Which term describes drawing out fluid from a joint space with a needle?

• A. Aspiration
• B. Auscultation
• C. Arthrocentesis
• D. Audiometry

Answer: (C)

Drawing fluid from a joint space with a needle is called arthrocentesis. This procedure involves inserting a needle into the joint and aspirating synovial fluid for analysis or to relieve excess fluid. Arthrocentesis is the joint-specific term for obtaining synovial fluid, whereas aspiration is a general term for drawing any fluid from the body. The other options refer to unrelated functions: auscultation means listening to internal sounds with a stethoscope, and audiometry is a hearing test.