Synovial biopsy

Alternative names:

biopsy of the synovial membrane

How the test is performed:

The test may be done in the health care provider's office. The joint to be biopsied will be placed so there is easy access. The joint will be injected with a local anesthetic. Then an instrument used to force fluid from a cavity (trocar) is inserted into the joint space. The biopsy needle is inserted through the trocar and twisted to cut out the tissue segment. The biopsy needle is removed and the trocar is removed. The biopsy site is cleansed and pressure and bandage are applied.

How to prepare for the test:

Inform the health care provider of any drug allergies you have, which medications you are taking, if you have bleeding problems, and if you are pregnant. You must sign a consent form.

Infants and children:
The physical and psychological preparation you can provide for this or any test or procedure depends on your child's age, interests, previous experience, and level of trust. For specific information regarding how you can prepare your child, see the following topics as they correspond to your child's age:

• infant test or procedure preparation (birth to 1 year)
• toddler test or procedure preparation (1 to 3 years)
• preschooler test or procedure preparation (3 to 6 years)
• schoolage test or procedure preparation (6 to 12 years)
• adolescent test or procedure preparation (12 to 18 years)

How the test will feel:

With the local anesthetic, you will feel a prick and a burning sensation. As the trocar is inserted, there will be some discomfort.

Why the test is performed:

The test helps diagnose gout, bacterial infections, and other infections.