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Proceedings Paper

Preliminary report on the use of a carbon dioxide laser for palmar digital neurectomy in the horse
Author(s): George M. Peavy; Lih-Huei L. Liaw; A. T. Fischer; John Wesley Williams; Richard Pankowski; Michael W. Berns
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Paper Abstract

Digital nerve samples obtained from horses using a CO2 laser for surgical excision at various power densities in both continuous wave (CW) and superpulse (SP) modes were examined histologically and using a scanning electron microscope. Preliminary data suggest that the lowest power density examined (637 W/cm2) in CW mode provided a wide zone of thermal change and the best tissue coagulation. Power densities of 15,924 and 31,847 W/cm2 SP mode showed a narrower zone of thermal change, and a coagulated but much more disrupted excisional surface than that which was observed at lower power densities, or at the same power densities where CW mode was used. Clinical trials where equine palmer digital neurectomies have been done at 637 W/cm2 (5 W, 1.0 mm spot size) CW and at 47,771 W/cm2 (15 W, 0.2 mm spot size) SP have not been completed at this time. It has been observed that attempting the surgical procedure at 127,388 W/cm2 (40 W, 0.2 mm spot size) CW was difficult for the surgeon to control and resulted in marked post surgical discomfort of the patient. For these reasons we eliminated power densities above 63,694 (20 W, 0.2 mm spot size) from our neurectomy studies.

Paper Details

Date Published: 1 June 1992
PDF: 5 pages
Proc. SPIE 1643, Laser Surgery: Advanced Characterization, Therapeutics, and Systems III, (1 June 1992); doi: 10.1117/12.137334
Show Author Affiliations
George M. Peavy, Beckman Laser Institute and Medical Clinic (United States)
Lih-Huei L. Liaw, Beckman Laser Institute and Medical Clinic (United States)
A. T. Fischer, Beckman Laser Institute and Medical Clinic (United States)
John Wesley Williams, Beckman Laser Institute and Medical Clinic (United States)
Richard Pankowski, Beckman Laser Institute and Medical Clinic (United States)
Michael W. Berns, Beckman Laser Institute and Medical Clinic (United States)


Published in SPIE Proceedings Vol. 1643:
Laser Surgery: Advanced Characterization, Therapeutics, and Systems III
R. Rox Anderson, Editor(s)

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