Acute Compartment Syndrome

A limb can have a palpable pulse and still be losing muscle and nerve tissue. Acute compartment syndrome develops when pressure rises inside a closed fascial space, first obstructing venous drainage and then reducing the pressure gradient that drives blood through the capillary bed. The result is progressive ischemia, not necessarily immediate loss of flow in the major artery. For the RN, the most useful pattern is mechanism plus trajectory plus serial examination. A tibial fracture, crush injury, reperfusion event, hemorrhage, tight external device, or prolonged compression creates the risk. Worsening pain—especially pain provoked by passive stretch—tense swelling, paresthesia, or a new motor or sensory change makes the pattern more concerning. A normal distal pulse does not clear the patient, and waiting for pallor, paralysis, or pulselessness can allow irreversible injury to develop. Suspected acute compartment syndrome requires immediate escalation to the orthopedic, trauma, or other designated surgical team while the nurse supports perfusion, removes or loosens external compression according to emergency protocol, performs and documents repeated examinations, and prepares the patient for possible fasciotomy. Pressure measurement may help when...