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Related Experiment Videos

Positional variation in the Whitaker test

J H Ellis1, R P Campo, M V Marx

  • 1Department of Radiology, University of Michigan Medical Center, Ann Arbor 48109-0030, USA.

Radiology
|October 1, 1995
PubMed
Summary
This summary is machine-generated.

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Positional changes during the Whitaker test can reveal intermittent urinary obstructions missed in standard positions. This provocative testing is crucial for patients with unexplained symptoms or prior surgeries.

Area of Science:

  • Urology
  • Diagnostic Imaging

Background:

  • The Whitaker test assesses urinary tract obstruction by measuring pressure gradients.
  • Positional variations can influence the detection of intermittent obstructions.

Purpose of the Study:

  • To describe positional variations in Whitaker test outcomes.
  • To highlight the utility of positional changes in diagnosing urinary obstruction.

Main Methods:

  • Retrospective review of six patients with Whitaker test pressure gradient variations.
  • Analysis of pressure gradients in standard versus nonstandard positions.

Main Results:

  • Four patients showed obstruction only in nonstandard positions.
  • Two patients with ileal conduits had position-dependent results.

Related Experiment Videos

  • Obstruction varied by 10 to over 38 cm of water with positional changes.

    • Conclusions:

    • Positional Whitaker testing aids in identifying intermittent urinary obstructions.
    • Indications for positional testing include intermittent symptoms, ureteral kinks, and prior surgery.