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Plethysmographic Waveform Devices
Journal for Vascular Ultrasound, 2011Plethysmography is a noninvasive technique which measures volume changes. Common instruments include pneumatic or air plethysmographs and photoplethysmographs. These are used in the vascular laboratory to examine both arterial and venous blood flow.
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The stuttering moment: A plethysmographic study
Journal of Communication Disorders, 1973Abstract Digital blood volume or vasoconstriction was investigated at the moment of stuttering by means of a plethysmograph, a device which may be used to measure vasoconstriction resulting from autonomic nervous system functioning. Ten adult stutters and ten matched controls were used. The subjects viewed one of 50 words for 30 sec (approach period),
W K, Ickes, S, Pierce
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A new sensitive portable plethysmograph
American Heart Journal, 1947Abstract A new portable plethysmograph is described which is all metal and, therefore, sturdy and free from the difficulties of deterioration—an important problem when rubber membranes are employed. A device for standardization is incorporated which makes it possible to correct for finger and toe size, thereby resulting in a completed plethysmogram ...
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A practical ultrasonic plethysmograph.
Aviation, space, and environmental medicine, 1982An ultrasonic plethysmograph, which gives improved performance over the standard Whitney Strain Gauge, is described. This instrument monitors dimension changes in human limbs by measuring the transit times of acoustic pulses across two chords of the limb.
V C, Wu, W T, Nickell, P K, Bhagat
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