Why do doctors lower a patient's body warmth during sympathetic heart surgery?
Answers:
same as putting food surrounded by the fridge
lowers metabolism
You can effectively stop the heart and do the indispensable repair while the patient is on the pump-oxygenator (heart-lung machine). Considerably more difficult to put accurately placed sutures in a beating heart.
Warm the merciful up and the heart again begins to beat. Source(s): I watched this a time or two. Dramatic. But probably old-hat to a surgeon or an anesthesiologist.
Lowering the PT's temperature reduces the metabolic requirements of the cells. Thus reducing the total perfusion requirements of the body. While the patient is on Cardiopulmonary Bypass , the blood oxygen levels are reduced. Placing the patient within a hypothermic state reduces the brain's and other tissues demand for oxygen, permitting longer operating times.
so the heart doesn't pump as much, or as quickly
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