syndrome is important because it
collapsed but filled with lung fluid. At vaginal      can be confused with hyaline membrane disease.
delivery, most of this fluid is squeezed out of
the lungs as the chest is compressed in the
birth canal. After birth the remaining fluid         4-33 What is the meconium aspiration
is coughed up or is absorbed within a few            syndrome?
minutes. In some infants this rapid removal
                                                     If the fetus is hypoxic in utero it may become
of fetal lung fluid does not take place resulting
                                                     distressed, pass meconium, and make gasping
in the wet lung syndrome which presents
                                                     movements, which suck the meconium
after delivery as respiratory distress. The
                                                     stained liquor into the larynx and trachea. If
wet lung syndrome is the commonest cause
                                                     the airways are not well suctioned after the
of respiratory distress. It is also important
                                                     infant’s head is delivered, the meconium can
because during the first day of life it can easily
                                                     be inhaled into the smaller airways and alveoli
be confused with hyaline membrane disease.
                                                     with the onset of breathing. This results in the
The wet lung syndrome is usually seen in             meconium aspiration syndrome. Many cases
term infants, especially after fetal distress,       of severe meconium aspiration syndrome
maternal sedation, caesarean section and             can be prevented by carefully suctioning the
polyhydramnios. In these infants the normal          upper airways of meconium stained infants
clearance of lung fluid is often delayed             before they breathe at birth. The risk of the
for many hours resulting in the wet lung             meconium aspiration syndrome is particularly
syndrome.                                            high if the meconium is very thick.

4-31 How can you diagnose the wet lung
                                                      The airways of all meconium stained infants
syndrome?
                                                      should be well suctioned before delivering the
1. These infants are usually born at term.            shoulders.
2. They develop respiratory distress from
   delivery.
3. They have a typical clinical course.
68    PRIMAR Y NEWBORN CARE


4-34 How do you diagnose the meconium               1. Keep the infant warm, preferably in an
aspiration syndrome?                                    incubator.
                                                    2. Handle the infant as little as possible,
1. The infant is usually born at term or post
                                                        because stimulating the infant often
   term but only rarely preterm.
                                                        increases the oxygen requirements. There
2. The liquor is meconium stained.
                                                        is no need to routinely suction the airways.
3. Meconium may be suctioned from the
                                                    3. Provide energy, to prevent hypoglycaemia.
   mouth and upper airways at birth and the
                                                        Preferably give an infusion of 10%
   infant is usually meconium stained.
                                                        glucose (e.g. Neonatalyte). Milk feeds by
4. Respiratory distress is present and the
                                                        nasogastric tube can be given to infants
   chest usually appears hyperinflated (over
                                                        with mild respiratory distress.
   expanded).
                                                    4. Treat central cyanosis by giving oxygen.
                                                        Give oxygen therapy correctly.
4-35 What is the clinical course of the             5. Record the following important
meconium aspiration syndrome?                           observations every hour and note any
From birth the meconium stained infant has              deterioration:
respiratory distress which, in severe cases,            • respiratory rate
gets progressively worse and may kill the               • presence or absence of recession and
infant. Milder cases will gradually recover                 grunting
over days or weeks. Infants who survive severe          • presence or absence of cyanosis
meconium aspiration often have damaged                  • percentage of oxygen given
lungs that may take months to recover.                  • heart rate
                                                        • both the skin and incubator
4-36 What are the common causes of                          temperature
pneumonia?                                          6. Consult the staff of the nearest level 2 or
                                                        3 hospital, as the infant may need to be
An infant may be born with pneumonia                    transferred. This is particularly important
(congenital pneumonia) as a complication                in hyaline membrane disease where early
of chorioamnionitis. Other infants may                  transport is best. A chest X ray at the
develop pneumonia in the days or weeks after            referral hospital will help decide the cause
delivery, due to the spread of bacteria in a            of the respiratory distress.
nursery. Preterm infants are at an increased        7. If the infant develops recurrent apnoea, or
risk of pneumonia.                                      if oxygen fails to keep the infant pink, then
                                                        mask and bag ventilation should be started.
4-37 How can you diagnose pneumonia?                8. Parenteral antibiotics must be given
                                                        if pneumonia is diagnosed. Either
1. The infant develops signs of respiratory
                                                        ceftriaxone 50mg/kg daily by IM or IV
   distress and also appears clinically ill.
                                                        injection or a combination of daily benzyl
2. The diagnosis of congenital pneumonia
                                                        penicillin 50 000 units/kg/day IV plus
   complicating chorioamnionitis is suggested
                                                        gentamicin 7.5 mg/kg IM daily.
   by seeing pus cells and bacteria in a Gram
                                                    9. Unfortunately there is no specific
   stain of the gastric aspirate after delivery.
                                                        treatment for the infant with respiratory
                                                        distress caused by meconium aspiration.
4-38 How should you manage an infant                10. Transfer is not as urgent in infants with
with respiratory distress?                              wet lung syndrome as they usually improve
The principles of care are the same, irrespective       after the first few hours and rarely need
of the cause of the respiratory distress.               more than 40% oxygen.
Therefore, all infants with respiratory distress    11. Infants who do not need to be transferred
should receive the same general management:             should be nursed in an incubator and
                                                        given oxygen as required. Three hourly
EMERGENC Y MANAGEMENT OF INFANTS              69

   feeds by nasogastric tube, rather than an         4-41 How much oxygen is needed by the
   intravenous infusion, can usually be given        normal infant?
   to these infants.
                                                     The normal oxygen saturation in a newborn
                                                     infant is 86 to 92%. This indicates that the
                                                     infant is breathing the correct amount of
THE CORRECT USE OF                                   oxygen. If the saturation is less than 86% the
OXYGEN THERAPY                                       infant is not getting enough oxygen while a
                                                     saturation above 92% indicates that the infant
                                                     may be getting too much oxygen. A saturation
4-39 Why does the body need oxygen?                  monitor is very useful to assess whether a
                                                     newborn infant with respiratory distress is
Oxygen is needed by all the cells of the body.
                                                     getting the correct amount of oxygen.
Without enough oxygen the cells, especially
of the brain, will be damaged or die. However,
too much oxygen is also dangerous and can             The normal saturation of oxygen in the blood is
damage cells. In the body, oxygen is carried          86 to 92%.
by red blood cells from the lungs to all the
other organs. When loaded with oxygen the
red blood cells are red in colour. With too little   4-42 When does an infant need extra
oxygen they are blue.                                oxygen?
                                                     An infant needs extra oxygen if it becomes
 Too little oxygen can cause brain damage.           centrally cyanosed or if the saturation of
                                                     oxygen falls below 86%.

4-40 How do you measure the amount of                4-43 Can you give too much oxygen?
oxygen in the blood?
                                                     Yes. If too much oxygen is given the oxygen
1. This can be roughly assessed clinically           saturation will rise above 92%. Preterm infants,
   as the infant appears peripherally and            especially infants below 34 weeks gestation, are
   centrally cyanosed if there is not enough         at risk of oxygen damage to the eyes (known
   oxygen in the red cells. This clinical            as retinopathy of prematurity) if excessive
   method may be inaccurate and should,              amounts of oxygen are given. The damage to
   whenever possible, be confirmed by                the retina is done by too much oxygen in the
   measuring the oxygen saturation.                  blood and not due to the direct effect on the
2. At the bedside the oxygen saturation can          infant’s eyes of oxygen in the headbox.
   be measured with a saturation monitor (i.e.
   pulse oximeter), which simply clips onto          At resuscitation it is probably safe to use
   the infant’s hand or foot and measures the        oxygen for a short period only until the infant
   oxygen saturation through the skin. The           is pink and breathing well.
   oxygen saturation is given as a percentage.
   It indicates the amount of oxygen being            Too much oxygen is dangerous as it may cause
   carried by the red cells.                          blindness.
3. In a laboratory the amount of oxygen in
   the blood can also be measured accurately
   in a sample of arterial blood.                    4-44 When should you give an infant extra
                                                     oxygen?
                                                     1. During resuscitation if the infant does not
                                                        respond rapidly to mask ventilation with
                                                        room air
70   PRIMAR Y NEWBORN CARE


