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Related Experiment Videos

Evaluation of renal transplant dysfunction using color Doppler sonography.

C P Johnson1, W D Foley, S Gallagher-Lepak

  • 1Department of Transplant Surgery, Medical College of Wisconsin, Milwaukee.

Surgery, Gynecology & Obstetrics
|October 1, 1991
PubMed
Summary

Color Doppler sonography (CDS) effectively detects renal transplant dysfunction. While less effective early post-transplant, CDS shows high specificity for rejection later, offering advantages over traditional methods.

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Area of Science:

  • Nephrology
  • Radiology
  • Transplant Surgery

Background:

  • Renal transplant dysfunction (RTD) requires accurate diagnostic tools.
  • Color Doppler sonography (CDS) assesses renal blood flow changes.
  • Pulsatility index (PI) is a key parameter in CDS analysis.

Purpose of the Study:

  • To evaluate the clinical performance of CDS in diagnosing RTD.
  • To determine the sensitivity and specificity of CDS for specific complications.
  • To compare CDS with conventional radionuclide imaging.

Main Methods:

  • Reviewed 223 CDS measurements in 130 renal transplant recipients.
  • Calculated pulsatility index (PI) and defined abnormal PI thresholds.
  • Analyzed CDS performance in early and late post-transplant periods.

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  • Compared CDS with 99mTc DTPA renograms.

    • Main Results:

    • CDS could not differentiate early post-transplant complications (ATN, obstruction, rejection).
    • CDS showed 63% sensitivity and 92% specificity for rejection in the late period.
    • Cyclosporine toxicity was not linked to abnormal PI.
    • CDS was more sensitive than renography for rejection, though not statistically significant.

    Conclusions:

    • CDS is a valuable tool for evaluating RTD, particularly for detecting rejection postoperatively.
    • CDS offers advantages in speed, cost, and portability over radionuclide imaging.
    • CDS is likely to become a preferred imaging modality in renal transplantation.