A patient is receiving controlled ventilation via a IPPB ven…
A patient is receiving controlled ventilation via a IPPB ventilator (Bird Mark 7). Suddenly, the ventilator will not cycle into expiration, this problem may be caused by: 1. Development of a spontaneous pneumothorax 2. Disconnected expiratory valve 3. A hole in the cuff of the ETT 4. A leak in the patient tubing