2. When there is respiratory distress              The amount of oxygen being given in a
3. When the infant has central cyanosis            headbox can be measured with an oxygen
4. When the oxygen saturation is less than         monitor. The probe of the oxygen monitor is
   86%                                             placed in the headbox and the display on the
                                                   monitor box shows the amount of oxygen that
4-45 Which infants do not need extra               the infant is breathing.
oxygen?
                                                   4-48 How much oxygen should you give?
1. Infants with normal Apgar scores at birth
2. Infants with peripheral but not central         The percentage of oxygen given in the headbox
   cyanosis. If there is peripheral cyanosis       should be increased until:
   only, the cause is usually cold hands and
                                                   1. Central cyanosis is corrected (the tongue
   feet with poor perfusion, rather than
                                                      is pink).
   hypoxia.
                                                   2. The oxygen saturation is 86–92%.
3. Preterm infants with a normal oxygen
   saturations                                     The required percentage of oxygen given to
                                                   keep different infants pink may vary from 21
4-46 What methods can you use to                   to 100%. For example, an infant with severe
administer oxygen?                                 hyaline membrane disease may need 90%
                                                   oxygen while another infant with mild wet
1. Oxygen is most commonly given into a            lung syndrome may need only 25% to achieve a
   perspex head box. This is the best method       normal oxygen saturation. Do not confuse the
   of administering oxygen in a level 1 unit,      percentage of oxygen given in a headbox with
   as it is a simple, cheap and highly effective   the oxygen saturation in the infant’s blood.
   method.
2. At resuscitation oxygen is given via a mask
                                                   4-49 How can you control the amount of
   and bag.
                                                   oxygen given?
3. In a level 2 or 3 unit, oxygen is sometimes
   given via nasal prongs to infants with          As there are dangers in giving too much or
   respiratory distress syndrome. Other infants    too little oxygen, it is important to give oxygen
   may need to be intubated and ventilated.        correctly.
Oxygen should not be given directly into a         In a level 1 hospital or clinic, oxygen is usually
closed incubator as this method is wasteful,       given by headbox. Whenever possible, an
high concentrations cannot be reached and          air/oxygen blender should be used so that
the concentration of oxygen drops every time       the percentage of oxygen in the headbox can
an incubator port is opened. Giving 100%           be accurately controlled. If a blender is not
oxygen via a cardboard cup is extremely            available, a venturi can be used. The venturi
dangerous, especially if used for a long time,     is a plastic gauge, which controls the amount
as it is almost impossible to control the          of air and oxygen being mixed. Some venturis
percentage of oxygen accurately.                   mix pure oxygen with room air to give any
                                                   required percentage of oxygen while others
4-47 How can you measure the amount of             only give a fixed percentage.
extra oxygen given?                                Whenever possible, an oxygen monitor should
There is 21% oxygen in room air. Piped oxygen      be used to accurately measure the percentage
or oxygen from cylinders provides 100%.            of oxygen in the headbox. It is very dangerous
More and more oxygen can be added to room          to attempt to control the percentage of oxygen
air until 100% oxygen is reached. It is very       given into a head box by simply altering the
important to know how much extra oxygen            flow rate.
the infant is receiving.
EMERGENC Y MANAGEMENT OF INFANTS            71


 Always give headbox oxygen via a blender or           4-53 What is the aim of care during
                                                       transfer?
 venturi.
                                                       The aim is to keep the infant in the best
                                                       possible clinical condition while it is being
4-50 Should you humidify oxygen?                       moved from the clinic to the hospital. This is
                                                       achieved by providing the following:
Yes. Oxygen should always be humidified, as
oxygen from a cylinder is very dry. Dry oxygen         1.   A warm environment
irritates the airways. Usually it is not needed to     2.   An adequate supply of oxygen
warm oxygen if it is given by a headbox.               3.   A source of energy
                                                       4.   Careful observations
4-51 What flow rate of oxygen should you               This greatly increases the infant’s chance of
use?                                                   survival without brain damage.
When oxygen is given into a headbox, either
directly or via a blender or venturi, the flow         4-54 Which infants should be transferred to
should be 5 litres per minute. A high flow rate        a level 2 or 3 hospital?
wastes oxygen and cools the infant.
                                                       All infants that need management, which
                                                       cannot be provided at a level 1 hospital or
                                                       clinic, must be referred to the nearest level
TRANSFERRING A                                         2 hospital with a special care unit or a level
NEWBORN INFANT                                         3 hospital with an intensive care unit. The
                                                       following infants should be transferred:
                                                       1. Preterm infants, especially infants less than
4-52 Why should newborn infants be
                                                          36 weeks gestation
transferred?
                                                       2. Infants with a birth weight under 1800 g.
If pregnant women are correctly categorised               Most infants between 1800 g and 2500 g
into low risk and high risk groups during                 do not need to be referred and can be sent
pregnancy and labour, low risk infants can                home.
be delivered at level 1 hospitals and clinics          3. Infants with asphyxia that require
with the necessary staff and equipment to                 ventilation during resuscitation
care for them. However, when maternal                  4. Infants who need emergency management
categorisation is incorrect, when unexpected              for hypothermia, hypoglycaemia or
problems present during or after delivery, or             respiratory distress
when a mother with a complicated pregnancy             5. Infants with problems such as severe
or labour arrives in advanced labour at a level           infection, marked jaundice, trauma or
1 hospital or clinic, then the infant may need            bleeding
to be transferred to a hospital with a level 2         6. Infants with major congenital abnormalities,
or 3 unit.                                                especially if urgent surgery is needed
If possible, it is better for the infant to be         Any infant needing possible referral must
transferred before delivery than after birth. The      first be discussed with the staff at the referral
mother is the best incubator during transfer.          hospital. Each region should establish its own
                                                       referral criteria so that the staff knows which
                                                       infants need to be transferred.
 It is better to transfer the mother before delivery
 than to transfer the infant after birth.
                                                        Each region must draw up its own referral criteria.
72    PRIMAR Y NEWBORN CARE


