Post-biopsy arteriovenous fistulas of the native kidneys diagnosed by Doppler US |
| |
Authors: | Lorenzo E Derchi Carlo Martinoli Roberto Pontremoli Stefano Saffioti Caterina Pastorino |
| |
Institution: | (1) Istituto di Radiologia, Universita' di Genova, Viale Benedetto XV, 10, I-16132 Genova, Italy;(2) Cattedra di Nefrologia, Universita' di Genova, Viale Benedetto XV, 10, I-16132 Genova, Italy |
| |
Abstract: | 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.Correspondence to: L. E. Derchi |
| |
Keywords: | Arteriovenous fistulas Renal biopsy Doppler ultrasonography Native kidneys Color Doppler Renal fistulas |
本文献已被 SpringerLink 等数据库收录! |
|