A comparative study of DSA-guided percutaneous antegrade ureteral stent placement vs. percutaneous nephrostomy in malignant ureteral tract obstruction
ZHENG Wenheng1, YU Tao1, LUO Yahong1, ZENG Yu2, WANG Ying1, SHAN Guangyi2, LI Gang2, WANG Kai2
1 Department of Medical Imaging, Cancer Hospital of China Medical University, Liaoning Cancer Hospital&Institute, Shenyang 110042, China;
2 Department of Urology; Surgery,Cancer Hospital of China Medical University, Liaoning Cancer Hospital&Institute;
Abstract:Objective: To compare the clinical efficacy of anterograde ureteral stent placement vs. percutaneous nephrostomy in the treatment of ureteral obstruction caused by failure of retrograde ureteral stent placement under cystoscope or ureteroscope.Methods: Malignant ureteral obstruction cases admitted to Liaoning Cancer Hospital from May 2014 to May 2018 were collected. All cases failed to insert ureteral stent under retrograde cystoscope or ureteroscope. The patients were divided into ureteral stent group (32 cases) and fistula group (39 cases). The data of serum creatinine index, success rate of catheterization and complications were collected before and after operation. The renal cortex thickness, serum creatinine value, catheter blockage rate and success rate of catheter replacement were compared between the two groups after 6 months of follow-up. Results: No operative complications resulted in deaths in 71 patients. Among them, 5 patients in ureteral stent group were converted to nephrostomy because of the failure of guide wire opening during operation; the power of ureterostomy was 100%, higher than that of ureteral stent (84.3%, P<0.05); in 42 patients with obstruction and renal insufficiency, the serum creatinine levels in ureteral stent group and ureterostomy group were significantly reduced one week after operation (P<0.05). During the postoperative follow-up period of 1 month, the thickness of renal cortex in both groups was significantly increased as compared with that before operation (P<0.05). During the postoperative follow-up period of 3 months, the catheter blockage rate in the ureteral stent group was 11.6%, significantly higher than that in the nephrostomy group (0, P<0.05). The catheter replacement success rate in the ureteral stent group was 97.7%, and it was 85.7% in the nephrostomy group . Conclusions: Percutaneous anterograde ureteral stent placement and percutaneous nephrostomy are both safe and effective in the clinical application of alleviating malignant urinary tract obstruction, and can be used as a supplementary treatment for the failure of retrograde ureteral stent placement under cystoscopy or ureteroscopy.
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