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British Journal of Anaesthesia, 1973, Vol. 45, No. 4 391-393
© 1973 The Board of Management and Trustees of the British Journal of Anaesthesia

other

TWO EARLY ARTIFICIAL VENTILATORS

J. D. WHITBY, M.A., M.B., F.F.A.R.C.S.

Department of Anaesthesia, Newcastle General Hospital Newcastle upon Tyne, NE4 6BE

Two early manually worked artificial ventilators are described. The first, designed by Lewins and described by Dalziel in 1840, was an ancestor of the Drinker machine. It consisted of an airtight box in which the body of the patient was enclosed and to which was attached a large syringe. The second, invented by Marcet in 1854, was a twin-cylinder development of the air pump for intermittent positive and negative pressure ventilation through a nasal or a tracheotomy tube. It produced three phases, inspiration, expiration and a postexpiratory pause. Neither machine achieved any popularity.


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