4-55 Why should the infant be resuscitated            3. Hypoxia: It is essential that infants receive
and stabilized before being transreffed?                 oxygen during transfer if this is needed.
                                                         All the equipment required for the safe
It is very important that the infant is fully
                                                         administration of oxygen should be
resuscitated and stabilised before being
                                                         available. Infants who do not need extra
transferred. The infant must be warm, well
                                                         oxygen must not be given oxygen routinely
oxygenated and given a supply of energy
                                                         while being transferred. Some infants
before being moved. Transferring a collapsed
                                                         with respiratory distress or apnoea need
infant will often kill the infant. The clinic staff
                                                         ventilation during transfer.
and the transfer personnel should together
assess the infant and ensure that the infant is
in the best possible condition to be moved.           4-58 Who should transfer a sick infant?
                                                      Vehicles to transfer infants must be provided
4-56 How should the transfer be arranged?             by the local authority in each region. Ideally
                                                      an ambulance should be used. If possible,
If possible, the hospital staff that will
                                                      ambulance personnel should be trained to care
receive the infant should make the transfer
                                                      for infants during transfer. When this service
arrangements. The hospital staff can then
                                                      is not available, the referral hospital should
advise on management during transfer and be
                                                      provide nursing or medical staff to care for
ready to receive the infant in the nursery. The
                                                      the infant while it is being moved from the
unexpected arrival of an infant at the hospital
                                                      clinic to the hospital. A transport incubator,
must be avoided. The clinical notes and a
                                                      oxygen supply and emergency box of essential
referral letter must be sent with the infant.
                                                      resuscitation equipment should always be
A sample of gastric aspirate, collected soon
                                                      available at the referral hospital for use in
after delivery for microscopy and the shake
                                                      transferring newborn infants. Only as a last
test, is very helpful, especially in preterm
                                                      resort should the clinic provide a vehicle and
infants, infants with respiratory distress and
                                                      staff to transfer a sick infant to hospital.
infants with suspected congenital pneumonia.
Consent for surgery should also be sent if a
surgical problem is diagnosed.                        4-59 Should the mother also be transferred
                                                      to hospital?
4-57 What are the greatest dangers during             Yes, whenever possible, the mother should be
transfer?                                             transferred to hospital with her infant.
1. Hypothermia: Infants must be kept warm
   during transfer and their skin temperature
   should be regularly measured. A transport          CASE STUDY 1
   incubator is the best way to keep the body
   temperature normal. If an incubator is not         A 1500 g infant is brought to an outlying clinic
   available, hypothermia can be prevented            on a cold winters day. The mother delivered 30
   by using skin-to-skin care or by dressing          minutes before and has remained at home. The
   the infant and then wrapping the infant in         infant’s axillary temperature is 34.5 ºC but the
   a silver swaddler (space blanket) or heavy         infant appears active. The clinic does not have
   gauge tin foil.                                    an incubator.
2. Hypoglycaemia: Some supply of energy
   must be provided during transfer. Either           1. What error was made in the management
   milk feeds or intravenous fluids should be         of this infant?
   given. The blood glucose concentration
                                                      The infant should have been kept warm. Skin-
   should be regularly measured with
                                                      to-skin care is very effective in keeping an
   reagent strips.
EMERGENC Y MANAGEMENT OF INFANTS         73

infant warm after delivery. An infant should       3. Why does this term infant have a low
never be allowed to get cold after delivery.       blood glucose concentration?
                                                   Because the infant is cold. Hypothermic
2. How can you warm this infant in the             infants often become hypoglycaemic as they
clinic?                                            rapidly use up all their energy stores such as
You can use an incubator or a warm room to         glycogen and fat. In addition this infant is
correct the infant’s temperature. The staff can    wasted and, therefore, was born with reduced
also give skin-to-skin care themselves.            energy stores.

3. When should the infant be moved to              4. What are the clinical signs of
hospital?                                          hypoglycaemia?
If possible, it is best to warm the infant first   Often there are no clinical signs. Severe
before moving it to hospital.                      hypoglycaemia may cause neurological signs
                                                   such as lethargy, decreased tone, poor feeding,
4. How can the infant be kept warm in the          a weak cry, absent Moro, jitteriness and
ambulance?                                         convulsions.

If possible, a transport incubator should be       5. How would you treat this infant at the
used. If this is not available, use skin-to-skin   clinic?
care. Otherwise, the infant should be warmly
dressed and wrapped in a blanket. A thermal        Give the infant a feed of breast milk or
blanket (or aluminium foil) can also be used.      formula. If neither is available, sweetened
Remember that the infant must be warmed            cow’s milk may be used. The infant must also
before it is placed in a thermal blanket.          be warmed. The blood glucose concentration
                                                   should have returned to normal in 15 minutes.
                                                   If not, repeat the feed and arrange urgent
CASE STUDY 2                                       transport to the nearest hospital. If the infant
                                                   develops severe hypoglycaemia an infusion
                                                   10% dextrose (e.g. Neonatalyte) must be
A term infant is brought to a rural clinic after
                                                   started. It is very important to start treatment
having been born at home. The infant is cold
                                                   before referring the infant to hospital.
and wasted but otherwise appears well. A
Haemoglukotest reagent strip, read by naked
eye, gives a reading between 1.5 and 2 mmol/l.
                                                   CASE STUDY 3
1. What is your interpretation of the blood
glucose concentration?                             A male infant is born at 32 weeks gestation
                                                   in a level 1 hospital. Soon after delivery his
The infant has mild hypoglycaemia.                 respiratory rate is 80 breaths per minute with
                                                   recession and expiratory grunting. The infant’s
2. What is the danger of mild                      tongue is blue in room air. A gastric aspirate is
hypoglycaemia?                                     collected 10 minutes after delivery.
The infant is at high risk of developing severe
hypoglycaemia.                                     1. Which clinical signs indicate that the
                                                   infant has respiratory distress?
                                                   Tachypnoea, recession, grunting and central
                                                   cyanosis in room air.
74    PRIMAR Y NEWBORN CARE


2. What is the probable cause of the                CASE STUDY 4
respiratory distress?
The infant probably has hyaline membrane            A 3 day old, term infant has pneumonia in a
disease due to immature lungs. Hyaline              level 1 hospital and is nursed in an incubator.
membrane disease is common in infants born          The infant is cyanosed in room air and needs
preterm.                                            oxygen therapy.

3. What is the value of collecting a sample         1. What equipment should be used to
of gastric aspirate?                                administer the oxygen?
Diagnosing the cause of the respiratory             The best method to give this infant oxygen
distress is often helped if a sample of gastric     would be a perspex head box. Giving oxygen
aspirate is collected soon after delivery. The      directly into the incubator is unsatisfactory
diagnosis of hyaline membrane disease is            as it uses a lot of oxygen. In addition, high
supported by a negative shake test, which           concentrations of oxygen cannot be given and
indicates immature lungs. A Gram stain              the amount of oxygen in the incubator drops if
showing pus cells suggests that the infant has      a porthole is opened.
congenital pneumonia as a complication of
chorioamnionitis.                                   2. How should you measure the amount of
                                                    oxygen given?
4. Should this infant remain at the level 1
                                                    The concentration of oxygen in the head
hospital?
                                                    box should be measured with an oxygen
No, he should be moved as soon as possible to       monitor. The amount of oxygen given must
a level 2 or 3 hospital with staff and facilities   not be measured in litres per minute with a
to care for sick infants. Hyaline membrane          flow meter, as this is an extremely inaccurate
disease deteriorates for 2 to 3 days before         method of estimating the amount of oxygen
improving. Therefore, this infant should be         being given.
transferred as soon as possible.
                                                    3. How should you control the percentage
5. How would you manage this infant                 of oxygen given?
before transfer to a larger hospital?
                                                    With an oxygen-air blender or a venturi.
Keep the infant warm and give just enough
oxygen via a head box to keep the tongue            4. Why should the oxygen be humidified?
pink. If a saturation monitor is available,
keep the oxygen saturation between 86 and           Because unhumidified gas is very dry and
92%. Handle the infant as little as possible        will irritate the linings of the nose, throat and
after starting an intravenous infusion of 10%       airways.
dextrose (e.g. Neonatalyte). Carefully observe
his respiration rate and pattern, colour, heart     5. What flow rate of oxygen should be
rate and temperature. Ventilate with a bag and      given into the head box?
mask if the infant develops apnoea or remains       A flow rate of 5 litres per minute is best. This is
cyanosed in 100% oxygen.                            measured on the flow meter.

