Hwang T K, Yoon J Y, Ahn J H, Park Y H
Department of Urology, Catholic University Medical College, Seoul, Korea.
J Urol. 1996 Mar;155(3):882-4.
We determined the optimal size (6F versus 14/7F) of stent after endoscopic surgery based on clinical data.
Between 1989 and 1993 we performed percutaneous endopyelotomy and endoureterotomy in 40 cases of ureteropelvic junction or upper ureteral strictures. The causes of stricture were primary in 20 cases, tuberculosis in 9, previous operation in 6 and others in 5. After endoscopic management we placed 6F internal stents in 25 patients (13 in primary and 12 in secondary cases) or 14/7F endopyelotomy stents in 15 patients (7 in primary and 8 in secondary cases) for 6 to 8 weeks (average 54.2 days). Coexisting stones or infundibular strictures were managed simultaneously. All patients have been followed for a minimum of 7 months postoperatively (range 7 to 55, average 38).
Overall success rate was 84% (92.3 in primary and 75% in secondary cases) with the 6F stent and 93.3% (85.7% in primary and 100% in secondary cases) with the 14/7F endopyelotomy stent.
The small number of patients in each group did not reach statistical significance. However, there was a definite trend for better results with the use of 14/7F stents in patients with secondary stricture (100% versus 75%), although the difference in success rates between 6F and 14/7F stents was not significant statistically (p = 0.13).
我们根据临床数据确定了内镜手术后支架的最佳尺寸（6F 与 14/7F）。
1989 年至 1993 年期间，我们对 40 例肾盂输尿管连接处或上段输尿管狭窄患者进行了经皮肾盂内切开术和输尿管内切开术。狭窄原因中，原发性 20 例，结核性 9 例，既往手术史 6 例，其他 5 例。内镜治疗后，25 例患者（原发性 13 例，继发性 12 例）置入 6F 内支架，15 例患者（原发性 7 例，继发性 8 例）置入 14/7F 肾盂内切开术支架，持续 6 至 8 周（平均 54.2 天）。同时处理合并的结石或漏斗部狭窄。所有患者术后至少随访 7 个月（范围 7 至 55 个月，平均 38 个月）。
6F 支架的总体成功率为 84%（原发性 92.3%，继发性 75%），14/7F 肾盂内切开术支架的成功率为 93.3%（原发性 85.7%，继发性 100%）。
每组患者数量较少，未达到统计学意义。然而，继发性狭窄患者使用 14/7F 支架的效果有明显更好的趋势（100%对 75%），尽管 6F 和 14/7F 支架成功率的差异无统计学意义（p = 0.13）。
