How does peak end-expiratory pressure (PEEP) assist a ventilated patient?
a. It provides positive pressure on expiration to keep small airways open.
b. It provides positive pressure on inspiration and expiration to increase oxygenation.
c. It delivers a breath in a set pattern regardless of the patient's respiratory pattern.
d. It delivers a breath only if the patient does not breathe spontaneously.
ANS: A
PEEP provides positive pressure on expiration to help keep small airways open. It does not provide pressure on inspiration. C and D refer to respiratory patterns, not pressure.
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