6. How should the amount of oxygen in the
infant’s blood be measured?
With a saturation monitor.
EMERGENC Y MANAGEMENT OF INFANTS         75


CASE STUDY 5                                       management. Only then should the infant
                                                   have been transferred.
A 1700 g infant is born in a rural clinic. The
clinic staff call for an ambulance to take the     2. What was wrong with the management
infant to the nearest hospital. The hospital is    of the infant at the clinic?
not contacted. The infant, which appears well,     The infant should have been fed before
is wrapped in a blanket and not given a feed.      referral. A transport incubator or silver
The note to the hospital reads ‘Please take over   swaddler should have been used to prevent
the management of this small infant’.              hypothermia on the way to hospital. Skin-to-
                                                   skin care could also have been used.
1. How should the transfer of this infant
have been arranged?                                3. Why was the referral note inadequate?
The clinic staff should have contacted the         The referral letter should give all the necessary
referral hospital and discussed the problem        details of the pregnancy, the delivery and the
with them. The hospital staff should               infant’s clinical condition.
have advised the clinic staff as to further

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Emergency management of hypothermia and hypoglycemia in infants

  • 1. 4 Emergency management of infants THE MANAGEMENT OF Objectives HYPOTHERMIA When you have completed this unit you should be able to: 4-3 How do you measure an infant’s • Manage hypothermia. temperature? • Manage hypoglycaemia. • Manage respiratory distress. An infant’s skin temperature, rather than its • Use oxygen correctly. oral or rectal temperature, is usually used. The • Transfer an infant. axillary or abdominal skin temperature should be measured. 4-1 What is the emergency management of Skin temperature can be measured with either: a newborn infant? 1. A low reading mercury thermometer. Some newborn infants develop serious The thermometer is placed in the infant’s problems which often cannot be managed in axilla (armpit) for 2 minutes before the a level 1 clinic or hospital where only primary reading is taken. Thermometer should be care is available. These infants need to be stored dry when not in use to prevent cross carefully assessed and stabilised before they infection. Make sure it is a low reading can be moved to a level 2 (special care unit) thermometer. or level 3 (intensive care unit) hospital that 2. A telethermometer. This is an electrical has the staff and facilities to provide the care thermometer. The probe is placed on needed. Emergency management is the care the skin over the left, lower abdomen or that must be given to these infants in a level 1 the lower back. Avoid the right, upper hospital or clinic before they are transferred. abdomen as the liver produces a lot of heat Staff working in level 1 hospitals and clinics and this may give too high a reading. must be able to give emergency care. 4-4 What is the normal range of body temperature? 4-2 Which infants need emergency management? This depends on the site where the temperature is measured: 1. Infants with hypothermia. 2. Infants with hypoglycaemia. 1. The normal axillary temperature is 36.5– 3. Infants with respiratory distress. 37 ºC.
  • 2. 62 PRIMAR Y NEWBORN CARE 2. The normal abdominal skin temperature is 3. Haemorrhage. When infants are very cold 36–36.5 ºC. their blood does not clot normally and they commonly bleed. 4-5 What is hypothermia? Hypothermia (low body temperature) is defined Hypothermic infants may die of hypoglycaemia. as an axillary temperature below 36.5 ºC or an abdominal skin temperature below 36 ºC. 4-9 How do you treat hypothermia? 4-6 Which infants are at high risk of 1. Warm the infant in a closed incubator, hypothermia? overhead radiant warmer or warm room. 1. Infants who are not dried well after birth The incubator temperature should be set 2. Infants in a cold room or cool incubator at 37 ºC until the skin temperature returns 3. Low birth weight infants to normal. If these are not available, place 4. Infants lying near cold windows the infant naked against the mother’s skin 5. Infants who are not fed and wrap both in a blanket to give skin- to-skin care. 2. Provide energy while the infant is being 4-7 How do you recognise an infant with warmed. Hypoglycaemia may occur hypothermia? during warming. Energy can be given as Hypothermic infants present with the oral or nasogastric milk, or intravenous following signs: maintenance fluid containing 10% dextrose water (e.g. Neonatalyte). 1. They are cold to the touch. 3. Provide oxygen. Give 30% oxygen by 2. They are lethargic, hypotonic, feed poorly headbox while the infant is being warmed, and have a feeble cry. even if the infant is pink. 3. Their hands and feet are usually pale or 4. Notify the referral level 1 or 2 unit as this blue, but their tongue and cheeks are often infant may need to be transported. Discuss pink. The pink cheeks may incorrectly the management of the infant with the staff suggest that the infant is well. of the referral hospital. 4. Peripheral oedema or sclerema (a woody 5. Observations. Monitor and record the or plastic feel to the skin). infant’s temperature, pulse, respiration, skin 5. Shallow, slow respiration or signs of colour and blood glucose concentration respiratory distress. until they are normal and stable. 6. Bleeding from the mouth, nose or needle 6. Keep the infant warm once a normal body punctures. temperature is reached. It is very important to keep the infant warm during transport. 4-8 What problems are common in hypothermic infants? 4-10 How should you keep an infant warm 1. Hypoglycaemia. This is a common cause during transport? of death in cold infants and the most Infants should be kept warm during transport important complication of hypothermia. by nursing them in a transport incubator or Cold infants use a lot of energy in an keeping them warm by skin-to-skin care. If attempt to warm themselves. As a result the mother cannot be moved, a nurse, doctor they use up all their energy stores, resulting or ambulance attendant can give skin-to-skin in hypoglycaemia. care. Warm infants can also be dressed and 2. Hypoxia. The infant’s haemoglobin does then wrapped in a silver swaddler or tin foil. not carry oxygen normally when the red The infant must be warm before transport. blood cells are very cold.
  • 3. EMERGENC Y MANAGEMENT OF INFANTS 63 THE MANAGEMENT OF signs. Severe hypoglycaemia is defined as a blood glucose concentration of less than 1.5 HYPOGLYCAEMIA mmol/l or hypoglycaemia with abnormal neurological signs. 4-11 What is glucose? Hypoglycaemia is defined as a blood glucose Glucose is an important type of sugar. Many concentration below 2.0 mmol/l. forms of food (e.g. milk formula) contain glucose. Infants also get glucose from lactose in breast milk and from the breakdown of 4-15 What are the dangers of starch when solids are added to the diet. hypoglycaemia? Glucose is an essential source of energy to many cells of the body, especially the brain. Hypoglycaemia is extremely dangerous, Glucose is stored as glycogen in the liver. especially when the blood glucose Glucose can also be stored as fat and protein. concentration is below 1.5 mmol/l and the The liver can change stores of glycogen, fat and infant has abnormal neurological signs. When protein back into glucose. the blood glucose concentration is low the cells of the body, particularly the brain, do not The amount of glucose available to the cells can receive enough glucose and as a result cannot be assessed by measuring the concentration of produce energy for their metabolism. With glucose in the blood. severe hypoglycaemia the brain cells can be damaged or die, causing cerebral palsy, mental 4-12 How is blood glucose measured in the retardation or death. Mild hypoglycaemia is nursery? important as it may rapidly progress to severe The quickest, cheapest and easiest method to hypoglycaemia. Every effort must , therefore, measure the blood glucose concentration in be made to treat mild hypoglycaemia the nursery is to use a reagent strip such as promptly. Haemoglukotest, Glucotrend or Dextrostix. However, a far more accurate method to screen Hypoglycaemia may cause brain damage. for hypoglycaemia is to read the colour of the reagent strip with a glucose meter such as reading Haemoglukotest strips with a Reflolux 4-16 Which infants are at risk of developing meter. It is important to carefully read the hypoglycaemia? instructions which are packed with the reagent Infants that have reduced energy stores, strips as the correct method must be used. reduced energy intake (feed poorly) or increased energy needs are at risk of 4-13 What is the normal concentration of hypoglycaemia. glucose in the blood? The normal concentration of glucose in the Hypothermia causes hypoglycaemia. blood of newborn infants is 2.0 mmol/l to 7.0 mmol/l. 4-17 What are the clinical signs of 4-14 What is hypoglycaemia? hypoglycaemia? Hypoglycaemia is defined as a blood glucose Hypoglycaemia may produce no clinical signs concentration below 2.0 mmol/l. Mild or present with only non-specific signs. This hypoglycaemia is defined as a blood glucose makes the clinical diagnosis of hypoglycaemia concentration between 1.5 to 2.0 mmol/l in very difficult. When present, the clinical signs an infant without any abnormal neurological of hypoglycaemia are:
