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Hyperthermiaalso known as heat stroke, becomes commonplace during periods of sustained high temperature and humidity.
Older adults, very young children, and those who are sick or overweight are at a higher risk for heat-related illness. The chronically ill and elderly are often taking prescription medications e. When combined with peripheral vasodilation and venous stasisthe excess fluid accumulates in the dependent areas of the extremities.
The heat edema usually resolves within several days after the patient becomes acclimated to the warmer environment. No treatment is required, although wearing support stockings and elevating the affected legs will help minimize the edema.
Heat rashalso known as prickly heat, is a maculopapular rash accompanied by acute inflammation and blocked sweat ducts. The sweat ducts may become dilated and may eventually rupture, producing small pruritic vesicles on an erythematous base.
Heat rash affects areas of the body covered by tight clothing. If this continues for a duration of time it can lead to the development of chronic dermatitis or a secondary bacterial infection. Prevention is the best therapy.
It is also advised to wear loose-fitting clothing in the heat. However, once heat rash has developed, the initial treatment involves the application of chlorhexidine lotion to remove any desquamated skin. The associated itching may be treated with topical or systemic antihistamines.
If infection occurs a regimen of antibiotics is required. The North American heat wave. Record temperatures were based on year records Heat cramps are painful, often severe, involuntary spasms of the large muscle groups used in strenuous exercise.
Heat cramps tend to occur after intense exertion. They usually develop in people performing heavy exercise while sweating profusely and replenishing fluid loss with non-electrolyte containing water.
This is believed to lead to hyponatremia that induces cramping in stressed muscles. Rehydration with salt-containing fluids provides rapid relief. Patients with mild cramps can be given oral. The many sport drinks on the market are a good source of electrolytes and are readily accessible.
Heat syncope is related to heat exposure that produces orthostatic hypotension. This hypotension can precipitate a near-syncopal episode.
Heat syncope is believed to result from intense sweating, which leads to dehydrationfollowed by peripheral vasodilation and reduced venous blood return in the face of decreased vasomotor control. Management of heat syncope consists of cooling and rehydration of the patient using oral rehydration therapy sport drinks or isotonic IV fluids.
People who experience heat syncope should avoid standing in the heat for long periods of time. They should move to a cooler environment and lie down if they recognize the initial symptoms. Wearing support stockings and engaging in deep knee-bending movements can help promote venous blood return.
Heat exhaustion is considered by experts to be the forerunner of heat stroke hyperthermia. It may even resemble heat stroke, with the difference being that the neurologic function remains intact.
Heat exhaustion is marked by excessive dehydration and electrolyte depletion. Symptoms may include diarrheaheadachenausea and vomitingdizzinesstachycardiamalaiseand myalgia.California Gov.
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Corium (also called fuel containing material (FCM) or lava-like fuel containing material (LFCM)) is the lava-like mixture of fissile material created in a nuclear reactor's core during a nuclear meltdown..
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