PEEP & CPAP (Exam 1) Study Guide.
PEEP - answerrecruits a certain number of collapsed alveoli
increases FRC & increases compliance in the dependent are (lower lobe) of lung
*compliance decreases in the non-dependent (upper lobe) area of the lung due to overdistention
Indications of PEEP - answe...
is PaO2 still <60: then start to increase PEEP by 3-5 until:
1. acceptable oxygenation achieved
2. unacceptable side effects occur:
decreased compliance
decreased cardiac function
barotrauma
Levels of PEEP - answer✔Minimum "physiologic" 3-5
moderate 5-15
maximum >15
Optimal - PEEP level which achieves maximum benefits with least side effects
Physiologic Effects of PEEP on: - answer✔PaO2 - up
FRC - up
PaCO2 - down
BP - down
PvO2 - improves
Intrapulmonary shunt - down
Cardiac output - down
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