The effect of ureteric stents on urine flow: Reflux |
| |
Authors: | Email author" target="_blank">LJ?CummingsEmail author SL?Waters JAD?Wattis SJ?Graham |
| |
Institution: | (1) School of Mathematical Sciences, University of Nottingham, Nottingham, NG7 2RD, U.K;(2) Barnet & Chase Farm Hospitals, NHS Trust, The Ridgeway, Enfield, Middlesex, EN2 8JL, U.K |
| |
Abstract: | If the ureter becomes blocked, the resultant increased pressure may be relieved by inserting a double-J stent (a polymer tube, usually punctuated with holes). A major clinical problem associated with stent use is reflux (retrograde flow of urine from the bladder to the kidney), which may result in infections, scarring, and even renal failure. We develop a mathematical model, treating the ureter as an elastic tube and the stent as a permeable rigid tube within it. We investigate how the number of holes in the stent wall affects the total amount of reflux that occurs when bladder pressure rises, by considering the limits of a highly-permeable stent, and an impermeable stent. We find that, in the scenarios we consider, the highly-permeable stent gives rise to less total reflux than the impermeable one.Revised version: 8 August 2003 |
| |
Keywords: | or phrases: Urology Ureter Stent Reflux Elastic tube |
本文献已被 PubMed SpringerLink 等数据库收录! |
|