THE OHMEDA UNIVERSAL PAC DRAWOVER APPARATUS - A TECHNICAL AND CLINICAL-EVALUATION

The Ohmeda Universal PAC drawover apparatus, a modification of an earl ier series of vapour-specific vaporizers, was assessed with regard to its output under varying gas flows and temperatures and its clinical u sage with isoflurane and enflurane. The device tended to over-deliver vapour, particularly at low flows and at high temperatures. Its clinic al performance during spontaneous and positive pressure ventilation wa s satisfactory, although adequate concentrations were not achieved usi ng enflurane in the spontaneous ventilation mode. The device was not a ssessed with ether or halothane. The robust construction, relatively l arge capacity and thermocompensation make it suitable for field or mil itary anaesthesia.