Hypothermia is a recognized complication of severe hypoglycaemia, but its prevalence and characteristics are poorly studied. For this reason, this study aimed to evaluate hypothermia in severely hypoglycaemic patients.
A retrospective chart review was performed including all patients discharged between 2007 and 2010 from the Emergency Department of the Geneva University Hospital with a diagnosis of severe hypoglycaemia.
Hypothermia was identified in 30 (23.4%) out of 128 patients with severe hypoglycaemia. Its incidence was not affected by age, type of diabetes, season or time of day (day/night). Using linear regression, the lowest recorded temperature was associated with the Glasgow coma scale (GCS) score (r2 = 13.8%, P < 0.0001) and inversely associated with the leukocyte count (r2 = 13.1%, P = 0.001).
Hypothermia is a frequent sign of severe hypoglycaemia in patients with diabetes. The associations between hypothermia and the GCS score and the leukocyte count suggest that it is a marker of hypoglycaemia severity and/or duration. Hypothermia may represent an important compensatory mechanism in severe hypoglycaemia, reflecting a decrease in energy demand during glucose deprivation.