AI Article Synopsis
- * A study explored the impact of side holes in double J stents on urine flow, specifically using models that mimic human anatomy instead of straight ureters.
- * Findings revealed that side holes improved urine flow rates in cases of ureteral stenosis, particularly as the severity of the stenosis increased, although their angular positioning did not influence the flow rates.
Article Abstract
Ureteral stenosis presents with a narrowing in the ureter, due to an intrinsic or extrinsic ureteral disease, such as ureter cancer or retroperitoneal fibrosis. The placement of a double J stent in the upper urinary system is one of the most common treatments of ureteral stenosis, along with the insertion of a percutaneous nephrostomy tube into the renal pelvis. The effect that the side holes in a double J stent have on urine flow has been evaluated in a few studies using straight ureter models. In this study, urine flow through a double J stent's side holes was analyzed in curved ureter models, which were based on human anatomy. In ureteral stenosis, especially in severe ureteral stenosis, a stent with side holes had a positive effect on the luminal and total flow rates, compared with the rates for a stent without side holes. The more side holes a stent has, the greater the luminal and total flow rates. However, the angular positions of the side holes did not affect flow rate. In conclusion, the side holes in a double J stent had a positive effect on ureteral stenosis, and the effect became greater as the ureteral stenosis became more severe.
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| http://dx.doi.org/10.3233/THC-171307 | DOI Listing |
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