Review Question - QID 220097

A 72-year-old male presents to your office with 3 months of worsening left hip pain. About two days ago, the pain became unbearable, and he is now unable to ambulate and primarily utilizes a wheelchair. An AP radiograph of the left hip is shown in Figure A. Approximately 10 years ago, he underwent a left total hip arthroplasty with another surgeon who has now retired. He denies any issues with his left hip since it was replaced and notes he ambulates independently at baseline without assistive devices. Denies fevers, chills, or a draining wound. Laboratory workup demonstrates an erythrocyte sedimentation rate (ESR) of 92 mm/hr (normal = <30 mm/hr), C-reactive protein (CRP) level of 25 mg/L (normal = <2.5 mg/L), cobalt level of 0.6 µg/L (normal = <0.7 µg/L), and chromium level of 0.8 µg/L (normal = <0.4 µg/L). An ultrasound-guided left hip aspiration is performed in the office, and synovial fluid analysis is performed. Manual cell count shows a white blood cell count (WBC) of 6,000/µL with 92% PMNs. What is the most appropriate next step?