A kidney biopsy is the removal of a small piece of kidney tissue or cells. The tissue or cells are evaluated under a microscope to look for abnormalities.
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Reasons for Procedure
A kidney biopsy is done to diagnose a disease or medical condition.
A kidney biopsy may be done if you have:
- Blood in the urine
- High levels of protein in the urine
- Low kidney function
- A growth on the kidney
- A cyst on the kidney
After the tissue is examined, a diagnosis can be made and treatment can begin.
If you had a
kidney transplant, this procedure may be done to see if your new kidney is working properly.
Complications are rare, but no procedure is completely free of risk. If you have a kidney biopsy, your doctor will review a list of possible complications, which may include:
may increase the risk of complications.
If you smoke, talk to your doctor about ways to quit.
Be sure to discuss these risks with your doctor before the biopsy.
What to Expect
Prior to Procedure
Before the biopsy, your doctor may order urine tests, blood tests, and
of your kidneys.
- You should ask your doctor when you can expect to know the biopsy results.
- Arrange for a ride home after your biopsy.
- Your doctor may ask you to fast or eat lightly before your biopsy.
Talk to your doctor about your medications. You may be asked to stop taking some medications up to 1 week before the procedure.
You will receive a local anesthetic to numb your skin. You may also receive a light sedative.
Description of Procedure
This procedure is usually done in an outpatient setting with no need for an overnight stay. Your skin on your back or abdomen may be cleaned. A local anesthetic will be injected into the area where the biopsy will be taken. Next, your kidney will be located using either
or x-ray. Then, long needles will be inserted to collect tissue samples. A special instrument may be used to insert the needles. During the collection, you may be asked to hold your breath. After the samples are collected, a bandage will be placed on your skin.
How Long Will It Take?
About an hour
How Much Will It Hurt?
The local anesthetic will block the pain during the biopsy. Afterwards, you may feel sore where the biopsy was taken. Ask your doctor which pain reliever is right for you.
At the Care Center
You will be monitored for a few hours after your biopsy. You will be asked to remain lying down to reduce the chance of bleeding. Your pulse and blood pressure will be monitored. Your biopsy samples will be sent to the laboratory for testing. You will be sent home when you are feeling well and the doctor feels that it is safe.
When you return home you may have to avoid lifting or exercise until the biopsy area is healed. Follow any instructions on cleaning the incision site to avoid infection.
Call Your Doctor
Contact your doctor if your recovery is not progressing as expected or you develop complications, such as:
- Bloody urine 24 hours after biopsy or a lot of blood in the urine
- Difficulty urinating
- Signs of infection, including fever and chills
- Pain that is worse at biopsy site
- Pain that you cannot control with the medications that you were given
- A constant urge to urinate
- Pain or burning when you urinate
- Redness or drainage at biopsy site
If you think you have an emergency, call for emergency medical services right away.
National Institute of Diabetes and Digestive and Kidney Diseases
National Kidney Foundation
The Kidney Foundation of Canada
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