Compartment syndrome occurs when excessive pressure builds up inside an enclosed muscle space in the body. Compartment syndrome usually results from bleeding or swelling after an injury. The dangerously high pressure in compartment syndrome impedes the flow of blood to and from the affected tissues. It can be an emergency, requiring surgery to prevent permanent injury.
What Happens in Compartment Syndrome?
Groups of organs or muscles are organized into areas called compartments. Strong webs of connective tissue called fascia form the walls of these compartments.
After an injury, blood or edema may accumulate in the compartment. The tough walls of fascia cannot easily expand, and compartment pressure rises, preventing adequate blood flow to tissues inside the compartment. Severe tissue damage can result, with loss of body function or even death.
The legs, arms, and abdomen are most prone to developing compartment syndrome.
Compartment Syndrome Causes
Acute compartment syndrome is the most common type of compartment syndrome. About three-quarters of the time, acute compartment syndrome is caused by a broken leg or arm. Acute compartment syndrome develops rapidly over hours or days.
Compartment syndrome can develop from the fracture itself, due to pressure from bleeding and edema. Or compartment syndrome may occur later, as a result of treatment for the fracture (such as surgery or casting).
Acute compartment syndrome can also occur after injuries without bone fractures, including:
- Crush injuries
- Overly tight bandaging
- Prolonged compression of a limb during a period of unconsciousness
- Surgery to blood vessels of an arm or leg
- A blood clot in a blood vessel in an arm or leg
- Extremely vigorous exercise, especially eccentric movements
Another form of compartment syndrome, called chronic compartment syndrome, develops over days or weeks. Also called exertional compartment syndrome, it may be caused by regular, vigorous exercise. The lower leg, buttock, or thigh is usually involved.
Compartment Syndrome Symptoms
Acute compartment syndrome usually develops over a few hours after a serious injury to an arm or leg. Some symptoms of acute compartment syndrome include:
- A new and persistent deep ache in an arm or leg
- Pain that seems greater than expected for the severity of the injury
- Numbness, pins-and-needles, or electricity-like pain in the limb
- Swelling, tightness and bruising
Remember the 5 P’s!!
- Pulse Deficit
Compartment Syndrome Treatment
Treatments for compartment syndrome focus on reducing the dangerous pressure in the body compartment. Dressings, casts, or splints that are constricting the affected body part must be removed.
Most people with acute compartment syndrome require immediate surgery to reduce the compartment pressure. A surgeon makes long incisions through the skin and the fascia layer underneath (fasciotomy), releasing excessive pressure.
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