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Proceedings Paper

Comparison Of Percutaneous Laser Discectomy With Other Modalities For The Treatment Of Herniated Lumbar Discs And Cadaveric Studies Of Percutaneous Laser Discectomy
Author(s): W. Edward Johansen; Chadwick F. Smith; Thomas Vangsness; Emmett T. McEleney; Ken Yamaguchi; Peter Bales
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Paper Abstract

Current modalities for treating a herniated lumbar disc include standard open discectomy, microsurgical discectomy, chemonucleoysis and percutaneous discectomy. The Food and Drug Administration has not yet approved percutaneous laser discectomy for clinical investigation. The investigators believe that percutaneous laser discectomy combines the efficacy of both chemonucleoysis and percutaneous discectomy with the safety of both open standard discectomy and microsurgical discectomy. The investigators removed two lumbar discs from a cadaveric spine and weighed each of them. The two lumbar discs weighed in the range of 13.654 grams and 15.713 grams, respectively. The investigators initiated several series of 10 firing cycles from a surgical carbon dioxide laser system. In each firing cycle the surgical carbon dioxide laser system delivered a beam of light energy having an output power of 18.0 watts at pulse duration of 0.045 second at the rate of 15 pulses per second for a period of 6 seconds and vaporized approximately 325 milligrams of disc material. Based on the findings of other investigators reported in the literature relating to percutaneous discectomy the investigators postulated that 10 to 20 firing cycles are required to vaporize 30 to 40% (2.4 to 6.4 grams) of the disc material. The investigators initiated two series of 10 firing cycles in order to perform laser discectomy in a third lumbar disc of the cadaveric spine in situ. The investigators harvested and then bisected the laser-treated third lumbar disc for gross review. Their gross findings indicated a high probability of success For percutaneous laser discectomy.

Paper Details

Date Published: 10 March 1987
PDF: 6 pages
Proc. SPIE 0712, Lasers in Medicine, (10 March 1987); doi: 10.1117/12.937346
Show Author Affiliations
W. Edward Johansen
Chadwick F. Smith
Thomas Vangsness
Emmett T. McEleney
Ken Yamaguchi
Peter Bales


Published in SPIE Proceedings Vol. 0712:
Lasers in Medicine
Stephen N. Joffe; John A. Parrish, Editor(s)

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