University of California, Department of Urology, Irvine, Orange, CA 92868, USA.
Urology. 2012 May;79(5):1011-4. doi: 10.1016/j.urology.2011.11.002. Epub 2012 Jan 13.
To evaluate the effect that a safety wire (SW) had on insertion force and direct ureteral trauma using ureteral access sheaths (UAS) in an ex vivo porcine model.
UASs were advance into 20 fresh ex vivo porcine kidney-ureters, either with or without SWs. The average and max force of insertion were recorded. Retrograde saline injection was used to identify the presence of lacerations.
For SW vs no SW, the mean insertion force (1.79 vs 0.67, P = .0003, respectively) and max insertion force (2.29 kg vs 1.00, P = .0007) was greater in the SW group. There were 9 lacerations, 6 of which were partial and 3 complete. Of the partial injuries, 2 were in the no SW group and 4 were in the SW group. Of the complete lacerations, 2 occurred in the no SW group and 1 in the SW group. However, there was no significant difference in the total number of lacerations (P = 1.00), the number of partial lacerations (P = .628), or the number of complete lacerations (P = 1.00) between the 2 groups.
The use of an SW significantly increases the force required to insert a UAS; however, it does not appear to affect the force or the degree of ureteral injury.
在猪离体模型中，评估安全线（SW）对使用输尿管进入鞘（UAS）插入力和直接输尿管创伤的影响。
将 UAS 推进 20 个新鲜的猪离体肾-输尿管，分别有无 SW。记录平均和最大插入力。逆行盐水注射用于识别裂伤的存在。
对于 SW 与无 SW 组，SW 组的平均插入力（1.79 与 0.67，P =.0003）和最大插入力（2.29 与 1.00，P =.0007）更大。有 9 个裂伤，其中 6 个是部分的，3 个是完全的。在无 SW 组中有 2 个部分损伤，在 SW 组中有 4 个部分损伤。在完全撕裂伤中，无 SW 组中有 2 个，SW 组中有 1 个。然而，两组之间的总裂伤数量（P = 1.00）、部分裂伤数量（P =.628）或完全裂伤数量（P = 1.00）没有显著差异。
使用 SW 显著增加了插入 UAS 所需的力；然而，它似乎不会影响输尿管损伤的程度或力。
