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 (plĕ-thĭz′mə-grăf′, plə-)
An instrument that measures variations in the size of an organ or body part on the basis of the amount of blood passing through or present in the part.

[Greek plēthusmos, increase (from plēthūnein, to increase, from plēthūs, quantity, from plēthein, to be full; see pelə- in Indo-European roots) + -graph.]

ple·thys′mo·graph′ic adj.
pleth′ys·mog′ra·phy (plĕth′ĭz-mŏg′rə-fē) n.


(pləˈθɪzməˌɡrɑːf; -ˌɡræf; -ˈθɪs-)
(Physiology) physiol a device for measuring the fluctuations in volume of a bodily organ or part, such as those caused by variations in the amount of blood it contains
[C19: from Greek plēthusmos enlargement + graphein to write]


(pləˈθɪz məˌgræf, -ˌgrɑf)

a device for measuring and recording changes in the volume of the body or of a body part or organ.
[1870–75; < Greek plēthysm(ós) increase, multiplication (plēthý(nein) to increase, derivative of plêthos large number, crowd + -smos, variant of -mos n. suffix) + -o- + -graph; first coined in Italian as pletismografo]
ple•thys`mo•graph′ic (-ˈgræf ɪk) adj.
pleth•ys•mog•ra•phy (ˌplɛθ ɪzˈmɒg rə fi) n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.plethysmograph - a measuring instrument for measuring changes in volume of a part or organ or whole body (usually resulting from fluctuations in the amount of blood it contains)
body plethysmograph - plethysmograph consisting of a chamber surrounding the entire body; used in studies of respiration
digital plethysmograph - plethysmograph applied to a digit of the hand or foot to measure skin blood flow
measuring device, measuring instrument, measuring system - instrument that shows the extent or amount or quantity or degree of something
References in periodicals archive ?
During the plethysmographic assessment, participants were seated in a straight back stationary armchair.
Photo plethysmographic signal processing using adaptive sum comb filter for pulse delay measurement.
The investigators performed lung function assessment, which included forced spirometry, inspiratory capacity, maximal voluntary ventilation, plethysmographic lung volumes, carbon monoxide transfer coefficient, arterial blood gases, and PEmax.
Blood pressure and heart rate were measured using the Tail-cuff method which utilizes a plethysmographic sphyigmomanometer (BP-98A, Softron, Tokyo) and allows for measurements to be carried out without the need for anesthetic.
Basic vital signs monitor tft 10 "a colo, basic parameters: ekg, respiration, temperature, surva oxygen saturation with pulse plethysmographic e indication and non-invasive blood pressure, physical resources connection for,fetal monitor, lightweight and portable, dimensions 350mm x 30mm x 104mm, weight: 3kg approximately 506 folding screen "tft lcd color with 640 x 480 resolution easy to read and operate, deployment of waves and large numbers in three different modes
Plethysmographic estimation of thoracic gas volume in apneic mice.
Classification of child molesters by plethysmographic assessment of sexual arousal and a self-report measure of sexual preference.
Pleth variability Index to Monitor the Respiratory Variations in the Pulse Oximeter Plethysmographic Waveform Amplitude and Predict Fluid Responsiveness in the Operating Theatre.
Further research clarifying which thoracic landmarks influence the precision of respiratory inductive plethysmographic data may improve the accuracy of this variable, without losing the multi-functionality, unobtrusive (i.
There is also an extensive literature using phallometric data or plethysmographic responses (actual genital arousal) to sexually coercive stimuli.
The finger pulse waveform length represents the sum of all absolute plethysmographic changes during a determined time window; it integrates information of heart rate and pulse amplitude (Elaad & Ben-Shakhar, 2006).