Final answer:
The post-exercise compartment pressure indicating exertional compartment syndrome is typically above 15 mm Hg within 5 minutes after exercise and may exceed 30 mm Hg. This is measured in the same unit as blood pressure, mm Hg.
Step-by-step explanation:
The post-exercise compartment pressure that could indicate exertional compartment syndrome typically exceeds 15 mm Hg within 5 minutes of exercise cessation and may rise beyond 30 mm Hg. These values are juxtaposed against normal capillary hydrostatic pressure (CHP), which is approximately 35 mm Hg at the arterial end and declines to about 18 mm Hg at the venous end. Since the cardiovascular system pressures are expressed in millimeters of mercury (mm Hg), this same unit is also applied for measuring compartment pressure in potential cases of exertional compartment syndrome. It's important to recognize that normal pressures should return swiftly post-exercise, so sustained elevations are indicative of this condition.