ISSN:
1435-604X
Keywords:
Skin ablation
;
CO2 short pulses
;
Heat conduction
;
Resurfacing
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
,
Physics
,
Technology
Notes:
Abstract Modern CO2 systems can be programmed to emit high power density short pulses to produce instantaneous conversion of cutaneous tissue to a gaseous state. Tissue ablation occurs so quickly that there is minimal thermal conduction to the adjacent structures. The limits of thermal injury can be minimized to the order of only 50Μ thick and, in spite of the limited effects of heat conduction, coagulation in vessels can be obtained as well, since small blood vessels are immediately sealed by the laser. Collimated handpieces deliver a fixed beam diameter for more uniform vaporization at a constant energy density, as the handpiece is steadily moved over lesions situated on uneven facial contours. The fluence used is about 250 mJ for a 3 mm spot size and these parameters can be used for clean, repeatable and predictable ablation of tissue, taking advantage of the concept of the known thermal relaxation time of soft tissue.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02133621
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