Baker’s Cyst Aspiration and Injection:
- Purpose- Relieve pain and swelling behind the knee, the feeling of tightness or fullness that worsens when standing, and alleviate the difficulty of bending at the knee.
- Overview- Cyst aspiration is the removal of excess fluid, and a steroid is often injected to fill the cyst and reduce the chance of it returning. Baker’s cysts are membrane-lined, fluid-filled lumps that develop behind the knee. Common causes for Baker’s cysts include arthritis, torn cartilage in the knee, and advanced osteoarthritis. This procedure may be done with image guidance.
- Before the procedure- No special preparation is needed for this procedure.
- Details- The procedure begins with the application of an anesthetic on top of the cyst. The cyst is punctured with a needle in order to begin aspiration. Then, using a syringe, the fluid is drained from the base of the cyst. A steroid is often injected into the empty cyst in order to reduce inflammation.
- After the procedure- Numbness should only last a few hours until the anesthetic wears off. Once the anesthetic wears off, there may be mild discomfort that lasts for a couple of days. There is a chance of the cyst returning. Possible side effects include bruising, swelling, or risk of infection at the injection site.