  • 4. 64 PRIMAR Y NEWBORN CARE 1. The infant may be lethargic and hypotonic, 4. Whenever possible, milk feeds should be feed poorly, have a weak cry, apnoea, given. Both clear feeds and dextrose feeds cyanosis or an absent Moro reflex. should not be used in newborn infants as 2. The infant may be jittery with a high they are low in energy and may result in pitched cry, a fixed stare and fisting, have hypoglycaemia. abnormal eye movements or convulsions. 5. If milk feeds cannot be given, then an 3. Excessive sweating. This sign may not be intravenous infusion of 10% glucose (e.g. present, however, especially in preterm Neonatalyte) should be started. infants. 6. Prevent hypothermia. Often an infant has both signs of decreased With a policy of breast feeding as soon brain function, such as lethargy and poor as possible after delivery, most cases of feeding, as well as signs of excessive brain hypoglycaemia can be prevented. function, such as jitteriness and convulsions. The clinical presentation of hypoglycaemia is very variable which makes the clinical Early breast feeding can usually prevent diagnosis of hypoglycaemia difficult. hypoglycaemia. Therefore, the diagnosis of hypoglycaemia can be easily missed. 4-20 How should you treat an infant with mild hypoglycaemia? Hypoglycaemic infants may have no abnormal Infants with a blood glucose concentration clinical signs. between 1.5 mmol/l and 2.0 mmol/l and no clinical signs of hypoglycaemia usually need milk feeds urgently to prevent severe 4-18 How can you diagnose hypoglycaemia: hypoglycaemia? 1. If they tolerate oral or nasogastric feeds, As the clinical diagnosis is difficult and often give 10 ml/kg breast milk or milk formula missed, it is essential that all infants at risk immediately. Do not give 5% or 10% of hypoglycaemia, and infants with clinical dextrose orally as the energy content is less signs that may be caused by hypoglycaemia, than that of breast milk or milk formula. be screened with reagent strips. Whenever 2. Repeat the reagent strip reading 30 minutes possible, use a glucose meter rather than after the feed to determine whether the reading the reagent strip by eye. Ideally a blood glucose concentration has returned diagnosis of hypoglycaemia made with reagent to the normal range. If it is still in the strips should be confirmed with a laboratory mild hypoglycaemia range, repeat the feed blood glucose measurement. with an added 5 g sugar (1 teaspoon) per 30 ml milk and repeat the reagent strip 4-19 How can you prevent hypoglycaemia? measurement after another 30 minutes. Every effort must be taken to prevent 3. When the blood glucose concentration has hypoglycaemia by: returned to normal, continue with regular milk feeds and continue to monitor with 1. Identifying all infants at high risk of reagent strips hourly for 3 hours. developing hypoglycaemia. 4. If the blood glucose concentration falls 2. Monitoring the blood glucose concentration below 1.5 mmol/l then treat as for severe of these infants with reagent strips. hypoglycaemia. 3. Feeding all infants as soon as possible after 5. If the infant is too small or too ill to delivery, especially low birth weight infants tolerate milk feeds, start an intravenous and infants of diabetic women. infusion of 10% glucose (e.g. Neonatalyte) and transfer to a level 2 or 3 hospital.
  • 5. EMERGENC Y MANAGEMENT OF INFANTS 65 Most infants with mild hypoglycaemia respond 6. Keep the infant warm. well to milk feeds and do not need to be 7. The infant now needs to be referred transferred. Establish breast feeding as soon as urgently to the referral hospital. It is very possible to prevent hypoglycaemia recurring. important that the infant’s blood glucose remains normal during transport. 4-21 How should you treat an infant with 4-22 How frequently should you measure severe hypoglycaemia? the blood glucose concentration? All infants with a blood glucose concentration 1. In most infants at high risk of below 1.5 mmol/l, or hypoglycaemia hypoglycaemia, the blood glucose with abnormal clinical signs, have severe concentration should be measured hourly hypoglycaemia. This is a medical emergency with reagent strips for the first 3 hours, and must be treated immediately. The then 3 hourly until 100 ml/kg/day milk management of severe hypoglycaemia consists feeds have been established which is of the following steps: usually in 24 to 48 hours. 1. The treatment of choice is to start an 2. Infants with mild hypoglycaemia should intravenous infusion of 10% glucose (e.g. be monitored every 30 minutes until the Neonatalyte) at a drip rate calculated to blood glucose concentration has returned give 100 ml/kg in the first 24 hours. Give a to the normal range. Readings should then bolus of 2 ml/kg of the 10% glucose over 5 be made hourly for 3 hours to ensure that minutes at the start of the infusion. the blood glucose concentration does not 2. If you cannot rapidly put up a peripheral fall again. Thereafter, measure the blood intravenous line, insert an umbilical vein glucose concentration 3 hourly until milk catheter. feeds are established. 3. Repeat the reagent strip measurement 3. Infants with severe hypoglycaemia should after 15 minutes. If the blood glucose have their blood glucose concentration concentration has not returned to normal, measured every 15 minutes until it has dilute 5 ml of 50% dextrose with 5 ml of increased above 1.5 mmol/l. Then measure the 10% dextrose infusion fluid to give a the blood glucose concentration hourly 30% glucose solution. Inject 5 ml of this until the infant arrives at the referral unit. 30% glucose solution over 5 minutes into the plastic bulb of the infusion set. It is not 4-23 What is the prognosis after advisable to inject 50% dextrose, as it is hypoglycaemia? extremely hypertonic. 4. If the blood glucose concentration still has The risk of brain damage depends on not returned to normal within a further 15 the severity, duration and number of minutes phone your referral hospital. They hypoglycaemic attacks. The prognosis is worst may ask you to give 5 mg hydrocortisone if the hypoglycaemia has produced clinical intravenously or glucagon 0.3 mg/kg signs, especially convulsions. intramuscularly. 5. In an emergency, if you are unable to give intravenous dextrose, give the infant 10 MANAGEMENT OF ml/kg breast milk or formula (or sweetened RESPIRATORY DISTRESS cow’s milk if neither is available) by mouth or via a nasogastric tube. You can add 5 g (a teaspoon) of sugar or 5 ml of 50% dextrose 4-24 What is respiratory distress? per 10 ml feed to increase the glucose concentration. Do not give pure 50% Respiratory distress is a collection of clinical dextrose orally, as it will cause vomiting. signs, which indicate that the infant has
  • 6. 66 PRIMAR Y NEWBORN CARE difficulty breathing. The 4 most important infant is unable to expand them again during clinical signs of respiratory distress are: inspiration. Collapsed alveoli, due to the lack of surfactant, result in respiratory distress. 1. Tachypnoea. A respiratory (breathing) rate This condition is known as hyaline membrane of 60 or more breaths per minute (normal disease (HMD). respiratory rate is about 40). 2. Central cyanosis. A blue tongue in room air. Hyaline membrane disease is caused by too little 3. Recession. The in-drawing of the ribs and surfactant in immature lungs. sternum during inspiration (also called retraction). 4. Grunting. A snoring noise made in the 4-27 What is the shake test? throat during expiration. The amount of surfactant in the fetal lung can If an infant has central cyanosis plus 1 or more be determined after birth by doing a shake test of the above clinical signs, the infant is said to on a sample of gastric aspirate obtained within have respiratory distress. 30 minutes after delivery. A positive shake test indicates that adequate surfactant is present 4-25 What are the important causes of in the lungs of the newborn infant. A negative respiratory distress? test indicates inadequate surfactant and strongly suggests that the infant has hyaline Respiratory distress in newborn infants membrane disease. is usually caused by one of the following conditions: It is important to pass a nasogastric tube and aspirate the stomach of all preterm infants 1. Hyaline membrane disease soon after birth. The sample should be sent 2. Wet lung syndrome in a syringe or test tube with the infant when 3. Meconium aspiration it is referred to a level 2 or 3 unit so that the 4. Pneumonia shake test can be done at the referral hospital. Other less common causes of respiratory The result is very useful in managing an infant distress include hypothermia and anaemia. with respiratory distress. The gastric aspirate can also be used to help There are many different causes of respiratory diagnose congenital pneumonia when pus distress. cells and bacteria can often be seen under the microscope. 4-26 What is hyaline membrane disease 4-28 How do you diagnose hyaline (HMD)? membrane disease? At term the fetal lungs are mature and ready to 1. The infant is preterm. be filled with air after delivery. The alveoli (air 2. The infant develops respiratory distress at or sacs) of these mature lungs secrete a substance soon after delivery. The signs of respiratory called surfactant that prevents them collapsing distress gradually become worse. at the end of expiration. This allows the 3. The infant usually moves very little and infant to breathe air in and out with very little commonly develops peripheral oedema. physical effort. 4. The shake test on gastric aspirate is negative indicating inadequate surfactant. In contrast, many preterm infants have immature lungs, which do not have adequate amounts of surfactant at birth. As a result the alveoli collapse with expiration and the
