Diagnostic Ultrasound - Abdomen and Pelvis

Transplant Renal Artery Stenosis
(Left) Doppler ultrasound of a
segmental lower pole artery in
a renal transplant with renal
artery stenosis shows tardus
parvus ſt with a decreased
acceleration index of 55.6
cm/s². (Right) CT arteriogram
performed after Doppler
ultrasound tardus parvus after
living unrelated renal
transplant. There is a twist in
the proximal renal artery ſt.
The iliac artery was
normal. The kidney was
abnormally rotated at surgery.
Diagnoses: Kidney Transplant
(Left) Doppler ultrasound of
the renal artery anastomosis
in a patient with acute kidney
injury 1 year after cadaver
transplantation is shown.
Color and Doppler aliasing are
noted at the anastomosis ſt
with peak velocities exceeding
385 cm/s. (Right) Digital
subtraction angiography of
the same patient confirms a
high-grade (90%) stenosis at
the anastomosis ſt. This was
treated with angioplasty.
(Left) Coronal unenhanced
MRA performed after
suspected renal artery stenosis
on Doppler ultrasound shows
delayed graft function and
hypertension 3 months after
cadaveric renal transplant.
There are 2 renal arteries with
a significant stenosis of the
inferior origin st and diffuse
irregularity of the superior
artery ſt. (Right) Digital
subtraction angiography of
the same patient confirms the
diffusely abnormal superior
artery ſt with alternating
stenoses/dilatation as well as
the more focal stenosis st of
the inferior artery.
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