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Proceedings Paper

Laser tissue welding and repair of digital flexor tendons
Author(s): P. J. Drew; Michael N. Kiernan; A. D. MacGregor; Marc Clement
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Paper Abstract

Injuries involving division of the flexor tendons of the hand are a common surgical problem. Sutured repairs must be strong enough to withstand early active movement. Experiments were designed to assess the strength of bonds formed between tendon sections as a result of heating (1) under controlled conditions in a water bath and (2) using a carbon dioxide laser (laser tissue welding). The load (N) and stress (N/cm2) required to disrupt thermal bonds between bovine tendon sections heated for 4 minutes in water peaked at 62 degrees Celsius (13N, 11.3N/cm2). Further experiments revealed the optimal time period for heating to be 9 minutes (21.5N, 20.6N/cm2). A threshold effect was apparent at these parameters. The in vitro strength of sutured, laser welded and sutured and laser welded tendon repairs was compared in a rabbit model. Laser welding alone did not produce repairs as strong as sutured repairs. It did, however, augment the strength of sutured repair. This effect was maximal at a power of 0.1 W.

Paper Details

Date Published: 19 January 1996
PDF: 11 pages
Proc. SPIE 2623, Medical Applications of Lasers III, (19 January 1996); doi: 10.1117/12.230354
Show Author Affiliations
P. J. Drew, Morriston Hospital (United Kingdom)
Michael N. Kiernan, Swansea Institute of Higher Education (United Kingdom)
A. D. MacGregor, Morriston Hospital (United Kingdom)
Marc Clement, Swansea Institute of Higher Education (United Kingdom)

Published in SPIE Proceedings Vol. 2623:
Medical Applications of Lasers III
Stephen G. Bown; Herbert J. Geschwind; Raimund Hibst; Frederic Laffitte; Giulio Maira; Roberto Pini; Hans-Dieter Reidenbach; Hans H. Scherer; Pasquale Spinelli, Editor(s)

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