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Related Experiment Videos

Ureteral jets in normal second- and third-trimester pregnancy

B J Burke1, T L Washowich

  • 1Department of Radiology, Brooke Army Medical Center, Fort Sam Houston, Texas 78234, USA.

Journal of Clinical Ultrasound : JCU
|November 4, 1998
PubMed
Summary

Pregnancy alters ureteral jets, making diagnosis of urinary obstruction difficult. Urodynamic changes during pregnancy reduce jet symmetry and can cause unilateral absence, requiring caution when using this method.

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Area of Science:

  • Urology
  • Obstetrics
  • Diagnostic Imaging

Background:

  • Ureteral jets, visualized via color Doppler sonography, are used to assess urinary tract obstruction.
  • Normal pregnancy involves significant urodynamic changes that may affect ureteral jet patterns.

Purpose of the Study:

  • To determine if pregnancy-related urodynamic changes alter ureteral jet patterns.
  • To assess the impact of these alterations on diagnosing pathologic obstruction.

Main Methods:

  • Color Doppler sonography was used to observe ureteral jets for 5 minutes.
  • The study included 26 pregnant women (second/third trimester) and 6 non-pregnant controls.

Main Results:

  • Pregnant women showed fewer jets per minute (5.5) compared to controls (7.6).

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  • Significant differences in jet symmetry were observed between pregnant women (42% difference) and controls (11%).
  • Unilateral absence of ureteral jets occurred in 4 pregnant women, but not in controls.

    • Conclusions:

    • Ureteral jet bilaterality and symmetry vary significantly in late pregnancy.
    • Caution is advised when using ureteral jet analysis to diagnose obstructive urolithiasis in pregnant patients.
    • Pregnancy-induced urodynamic shifts complicate the interpretation of ureteral jet patterns.