The term air-plethysmography is an alternative name for which technique?

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Multiple Choice

The term air-plethysmography is an alternative name for which technique?

Explanation:
Air-plethysmography measures changes in limb volume by detecting air displacement in a sealed chamber around the limb. As blood flows in and out, the limb volume changes and this is converted into a volume curve. Because it relies on tracking actual volume changes to infer blood flow, it is categorized as volume plethysmography. This differs from photoplethysmography, which uses light to sense blood volume in tissue, and from impedance plethysmography, which uses electrical impedance changes. So the term air-plethysmography is an alternative name for volume plethysmography.

Air-plethysmography measures changes in limb volume by detecting air displacement in a sealed chamber around the limb. As blood flows in and out, the limb volume changes and this is converted into a volume curve. Because it relies on tracking actual volume changes to infer blood flow, it is categorized as volume plethysmography. This differs from photoplethysmography, which uses light to sense blood volume in tissue, and from impedance plethysmography, which uses electrical impedance changes. So the term air-plethysmography is an alternative name for volume plethysmography.

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