• Gert-Jan van der Ploeg, J Carel Goslings, Beat H Walpoth, and Joost J L M Bierens.
• VU University Medical Centre, De Boelelaan 1117, 1007 MB Amsterdam, The Netherlands. gj.vdploeg@quicknet.nl
• Resuscitation. 2010 Nov 1;81(11):1550-5.

Aim Of The StudyAccidental hypothermia (AH) is a complex and life threatening condition. Knowledge about epidemiology, rewarming treatments, complications and outcome is limited. This study was initiated to obtain data on causes, rewarming treatments and complications.MethodsA retrospective cohort study of all patients with a body temperature ≤ 35°C admitted to the Emergency Department (ED) of the VU university medical centre, Amsterdam, The Netherlands, between January 1, 2000 and August 31, 2008. A predefined set of epidemiological and clinical data was retrieved.ResultsEighty-four patients were included (median age: 47 years). Categories of hypothermia included immersion (18), submersion (29) and exposure to cold (37); concomitant factors were intoxication (26), trauma (40) and homelessness (7). Temperature at admission in the ED was 31.6 ± 2.6°C (mean ± SD), lowest temperature 24.2°C. Fourteen different rewarming treatments were used resulting in a wide range of rewarming speeds. Seventy-nine complications occurred: pulmonary, renal and neurological complications in 20, 17 and 10 patients respectively. Seventeen patients had 2 or more late complications. Twenty-four patients (28.6%) died: 10 during rewarming and 14 after rewarming was completed. Prognosis was poor in older and colder patients and after indoor exposure and submersion.ConclusionAH is a rare diagnosis in an inhomogeneous population, treated with a large variety of rewarming techniques. Most complications and death occurred late, after rewarming was completed. Because individual teams gain little clinical experiences, we suggest multiple centre data collection as a first step towards an evidence-based standard of care.Copyright © 2010 Elsevier Ireland Ltd. All rights reserved.

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