Compartment syndrome

Disease Description (Causes and Pathophysiology, Main Symptoms)

• Definition: An emergency condition affecting limbs in which compartments are formed by fascia surrounding muscles, nerves, and blood vessels, and pressure within the compartment rises, blocking blood flow and causing tissue ischemia and necrosis. There are acute and chronic (exertional) types.
• Pathophysiology: When pressure within a compartment rises due to trauma, bleeding, edema, external compression, or other causes, capillary and arterial blood flow decreases, resulting in insufficient oxygen supply to the tissues; necrosis of muscles and nerves may occur within 4–8 hours. As an auxiliary diagnostic indicator, compartment pressure may be measured (generally, ≥30 mmHg is considered suspicious), or a difference between diastolic blood pressure and compartment pressure (delta pressure = diastolic blood pressure − compartment pressure) of ≤30 mmHg is considered an indication for treatment.
• Main causes: Fractures (especially tibial and upper-extremity fractures), severe soft-tissue injury, frostbite, burns, prolonged compression, bleeding tendencies such as anticoagulant use or hemophilia, and external compression from casts or dressings.
• Main symptoms: Pain (especially excessively severe pain that is not relieved by rest or analgesics), swelling and taut skin, pallor, sensory disturbances (tingling), motor weakness or paralysis, and, in the late stage, loss of peripheral pulses (pulselessness). In the chronic type, pain is triggered by exercise and improves with rest.

Treatment Methods (Standard Treatment, Medications, Procedures/Surgery, Lifestyle Management and Precautions)

• Emergency measures (immediately if suspected)
  • Immediately remove compressive elements such as bandages, casts, and dressings.
  • Keep the limb at heart level (excessive elevation may worsen perfusion).
  • Maintain hemodynamic status (hypotension can worsen tissue perfusion)—preserve blood pressure with fluids or other measures if necessary.
• Definitive treatment
  • Acute confirmed cases: Immediate fasciotomy (compartment release) is standard. The compartment is opened to relieve pressure and prevent progression of necrosis. Debridement of necrotic tissue and subsequent closure or skin grafting may be performed if necessary.
  • As an aid to diagnosis, compartment pressure measurement (using a direct measurement device with a needle) is performed along with observation of the clinical course.
• Chronic (exertional) compartment syndrome
  • Nonsurgical treatment: Exercise modification, physical therapy, anti-inflammatory drugs, and changes to the activity plan. Fasciotomy may be considered if symptoms persist and functional limitations are significant.
• Medication/Conservative treatment
  • Pain control (analgesics), antibiotics if necessary (when there is an open wound or a risk of infection after surgery), and hemodynamic stabilization.
  • For patients taking anticoagulants, bleeding risk must be assessed and the treatment adjusted as necessary.
• Follow-up care and rehabilitation
  • Wound care, infection prevention, and physical and occupational therapy to restore upper- and lower-extremity function.
• Precautions and complications
  • If treatment is delayed, permanent muscle and nerve damage (motor and sensory disturbances), limb contracture, chronic pain, and renal failure (in cases of rhabdomyolysis due to muscle necrosis) may occur.
  • Postoperative bleeding, infection, scarring, and nerve injury may occur.

Checklist Before an Outpatient Visit (Items to Prepare for the Consultation and Tests, and Examples of Symptom Records)

• Items/materials to prepare
  • A list of all medications currently being taken, including anticoagulants and antiplatelet drugs
  • The date, time, and circumstances of the recent trauma (record the time)
  • Previous medical certificates and imaging (fracture, CT, MRI, X-ray), as well as blood test results if available
  • Photos of bandages, casts, and wounds (taken with a smartphone)
  • The time pain began and its characteristics (pain score and changes with exercise or rest), and the time sensory or motor changes began
• What the patient (or caregiver) should observe before the visit
  • Pain intensity (0–10), aggravating factors, and whether it is relieved
  • The rate at which swelling is progressing, skin color (pallor or bluish discoloration), and changes in temperature
  • Reduced sensation in the hands or feet (numbness or tingling), decreased muscle strength, and changes in urination or urine color (when muscle necrosis is suspected)
  • Whether a bandage or cast is present and how long it has been worn

Examples of General Questions to Ask the Doctor

• "Is my current condition an emergency requiring surgery? What risks are there if surgery is delayed?"
• "What surgical method is expected, and approximately how long will recovery take?"
• "What are the main complications of the surgery, and how likely are they to occur?"
• "How will my pain be controlled? Which medications should I take, and for how long?"
• "When can I expect to resume daily activities, exercise, and work?"

Examples of Condition-Specific Questions

• "What are my compartment pressure (or diastolic blood pressure − compartment pressure) results, and at what level would you recommend immediate fasciotomy?"
• "I take anticoagulants (or have a bleeding tendency such as hemophilia). In this case, how do you plan to make the surgical decision and manage bleeding?"