Compartment syndrome
Compartment syndrome can be acute or chronic; it is characterized by an increase in pressure in the muscle compartments of the foot or leg, also known as muscle compartments. While acute compartment syndrome can be potentially very serious, exertional compartment syndrome is mainly responsible for pain during sports activities.
Definition and Pathophysiology of Chronic Compartment Syndrome in the Foot
Chronic compartment syndrome refers to the increase of pressure in the muscle compartment inside a muscular compartment enclosed by a rigid fascia, causing ischemic muscle distress. In the foot and the leg, the muscle compartments are separated by a non-extensible aponeurosis where the accumulation of edema or a hematoma can lead to compression of the muscles.
Acute compartment syndrome is related to trauma, generally high-energy, and is potentially serious with a poor functional prognosis. Understanding the anatomy of the foot, ankle, and leg is essential to grasp the pathophysiological mechanisms involved in this ischemic syndrome.
There are also compartment syndromes that go unnoticed initially, at the level of the deep and posterior compartments of the leg, potentially responsible for post-traumatic sequelae such as claw toes.
Symptoms and Clinical Signs
The symptoms and clinical signs of exertional compartment syndrome are characterized by intense and painful discomfort during exercise, localized in the same compartment of the lower limb, accompanied by a sensation of vascular tension and numbness of the foot. The clinical examination may reveal local swelling of the calf, leg, or foot, sometimes causing a slight change in gait and superficial venous insufficiency, as well as muscle cramps and paresthesia, or numbness, during physical activity.
These inflammatory manifestations may resemble other conditions such as tarsal tunnel syndrome or venous thrombosis. When these painful signs appear regularly, it is important to consult a specialist to obtain an accurate diagnosis and avoid ischemic complications.
Diagnostic Methods and Additional Examinations
The diagnosis is suspected during the interview and then by a clinical examination. The imaging assessment shows no particular abnormalities. The diagnosis is confirmed by measuring the intramuscular pressure of the suspected compartment using a pressure probe inserted into the muscle compartment. The MRI of the foot or leg makes it possible to assess any potential muscle damage. In cases of distress, the muscle tends to become infiltrated with fat. The MRI thus allows an estimation of fatty muscle infiltration and evaluation of the percentage of fatty infiltration.
Dynamic tests with palpation of the arterial pulse, carried out before and after exertion, help to distinguish this syndrome from other pathologies. In general, in exertional or chronic compartment syndrome, pulses are present and sensory neurological disorders are prominent.
Treatment Options
Patients affected have several therapeutic options, ranging from non-surgical approaches to surgical interventions. As a first-line treatment, conservative management consists of adapting physical activity, introducing periods of rest with elevation of the lower limb, attending rehabilitation sessions including stretching, and, if necessary, using anti-inflammatories and analgesics to relieve pain.
Elastic compression can improve venous return. When this management proves insufficient, a surgical intervention may be considered, usually under local anesthesia, in the form of a minimally invasive fasciotomy that allows pressure in the compartment to be released while preserving the muscle structure. This procedure can be performed using percutaneous surgery.
Compartment Syndrome and Sports Activities
Chronic compartment syndrome particularly affects athletes who practice activities with repeated impact such as running, mountain biking, circuit motorcycling, or motocross. Runners, football players and dancers can also be exposed to this muscular condition due to the strain placed on their feet and calves.
Why Choose The Foot Clinic?
In case of suspected chronic compartment syndrome of the foot, we can perform the surgical treatment of opening the compartment or decompression fasciotomy, if the pain is resistant to functional treatment.
However, it is necessary to perform pressure measurement in the suspected muscle compartment(s) to confirm the diagnosis before the surgery. These measurements are generally carried out by a sports medicine physician experienced in this condition.
Potential Complications and Sequelae
Without appropriate treatment, chronic compartment syndrome can lead to permanent vascular and nerve complications. Prolonged compression of neurovascular structures can result in ankle algodystrophy, irreversible nerve damage, or even ischemic necrosis requiring amputation in extreme cases of acute compartment syndrome. Complications also include the risk of venous thrombosis, pulmonary embolism, and chronic venous insufficiency.
Post-operative monitoring is crucial to prevent these hemorrhagic or thrombotic complications, as we detail in our guide on common post-operative complications.
Leg fractures, particularly open leg fractures, are at risk of acute compartment syndrome and require close post-operative monitoring.
FAQ – Frequently Asked Questions about Chronic Compartment Syndrome in the Foot
The syndrome may be due to repeated strain during intense sports activities, the formation of edema or a hematoma after minor trauma, or blood clotting disorders affecting the veins and arteries of the lower limb.
It varies depending on the extent of muscle involvement and the surgical method used. Postoperative rehabilitation is necessary for muscle recovery.
At the onset of repeated pain, calf cramps, and abnormal sensations during exertion, consulting a foot specialist will help determine the treatment strategy best suited to your situation and minimize the risk of functional after-effects.