The effect of ureteric stents on urine flow: reflux

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 i...

Full description

Saved in:
Bibliographic Details
Published in:Journal of mathematical biology 2004-07, Vol.49 (1), p.56-82
Main Authors: Cummings, L J, Waters, S L, Wattis, J A D, Graham, S J
Format: Article
Language:English
Subjects:
Humans
Mathematical models
Models, Biological
Stents
Ureter - physiology
Ureter - surgery
Urination - physiology
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0303-6812
1432-1416
DOI:10.1007/s00285-003-0252-4