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Medical Museum: Sphygmograph

by Sean Ruck , Contributing Editor
From the March 2017 issue of DOTmed HealthCare Business News magazine

Each month, we visit Dr. Blaufox’s Museum of Historical Medical Artifacts to take a look back at the medical equipment that cleared the way for what patients encounter in doctors’ offices and operating rooms of today. Some equipment may be recognizable, while other featured inventions have since become obsolete or have had their usefulness discredited. The picture and description appear courtesy of Dr. M. Donald Blaufox, M.D., Ph.D., from his website:

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Category: Sphygmograph
Estimated Date: 1900
Name: MacKenzie-Lewis Polygraph
Manufacturer: Cambridge and Paul Instrument Co. Ltd.
Description: An 8 5/8” x 5 1/8” x 4 5/8” mahogany box opens to reveal lid with instructions. The machine is mounted in the base. There is a windup drive with a speed regulator and paper feed, which has a numbered edge on the paper for reference. A bottle of ink is also mounted on the base and there are two pens attached to diaphragms. There are two sensors for venous tracings. The sensor for arterial tracing is missing. Rubber tubing is present. Serial number L 9348.


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