Asymptomatic renal artery stenosis in a renalgraft - Color Ultrasound


Title: Color Ultrasound - Asymptomatic renal artery stenosis in a renalgraft
Diagnosis: Asymptomatic renal artery stenosis in a renalgraft
Author: Dr.ROSSET Antoine
Comment: Dr. KHAN Haleem
Hospital: HUG
Department: Radiologie
State: Terminée
Date: 21.03.2003
: 4250
Chapter: Vascular System

Clinical Presentation: Annual workup of a renal graft. Bloodpressure is normal as
is the renal function.
Comment: Renal artery stenosis occurs in approximately 10% ofrenal grafts. The
most frequent are anastomotic strictures butdistal donor or recipient artery stenosis can
also be seen. Themost reliable finding in Color Doppler and Duplex is an
acceleratedvelocity (Vmax> 180 cm/sec) and distant turbulent flowdownstream of
hemodynamically significant stenosis. A tardus parvuswaveform can be noted. Focal areas
of aliasing can be seen at sitesof tight renal artery stenosis. These findings can also be
presentin cases of renal artery kinking.
Description: The renal graft is in the left iliac fossa. The B modeappearance is
normal without dilatation of the urinary tract. Onthe color image a focal area of aliasing is
present at the zone ofnarrowing of the renal artery adjacent to the anastomosis.
DuplexDoppler demonstrates a high-velocity jet (Vmax > 250 cm/sec) atthe level of the

Order: 1010
Dislocation: 0
Polytrauma: 0
Open: 0
Pathologic: 0
Operation: 00.00.00
Graft: 0

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