Hopefully you all had a chance to read the instructions on how to access a port and view the port accessing video. I’m optimistic that after this presentation you will be able to see how that exercise related to dual coding. White board activity Take a moment to compare your thoughts after you read the instructions. -Type in your thoughts, emotion, reactions – if you had to go perform a port access after reading the direction. Exactly our brains haven’t absorbed the whole lesson when only the text channel is used. A visual channel can also be used to facilitate learning. -Now type in your thoughts, emotions, reactions – if you had to go perform a port access after watching the video. Still fearful, but perhaps better prepared. Obviously you still need to learn more – perhaps through another medium – such as lecture, ability to ask questions? The instructions were very detailed, but until you visualized and processed the information differently, you had a limited idea (and still might have confusion) on how to perform that skill. The dual coding theory can be used by instructors to simplify lessons and not short circuit their student’s brains, but (as you probably realized in our exercise) even a video instruction can miss important details.
For example: with this being your first exposure to this material you likely have never heard of some of the terms used in the video: Port – Also called a port-a-cath, Mediport, depending on the brand name. The port is the like round disc with a plastic center and is placed directly under the skin (usually on the chest). It has a long tube that runs to the edge of the heart, which is why it is so easy to remove blood for labs and safely give medication through it. QUESTIONS
EMLA cream - The kids call it numbing lotion, that can be placed on the skin to dull painful procedures.
Huber needle – is a hooked needle that enters the port, but lays flat against the skin, it also won’t damage or remove chunks of plastic from the port itself.
Vacutainer – is a handy medical device that hooks up to the end of the port needle tubing to draw blood. It is especially safe for employees, because you can’t stab yourself with the device and it prevents needle-stick injuries.
Big word alert! – Neutropenia means that you don’t have enough white blood cells (like the soldiers in your blood stream that attack germs) to fight an infection. It makes sense that these patients are neutropenic, because they have gotten chemotherapy to kill cancer cells, but it also kills the white blood cells, and hair cells, and most of their good cells too. Cancer patients don’t have much of an immune system, so common germs can be very deadly. A small fever may be the only sign that there is a lethal infection raging.
Which leads us to Septic shock – Imagine all the blood vessels in your body as a series of garden hoses that have a changing diameter. They can get bigger or smaller, to control your blood pressure. Just like your garden hose, if you hook up a skinny hose, it sprays a long way - that would be high blood pressure, or if you hook up a big hose and only a dribble comes out – that would be a low blood pressure. What does this have to do with our video? When certain bacteria invade the body, they rupture and spread and send messages to the blood vessels to get very big. Suddenly the patient’s blood pressure is low and they aren’t getting fresh blood to their brain, heart, and important organs. This is called septic shock. With no immune system and without immediate antibiotics, a patient could die within 30 minutes of having a fever.
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