Department of Urology, Ohio State University Medical Center, Columbus, Ohio, USA.
J Urol. 2009 Jul;182(1):348-54. doi: 10.1016/j.juro.2009.02.112. Epub 2009 May 17.
Prior study has shown that holmium:YAG laser fiber performance differs among manufacturers. We determined the performance and threshold for failure of 24 commercially available holmium:YAG laser fibers.
Single use and reusable fibers were tested in small (150 to 300 microm) and medium (300 to 400 microm) core diameter sizes. All fibers were evaluated for flexibility, failure threshold and true fiber diameter. Flexibility was measured by maximally deflecting a Stryker U-500 ureteroscope with the fiber in the working channel. The diameter of each fiber was measured by a digital micrometer. The failure threshold was assessed by bending the fibers to 180 degrees, beginning with a radius of 1.25 cm. A VersaPulse 100 W holmium:YAG laser was operated at 1.2 J and 10 Hz for 1 minute or until fiber fracture. The bend radius was decreased in 0.25 cm increments and testing was repeated until a minimum bend radius of 0.5 cm was attained or until the fiber failed.
Of the small core fibers the SureFlex LLF-150 and LLF-273, OptiLite SMH1020F and Dornier LG Super 270 had the highest threshold for failure. The Accuflex 200 had the lowest failure threshold failing at the largest bend radius (1.75 cm). Of the medium core fibers the SureFlex LLF-365, Accuflex 365 and Lumenis SL 365 had the highest failure threshold, while the Dornier LG 400 and Lumenis EZ SL 365 were the lowest. The reusable Lumenis 365 fiber had a higher failure threshold than the single use Lumenis 365 fiber.
Commercially available holmium:YAG laser fibers differ significantly in their performance characteristics.
先前的研究表明钬：YAG 激光光纤的性能在不同制造商之间存在差异。我们确定了 24 种市售钬：YAG 激光光纤的性能和失效阈值。
对一次性使用和可重复使用的光纤进行了小（150 至 300 微米）和中（300 至 400 微米）芯径尺寸的测试。所有光纤均评估了柔韧性、失效阈值和真实光纤直径。通过将纤维置于工作通道中，使史赛克 U-500 输尿管镜最大限度地弯曲来测量柔韧性。用数字千分尺测量每个光纤的直径。通过将光纤弯曲 180 度来评估失效阈值，起始半径为 1.25 厘米。VersaPulse 100 W 钬：YAG 激光以 1.2 J 和 10 Hz 运行 1 分钟或直至光纤断裂。弯曲半径以 0.25 厘米的增量减小，并且重复测试，直到达到 0.5 厘米的最小弯曲半径或直到光纤失效。
在小芯光纤中，SureFlex LLF-150 和 LLF-273、OptiLite SMH1020F 和 Dornier LG Super 270 的失效阈值最高。Accuflex 200 的失效阈值最低，在最大弯曲半径（1.75 厘米）下失效。在中芯光纤中，SureFlex LLF-365、Accuflex 365 和 Lumenis SL 365 的失效阈值最高，而 Dornier LG 400 和 Lumenis EZ SL 365 的失效阈值最低。可重复使用的 Lumenis 365 光纤的失效阈值高于一次性使用的 Lumenis 365 光纤。
市售钬：YAG 激光光纤在性能特征上有显著差异。
