Hypoxemia during FB on a mechanically ventilated patient is typically due to:
a. inappropriately set alarms.
b. equipment failure.
c. loss of lung volume.
d. bronchospasm.
ANS: C
Hypoxemia during FB on mechanically ventilated patients is related to several factors, including loss of lung volume during suctioning, particularly if tidal volume delivery also is compromised. It occurs more frequently in those with acute respiratory distress syndrome and in those insuffi-ciently sedated.
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