In intubated patients, what do sources of increased imposed work of breathing include? 1. Endotracheal tube 2. Ventilator circuit 3. Auto-PEEP
a. 1 and 2 only
b. 1 and 3 only
c. 2 and 3 only
d. 1, 2, and 3
ANS: D
In intubated patients, sources of imposed work of breathing include the endotracheal tube, ven-tilator circuit, and auto-PEEP due to dynamic hyperinflation with airflow obstruction, as is commonly seen in the patient with COPD.
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