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Compartment Syndrome of the Foot. N. Craig Stone M.D. F.R.C.S.(C) Discipline of Orthopaedic Surgery. Introduction. Definition Pathophysiology Etiology Clinical Presentation Treatment Long term sequelae. Definition. Increased pressure within a closed fascial compartment
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Compartment Syndrome of the Foot N. Craig Stone M.D. F.R.C.S.(C) Discipline of Orthopaedic Surgery U of T Foot and Ankle Symposium 2002
Introduction • Definition • Pathophysiology • Etiology • Clinical Presentation • Treatment • Long term sequelae U of T Foot and Ankle Symposium 2002
Definition • Increased pressure within a closed fascial compartment • Sufficient magnitude to impede vascular inflow U of T Foot and Ankle Symposium 2002
Pathophysiology • Insult to muscle within a closed compartment • Intracellular swelling/Hematoma • Pressure rises and capillary perfusion drops • Vicious circle U of T Foot and Ankle Symposium 2002
Pathophysiology • Tissues vary in susceptibility to damage • Nerve < 4 hours • Muscle < 8 hours • After 8 hours irreversible damage U of T Foot and Ankle Symposium 2002
Pathophysiology • ? Critical pressure • Proportional to systemic blood pressure • Not a fixed number • Experimentally • Within 10mmHg of diastolic pressure • Injured tissue 20 mmHg U of T Foot and Ankle Symposium 2002
Fascial Anatomy of the Foot • At least 9 separate compartments • 4 are clinically relevant • Medial, central, lateral, interosseous U of T Foot and Ankle Symposium 2002
Etiology • Crush injuries / trauma • +/- fracture U of T Foot and Ankle Symposium 2002
Etiology • Temporary vascular occlusion • Trauma, thrombus • Altered consciousness • CNS • Drugs, alcohol U of T Foot and Ankle Symposium 2002
Clinical Presentation • History of injury / energy absorbed • Swelling • Pain • Passive stretch • Pallor, paresthesia, pulselessness, paralysis U of T Foot and Ankle Symposium 2002
Investigations • Compartmental pressure measurements • Whiteside technique • Arterial line setup • Commercially available monitors U of T Foot and Ankle Symposium 2002
Investigations • 1 sample vs continuous monitoring • Measure all four compartments • Don’t delay getting measurements if diagnosis is obvious U of T Foot and Ankle Symposium 2002
What number to we use? Fixed number (30 mmHg) VS. Variable (20 mmHG less than diastolic) U of T Foot and Ankle Symposium 2002
Treatment • Remove dressings • Do not excessively elevate the foot • Level of the heart • Analgesia • Have low threshold to proceed surgically U of T Foot and Ankle Symposium 2002
Treatment • Emergency fascial release • 3 incisions • 1 medial 2 Dorsal • Blunt and finger dissection • Divide fascia • Delayed closure • +/- skin grafting • Prophylactic releases U of T Foot and Ankle Symposium 2002
Missed Compartment Syndromes • Early • Myonecrosis • Renal concerns • Late • Deformities from contracture of necrotic muscle • Nerve Injury • Ulcerations U of T Foot and Ankle Symposium 2002
Summary • High index of suspicion • Careful with altered consciousness • Be aggressive to prevent long term sequelae U of T Foot and Ankle Symposium 2002