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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.

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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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