How To Do Metacarpophalangeal and Interphalangeal Joint Arthrocentesis By Alexandra Villa-Forte, MD, MPH, Cleveland Clinic Reviewed / Revised Jun 2023 View Patient Education Indications Contraindications Complications Equipment Additional Considerations Relevant Anatomy Positioning Step-by-Step Description of Procedure Aftercare Warnings and Common Errors Tips and Tricks Topic Resources Arthrocentesis of the Metacarpoph... Arthrocentesis of the Proximal... Arthrocentesis of the metacarpophalangeal joints and interphalangeal joints of the hand is the process of puncturing the finger joints with a needle to withdraw synovial fluid.