Patients undergoing positive expiratory pressure therapy must have a high enough expiratory flow to generate pressure in the range of _____ cm H2O
a. 5 to 10 c. 20 to 25
b. 10 to 20 d. 25 to 30
ANS: B
A patient undergoing positive expiratory pressure therapy must be able to generate expiratory flows high enough to maintain expiratory pressure at 10 to 20 cm H2O.
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