Responsibilities Certified Respiratory Therapist (CRT) monitors and weans Oxygen Therapy and artificial ventilation. The CRT draws, analyzes, and reports Arterial Blood Gases and EKG tests. CRT job responsibilities include, but are not limited to: Deliver intermittent therapy and assist with changing of artificial airways. Perform routine and advanced therapeutic procedures according to established policy and procedure and CPR and bag-mask ventilation. CRT operates, maintains, and repairs respiratory equipment to ensure proper static functioning, cleanliness, and operation. Shift: AM or PM