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Journal of Biomedical Optics • Open Access

Respiration-induced changes in tissue blood volume distal to occluded artery, measured by photoplethysmography
Author(s): Meir Nitzan; Igor Faib; Haim Friedman

Paper Abstract

Photoplethysmography (PPG) measures the cardiac-induced fluctuations and other changes in tissue blood volume by light transmission measurement. In the current study, light transmission was simultaneously measured in the two index fingers of healthy subjects, while the brachial artery in the left arm was occluded by a pressure cuff, so that no PPG signal appeared in the left finger. Correlated respiratory-induced changes in the PPG baseline in the right hand and in the light transmission in the left hand were found, indicating respiratory-induced blood volume changes in the finger distal to the occluded artery. The blood volume changes under the PPG probe distal to the occluded artery are interpreted as transition of blood volume from small arteries into big veins, mediated by the sympathetic nervous system.

Paper Details

Date Published: 1 July 2006
PDF: 3 pages
J. Biomed. Opt. 11(4) 040506 doi: 10.1117/1.2236285
Published in: Journal of Biomedical Optics Volume 11, Issue 4
Show Author Affiliations
Meir Nitzan, Jerusalem College of Technology (Israel)
Igor Faib, Jerusalem College of Technology (Israel)
Haim Friedman, Jerusalem College of Technology (Israel)


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