| plethysmography | <physiology> The study, by means of the plethysmograph, of the variations in size of a limb, and hence of its blood supply. Source: Websters Dictionary (01 Mar 1998) |
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| plethysmography, impedance | 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. (12 Dec 1998) |
| plethysmography, whole body | Measurement of the volume of gas in the lungs, including that which is trapped in poorly communicating air spaces. It is of particular use in chronic obstructive pulmonary disease and emphysema. (12 Dec 1998) |
| arterial plethysmography | <investigation, procedure> A test which measures the systolic blood pressure of a normal extremity compared to an upper extremity. The test is usually used to detect arterial blockage in the lower extremities. There should be less than 20 mm of Hg difference in systolic blood pressure between the upper and lower extremities. More than this can indicate arterial occlusive disease or arterial blockage. (17 Oct 1997) |
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