Magnetic resonance imaging of in vitro urine flow in single and tandem stented ureters subject to extrinsic ureteral obstruction.

ABSTRACT:

Objective

To quantify the relative volumetric flows in stent and ureter lumina, as a function of stent size and configuration, in both unobstructed and externally obstructed stented ureters.

Methods

Magnetic resonance imaging was used to measure flow in stented ureters using a phantom kidney model. Volumetric flow in the stent and ureter lumina were determined along the stented ureters, for each of four single stent sizes (4.8F, 6F, 7F, and 8F), and for tandem (6F and 7F) configurations. Measurements were made in the presence of a fully encircling extrinsic ureteral obstruction as well as in benchmark cases with no extrinsic ureteral obstruction.

Results

Under no obstruction, the relative contribution of urine flow in single stents is 1-10%, while the relative contrib

SUBMITTER: Dror I 

PROVIDER: S-EPMC9796179 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature