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Urologic radiology

, 3:1 | Cite as

How accurate is ultrasonography in detecting hydronephrosis in azotemic patients?

  • Lee B. Talner
  • William Scheible
  • Paul H. Ellenbogen
  • Clyde H. Beck
  • Barbara B. Gosink
Originals

Abstract

Screening for hydronephrosis continues to be an essential part of the evaluation of patients with azotemia of unknown cause. To determine whether sonography is as reliable as nephrotomography for screening purposes, we carried out a prospective, comparative study. Sixty-two patients were evaluated. Mean serum creatinine was 4.3 mg/dl. Of 116 kidneys, 45 were obstructed according to urographic criteria and 42 of these were correctly called hydronephrotic by sonography. The 3 false negative sonographic studies occurred in 2 patients. All 3 kidneys contained radiopaque calculi visible on the plain abdominal film. Of the 71 nonobstructed kidneys, 5 were mistakenly called hydronephrotic by ultrasound, giving a false positive rate of 7%. We believe it is appropriate to use gray-scale ultrasound as a screening test for urinary obstruction in azotemic patients providing the plain abdominal radiograph shows no calcifications.

Key words

Renal failure Hydronephrosis Ultrasound accuracy Urinary obstruction 

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Copyright information

© Springer-Verlag 1981

Authors and Affiliations

  • Lee B. Talner
    • 1
  • William Scheible
    • 2
  • Paul H. Ellenbogen
    • 5
  • Clyde H. Beck
    • 3
  • Barbara B. Gosink
    • 4
  1. 1.Department of RadiologyUniversity of CaliforniaSan DiegoUSA
  2. 2.Division of UltrasoundUniversity of CaliforniaSan DiegoUSA
  3. 3.Division of NephrologyUniversity of CaliforniaSan DiegoUSA
  4. 4.Veterans Administration HospitalSan DiegoUSA
  5. 5.Department of RadiologyPresbyterian Hospital of DallasDallasUSA

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