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Septic arthritis — ABEM Board MCQ

Instant feedback + full explanation. One question, done properly.

ModerateMusculoskeletal/Orthopedic emergenciesSeptic arthritisABEM Board

A 63-year-old man presents as triage level 2 with fever and an acutely swollen right knee. He has diabetes, temperature 39.1°C, limited range of motion, WBC 18,000/microL, and x-ray shows no fracture. Which of the following is the most appropriate next step in management?

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: D — Urgent arthrocentesis before antibiotics if this does not delay treatment

Septic arthritis requires synovial fluid analysis and early antibiotics; arthrocentesis should be performed promptly.

Reference: IDSA septic arthritis guidance; ABEM EM Model