Effect of varying Nd:YAG laser fiber tips on porcine dermal tissue

摘要

Abstract: We evaluated the effect of the 600 $mu@m bare (flat tip) and 600/100 $mu@m conical tip fibers on porcine skin. We compared their effect in both the continuous-wave (cw) and pulsed (P) modes (20 ms ON/OFF) at 20 W to that of the electrocautery at 100 W in the pure and blend 3 modes. On 11 farmer pigs, 6 cuts were made for each parameter combination. The samples were processed for histological evaluation. The cutting depth, cutting width, and total thermal damage (carbonization, coagulation and denaturation) were recorded for each parameter combination. The results show that the 600/100 $mu@m conical fiber provides deeper resective capabilities than the 600 $mu@m bare and electrocautery. In addition, the 600/100 $mu@m conical tip fiber allows for narrower cuts with significantly less thermal necrosis when compared to the 600 $mu@m bare and electrocautery. The results indicate that there is an advantage to using the sculptured tip fiber for creating incisions when compared to the bare fiber and electrocautery. !5