  • 7. EMERGENC Y MANAGEMENT OF INFANTS 67 4-29 What is the clinical course in hyaline 4. The shake test on the gastric aspirate membrane disease? is positive, which excludes hyaline membrane disease. The degree of respiratory distress gets worse during the first 48 hours after birth and the concentration of inspired oxygen, needed to The wet lung syndrome is the commonest cause keep the infant pink, increases for the first 2 to of respiratory distress. 3 days (48 to 72 hours). During this time some infants will die of hyaline membrane disease. Otherwise the respiratory distress starts to 4-32 What is the clinical course of the wet improve. As the respiratory distress can be lung syndrome? expected to get worse during the first few days, The respiratory distress in infants with the wet it is important the infant be transferred to a lung syndrome gradually improves during the level 2 or 3 unit as soon as possible. first 24 hours and usually recovers by 72 hours. Oxygen is needed for a few hours to 3 days Hyaline membrane disease gets worse before it only. Usually less than 40% oxygen is required. gets better. The clinical course of the wet lung syndrome, therefore, is very different from that of hyaline membrane disease. 4-30 What is the wet lung syndrome? Before delivery the fetal lungs are not The wet lung syndrome is important because it collapsed but filled with lung fluid. At vaginal can be confused with hyaline membrane disease. delivery, most of this fluid is squeezed out of the lungs as the chest is compressed in the birth canal. After birth the remaining fluid 4-33 What is the meconium aspiration is coughed up or is absorbed within a few syndrome? minutes. In some infants this rapid removal If the fetus is hypoxic in utero it may become of fetal lung fluid does not take place resulting distressed, pass meconium, and make gasping in the wet lung syndrome which presents movements, which suck the meconium after delivery as respiratory distress. The stained liquor into the larynx and trachea. If wet lung syndrome is the commonest cause the airways are not well suctioned after the of respiratory distress. It is also important infant’s head is delivered, the meconium can because during the first day of life it can easily be inhaled into the smaller airways and alveoli be confused with hyaline membrane disease. with the onset of breathing. This results in the The wet lung syndrome is usually seen in meconium aspiration syndrome. Many cases term infants, especially after fetal distress, of severe meconium aspiration syndrome maternal sedation, caesarean section and can be prevented by carefully suctioning the polyhydramnios. In these infants the normal upper airways of meconium stained infants clearance of lung fluid is often delayed before they breathe at birth. The risk of the for many hours resulting in the wet lung meconium aspiration syndrome is particularly syndrome. high if the meconium is very thick. 4-31 How can you diagnose the wet lung The airways of all meconium stained infants syndrome? should be well suctioned before delivering the 1. These infants are usually born at term. shoulders. 2. They develop respiratory distress from delivery. 3. They have a typical clinical course.
  • 8. 68 PRIMAR Y NEWBORN CARE 4-34 How do you diagnose the meconium 1. Keep the infant warm, preferably in an aspiration syndrome? incubator. 2. Handle the infant as little as possible, 1. The infant is usually born at term or post because stimulating the infant often term but only rarely preterm. increases the oxygen requirements. There 2. The liquor is meconium stained. is no need to routinely suction the airways. 3. Meconium may be suctioned from the 3. Provide energy, to prevent hypoglycaemia. mouth and upper airways at birth and the Preferably give an infusion of 10% infant is usually meconium stained. glucose (e.g. Neonatalyte). Milk feeds by 4. Respiratory distress is present and the nasogastric tube can be given to infants chest usually appears hyperinflated (over with mild respiratory distress. expanded). 4. Treat central cyanosis by giving oxygen. Give oxygen therapy correctly. 4-35 What is the clinical course of the 5. Record the following important meconium aspiration syndrome? observations every hour and note any From birth the meconium stained infant has deterioration: respiratory distress which, in severe cases, • respiratory rate gets progressively worse and may kill the • presence or absence of recession and infant. Milder cases will gradually recover grunting over days or weeks. Infants who survive severe • presence or absence of cyanosis meconium aspiration often have damaged • percentage of oxygen given lungs that may take months to recover. • heart rate • both the skin and incubator 4-36 What are the common causes of temperature pneumonia? 6. Consult the staff of the nearest level 2 or 3 hospital, as the infant may need to be An infant may be born with pneumonia transferred. This is particularly important (congenital pneumonia) as a complication in hyaline membrane disease where early of chorioamnionitis. Other infants may transport is best. A chest X ray at the develop pneumonia in the days or weeks after referral hospital will help decide the cause delivery, due to the spread of bacteria in a of the respiratory distress. nursery. Preterm infants are at an increased 7. If the infant develops recurrent apnoea, or risk of pneumonia. if oxygen fails to keep the infant pink, then mask and bag ventilation should be started. 4-37 How can you diagnose pneumonia? 8. Parenteral antibiotics must be given if pneumonia is diagnosed. Either 1. The infant develops signs of respiratory ceftriaxone 50mg/kg daily by IM or IV distress and also appears clinically ill. injection or a combination of daily benzyl 2. The diagnosis of congenital pneumonia penicillin 50 000 units/kg/day IV plus complicating chorioamnionitis is suggested gentamicin 7.5 mg/kg IM daily. by seeing pus cells and bacteria in a Gram 9. Unfortunately there is no specific stain of the gastric aspirate after delivery. treatment for the infant with respiratory distress caused by meconium aspiration. 4-38 How should you manage an infant 10. Transfer is not as urgent in infants with with respiratory distress? wet lung syndrome as they usually improve The principles of care are the same, irrespective after the first few hours and rarely need of the cause of the respiratory distress. more than 40% oxygen. Therefore, all infants with respiratory distress 11. Infants who do not need to be transferred should receive the same general management: should be nursed in an incubator and given oxygen as required. Three hourly
