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Understanding Prepatellar Bursa Aspiration

This outpatient procedure relieves pain and swelling in the knee caused by bursitis, or inflammation of the bursa. The bursa is a fluid-filled sac between the skin and patella (commonly called the kneecap).


In preparation for the procedure, the patient is positioned so that the knee can be bent comfortably. Local anesthesia is administered to numb the injection site.

Removing Fluid

A needle is inserted and is carefully pushed into the bursa. Excess fluid is drained through the needle to reduce swelling. Corticosteroid medication may also be injected in patients with chronic bursitis.

End of Procedure and Recovery

When the injection is complete, the needle is slowly withdrawn, and the injection site may be covered with a small bandage. Extended pain relief usually begins within two to three days of the injection.

Related Resources:

Prepatellar Bursitis (Kneecap Bursitis)

The animation content provided is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified healthcare provider with any specific questions you may have regarding a medical condition or procedure.