“ Renal artery thrombosis Rare complication, requires urgent surgical intervention to save the graft. US • No arterial or venous signal on...
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Renal artery thrombosis
Rare complication, requires urgent surgical intervention to save the graft.
US
• No arterial or venous signal on Doppler
Acute tubular necrosis (ATN)
Most common cause of delayed graft function (need for dialysis in the first week post-transplant).
Usually presents in cadaveric grafts. Rare late complication.
• Usually normal findings and normal Doppler flow
• May show reversed arterial flow in diastole
Venous thrombosis
US
• Enlarged with or without hypoechoic graft.
• Doppler shows no venous flow and arterial flow is reversed in diastole.
Peri-transplant haematoma
Small collections are common after surgery. Problematic if large or pressuring the graft.
US
• Hypoechoic crescent adjacent to the graft
• Free fluid in the abdomen with intraperitoneal grafts
Doppler ultrasound scan of a renal transplant showing diastolic flow reversal (red arrows), in keeping with renal vein thrombosis (there is a differential).
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