Assuming a constant rate of breathing, which of the following inspiratory/expiratory ratios (I:E) would tend to most greatly impair a patient's systemic diastolic pressure?

Question

Quizplus · Accepted Answer

A 1:1 inspiratory/expiratory ratio means that the time spent inhaling is equal to the time spent exhaling. This can impair systemic diastolic pressure more than the other ratios because during inspiration, intrathoracic pressure decreases, which can lead to increased venous return to the heart. However, if the inspiratory phase is prolonged or equal to the expiratory phase, it can disrupt the normal balance and reduce the time for venous return during expiration, potentially lowering diastolic filling and thus diastolic pressure. The other options provide longer expiratory phases, which would less likely impair diastolic pressure to the same extent.

Assuming a Constant Rate of Breathing, Which of the Following