Ultrasonic localization for renal biopsy.

B-scan ultrasound was used in 30 patients to localize the kidney prior to renal biopsy. The lower pole of the kidney was outlined in the longitudinal and transverase planes and the depth of the kidney was easily obtained from the ultrasonic tracings. The puncture site was marked on the skin and the angle of the needle pathway determined. Renal biopsy was performed successfully in 28 patients, which compares favorably with the results of other localization methods.