January 17, 2013

Hypothermia. Are You Prepared for the Cold Winter?

It’s not just in the winter months that workers are exposed to cold stress, but it is a lot more likely… especially in the more northerly and southerly regions of the world.  Workers who are exposed to extreme cold or work in cold environments may be at risk of cold stress.

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The CDC explains that extreme cold weather is a dangerous situation that can bring on health emergencies in susceptible people, such as those without shelter, outdoor workers, and those who work in an area that is poorly insulated or without heat. What constitutes cold stress and its effects can vary across different areas of the country. In regions relatively unaccustomed to winter weather, near freezing temperatures are considered factors for “cold stress.” Whenever temperatures drop decidedly below normal and as wind speed increases, heat can more rapidly leave your body.

These weather-related conditions may lead to serious health problems.

Types of Cold Stress:

Hypothermia - When exposed to cold temperatures, your body begins to lose heat faster than it can be produced. Prolonged exposure to cold will eventually use up your body’s stored energy. The result is hypothermia, or abnormally low body temperature. A body temperature that is too low affects the brain, making the victim unable to think clearly or move well. This makes hypothermia particularly dangerous because a person may not know it is happening and will not be able to do anything about it.

Cold Water Immersion - Cold water immersion creates a specific condition known as immersion hypothermia. It develops much more quickly than standard hypothermia because water conducts heat away from the body 25 times faster than air. Typically people in temperate climates don’t consider themselves at risk from hypothermia in the water, but hypothermia can occur in any water temperature below 70°F.

Survival times can be lengthened by wearing proper clothing (wool and synthetics and not cotton), using a personal flotation device (PFD, life vest, immersion suit, dry suit), and having a means of both signaling rescuers (strobe lights, personal locator beacon, whistles, flares, waterproof radio) and having a means of being retrieved from the water.

Frostbite - Frostbite is an injury to the body that is caused by freezing. Frostbite causes a loss of feeling and color in the affected areas. It most often affects the nose, ears, cheeks, chin, fingers, or toes. Frostbite can permanently damage body tissues, and severe cases can lead to amputation. In extremely cold temperatures, the risk of frostbite is increased in workers with reduced blood circulation and among workers who are not dressed properly.

Stay safe this winter. Have you reviewed the Environnmental Emergencies section in MEDIC First Aid's BasicPlus program or ASHI's Basic First Aid program? Both programs review information about hypothermia. Download the fliers here.


ASHI BFA Spec Sheet Download MEDIC BasicPlus Spec Sheet Download