新型膀胱软镜鞘改善血尿状态下膀胱软镜视野效果的体外评价

A novel continuous irrigation sheath improves vision of flexible cystoscope under hematuria:an in vitro evaluation

目的通过设计体外膀胱模型定量评价新型膀胱软镜鞘对膀胱软镜视野的改善效果。方法设计体外膀胱模型模拟血尿状态下膀胱软镜检查,根据是否存在膀胱内连续出血将实验分为静态实验和动态实验,根据镜检过程中冲洗状态分为无冲洗组(组1)、单纯进水组(组2)和持续冲洗组(组3),记录30、60、90和120 s膀胱软镜检查的视野范围和图像清晰度。结果在静态实验和动态实验中,膀胱软镜检查的视野范围和清晰度在3组之间有明显区别。与组1相比,组2和组3膀胱软镜检查的视野范围和清晰度在动态和静态实验中均有改善(P<0.01)。组3与组2相比,膀胱软镜检查视野清晰度在动态和静态实验中均有明显改善(P<0.05,P<0.01);视野范围在静态实验中没有明显区别,而在动态实验中有改善(P<0.05)。结论新型膀胱软镜鞘可明显改善血尿状态下膀胱软镜检查的视野范围和清晰度。

Objective To quantitatively evaluate the efficacy of a novel continuous irrigation sheath in improving the vision of flexible eystoseopy under hematuria using an in vitro bladder model. Methods An in vitro bladder model was designed for simulating flexible cystoscopy under hematuria. According to the presence of continuous hemorrhage the experiment was divided into the static experiment and the dynamic experiment. The experiment was divided into three groups according to three levels of the irrigation condition during flexible cystoscopy： no irrigation （Group 1）, continuous irrigation without an outflow of water （Group 2）, and continuous irrigation with an outflow of water （Group 3）. The vision field of flexible cystoseopy and vision precision of flexible cystoscopy images were recorded at 30, 60, 90 and 120 s. Results The vision field and precision of flexible cystoscopy images were greatly different between the 3 groups in both the static and the dynamic experiments. Compared with Group 1, the vision field and precision were significantly improved in Group 2 and 3 in both the static and the dynamic experiments（P〈0.01）. The vision precision of Group 3 was significantly better than that in Group 2 in both the static and the dynamic experiments（P〈0. 05, P〈0.01）, and the vision field of Group 3 was also significantly better than that in Group 2 in the dynamic experiments （P〈0.05）. Conclusion The novel continuous irrigation sheath can effectively improve the vision field and precision of flexible eystoseopy.