A Silver Lining: Anaesthesia During the First World War

Gwathmey Apparatus

Gwathmey Apparatus

Gwathmey developed this apparatus while with the American Red Cross. It has yokes for two cylinders of nitrous oxide and one of oxygen. It is controlled by a needle valve and tubes take gases to the bottle cap.

Marshall nitrous oxide oxygen ether apparatus

Marshall nitrous oxide oxygen ether apparatus

Geoffrey Marshall developed an anaesthetic apparatus based on a machine designed by Gwathmey. It gave gas, oxygen and ether and had flowmeters. It became the standard model in Royal Army Medical Corps practice.

Boyle apparatus

Boyle apparatus

This is Boyle’s original nitrous oxide/oxygen/ether apparatus which closely resembled those of Gwathmey and Marshall. British gas cylinders would not easily fit Gwathmey’s apparatus and so Boyle modified it to produce this machine.

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