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Proceedings Paper

Mechanical behavior of cartilage during laser irradiation
Author(s): Sergio H. Diaz-Valdes; Enrique J. Lavernia; Brian Jet-Fei Wong M.D.
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Paper Abstract

Internal stress σ(t), diffuse transmitted light intensity I(t) from a He-Ne probe laser (λ= 632.8 nm), and radiometric surface temperature Ts(t) were measured during the photothermal heating of porcine septal cartilage using a pulsed Nd:YAG laser (λ= 1.32 μm). Rectangular specimens, 1-4 mm thick, were secured to a tensile force testing rig and laser irradiated. Force measurements during heating showed significant variation in the rate of deformation, which were found to be strong dependent on tissue orientation; revealing the anisotropic nature of its thermo-mechanical properties. These finding suggest that the collagen and proeoglycan networks lie in a preferential orientation within the extracellular matrix, which must be addressed before this procedure can be used on a wider basis.

Paper Details

Date Published: 9 July 2001
PDF: 6 pages
Proc. SPIE 4257, Laser-Tissue Interaction XII: Photochemical, Photothermal, and Photomechanical, (9 July 2001); doi: 10.1117/12.434740
Show Author Affiliations
Sergio H. Diaz-Valdes, Beckman Laser Institute and Medical Clinic (United States)
Enrique J. Lavernia, Univ. of California/Irvine (United States)
Brian Jet-Fei Wong M.D., Beckman Laser Institute and Medical Clinic (United States)

Published in SPIE Proceedings Vol. 4257:
Laser-Tissue Interaction XII: Photochemical, Photothermal, and Photomechanical
Donald Dean Duncan; Donald Dean Duncan; Steven L. Jacques; Peter C. Johnson; Peter C. Johnson, Editor(s)

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