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Exhibition Label : Nuffield Department of Anaesthetics display (April - August 2008)

Minnitt Gas-Air Apparatus, invented 1936

The Minnitt Gas-Air Apparatus was designed by the obstetrician Dr Robert
Minnitt to administer nitrous oxide to a patient as a way of relieving
pain during childbirth. The machine delivered the mixture of air and nitrous
oxide in standardised proportions, with at least 55% air, and was a
response to the concerns of medical boards regarding the unsupervised
administration of anaesthetics by midwives. The machine was portable
and so was suitable for use in the home as well as hospital, and was only
superseded in the 1950s.

Inv. 10242

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