  • 9. EMERGENC Y MANAGEMENT OF INFANTS 69 feeds by nasogastric tube, rather than an 4-41 How much oxygen is needed by the intravenous infusion, can usually be given normal infant? to these infants. The normal oxygen saturation in a newborn infant is 86 to 92%. This indicates that the infant is breathing the correct amount of THE CORRECT USE OF oxygen. If the saturation is less than 86% the OXYGEN THERAPY infant is not getting enough oxygen while a saturation above 92% indicates that the infant may be getting too much oxygen. A saturation 4-39 Why does the body need oxygen? monitor is very useful to assess whether a newborn infant with respiratory distress is Oxygen is needed by all the cells of the body. getting the correct amount of oxygen. Without enough oxygen the cells, especially of the brain, will be damaged or die. However, too much oxygen is also dangerous and can The normal saturation of oxygen in the blood is damage cells. In the body, oxygen is carried 86 to 92%. by red blood cells from the lungs to all the other organs. When loaded with oxygen the red blood cells are red in colour. With too little 4-42 When does an infant need extra oxygen they are blue. oxygen? An infant needs extra oxygen if it becomes Too little oxygen can cause brain damage. centrally cyanosed or if the saturation of oxygen falls below 86%. 4-40 How do you measure the amount of 4-43 Can you give too much oxygen? oxygen in the blood? Yes. If too much oxygen is given the oxygen 1. This can be roughly assessed clinically saturation will rise above 92%. Preterm infants, as the infant appears peripherally and especially infants below 34 weeks gestation, are centrally cyanosed if there is not enough at risk of oxygen damage to the eyes (known oxygen in the red cells. This clinical as retinopathy of prematurity) if excessive method may be inaccurate and should, amounts of oxygen are given. The damage to whenever possible, be confirmed by the retina is done by too much oxygen in the measuring the oxygen saturation. blood and not due to the direct effect on the 2. At the bedside the oxygen saturation can infant’s eyes of oxygen in the headbox. be measured with a saturation monitor (i.e. pulse oximeter), which simply clips onto At resuscitation it is probably safe to use the infant’s hand or foot and measures the oxygen for a short period only until the infant oxygen saturation through the skin. The is pink and breathing well. oxygen saturation is given as a percentage. It indicates the amount of oxygen being Too much oxygen is dangerous as it may cause carried by the red cells. blindness. 3. In a laboratory the amount of oxygen in the blood can also be measured accurately in a sample of arterial blood. 4-44 When should you give an infant extra oxygen? 1. During resuscitation if the infant does not respond rapidly to mask ventilation with room air
  • 10. 70 PRIMAR Y NEWBORN CARE 2. When there is respiratory distress The amount of oxygen being given in a 3. When the infant has central cyanosis headbox can be measured with an oxygen 4. When the oxygen saturation is less than monitor. The probe of the oxygen monitor is 86% placed in the headbox and the display on the monitor box shows the amount of oxygen that 4-45 Which infants do not need extra the infant is breathing. oxygen? 4-48 How much oxygen should you give? 1. Infants with normal Apgar scores at birth 2. Infants with peripheral but not central The percentage of oxygen given in the headbox cyanosis. If there is peripheral cyanosis should be increased until: only, the cause is usually cold hands and 1. Central cyanosis is corrected (the tongue feet with poor perfusion, rather than is pink). hypoxia. 2. The oxygen saturation is 86–92%. 3. Preterm infants with a normal oxygen saturations The required percentage of oxygen given to keep different infants pink may vary from 21 4-46 What methods can you use to to 100%. For example, an infant with severe administer oxygen? hyaline membrane disease may need 90% oxygen while another infant with mild wet 1. Oxygen is most commonly given into a lung syndrome may need only 25% to achieve a perspex head box. This is the best method normal oxygen saturation. Do not confuse the of administering oxygen in a level 1 unit, percentage of oxygen given in a headbox with as it is a simple, cheap and highly effective the oxygen saturation in the infant’s blood. method. 2. At resuscitation oxygen is given via a mask 4-49 How can you control the amount of and bag. oxygen given? 3. In a level 2 or 3 unit, oxygen is sometimes given via nasal prongs to infants with As there are dangers in giving too much or respiratory distress syndrome. Other infants too little oxygen, it is important to give oxygen may need to be intubated and ventilated. correctly. Oxygen should not be given directly into a In a level 1 hospital or clinic, oxygen is usually closed incubator as this method is wasteful, given by headbox. Whenever possible, an high concentrations cannot be reached and air/oxygen blender should be used so that the concentration of oxygen drops every time the percentage of oxygen in the headbox can an incubator port is opened. Giving 100% be accurately controlled. If a blender is not oxygen via a cardboard cup is extremely available, a venturi can be used. The venturi dangerous, especially if used for a long time, is a plastic gauge, which controls the amount as it is almost impossible to control the of air and oxygen being mixed. Some venturis percentage of oxygen accurately. mix pure oxygen with room air to give any required percentage of oxygen while others 4-47 How can you measure the amount of only give a fixed percentage. extra oxygen given? Whenever possible, an oxygen monitor should There is 21% oxygen in room air. Piped oxygen be used to accurately measure the percentage or oxygen from cylinders provides 100%. of oxygen in the headbox. It is very dangerous More and more oxygen can be added to room to attempt to control the percentage of oxygen air until 100% oxygen is reached. It is very given into a head box by simply altering the important to know how much extra oxygen flow rate. the infant is receiving.
  • 11. EMERGENC Y MANAGEMENT OF INFANTS 71 Always give headbox oxygen via a blender or 4-53 What is the aim of care during transfer? venturi. The aim is to keep the infant in the best possible clinical condition while it is being 4-50 Should you humidify oxygen? moved from the clinic to the hospital. This is achieved by providing the following: Yes. Oxygen should always be humidified, as oxygen from a cylinder is very dry. Dry oxygen 1. A warm environment irritates the airways. Usually it is not needed to 2. An adequate supply of oxygen warm oxygen if it is given by a headbox. 3. A source of energy 4. Careful observations 4-51 What flow rate of oxygen should you This greatly increases the infant’s chance of use? survival without brain damage. When oxygen is given into a headbox, either directly or via a blender or venturi, the flow 4-54 Which infants should be transferred to should be 5 litres per minute. A high flow rate a level 2 or 3 hospital? wastes oxygen and cools the infant. All infants that need management, which cannot be provided at a level 1 hospital or clinic, must be referred to the nearest level TRANSFERRING A 2 hospital with a special care unit or a level NEWBORN INFANT 3 hospital with an intensive care unit. The following infants should be transferred: 1. Preterm infants, especially infants less than 4-52 Why should newborn infants be 36 weeks gestation transferred? 2. Infants with a birth weight under 1800 g. If pregnant women are correctly categorised Most infants between 1800 g and 2500 g into low risk and high risk groups during do not need to be referred and can be sent pregnancy and labour, low risk infants can home. be delivered at level 1 hospitals and clinics 3. Infants with asphyxia that require with the necessary staff and equipment to ventilation during resuscitation care for them. However, when maternal 4. Infants who need emergency management categorisation is incorrect, when unexpected for hypothermia, hypoglycaemia or problems present during or after delivery, or respiratory distress when a mother with a complicated pregnancy 5. Infants with problems such as severe or labour arrives in advanced labour at a level infection, marked jaundice, trauma or 1 hospital or clinic, then the infant may need bleeding to be transferred to a hospital with a level 2 6. Infants with major congenital abnormalities, or 3 unit. especially if urgent surgery is needed If possible, it is better for the infant to be Any infant needing possible referral must transferred before delivery than after birth. The first be discussed with the staff at the referral mother is the best incubator during transfer. hospital. Each region should establish its own referral criteria so that the staff knows which infants need to be transferred. It is better to transfer the mother before delivery than to transfer the infant after birth. Each region must draw up its own referral criteria.
