photoelectric plethysmograph

photoelectric plethysmograph

[¦fōd·ō·i′lek·trik plə′thiz·mə‚graf]
(medicine)
A medical instrument for measuring and recording ear opacity by means of a tiny phototube and lamp clipped to the ear, as a measure of the state of fullness of blood vessels; also worn by aircraft pilots during high-altitude flights, as an alarm indicating the need for more oxygen.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
A short description of operation of the photoelectric plethysmograph has been provided by Challoner and Ramsay.
A photoelectric plethysmograph for the measurement of cutaneous blood flow.
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