AI Article Synopsis
- - Ureteral stenosis can obstruct urine flow and lead to renal failure, with ureteral stents used to alleviate this issue by enabling urine to flow more freely in the upper urinary tract.
- - The insertion of a stent can weaken ureteral peristalsis over time, causing the ureter to appear tubular and curved rather than functioning normally.
- - A study involving 12 stent models (six curved and six straight) highlighted that curved stent designs, which mimic human anatomy, are more effective for simulating and improving urine flow in computational fluid dynamics (CFD) evaluations.
Article Abstract
A ureteral stenosis or occlusion causes the disturbance of normal urine flow and results in renal failure. Ureteral stents are used to relieve the stagnation of urine in the upper urinary tract. Peristalsis in the ureter, which occurs to help urine flow, becomes to weaken when a stent is inserted and effective peristalsis disappears as time goes on, and a stented ureter seems to be tubular and curved in the human body. Double J stents, which are manufactured by many medical companies and are used widely these days, have different geometries of side holes in the stent shafts. In total, 12 models-six curved models of a stented ureter according to different numbers and positions of side holes and ureteral and stent stenoses and another six straight models for comparison with the curved ones-were made based on the data collected from 19 men. The flow rate and pattern in the stented ureter were evaluated using computational fluid dynamics (CFD). According to the results, curved models reflecting the human anatomy seem to be more desirable in the CFD simulation of urine flow and must be good for evaluating the effect of geometrical variations in stent design on urine flow.
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| http://dx.doi.org/10.3233/BME-151308 | DOI Listing |
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