  • 12. 72 PRIMAR Y NEWBORN CARE 4-55 Why should the infant be resuscitated 3. Hypoxia: It is essential that infants receive and stabilized before being transreffed? oxygen during transfer if this is needed. All the equipment required for the safe It is very important that the infant is fully administration of oxygen should be resuscitated and stabilised before being available. Infants who do not need extra transferred. The infant must be warm, well oxygen must not be given oxygen routinely oxygenated and given a supply of energy while being transferred. Some infants before being moved. Transferring a collapsed with respiratory distress or apnoea need infant will often kill the infant. The clinic staff ventilation during transfer. and the transfer personnel should together assess the infant and ensure that the infant is in the best possible condition to be moved. 4-58 Who should transfer a sick infant? Vehicles to transfer infants must be provided 4-56 How should the transfer be arranged? by the local authority in each region. Ideally an ambulance should be used. If possible, If possible, the hospital staff that will ambulance personnel should be trained to care receive the infant should make the transfer for infants during transfer. When this service arrangements. The hospital staff can then is not available, the referral hospital should advise on management during transfer and be provide nursing or medical staff to care for ready to receive the infant in the nursery. The the infant while it is being moved from the unexpected arrival of an infant at the hospital clinic to the hospital. A transport incubator, must be avoided. The clinical notes and a oxygen supply and emergency box of essential referral letter must be sent with the infant. resuscitation equipment should always be A sample of gastric aspirate, collected soon available at the referral hospital for use in after delivery for microscopy and the shake transferring newborn infants. Only as a last test, is very helpful, especially in preterm resort should the clinic provide a vehicle and infants, infants with respiratory distress and staff to transfer a sick infant to hospital. infants with suspected congenital pneumonia. Consent for surgery should also be sent if a surgical problem is diagnosed. 4-59 Should the mother also be transferred to hospital? 4-57 What are the greatest dangers during Yes, whenever possible, the mother should be transfer? transferred to hospital with her infant. 1. Hypothermia: Infants must be kept warm during transfer and their skin temperature should be regularly measured. A transport CASE STUDY 1 incubator is the best way to keep the body temperature normal. If an incubator is not A 1500 g infant is brought to an outlying clinic available, hypothermia can be prevented on a cold winters day. The mother delivered 30 by using skin-to-skin care or by dressing minutes before and has remained at home. The the infant and then wrapping the infant in infant’s axillary temperature is 34.5 ºC but the a silver swaddler (space blanket) or heavy infant appears active. The clinic does not have gauge tin foil. an incubator. 2. Hypoglycaemia: Some supply of energy must be provided during transfer. Either 1. What error was made in the management milk feeds or intravenous fluids should be of this infant? given. The blood glucose concentration The infant should have been kept warm. Skin- should be regularly measured with to-skin care is very effective in keeping an reagent strips.
  • 13. EMERGENC Y MANAGEMENT OF INFANTS 73 infant warm after delivery. An infant should 3. Why does this term infant have a low never be allowed to get cold after delivery. blood glucose concentration? Because the infant is cold. Hypothermic 2. How can you warm this infant in the infants often become hypoglycaemic as they clinic? rapidly use up all their energy stores such as You can use an incubator or a warm room to glycogen and fat. In addition this infant is correct the infant’s temperature. The staff can wasted and, therefore, was born with reduced also give skin-to-skin care themselves. energy stores. 3. When should the infant be moved to 4. What are the clinical signs of hospital? hypoglycaemia? If possible, it is best to warm the infant first Often there are no clinical signs. Severe before moving it to hospital. hypoglycaemia may cause neurological signs such as lethargy, decreased tone, poor feeding, 4. How can the infant be kept warm in the a weak cry, absent Moro, jitteriness and ambulance? convulsions. If possible, a transport incubator should be 5. How would you treat this infant at the used. If this is not available, use skin-to-skin clinic? care. Otherwise, the infant should be warmly dressed and wrapped in a blanket. A thermal Give the infant a feed of breast milk or blanket (or aluminium foil) can also be used. formula. If neither is available, sweetened Remember that the infant must be warmed cow’s milk may be used. The infant must also before it is placed in a thermal blanket. be warmed. The blood glucose concentration should have returned to normal in 15 minutes. If not, repeat the feed and arrange urgent CASE STUDY 2 transport to the nearest hospital. If the infant develops severe hypoglycaemia an infusion 10% dextrose (e.g. Neonatalyte) must be A term infant is brought to a rural clinic after started. It is very important to start treatment having been born at home. The infant is cold before referring the infant to hospital. and wasted but otherwise appears well. A Haemoglukotest reagent strip, read by naked eye, gives a reading between 1.5 and 2 mmol/l. CASE STUDY 3 1. What is your interpretation of the blood glucose concentration? A male infant is born at 32 weeks gestation in a level 1 hospital. Soon after delivery his The infant has mild hypoglycaemia. respiratory rate is 80 breaths per minute with recession and expiratory grunting. The infant’s 2. What is the danger of mild tongue is blue in room air. A gastric aspirate is hypoglycaemia? collected 10 minutes after delivery. The infant is at high risk of developing severe hypoglycaemia. 1. Which clinical signs indicate that the infant has respiratory distress? Tachypnoea, recession, grunting and central cyanosis in room air.
  • 14. 74 PRIMAR Y NEWBORN CARE 2. What is the probable cause of the CASE STUDY 4 respiratory distress? The infant probably has hyaline membrane A 3 day old, term infant has pneumonia in a disease due to immature lungs. Hyaline level 1 hospital and is nursed in an incubator. membrane disease is common in infants born The infant is cyanosed in room air and needs preterm. oxygen therapy. 3. What is the value of collecting a sample 1. What equipment should be used to of gastric aspirate? administer the oxygen? Diagnosing the cause of the respiratory The best method to give this infant oxygen distress is often helped if a sample of gastric would be a perspex head box. Giving oxygen aspirate is collected soon after delivery. The directly into the incubator is unsatisfactory diagnosis of hyaline membrane disease is as it uses a lot of oxygen. In addition, high supported by a negative shake test, which concentrations of oxygen cannot be given and indicates immature lungs. A Gram stain the amount of oxygen in the incubator drops if showing pus cells suggests that the infant has a porthole is opened. congenital pneumonia as a complication of chorioamnionitis. 2. How should you measure the amount of oxygen given? 4. Should this infant remain at the level 1 The concentration of oxygen in the head hospital? box should be measured with an oxygen No, he should be moved as soon as possible to monitor. The amount of oxygen given must a level 2 or 3 hospital with staff and facilities not be measured in litres per minute with a to care for sick infants. Hyaline membrane flow meter, as this is an extremely inaccurate disease deteriorates for 2 to 3 days before method of estimating the amount of oxygen improving. Therefore, this infant should be being given. transferred as soon as possible. 3. How should you control the percentage 5. How would you manage this infant of oxygen given? before transfer to a larger hospital? With an oxygen-air blender or a venturi. Keep the infant warm and give just enough oxygen via a head box to keep the tongue 4. Why should the oxygen be humidified? pink. If a saturation monitor is available, keep the oxygen saturation between 86 and Because unhumidified gas is very dry and 92%. Handle the infant as little as possible will irritate the linings of the nose, throat and after starting an intravenous infusion of 10% airways. dextrose (e.g. Neonatalyte). Carefully observe his respiration rate and pattern, colour, heart 5. What flow rate of oxygen should be rate and temperature. Ventilate with a bag and given into the head box? mask if the infant develops apnoea or remains A flow rate of 5 litres per minute is best. This is cyanosed in 100% oxygen. measured on the flow meter. 6. How should the amount of oxygen in the infant’s blood be measured? With a saturation monitor.
  • 15. EMERGENC Y MANAGEMENT OF INFANTS 75 CASE STUDY 5 management. Only then should the infant have been transferred. A 1700 g infant is born in a rural clinic. The clinic staff call for an ambulance to take the 2. What was wrong with the management infant to the nearest hospital. The hospital is of the infant at the clinic? not contacted. The infant, which appears well, The infant should have been fed before is wrapped in a blanket and not given a feed. referral. A transport incubator or silver The note to the hospital reads ‘Please take over swaddler should have been used to prevent the management of this small infant’. hypothermia on the way to hospital. Skin-to- skin care could also have been used. 1. How should the transfer of this infant have been arranged? 3. Why was the referral note inadequate? The clinic staff should have contacted the The referral letter should give all the necessary referral hospital and discussed the problem details of the pregnancy, the delivery and the with them. The hospital staff should infant’s clinical condition. have advised the clinic staff as to further