Find information on medical topics, symptoms, drugs, procedures, news and more, written for the health care professional.

Arthrocentesis of the metacarpophalangeal or interphalangeal joint.

Arthrocentesis of the metacarpophalangeal or interphalangeal joint.
Arthrocentesis of the metacarpophalangeal or interphalangeal joint.

Synovial fluid is withdrawn from the metacarpophalangeal or interphalangeal joint. The patient's hand is pronated and the interphalangeal joints are flexed 15 to 20°. Distal traction is applied to the finger. Needle entry occurs along the dorsal portion of the joint, just medial or lateral to the extensor tendon.