Plethysmography
Plethysmography
Plethysmography (pronunciation: /plɛθɪzmɒˈɡræfi/) is a medical diagnostic procedure used to measure changes in volume within an organ or the whole body, often in response to physiological activity.
Etymology
The term "plethysmography" is derived from the Greek words "plethysmos" meaning increase, and "graphy" meaning to write or record.
Procedure
Plethysmography involves the use of a Plethysmograph which can be a device that measures changes in volume within an organ or the whole body. The procedure is non-invasive and can be used to assess the function of the lung, heart, and blood vessels, among other organs.
Types
There are several types of plethysmography, including:
- Impedance plethysmography: This type measures changes in electrical impedance to assess blood flow.
- Optical plethysmography: This type uses light to measure changes in blood volume.
- Body plethysmography: This type measures changes in the volume of the entire body.
Related Terms
- Spirometry: A common pulmonary function test that measures the volume of air that can be inhaled and exhaled.
- Pulse oximetry: A non-invasive method used to monitor a person's oxygen saturation.
See Also
External links
- Medical encyclopedia article on Plethysmography
- Wikipedia's article - Plethysmography
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