Drainage and antireflux characteristics of a biodegradable self-reinforced, self-expanding X-ray-positive poly-L,D-lactide spiral partial ureteral stent: an experimental study

Journal of Endourology
J LumiahoP Törmälä

Abstract

To evaluate the drainage and antireflux characteristics of a new self-expandable self-reinforced poly-L,D-lactide partial ureteral stent (SR-PLA 96) in an experimental model. Twelve dogs were used as experimental animals. A low-midline laparotomy and cystotomy were performed on all animals. In group A (six animals), 50-mm long SR-PLA 96 ureteral stents with a double-helical spiral design were inserted into both ureters, leaving the lower ends 2 cm above the ureterovesical junction. In group B (six animals), both ureters were stented with traditional pigtail stents (C-Flex) Double-J; Cook Urological), which were removed 8 weeks after surgery. Renal function and ureteral patency were evaluated by dynamic kidney imaging and urography examinations at 6 and 12 weeks postoperatively. The degrees of vesicoureteral reflux at two levels of the ureters and at the level of the renal pelvis were evaluated by nuclear voiding cystograms at 6 weeks. The partial SR-PLA 96 stent design showed more favorable antireflux properties that the Double-J stent design. The degree of vesicoureteral reflux, reflected in an increase of nuclear enhancement at 6 weeks, was lower in the distal (7.9% +/- 14.7% v 63.2% +/- 17.3%; P < 0.05) and middle (6.1% +/- ...Continue Reading

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Citations

Apr 29, 2010·Current Urology Reports·Carlos E Mendez-ProbstJohn D Denstedt
Jan 16, 2010·Journal of Endourology·Nandakumar VenkatesanMukesh Doble
Oct 24, 2013·International Journal of Urology : Official Journal of the Japanese Urological Association·Ming Qing ZhangHua Xie
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Jan 13, 2011·Scandinavian Journal of Urology and Nephrology·Juha LumiahoMartti Talja
Mar 1, 2021·BMC Urology·Federico SoriaFrancisco M Sanchez-Margallo

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