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M62.2 – Ischemic Muscle Infarction: Causes & Treatment
M62.2 is the ICD-10 code for ischemic infarction of muscle. It refers to the death of skeletal muscle tissue caused by insufficient blood supply.
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M62.2 is the ICD-10 code for ischemic infarction of muscle. It refers to the death of skeletal muscle tissue caused by insufficient blood supply.
What is M62.2 – Ischemic Infarction of Muscle?
The ICD-10 code M62.2 refers to ischemic infarction of muscle, a condition in which skeletal muscle tissue dies due to an inadequate blood supply and resulting oxygen deprivation. Similar to a myocardial infarction of the heart, the lack of oxygen causes irreversible damage to the affected muscle tissue. This is a rare but potentially serious condition, occurring most frequently in patients with pre-existing vascular disease or diabetes mellitus.
Causes
Ischemic muscle infarction results from a reduction or complete interruption of blood flow to a muscle. Common causes include:
- Atherosclerosis: Narrowing of supplying arteries due to plaque buildup
- Thrombosis or embolism: Blood clots that suddenly block blood vessels
- Diabetic microangiopathy: Damage to small blood vessels in patients with diabetes mellitus
- Compartment syndrome: Increased pressure within a muscle compartment that cuts off circulation
- Vasculitis: Inflammatory diseases affecting blood vessels
- Severe hypotension: Prolonged low blood pressure compromising muscle perfusion
Symptoms
The clinical presentation of ischemic muscle infarction varies depending on the affected muscle and the extent of ischemia:
- Sudden, severe muscle pain in the affected area
- Swelling and hardening of the muscle
- Restricted movement of the affected limb
- Muscle wasting (atrophy) in advanced stages
- General symptoms such as fever and elevated inflammatory markers in extensive necrosis
- Myoglobinuria: Brown discoloration of urine due to released myoglobin (in extensive necrosis)
Diagnosis
Diagnosis of ischemic muscle infarction requires a combination of clinical examination, laboratory testing, and imaging:
- Laboratory values: Elevated creatine kinase (CK), lactate dehydrogenase (LDH), and myoglobin in the blood indicate muscle damage
- MRI (Magnetic Resonance Imaging): Gold standard for visualizing muscle ischemia and necrosis
- Ultrasound: Assessment of swelling and tissue changes
- Biopsy: Tissue sampling for histological confirmation in unclear cases
- Angiography: Imaging of blood vessel supply when vascular occlusion is suspected
Treatment
Treatment is directed at the underlying cause and the extent of muscle damage:
Causal Treatment
- Restoration of blood flow through revascularization (e.g., thrombolysis, catheter intervention, vascular surgery)
- Treatment of the underlying condition (e.g., optimization of diabetes management, anticoagulation therapy)
- Fasciotomy in compartment syndrome to relieve pressure
Symptomatic and Supportive Treatment
- Pain management with analgesics
- Immobilization of the affected limb
- Adequate fluid intake to protect the kidneys from myoglobin-induced injury
- Physiotherapy for rehabilitation and preservation of muscle function
Prognosis
The prognosis of ischemic muscle infarction depends strongly on the underlying cause, the extent of necrosis, and the speed of treatment. Prompt therapy can minimize permanent functional limitations. However, extensive necrosis may result in lasting muscle loss. In rare cases, acute kidney injury due to myoglobinuria may occur and require intensive medical care.
References
- World Health Organization (WHO): International Classification of Diseases, 10th Revision (ICD-10), Code M62.2 – Ischemic infarction of muscle.
- Longo, D.L. et al.: Harrison's Principles of Internal Medicine, 20th Edition. McGraw-Hill Education, 2018 – Chapter on Muscle Disorders and Muscle Ischemia.
- Grigoriadis, E. et al.: Diabetic Muscle Infarction – A Systematic Review. In: Journal of Diabetes and its Complications, 2000; 14(4): 182–187.
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