Severe hypothermia is core body temperature less than 28C
Signs of hypothermia include:
- muscle stiffness
- fixed and dilated pupils
Metabolic acidosis is common and may predispose to pancreatitis.
ECG changes in hypothermia include:
- J waves
- long PR, QT and QRS
- under 28C increasing risk of VF
Primary hypothermia is hypothermia due to exposure.
Secondary hypothermia is hypothermia due to a medical illness, for example hypothyroidism or hypoglycaemia
Treatment is passive rewarming for mild to moderate hypothermia and core rewarming (eg peritoneal lavage) for severe hypothermia.
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