Table 2.

 Oxygen consumption and endurance of original pneumatic ventilator for adverse environments (design i) and a conventional commercial pneumatic ventilator under different conditions.

Ventilator	Tidal volume; ml	Compliance; ml.cmH2 o −1	Rate; breaths.min−1	Endurance of standard 340‐l D cylinder	Oxygen consumption; l.min−1
Test ventilator	800	60	10	5 h 0 min	1.13
Oxylog	800	60	10	1 h 34 min	3.62
Test ventilator	800	40	10	4 h 27 min	1.27
Oxylog	800	40	10	1 h 32 min	3.70
Test ventilator	650	60	10	5 h 47 min	0.98
Oxylog	650	60	10	1 h 50 min	3.09
Test ventilator	650	40	10	5 h 50 min	0.97
Oxylog	650	40	10	1 h 55 min	2.96