Renal vein thrombosis is a
Clot in the renal vein; Occlusion – renal vein
Causes, incidence, and risk factors
Renal vein thrombosis is an uncommon disorder that may be caused by:
Abdominal aortic aneurysm
Dehydration(mostly in infants)
Scar formation with pressure on the
Trauma (to the back or abdomen)
In adults, the most common cause is nephrotic syndrome. In infants, the most common cause is dehydration.
- Blood clot to the lung
- Bloody urine
Decreased urine output Flank painor low back pain
Signs and tests
An examination may not reveal the specific problem, but may indicate nephrotic syndrome or other causes of renal vein thrombosis.
Abdominal CT scan
Duplex Doppler exam of the renal veins
Urinalysismay show protein in the urineor red blood cells in the urine
- X-ray of the kidney veins (venography)
The treatment is focused on preventing new clot formations and reducing the risk of the clot traveling to other locations in the body (embolization).
You may get medications that prevent blood clotting (anticoagulants) to stop new clots from forming. Your doctor may recommend bedrest or limited activity for a brief period.
Renal vein thrombosis usually gets better over time without permanently injuring the kidneys.
- Acute renal failure (especially if thrombosis occurs in a dehydrated child)
- Blood clot moves to the lungs (
- Formation of new blood clots
Calling your health care provider
Call your health care provider if you have symptoms of renal vein thrombosis.
If you have experienced renal vein thrombosis, call your health care provider if you develop decreased urine output,
There is no specific prevention for renal vein thrombosis in most people. Keeping enough fluids in the body to avoid dehydration may help reduce its risk.
In people who have had a kidney transplant, aspirin is sometimes used to prevent renal vein thrombosis. In people with certain chronic kidney diseases, blood thinners such as warfarin may be recommended.