✦ LIBER ✦

Pulsed carbon dioxide laser ablation of burned skin: In vitro and in vivo analysis

✍ Scribed by Howard A. Green; Yacov Domankevitz; Norman S. Nishioka

Publisher: John Wiley and Sons
Year: 1990
Tongue: English
Weight: 932 KB
Volume: 10
Category: Article
ISSN: 0196-8092
DOI: 10.1002/lsm.1900100513

No coin nor oath required. For personal study only.

✦ Synopsis

Pulsed lasers produce efficient and precise tissue ablation with limited residual thermal damage. In this study, the efficiency of pulsed COz laser ablation of burned and normal swine skin was studied in vitro with a mass loss technique. The heats of ablation for normal and burned skin were 2,706 and 2,416 J/cm3 of tissue ablated, respectively. The mean threshold radiant exposures for ablating normal skin and eschar were 2.6 J/cm2 and 3.0 J/cm2, respectively. Radiant exposures greater than 19 J/cm2 produced a plasma, which decreased the efficiency of laser ablation. Thus the radiant exposures for efficient ablation range from 4 to 19 J/cm2, and within this radiant exposure range 20-40 pm of tissue are ablated per pulse. We also examined, on a gross and histopathologic basis, in vivo burn eschar excision with a pulsed CO, laser. The laser allowed bloodless excisions of full thickness burns on the backs of male hairless rats. The zone of thermal damage was approximately 85 pm over the subjacent fascia. The pulsed COz laser can ablate burn eschar efficiently, precisely, and bloodlessly and may prove valuable for the excision of burned and necrotic tissue.

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