What is a knee tap?

What is a knee tap?

Joint aspiration (also called arthrocentesis) is a procedure that sucks fluid from your knee, hip, shoulder, or other joints. Your doctor may do it to help with swelling and fluid related to an injury, infection, or another health condition. Joint aspiration can also help to diagnose arthritis or other joint problems.

Is knee aspiration painful?

Most people find the procedure tolerable. However, the procedure can hurt if the needle touches the joint surface. Your doctor will try to avoid these surfaces, but sometimes this cannot be prevented. If you feel discomfort, it will generally be brief.

How do you tap a knee effusion?

Stretch the skin over the insertion site, and insert the needle briskly into the joint space while gently aspirating until synovial fluid enters the syringe (in an adult of average size, this usually occurs at 1-2 cm). Relaxation of the quadriceps muscle facilitates insertion of the needle.

What happens after knee aspiration?

The aspiration site may be tender or sore for a few days after the joint aspiration procedure. Take a pain reliever for soreness as recommended by your healthcare provider. Aspirin or certain other pain medicines may increase the chance of bleeding. Be sure to take only recommended medicines.

What does fluid in the knee feel like?

swelling and redness of the skin surrounding your kneecap. joint stiffness and difficulty straightening or bending your leg. pain and tenderness, especially when you put weight on your knee. the knee will feel warmer than the opposite knee.

Can an xray show fluid on the knee?

Soft-tissue changes: X-rays are best at showing bone, but there is much more besides bone that can be seen on an X-ray. They can also show signs of soft-tissue swelling and excess fluid within the knee.

What is better for arthritis knee pain heat or cold?

Heat can relax muscles and help lubricate joints. Heat therapy may be used to relieve muscle and joint stiffness, help warm up joints before activity, or ease a muscle spasm. Cold can reduce inflammation, swelling, and pain related to arthritis and activity.


Andrey is a coach, sports writer and editor. He is mainly involved in weightlifting. He also edits and writes articles for the IronSet blog where he shares his experiences. Andrey knows everything from warm-up to hard workout.