How does higher PEEP affect hemodynamics?

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Study for the Mechanical Vent 2 Exam 2. Prepare with flashcards and multiple-choice questions that include detailed explanations and hints. Ace your exam with confidence!

Multiple Choice

How does higher PEEP affect hemodynamics?

Explanation:
Higher PEEP raises intrathoracic pressure, which impedes venous return to the heart by increasing the pressure in the chest, especially at the right atrium. That lowers preload, which can reduce stroke volume and cardiac output. The result can be a drop in blood pressure if the patient depends on adequate preload to maintain perfusion. While PEEP improves oxygenation by recruiting alveoli, the hemodynamic effect is a trade-off, so BP and perfusion should be monitored after increasing PEEP and managed with fluids or vasopressors or by adjusting PEEP as needed.

Higher PEEP raises intrathoracic pressure, which impedes venous return to the heart by increasing the pressure in the chest, especially at the right atrium. That lowers preload, which can reduce stroke volume and cardiac output. The result can be a drop in blood pressure if the patient depends on adequate preload to maintain perfusion. While PEEP improves oxygenation by recruiting alveoli, the hemodynamic effect is a trade-off, so BP and perfusion should be monitored after increasing PEEP and managed with fluids or vasopressors or by adjusting PEEP as needed.

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