Design and preparation of a flexible ureteroscope sheath with variable diameter and its application on pigs

Yang LI; Yajun SONG; Xu WANG; Wengang HU; Chibing HUANG

doi:10.16016/j.1000-5404.201905044

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Design and preparation of a flexible ureteroscope sheath with variable diameter and its application on pigs

Clinical Medicine | 更新时间：2026-01-09

- Design and preparation of a flexible ureteroscope sheath with variable diameter and its application on pigs
- Journal of Third Military Medical University Vol. 41, Issue 21, Pages: 2127-2131(2019)
- 作者机构：
  
  400037 重庆，陆军军医大学(第三军医大学)第二附属医院泌尿外科
- 作者简介：
- 基金信息：
  
  the Achievement Transformation Foundation of Army Medical University(2015D336)
- DOI：10.16016/j.1000-5404.201905044
  CLC： R-332;R690.8
- Received：08 May 2019，
  
  Revised：2019-07-16，
  
  Published：15 November 2019
- 稿件说明：
移动端阅览
Yang LI, Yajun SONG, Xu WANG, et al. Design and preparation of a flexible ureteroscope sheath with variable diameter and its application on pigs[J]. Journal of Third Military Medical University, 2019, 41(21): 2127-2131.
DOI：

Yang LI, Yajun SONG, Xu WANG, et al. Design and preparation of a flexible ureteroscope sheath with variable diameter and its application on pigs[J]. Journal of Third Military Medical University, 2019, 41(21): 2127-2131. DOI： 10.16016/j.1000-5404.201905044.

摘要

目的

研制一种能实现小口径置管，大口径操作的可变口径输尿管软镜鞘管，并用动物实验观察其置管效果。

方法

参照输尿管相关数据，利用计算机辅助设计和制作研制新型鞘管。选择12只雌性中华猪，按随机数字表法分成2组，分别采用新型鞘管(实验组)和12Fr传统鞘管(对照组)进行鞘管置入与拔除实验，实验结束统计置管拔管时间、操作总时间、置管过程鞘管口径、置管成功率、输尿管损伤病理。

结果

成功制作完成带水囊可调节口径大小的鞘管并进行实验，实验组与对照组置管时间[(1.58± 0.41)min

(3.53±1.09)min

]

、操作总时间[(9.59±2.95)min

(13.74±3.72)min

]

、置入时鞘管外径[(2.15±0.25)mm

(4.00±0.08)mm

]

、置管成功率(100%

80%)差异均有统计学意义(

0.05)；实验组输尿管损伤较对照组轻(

0.05)；两组拔除时间和置入后鞘管内径差异无统计学意义(

0.05)。

结论

新型鞘管能建立与传统鞘管相似的操作通道，且置管时外径小，操作时间短，输尿管损伤轻，具有较好的应用前景。

Abstract

Objective

To prepare a sheath with variable diameter which can achieve catheterization with small diameter while operation with large diameter

and evaluate its effect of catheterization in animals.

Methods

With reference to ureter data

a new sheath was designed and made by computer-aided procedure. Then 12 female Chinese pigs were randomly divided into experimental group (new sheath) and control group (12Fr conventional sheath) to undergo sheath insertion and extraction experiments. The time of tube extubation and catheterization

total time of operation

sheath diameter during catheterization

success rate of catheterization

and morphology of ureteral injury were observed and recorded

and the results were compared between the 2 groups.

Results

The water-balloon ureteral access sheath was successfully prepared. The experimental group had significantly shorter insertion time (1.58±0.41

3.53±1.09 min) and total operation time (9.59±2.95

13.74±3.72 min)

smaller outer diameter of sheath during catheterization (2.15±0.25

4.00±0.08 mm)

higher catheter success rate (100%

80%)

and milder ureteral injury when compared with the control group (

0.05). But

there were no obvious differences in extraction time and inner diameter after catheterization between the 2 groups (

0.05).

Conclusion

Our newly-designed sheath can establish the similar operation channel as the conventional sheath

with the advantages of smaller outer diameter

shorter operation time and milder ureter damage

and has a favorable application prospect.

关键词

Keywords

references

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