Low thermal damage cutting of tissue using high irradiance CW CO2 laser radiation

Joseph T. Walsh, Kevin T. Schomacher, Thomas J. Flotte, Thomas F. Deutsch, Michael S. Feld

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Tissue cutting experiments were performed using freshly harvested guinea pig skin and bovine cornea and high-irradiance CW CO2 laser radiation. The object is to minimize the damage by having the velocity of the ablation front exceed the velocity of the advancing thermal wave. The irradiance was varied from 0.2 to 800 kW/cm2. Both isolated holes and linear incisions were made. Grossly, black char was seen only at irradiances of <6 kW/cm2; in skin a slight brown discoloration of the otherwise white tissue was noted at higher irradiances. Histologically, the zone of damage was typically 100 ± 15 μm in width at irradiances of >13 kW/cm2. Mass-loss measurements indicate a heat of ablation of 4.8 kJ/cm3 and show a dependence of the heat ablation on spot size. The results indicate that the thermal damage produced by existing clinical CO2 lasers can be reduced to ~100 μm by using high-irradiance radiation.

Original languageEnglish (US)
Title of host publicationCONFERENCE ON LASERS AND ELECTRO-0PTICS
Editors Anon
PublisherPubl by IEEE
Pages128, 130
ISBN (Print)1557520860
StatePublished - 1989
Externally publishedYes
EventSummaries of Papers Presented at the Conference on Lasers and Electro-Optics - Baltimore, MD, USA
Duration: Apr 24 1989Apr 28 1989

Publication series

NameCONFERENCE ON LASERS AND ELECTRO-0PTICS

Other

OtherSummaries of Papers Presented at the Conference on Lasers and Electro-Optics
CityBaltimore, MD, USA
Period4/24/894/28/89

ASJC Scopus subject areas

  • Engineering(all)

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