Post-biopsy arteriovenous fistulas of the native kidneys diagnosed by Doppler US

Lorenzo E. Derchi, Carlo Martinoli, Roberto Pontremoli, Stefano Saffioti, Caterina Pastorino

Research output: Contribution to journalArticlepeer-review


Two patients with arteriovenous fistulas of the native kidney occurring after needle biopsy were evaluated using duplex and color Doppler ultrasonography. The first patient had a fistula with associated pseudoaneurysm: color Doppler showed the lesion as a small rounded area with whirling flow; spectral analysis allowed recognition of both the afferent artery with low impedance flow and the draining vein with pulsatile, arterialized flow. The second patient had a normal color Doppler study; however, spectral analysis demonstrated signals with low vascular impedance from an intra-parenchymal artery at the lower pole, and a jet of turbulent flow. Following disappearance of clinical findings, such Doppler abnormalities were no longer detectable. When a iatrogenic arteriovenous fistula is considered on clinical grounds, both color and Doppler spectral analysis of waveforms from intra-parenchymal vessels should be performed. Possibly, further advances in color Doppler technology will permit the use of this examination as the first imaging procedure in these clinical situations.

Original languageEnglish
Pages (from-to)186-189
Number of pages4
JournalEuropean Radiology
Issue number2
Publication statusPublished - Apr 1993


  • Arteriovenous fistulas
  • Color Doppler
  • Doppler ultrasonography
  • Native kidneys
  • Renal biopsy
  • Renal fistulas

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging


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