Department of Urology, University Hospital Grosshadern, Ludwig-Maximilians-University Munich, Munich, Germany.
J Endourol. 2010 Jul;24(7):1061-6. doi: 10.1089/end.2010.0077.
To characterize the mechanical and optical properties of the PolyScope endoscope system and to examine the clinical outcome in patients who were undergoing ureteronephroscopy.
Mechanical assessment involved measurement of the deflection angle and irrigation flow rate. Optical resolution and distortion, field and angle of view, and light transmission and output formed the optical assessment. Clinical assessment was made in a series of consecutive ureteronephroscopy procedures. The optical cord was disconnected after each procedure, and the image fiber was assessed for damage.
The mean value for the angle of maximum active tip deflection with an empty working channel was 265 degrees (261-275 degrees). Deflection was impaired most with insertion of the 3.0 F basket (10% decrease) and least with an indwelling 220 microm laser fiber (2% decrease). Irrigation flow rate was 57 mL/min with an empty working channel. Flow was reduced by 50% and 68%, with the insertion of a 200 microm or 365 microm laser probe, respectively, and by 92.5% with a 3.2F basket. No damage to the image fiber occurred. The PolyScope optics system could identify a target of about 0.125 mm at a distance of 2 to 4 mm, based on 3 line-pairs/mm needed for clear identification. Lithotripsy of renal calculi was performed for 40 stone burdens in 32 patients; the resulting stone-free rate was 87.5%.
The novel semidisposable ureteroscope system PolyScope was simple to use, effective, and reliable in this preliminary clinical evaluation. It overcomes the inherent fragility of comparable devices, which renders the need for maintenance unnecessary.
描述 PolyScope 内窥镜系统的机械和光学特性，并检查接受输尿管镜检查的患者的临床结果。
机械评估包括测量偏转角和冲洗流量。光学分辨率和失真、视野和视角以及光传输和输出构成了光学评估。临床评估是在一系列连续的输尿管镜检查程序中进行的。每次程序后都会断开光导索，并评估图像纤维是否损坏。
在有空工作通道的情况下，最大主动尖端偏转角的平均值为 265 度（261-275 度）。插入 3.0 F 篮时，偏转角受到的影响最大（减少 10%），而插入留置的 220 微米激光纤维时，影响最小（减少 2%）。空工作通道的冲洗流量为 57 mL/min。插入 200 微米或 365 微米激光探头时，流量分别减少 50%和 68%，而插入 3.2F 篮时，流量减少 92.5%。图像纤维未损坏。基于需要 3 线对/mm 才能清晰识别，PolyScope 光学系统可以在 2 到 4 毫米的距离识别约 0.125 毫米的目标。对 32 名患者的 40 个肾结石负荷进行了碎石术；无石率为 87.5%。
在初步临床评估中，新型半一次性输尿管镜系统 PolyScope 易于使用、有效且可靠。它克服了类似设备固有的易碎性，因此无需进行维护。
