Answer :
Final answer:
Excessive ventilation in post-cardiac care patients can lead to barotrauma, a condition caused by the high air pressure in the lungs. While it is essential to enhance oxygenation in these patients, it should be done within limits to prevent harmful conditions. Both inadequate and excessive ventilation can lead to different detrimental situations.
Explanation:
The prime reason to avoid excessive ventilation in post-cardiac care patients is that it can lead to a condition known as barotrauma (option a). Barotrauma occurs when high pressure of the air being pumped into the lungs leads to injuries. Hyperpnea, for example, is an increased rate and depth of ventilation due to an increase in oxygen demand that does not significantly alter blood oxygen or carbon dioxide levels. It may happen during intense exercise or due to disease. However, too much ventilation could lead to hyperventilation, causing abnormally low blood carbon dioxide levels and high blood pH, a condition known as Respiratory Alkalosis.
Contrarily, hypoxia (option b) actually results from inadequate oxygen supply, not excessive ventilation. Hence, it's critical to maintain a balance when ventilating post-cardiac care patients because both too low or too high ventilation rates can result in different harmful conditions. Note that while increased ventilation can indeed improve oxygenation (option c), it must be done within limits to avoid barotrauma. Option d is incorrect since excessive ventilation does have effects on post-cardiac care patients, as explained.
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