In general, chest physical therapy can be expected to improve airway clearance when a patient's sputum production exceeds what volume?
a. 30 ml/day
b. 20 ml/day
c. 15 ml/day
d. 10 ml/day
ANS: A
In general, sputum production must exceed 25 to 30 ml/day for airway clearance therapy to sig-nificantly improve secretion removal.
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