Loss of pulses in injured limbs is a late sign of which condition?

• A. Early sign
• B. Late sign
• C. Not a sign
• D. Diagnostic only with imaging

Answer: (B)

The concept here is that loss of distal pulses signals severe limb ischemia due to rising pressure or vascular injury, and it is a late finding in compartment syndrome. Early on, tissues become ischemic first because intracompartmental pressure increases and impedes microcirculation, so the most reliable early clues are pain out of proportion to exam and pain with passive stretching, plus sensory changes. As pressure continues to build and ischemia worsens, perfusion to the limb deteriorates enough that arterial inflow fails, producing a pulseless limb. That pulseless state indicates advanced, time‑critical compromise and requires urgent action (typically emergent fasciotomy or surgical intervention) to save the limb. It’s important to note that pulses can be present even with compartment syndrome, so the absence of pulses is a late sign and should not be the sole determinant of diagnosis or intervention.