Intermittent breaths by mouthpiece with a pressure-cycled ventilator are being administered to a patient who is post bariatric surgery. The respiratory therapist notices the ventilator cycles into exhalation immediately after the inhalation phase begins, causing a rapid cycle of the machine. Which of the following could be the cause?
A. excessive inspiratory pressure settings
B. occlusion of the mouthpiece
C. faulty air-entrainment valve
D. inadequate flow rate
Answer: B. occlusion of the mouthpiece
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