monitoreo electronico fetal

1. DR. CHRISTIAN VELA ACUÑA DR. CARLOS ALBERTO DÍAZ

9. INTERPRETACIÓN OCT NEGATIVO: Sin desaceleraciones POSITIVO: Desaceleraciones tardías en más del 50% de las contracciones, aún si la frecuencia es menor de 3 contracciones en 10 minutos SOSPECHOSO: Desaceleraciones tardías ocasionales o desaceleraciones variables INSATISFACTORIO: Menos de 3 contracciones en 10 minutos o mala calidad del trazado

23. This pattern is strongly associated with fetal hypoxia, most often seen in the presence of severe fetal anemia. There will be a high correlation with significant fetal acidosis or severe anemia. These criteria for identifying a sinusoidal FHR include (1) a stable baseline FHR of 120 to 160 bpm with regular sine wavelike oscillations, (2) an amplitude of 5 to 15 bpm, (3) a frequency of 2 to 5 cycles/min, (4) fixed or absent short-term variability, (5) oscillation of the sine wave above and below the baseline, and (6) absence of accelerations

25. These are accelerations of the fetal heart. They are usually seen with fetal movement, and are often coincident with uterine contractions as well, as in this patient.

26. This figure shows prolonged and repetitive accelerations, especially on the lower panel. Accelerations that are sustained or confluent can be easily confused with a tachycardia and the return to baseline can be confused with decelerations.

30. DESACELERACIÓN TEMPRANA

33. The two most common causes of late decelerations in labor are excessive uterine contractions (usually caused by oxytocin) and maternal hypotension. Both result in decrease in uteroplacental perfusion, hypertonus by interrupting the transmyometrial perfusion for a prolonged period, and hypotension by dropping the perfusion pressure, thus increasing the amount of time perfusion is interrupted even with a normal contraction. UA, uterine artery.

34. DESACELERACIÓN TARDIA

39. DESACELERACIONES VARIABLES

40. These are typical variable decelerations. Note that such decelerations are often recognized by the accelerations that precede and follow the decelerations.

42. DESACELERACIÓN VARIABLE COMPLICADA