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Proceedings Paper

Microvessel reactivity changes in light-diode irradiation of blood (470 to 980 nm)
Author(s): Nikolai N. Petrishchev; Ludmila I. Yantareva
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Paper Abstract

The effects of distant light diode irradiation with various spectrums of the trunk vessels on reactivity of microvessels in the small intestine mesentery treated with threshold doses of norepinephrine (NoE) are compared. The character of changes in reactivity of microvessels to NoE was found to depend on the wave length and irradiation dose. Ultraviolet irradiation (470 nm, 0.03 J/sm2) was noticed to increase reactivity of the vessels to NoE (vasoconstriction increase). In green light irradiation (540 nm, 0.3 J/sm2 sm2) no changes in reactivity were observed. Red light irradiation (670 nm, 2.0 J/sm2), infrared particular (980 nm, 1.0 J/sm2), lowered reactivity to NoE. Thus, noninvasive light-diode irradiation of the blood results in different systemic changes of endothelial dependent reactivity of microcirculation due to specify of photochemical processes involved.

Paper Details

Date Published: 14 January 1998
PDF: 6 pages
Proc. SPIE 3195, Laser-Tissue Interaction, Tissue Optics, and Laser Welding III, (14 January 1998); doi: 10.1117/12.297893
Show Author Affiliations
Nikolai N. Petrishchev, St. Petersburg State Pavlov Medical Univ. (Russia)
Ludmila I. Yantareva, St. Petersburg State Pavlov Medical Univ. (Russia)

Published in SPIE Proceedings Vol. 3195:
Laser-Tissue Interaction, Tissue Optics, and Laser Welding III
Guy P. Delacretaz; Guilhem Godlewski M.D.; Roberto Pini; Rudolf W. Steiner; Lars Othar Svaasand, Editor(s)

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