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Urodynamic evaluation of ileal conduit function.

P M Knapp, J W Konnak, E J McGuire

    The Journal of Urology
    |May 1, 1987
    PubMed
    Summary
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    Bilateral hydroureteronephrosis after ileal conduit urinary diversion can be challenging to diagnose. Conduit urodynamics offers a new method to identify functional issues causing ureteral dilation.

    Area of Science:

    • Urology
    • Surgical techniques
    • Diagnostic imaging

    Background:

    • Bilateral hydroureteronephrosis is a common complication following ileal conduit urinary diversion.
    • Potential causes include ureteroileal stenosis, stomal stenosis, or poor conduit compliance.
    • Standard diagnostic methods like loopograms may not determine the cause of ureteral dilation.

    Observation:

    • Conduit urodynamics was utilized to assess conduit function in patients with hydroureteronephrosis.
    • A triple lumen catheter measured conduit pressure proximal and distal to the fascia during fluoroscopic filling.
    • Control patients with normal upper tracts exhibited conduit leak point pressures between 5-20 cm water.

    Findings:

    • Abnormalities were identified in 5 out of 6 patients studied.

    Related Experiment Videos

  • Specific findings included functional stomal stenosis (2 patients), an atonic loop (1 patient), segmental obstruction (1 patient), and a high-pressure noncompliant distal segment (1 patient).

    • Implications:

    • Conduit urodynamics provides valuable functional information beyond standard tests for evaluating hydroureteronephrosis post-diversion.
    • This technique can help differentiate causes of ureteral dilation, guiding appropriate management.
    • Further research may refine urodynamic parameters for improved diagnostic accuracy in ileal conduit complications.