DocumentCode :
884481
Title :
Pulsed CO/sub 2/ laser ablation of tissue: effect of mechanical properties
Author :
Walsh, Joseph T., Jr. ; Deutsch, Thomas F.
Author_Institution :
Massachusetts Gen. Hospital, Boston, MA, USA
Volume :
36
Issue :
12
fYear :
1989
Firstpage :
1195
Lastpage :
1201
Abstract :
The ablation rate of guinea pig skin and bovine aorta, myocardium, and liver by a CO 2 laser emitting 2- mu s-long pulses was quantified. Ablation efficiency was found to be strongly dependent on the ultimate tensile strength of the tissue; the ablation efficiency of liver is seven times that of skin. Gluteraldehyde cross linking of skin, which is known to greatly increase tissue stiffness but not significantly affect ultimate tensile strength, did not change the ablation rate. The water content of the tissues, which largely determines the optical and thermal properties, was measured and found to vary only slightly. The results demonstrate that tissue mechanical properties are important in the interpretation and modeling of pulsed laser ablation of tissue and that variations in these mechanical properties can lead to drastically different cutting rates for different tissues.
Keywords :
biological effects of laser radiation; biomechanics; carbon compounds; gas lasers; liver; optical variables measurement; skin; tensile strength; thermal variables measurement; 2 mus; CO/sub 2/ laser ablation; ablation efficiency; ablation rate; bovine aorta; cross linking; cutting rates; gluteraldehyde; guinea pig skin; liver; mechanical properties; myocardium; optical properties; pulsed laser ablation; pulsed lasing; thermal properties; tissue; tissue mechanical properties; tissue stiffness; tissue water; ultimate tensile strength; water content; Bovine; Joining processes; Laser ablation; Laser beam cutting; Liver; Mechanical factors; Myocardium; Optical pulses; Skin; Water; Animals; Aorta, Thoracic; Body Water; Cardiac Surgical Procedures; Cattle; Elasticity; Guinea Pigs; Laser Therapy; Liver; Myocardium; Skin; Tensile Strength;
fLanguage :
English
Journal_Title :
Biomedical Engineering, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9294
Type :
jour
DOI :
10.1109/10.42114
Filename :
42114
Link To Document :
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