Modified technique of ureteral stent placement during transurethral resection of bladder cancer invading the ureteral orifice

Abstract

Objective To evaluate the efficacy and safety of modified technique of ureteral stent placement during transurethral resection of bladder tumor. Methods Seventeen patients with muscle invasive bladder cancer invading the ureteral orifice from March 2014 to June 2016 in Beijing Friendship Hospital were randomly divided into two groups. In the modified technique group (group A, n= 10), tumor was resected until the ureteral orifice was exposed. Then, a guide wire was placed through the tunnel of Electrode loop and the ureteral stent was placed along the guide wire. In control group (group B, 7 cases), after ureteral orifice exposed, the guide wire and ureteral stent was placed with cystoscopy. The demographic, oncological baseline and operative factors were evaluated between two groups. Results There was no difference in tumor grade and maximum diameter between two groups (P>0.05). The operation time in group A was significantly shorter than that in group B[(39.5±14.8)min vs (59.3±16.2) min, P=0.020], and the intraoperative vision clarity score was better in group A as well[(7.7±1.3) vs (5.9±1.2), P=0.010]. There was no statistical difference between the two groups in the complication. Conclusions The modified technique can improve the efficiency of ureteral stent placement during transurethral resection of bladder tumor without any risk enhancement. Key words: Urinary bladder neoplasms; Ureteral orifice invading; Uretera; Stent; Technique improvement