During a patient-ventilator system check the respiratory therapist notices that the pressure-volume loop begins at zero on the x-axis but does not return to zero during expiration. The cause of this is which of the following?
a. Active exhalation
b. Inadequate sensitivity
c. Ventilator circuit leak
d. Decreased compliance
ANS: C
When the loop on a pressure-volume loop does not return to zero during exhalation, there is a leak in the ventilator circuit.
Health Professions
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