Mini Vent
Invented as a simple, compact ventilator by Anaesthetist Dr Anthony D Cohen, of Johannesburg, South Africa, and described in 1966. Powered by the distended reservoir bag of the breathing circuit, there is just one moving part, and just two screw adjustments. Weighing under 115gm, and measuring 7.5cm by 5cm, it was manufactured by the Acme Instrument Co. in S.A.

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