plethysmograph

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plethysmograph

[plə′thiz·mə‚graf]
(medicine)
An instrument for measuring changes in the size of a part of the body by measuring changes in the amount of blood in that part.
References in periodicals archive ?
In this month's Anesthesia and Analgesia Journal, a clinical study titled, "Does the Pleth Variability Index (PVI) Indicate the Respiratory-Induced Variation in the Plethysmogram and Arterial Pressure Waveforms?