Review Question - QID 219238

A 37-year-old female presents to the emergency room one month after her right thigh was rolled between the side of a forklift machine and a wall when a coworker was backing up on the factory floor. She was able to ambulate immediately after the event, however, has noted continued dull pain and swelling in her thigh. She denies any fevers, chills, increasing erythema, or drainage. On exam, she does not have any overlying skin changes but has palpable, deep fluctuance with presenting radiographs shown in Figure A. A CT scan with contrast is obtained in the emergency department shown in Figures B and C. Which of the following is the next best step in management?