Marey sphygmograph, 1866-1900.

Image number: 10284277

Marey sphygmograph, 1866-1900.

Made by Breguet, Paris. The sphygmograph traces an undulating line, which represents a record of blood pressure and pulse over time. The first practical, portable version was devised in 1860 by the French physician Etienne-Jules Marey (1830-1904) and was strapped to the wrist. This one has a lever, which rests on the radial artery in the wrist while the other end scratches the trace on to smoked paper. The paper moved at a uniform rate due to the presence of a clockwork mechanism.

Image number:
10284277
Credit:
Science Museum/Science & Society Picture Library
Date taken:
20 October 2003 12:31
Image rights:
Science Museum
 

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