Interstitial laser photocoagulation: Nd:YAG 1064 nm optical fiber source compared to point heat source.
Interstitial laser photocoagulation (ILP) was performed in vitro in lean bovine and chicken muscle by delivering 1.6 W of continuous-wave Nd:YAG laser energy (1064 nm) from a 400-microns core optical fiber for 300s. The resulting thermal coagulation lesion was consistently larger when the delivered energy was deposited into a small steel sphere than when it was delivered freely into the tissue. Mathematical modelling confirms this result. This preliminary study suggests that a point heat source produces a larger volume of thermal coagulation than a point optical source (1064 nm) delivering the same power.
Wyman
D R
DR
Hamilton Regional Cancer Centre, Ontario, Canada.
Whelan
W M
WM
Wilson
B C
BC
D000818:Animals; D002417:Cattle; D002645:Chickens; D005336:Fiber Optic Technology; D006358:Hot Temperature; D066298:In Vitro Techniques; D053685:Laser Therapy / Q000295:instrumentation*; D008028:Light Coagulation / Q000379:methods*; D008954:Models, Biological; D009132:Muscles / Q000601:surgery*; D055100:Optical Fibers