Laser welding system

Details Laser welding system Laser welding system

1994-09-28

1997-09-02

Cohen, Lee S.

Surgery

Instruments

Light application

606 8, 606 9, 606 11, A61B 1732, A61N 506

Patent

active

056626436

ABSTRACT:
A laser welding apparatus and system for surgically bonding tissue together provides a beam of coherent light at a wavelength corresponding to a specific tissue thickness at which full absorption of the laser energy occurs, and adjusts the energy of the laser beam in response to tissue temperature throughout the tissue thickness to prevent the tissue temperature from either exceeding a predetermined limit or varying outside a predetermined range. Preferably, the coherent light beam has a center wavelength of 1.9 .mu.m, and is variable between 1.85 and 1.91 .mu.m.

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Popp et al. (1989), "Welding of Gallbladder Tissue With A Pulsed 2.15 .mu.m Thulium-Holmium-Chromium: YAG Laser", Lasers in Surgery and Medicine, vol. 9, pp. 155-159.
Zelt et al. (1991), "Arterial Laser Welding With A 1.9 Micrometer Raman-Shifted Laser", Journ. of Vascular Surgery, vol. 15, pp. 1025-1030.
Springer et al. (1993), "Temperature Control During Laser Vessel Welding", Applied Optics, vol. 32, pp. 517-525.
Anderson et al. (1993), "Lasers in Otolaryngology, Dermatology, And Tissue Welding", SPIE, vol. 1876, pp. 202-209.
Kung et al. (1993), "Absorption Chracteristics at 1.9 .mu.m: Effect On Vascular Welding", Lasers in Sugery and Medicine, vol. 13, pp. 12-17.

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