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Resuscitation. 2013 Apr;84(4):492-5. doi: 10.1016/j.resuscitation.2012.09.010. Epub 2012 Sep 14.

Emergency medical helicopter operations for avalanche accidents.

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1
Department of Anaesthesiology and Critical Care Medicine, Innsbruck Medical University Hospital, Anichstrasse 35, 6020 Innsbruck, Austria. p.mair@uki.at

Abstract

BACKGROUND:

In the European Alps emergency medical helicopter services are regularly involved in avalanche rescue missions. How the helicopter emergency medical system best supports avalanche rescue missions is controversial.

AIM OF THE STUDY:

To study advantages and limitations of the early dispatch of emergency medical helicopters after avalanche accidents.

METHODS:

Data on rescue mission characteristics and patterns and severity of medical emergencies were obtained for 221 helicopter avalanche rescue missions performed in the Austrian province of Tyrol between October 2008 and June 2011.

RESULTS:

A buried avalanche victim had to be searched for in only 12 (5.5%) of the 221 rescue missions, whereas medical emergencies were encountered at the scene in 24 missions (11%). Survival rate for totally buried victims extricated after helicopter arrival was significantly lower than for victims extricated before helicopter arrival (19% versus 74%, p=0.0002). In 124 missions (56%) no victim was present at the scene when the helicopter arrived. Medical emergencies involved normothermic cardiac arrest (n=11), severe accidental hypothermia (n=6), critical trauma (n=7) and hypothermia combined with critical trauma (n=1). Survival rate at hospital discharge was 27% for arrested normothermic patients and 50% for trauma and hypothermia patients.

CONCLUSIONS:

Medical emergencies are encountered at avalanche scenes twice as often as there is need to search for totally buried victims, clearly supporting the immediate dispatch of medical crew members to the accident site. The high rate of emergency medical helicopter operations to avalanche incidents where no victim is injured or buried may be characteristic for densely populated mountainous regions and can be reduced by a restrictive dispatch policy after avalanche accidents without clear information about human involvement.

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