Compartment Syndrome – Causes, Symptoms & Treatment
Compartment syndrome is a medical emergency in which dangerous pressure buildup within a muscle compartment cuts off blood supply, leading to tissue damage and potential permanent injury.
Things worth knowing about "Compartment syndrome"
Compartment syndrome is a medical emergency in which dangerous pressure buildup within a muscle compartment cuts off blood supply, leading to tissue damage and potential permanent injury.
What is Compartment Syndrome?
Compartment syndrome is a serious and potentially limb-threatening condition in which pressure within a closed muscle compartment rises to a level that compromises blood flow and nerve function. Muscles, nerves, and blood vessels are enclosed within compartments surrounded by tough, inelastic connective tissue called fascia. When pressure builds up inside these rigid boundaries, the resulting ischemia (lack of oxygen supply) can cause irreversible damage to muscles and nerves if not treated promptly.
Causes
Compartment syndrome can occur acutely following trauma or chronically due to repetitive exertion. Common causes include:
- Fractures: especially of the lower leg (tibia/fibula) or forearm
- Crush injuries and severe soft tissue trauma
- Burns causing tissue swelling
- Tight casts or bandages that restrict swelling
- Vascular injuries leading to bleeding within the compartment
- Reperfusion injury after restoring blood flow to an ischemic limb
- Chronic exertional compartment syndrome: occurs in athletes during intense physical activity
Symptoms
The classic signs of acute compartment syndrome are often described using the 5 Ps:
- Pain: severe, disproportionate pain that worsens with passive stretching of the muscles
- Pressure: the compartment feels tense and hard to the touch
- Paresthesia: tingling or numbness due to nerve compression
- Paralysis: muscle weakness or loss of movement in advanced cases
- Pallor: pale or mottled skin as a late sign
A key warning sign is pain that is out of proportion to the injury and intensifies with passive movement of the affected limb.
Diagnosis
Diagnosis is primarily clinical, but the following tools support assessment:
- Clinical examination: assessing pain, tension, sensation, and motor function
- Compartment pressure measurement: using a pressure monitor inserted into the compartment. A pressure above 30 mmHg, or a delta pressure (diastolic blood pressure minus compartment pressure) below 30 mmHg, is considered critical.
- Laboratory tests: elevated creatine kinase (CK) indicates muscle breakdown (rhabdomyolysis)
- Imaging: MRI or ultrasound may be used as supplementary tools but are not the primary diagnostic method
Treatment
Acute compartment syndrome is a medical emergency requiring immediate intervention:
Initial Conservative Measures
- Remove or split any restrictive dressings, casts, or splints immediately
- Position the affected limb at the level of the heart (not elevated, as this may reduce perfusion pressure)
- Close monitoring of pressure values and neurological status
Surgical Treatment: Fasciotomy
The only definitive treatment for acute compartment syndrome is an emergency fasciotomy: a surgical procedure in which the fascia of the affected compartment is cut open to relieve pressure. The procedure must be performed as soon as possible – ideally within 6 hours of symptom onset – to prevent permanent muscle and nerve damage.
Chronic Exertional Compartment Syndrome
In chronic cases, often seen in endurance athletes, conservative management including rest, physiotherapy, and activity modification may be attempted first. If symptoms persist, fasciotomy is also an effective treatment option.
Complications
If left untreated, compartment syndrome can lead to severe and irreversible consequences:
- Permanent muscle loss and contractures (Volkmann contracture)
- Nerve damage and lasting paralysis
- Acute kidney injury due to rhabdomyolysis (myoglobin release)
- In severe cases, amputation of the affected limb
References
- Torlincasi, A. M. et al.: Acute Compartment Syndrome. StatPearls Publishing, NCBI Bookshelf, 2023. Available at: https://www.ncbi.nlm.nih.gov/books/NBK430721/
- Duckworth, A. D. & McQueen, M. M.: The Diagnosis of Acute Compartment Syndrome: A Review. European Journal of Trauma and Emergency Surgery, 2017.
- Wall, C. J. et al.: Acute Compartment Syndrome: Diagnosis and Management. Australian and New Zealand Journal of Surgery, 2010.
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