Features Suggesting Myxoedema Coma in the Patient with Hypothermia
- Preceding symptoms of hypothyroidism (weight gain with reduced appetite, dry skin and hair loss) or confirmed hypothyroidism
- Previous radioactive iodine treatment or thyroidectomy for hyperthyroidism
- Thyroidectomy scar
- Hyponatraemia (plasma sodium <130 mmol/L)
- Macrocytosis
- Failure of core temperature to rise 0.5°C per hour with external rewarming
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