Review Question - QID 5287

A 13-year-old boy falls out of a tree and sustains the injury seen in Figures A and B. He is taken to the OR for fixation of his fracture. The next morning, the patient’s blood pressure is 185/105 mm Hg and pulse rate is 130. He complains of pain that is not improved with opiates. On physical exam, the foot is firm. The decision is made to obtain compartment pressures to rule out compartment syndrome of the foot. Which of the following paths in Figure C marks the appropriate location to measure the central compartment, and what would be considered abnormal values?