plethysmography

plethysmography
Measuring and recording changes in volume of an organ or other part of the body by a plethysmograph. [G. plethysmos, increase, + graphe, a writing]
- impedance p. recording changes in electrical impedance between electrodes placed on opposite sides of a part of the body, as a measure of volume changes in the path of the current. SYN: dielectrography.
- venous occlusion p. measurement of the rate of arterial inflow into an organ or limb segment by measuring its initial rate of increase in volume when its venous outflow is suddenly occluded.

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pleth·ys·mog·ra·phy .pleth-iz-'mäg-rə-fē n, pl -phies the use of the plethysmograph: examination by plethysmograph

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n.
the process of recording the changes in the volume of a limb caused by alterations in blood pressure. The limb is inserted into a fluid-filled watertight casing (oncometer) and the pressure variations in the fluid are recorded.

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pleth·ys·mog·ra·phy (pleth″iz-mogґrə-fe) the recording of the changes in the size of a part, particularly as modified by the circulation of the blood in it. Called also pulse volume recording.

Medical dictionary. 2011.

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Look at other dictionaries:

  • Plethysmography — Pleth ys*mog ra*phy, n. (Physiol.) The study, by means of the plethysmograph, of the variations in size of a limb, and hence of its blood supply. [1913 Webster] …   The Collaborative International Dictionary of English

  • plethysmography — noun see plethysmograph …   New Collegiate Dictionary

  • plethysmography — See plethysmographic. * * * …   Universalium

  • plethysmography — noun The diagnostic use of a plethysmograph …   Wiktionary

  • plethysmography — pleth·ys·mog·ra·phy …   English syllables

  • plethysmography — n. the process of recording the changes in the volume of a limb caused by alterations in blood pressure. The limb is inserted into a fluid filled watertight casing (oncometer) and the pressure variations in the fluid are recorded …   The new mediacal dictionary

  • plethysmography — ˌplethə̇zˈmägrəfē, thə̇sˈ noun ( es) : the use of the plethysmograph : examination by plethysmograph …   Useful english dictionary

  • Body plethysmography — is a very sensitive lung measurement used to detect lung pathology that might be missed with conventional pulmonary function tests. This method of obtaining the absolute volume of air within one s lungs may be also be used in situations where… …   Wikipedia

  • Optoelectronic plethysmography — is a method to evaluate ventilation through an external measurement of the chest wall surface motion. This method has been developed at the Bioengineering Department of the Politecnico di Milano university. A number of small reflective markers… …   Wikipedia

  • air plethysmography — air cuff plethysmography a technique for measuring venous hemodynamics, usually in the legs: with the patient supine with lower limbs elevated, a pneumatic cuff attached to a recording device is applied to the limb; volume changes are recorded… …   Medical dictionary

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