Royston D D, Waynant R W, Elliott A M, Oshry S
Food and Drug Administration, Rockville, Maryland 20857.
Lasers Surg Med. 1992;12(2):215-21. doi: 10.1002/lsm.1900120217.
Round sapphire and silica tips have been studied as surgical probes for focusing Nd:YAG laser radiation during various surgical indications. Since most of these data have been obtained with silica tips from Surgical Laser Technology, there are limited data on the physical performance of round sapphire tips. An investigation of round sapphire tip performance during tissue ablation was undertaken. Nd:YAG laser power was delivered in repetitive 2-sec exposures to a round sapphire tip placed on fresh skinned chicken breast. Total exposures of 1,000 J were performed at different saline perfusion rates. The tip's performance in terms of tissue perforation rate, blanched tissue area, tissue heating rate, and forward transmission was measured. Best tip performance occurred at the lowest cooling rates and was independent of the tip's forward transmission value. No physical deterioration of the tip's optical surface was observed. Round sapphire tip performance in a saline field is primarily determined by the tip's temperature.
钇铝石榴石激光辐射的手术探头。由于这些数据大多是使用来自外科激光技术公司的石英尖端获得的，关于圆形蓝宝石尖端物理性能的数据有限。因此对圆形蓝宝石尖端在组织消融过程中的性能进行了研究。将钕:钇铝石榴石激光能量以重复2秒曝光的方式传递到放置在新鲜去皮鸡胸肉上的圆形蓝宝石尖端。在不同的盐水灌注速率下进行了1000焦耳的总曝光。测量了尖端在组织穿孔率、变白组织面积、组织加热速率和向前传输方面的性能。最佳尖端性能出现在最低冷却速率下，且与尖端的向前传输值无关。未观察到尖端光学表面的物理劣化。圆形蓝宝石尖端在盐水环境中的性能主要由尖端温度决定。
