In case of high heat, our body reacts by activating its cooling system to maintain body temperature at 37°C even if it is warmer outside. How ? Over therevasodilatationand by thesweating. The vasodilatation of the vessels that one feels well when it is hot (heavy legs, swollen hands and feet, hot surface of the skin) makes it possible to evacuate the heat towards the surface of the body. There sweat allows, in turn, cool the surface of the skin. Infants in whom the mechanism is not yet finalized and elderly people in whom the mechanism no longer works as well are most at risk of heat stroke. This state of dehydration is a medical emergency which can be life-threatening. What to do in case of heat stroke?
Heat stroke is overheating of the bodywith a temperature above 40 degrees. The body can no longer cope with the increase in internal temperature linked to muscular activity and/or an overheated atmosphere (heat wave). We thus distinguish the classic heatstroke in people exposed for a long time to a hot and humid ambient temperature (for example, staying for hours in a car or in a RER in the heat) of exercise heat stroke which occurs during intense and sustained physical activity (classic heat stroke). Classical heatstroke occurs in epidemic form during heat waves, and predominates in the elderly, frail, suffering from chronic pathology: cardiovascular, pulmonary or mental.
Exercise heat stroke occurs after a intense and sustained physical activity in a hot atmosphere, sporadically and affects young, healthy subjects such as athletes high level and military personnel. Symptoms are similar to classic heatstroke except that the subject’s skin is moist due to heavy perspiration rather than dry.
The diagnosis of classic heat stroke is based on hyperthermia and consciousness disorders after exposure to a hot and humid atmosphere. Among the symptoms of heatstroke:
In mild and quickly treated forms, heat stroke usually lasts less than 12 hours.
You must seek medical assistance as soon as possible: call 15. Waiting :
No adjuvant pharmacological treatment that can accelerate cooling has shown its effectiveness.
Heatstroke is a medical emergency because it can be life-threatening. It can lead to neurological disorders (delirium, convulsions or coma) and then so-called failures "multivisceral" and evolve towards death. Multiorgan failures are:
Among the most severe complications observed as a result of heat stroke are:
► Drink water regularlywithout waiting to be thirsty (at least 1.5 L per day). First people affected, infants and the elderly. The latter who sometimes do not feel the sensation of thirst must force themselves to drink.
► Avoid physical exertion and sportwhich increase your internal body temperature.
► Wear light and loose clothingbecause they promote air circulation, rather light in color so as not to retain heat.
► Refresh yourself several times a day: don’t hesitate to take showers, get your head wet, use misters or damp cloths.
► Fans?They provide a pleasant feeling of freshness through air circulation, but when the air is hot, it stays hot and in fact does not cool you down. So it’s not enough to cool you down. It is best to get wet regularly.
► What to drink?Avoid alcohol, sugary drinks, and high caffeine content (coffee, tea). Prefer still and sparkling water (enriched with salt) and fresh fruit juices.
► What to eat?Continue to eat normally, preferably favoring fruits and vegetables: salads of raw vegetables, fresh soups, but also dairy products (liquid yoghurts, milkshakes, etc.).
► Cover your head. Your choice of hats, caps, or scarves will save you from sunstroke.
►Even if the heat is tiring,don’t take a nap in the sun!
► Stay in well ventilated and cool rooms. Close the shutters and open the windows to let in the air. If your apartment is really hot, arrange to stay in cool or air-conditioned places for at least two or three hours during the day (department stores, cinemas, public places).
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