CT-Guided Kidney Biopsy with Intravenous Contrast
A CT-guided kidney biopsy uses imaging guidance and intravenous contrast to collect a small kidney tissue sample for examination.
["This procedure samples kidney tissue to help identify the cause of certain kidney diseases."]
Key facts at a glance
- LOINC
- 89621-7
- Short code
- CT Guided Kidney Bx--W contr IV
- Synonyms
- CT Guided Kidney Bx--W contr IV
- Category
- liver
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- ct
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
What is this test?
A CT-guided kidney biopsy is a minimally invasive procedure in which a needle is guided into the kidney using computed tomography (CT) images. A small tissue sample is removed and examined under a microscope to evaluate kidney disease. Intravenous contrast may be given to help improve the visibility of the kidney and nearby blood vessels during the procedure.
Why might I need this test?
A kidney biopsy may be recommended when blood or urine tests suggest an unexplained kidney problem, or when imaging shows an abnormal area in the kidney. It can help clarify the type of kidney disease and guide treatment decisions. The need for a biopsy is based on the overall medical evaluation and the risks of the procedure.
How is the test performed?
You may receive intravenous contrast through a vein, then lie on a CT table while the kidney is located with imaging. After numbing the skin, the doctor inserts a biopsy needle and removes a small tissue sample. The sample is sent to a pathology laboratory for examination, and the procedure site is checked for bleeding or other complications.
How do I prepare for the test?
Follow the instructions provided by the imaging and procedure team, including any fasting or medication instructions. Tell the team about kidney function problems, prior contrast reactions, allergies, bleeding disorders, pregnancy, and medicines such as blood thinners. The team will explain the procedure, its risks, and how long you should remain for observation afterward.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
CT-guided kidney biopsy
Frequently asked questions
Is a CT-guided kidney biopsy painful?
What are the main risks of a kidney biopsy?
How long does it take to get the biopsy results?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy