Final answer:
Arthrocentesis is the procedure used to obtain fluid from a joint, necessary for diagnosing conditions like gout, arthritis, or infections.
Step-by-step explanation:
Procedure to Obtain Fluid from a Joint
To obtain fluid from a joint, the correct procedure is D. Arthrocentesis. This medical procedure is used to collect synovial fluid from a joint capsule. It is commonly performed to diagnose the cause of joint swelling or pain. This may include the analysis for conditions like gout, arthritis, or infections. Let's review the options listed: A. Tympanocentesis involves the middle ear, B. Pneumonocentesis is not a common medical term, C. Thoracentesis is used to collect fluid from the pleural space around the lungs, and E. Paracentesis is performed to remove fluid from the abdominal cavity.