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Proceedings Paper

Vascular anastomosis using a 1.9-um laser
Author(s): Robert B. Stewart; D. T. Zelt; Glenn M. LaMuraglia; Robert T.V. Kung
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Paper Abstract

A 1.9 micrometers laser is used to weld small diameter vessels. The absorption characteristic of tissues at this wavelength renders this laser suitable for welding of vessels with diameters in the 1 to 3 mm range. The appropriate laser power range for welding is 120 to 200 mW with a fluence on target of approximately 100 J/cm2. For vessel wall thicknesses matching the optical absorption depth, measured burst pressure was approximately 400 mmHg. In this case the acute weld strength is greater than 3 X 106 dynes/cm2. Anastomotic compliance of the welded zone was a factor of two lower than native vessel tissue both immediately following welding and after 10 weeks of healing. The advantages offered by this laser wavelength are convenient energy delivery via fiber optics, no irrigation needed for tissue cooling, and applicability to small vessel anastomoses.

Paper Details

Date Published: 1 July 1993
PDF: 8 pages
Proc. SPIE 1876, Lasers in Otolaryngology, Dermatology, and Tissue Welding, (1 July 1993); doi: 10.1117/12.147031
Show Author Affiliations
Robert B. Stewart, Abiomed, Inc. (United States)
D. T. Zelt, Massachusetts General Hospital (United States)
Glenn M. LaMuraglia, Massachusetts General Hospital (United States)
Robert T.V. Kung, Abiomed, Inc. (United States)


Published in SPIE Proceedings Vol. 1876:
Lasers in Otolaryngology, Dermatology, and Tissue Welding
R. Rox Anderson; Lawrence S. Bass; Stanley M. Shapshay; John V. White; Rodney A. White, Editor(s)

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