Ohtake H, Watanabe G, Misaki T, Matsunaga Y, Takahashi M, Tsunezuka Y, Kawasuji M, Watanabe Y
Department of Surgery, Kanazawa University School of Medicine, Japan.
Pacing Clin Electrophysiol. 1996 Dec;19(12 Pt 1):2060-5. doi: 10.1111/j.1540-8159.1996.tb03279.x.
Several clinical factors decrease the accuracy of intraoperative laser ablation. The distance to the target, the irradiation angle, and the media are reported among these factors. We developed a new laser probe to resolve these problems. This probe has a hollow conical tube with a tip covered by a thin film. Zero-degree centigrade saline was fed into this probe. Results from using the new probe were compared with those from the conventional noncontact irradiation method with cooling by sprinkled cooling water. In beating canine hearts, ventricles were irradiated with neodymium:yttrium aluminum garnet (Nd:YAG) lasers at 50-200 J/mm2. There was no difference in the mean volume of irradiated tissue between the new and the noncontact method. However, the distribution of volume values in the new method was smaller than that in the noncontact method (P < 0.05). In conclusion, results obtained indicate that this new probe could perform more accurate intraoperative ablation than the conventional method. Problems of stabilizing the distance to the target, the irradiation angle, and the media were resolved.
几个临床因素会降低术中激光消融的准确性。这些因素包括与目标的距离、照射角度和介质。我们开发了一种新的激光探头来解决这些问题。该探头有一个空心锥形管，其尖端覆盖有薄膜。将0摄氏度的盐水注入该探头。将使用新探头的结果与通过喷洒冷却水进行冷却的传统非接触照射方法的结果进行比较。在跳动的犬心脏中，用钕:钇铝石榴石（Nd:YAG）激光以50 - 200 J/mm²的能量照射心室。新方法和非接触方法之间照射组织的平均体积没有差异。然而，新方法中体积值的分布比非接触方法小（P < 0.05）。总之，所获得的结果表明，这种新探头比传统方法能更准确地进行术中消融。稳定与目标的距离、照射角度和介质的问题得到了解决。
