Department of Urology, The Ohio State University Wexner Medical Center, Columbus, Ohio 43210, USA.
J Endourol. 2013 Jan;27(1):71-4. doi: 10.1089/end.2012.0323. Epub 2012 Nov 7.
The PolyScope(®) (Lumenis, Santa Clara, CA) is a disposable flexible ureteroscope composed of a single-use flexible catheter and a reusable fiber optic bundle. We tested the resilience of the optical properties of the reusable optical fiber after repeat sterilization.
Optical properties evaluated were resolution, distortion, and light transmission. Two different optical fibers were tested, one for each sterilization method. Measurements on each fiber were obtained at baseline and were repeated after each set of 10 sterilization cycles for a total of 100 cycles. To measure resolution, the 1951 USAF Contrast Resolution Chart Target was used to subjectively identify the clearest image on the grid by two different operators. To measure distortion, three images of the distortion grid target were captured with a digital camera and analyzed within Image Pro Plus Software. Light transmission was measured using a digital light meter at 50% and 100% transmission.
There was no significant difference in resolution after 100 sterilization cycles between either Steris or Sterrad NX. Distortion changed by 8.7% and 11.2% for Steris and Sterrad NX, respectively. For Steris at 100% light transmission, baseline was 59 foot-candles and this increased to 85 foot-candles after 100 cycles. For Sterrad NX at 100% light transmission, baseline was 50 foot-candles and this increased to 92 foot-candles after 100 cycles. Results were similar at 50%. There was no significant difference between groups at 50%, 100%, or between sterilization modalities.
The PolyScope fiber optic bundle appears durable after 100 cycles of sterilization with either Steris or Sterrad NX.
PolyScope（®）（加利福尼亚州圣克拉拉的 Lumenis）是一种由一次性使用的柔性导管和可重复使用的光纤束组成的一次性使用的柔性输尿管镜。我们测试了可重复使用的光纤的光学性能在重复消毒后的弹性。
评估的光学性能包括分辨率、失真和光传输。测试了两种不同的光纤，每种光纤采用一种消毒方法。对每根光纤进行基线测量，并在每 10 次消毒循环后重复测量，共进行 100 次循环。为了测量分辨率，使用 1951 年美国空军对比度分辨率图表目标，由两名不同的操作人员主观地识别网格上最清晰的图像。为了测量失真，使用数码相机拍摄三个失真网格目标的图像，并在 Image Pro Plus 软件中进行分析。光传输使用数字光度计在 50%和 100%传输时进行测量。
在 100 次消毒循环后，Steris 和 Sterrad NX 之间的分辨率没有显著差异。Steris 和 Sterrad NX 的失真分别变化了 8.7%和 11.2%。对于 Steris 在 100%光传输时，基线为 59 英尺烛光，在 100 次循环后增加到 85 英尺烛光。对于 Sterrad NX 在 100%光传输时，基线为 50 英尺烛光，在 100 次循环后增加到 92 英尺烛光。在 50%时结果相似。在 50%、100%或消毒方式之间，各组之间没有显著差异。
PolyScope 光纤束在使用 Steris 或 Sterrad NX 进行 100 次消毒循环后，似乎具有耐用性。
