Heat Exhaustion

Heat exhaustion is a non-life-threatening, clinical syndrome of weakness, malaise, nausea, unconsciousness, and other non-specific symptoms that can be caused by heat exposure. Thermoregulation and CNS function are not affected, but patients are dehydrated in general and can have a slightly elevated body temperature (<40 ° C). Treatment involves rest in a cool environment and replacement of fluid and electrolytes.

On rare occasions, that severe heat exhaustion after hard work by rhabdomyolysis, myoglobinuria and acute renal failure is complicated. It differs from heat stroke by the absence of brain dysfunction (eg. As confusion, ataxia).

Heat exhaustion is a non-life-threatening, clinical syndrome of weakness, malaise, nausea, unconsciousness, and other non-specific symptoms that can be caused by heat exposure. Thermoregulation and CNS function are not affected, but patients are dehydrated in general and can have a slightly elevated body temperature (<40 ° C). Treatment involves rest in a cool environment and replacement of fluid and electrolytes. On rare occasions, that severe heat exhaustion after hard work by rhabdomyolysis, myoglobinuria and acute renal failure is complicated. It differs from heat stroke by the absence of brain dysfunction (eg. As confusion, ataxia). Symptoms and signs The symptoms are often vague and the patient may not recognize that heat is the cause. Symptoms include nausea, weakness, dizziness, headache, nausea and sometimes vomiting. Unconsciousness Long standing in the heat (heat syncope) can occur. In the study, the patients appear tired are usually sweaty and tachycardic, and may orthostatic hypotension The mental status is intact, unlike the heat stroke. The temperature is usually normal and exceed if they should be increased, not usually 40 ° C. Diagnosis Clinical Evaluation The diagnosis is clinical and requires the exclusion of other possible causes (eg. As hypoglycemia, acute coronary syndrome, various infections). Laboratory tests are necessary to eliminate such diseases. The electrolyte levels should be measured to rule out severe hyponatremia in patients who had an excessive water intake, v. a. if they develop symptoms of brain dysfunction treatment oral or intravenous fluid and electrolyte replacement therapy Treatment involves cessation of all efforts and accommodation of patients in a cool environment, lying flat and the attempt of oral rehydration with a solution of 0.1% NaCl. Patients should be about 1 l / h drink. If vomiting or nausea prevent oral rehydration, is an i.v. Fluid and electrolyte replacement therapy required, typically using 0.9% saline. Also, patients should, if the symptoms are not resolved after 30 to 60 minutes to an emergency room where rehydration usually i.v. he follows. Amount and extent of intravenous rehydration be determined on age, the underlying disease and the clinical response. Often the replacement of 1-2 l at 500 ml / h is appropriate. Elderly patients and patients with cardiac disorders need lower doses. External cooling measures (heat stroke: treatment) are usually not required. However, if patients with heat exhaustion a core temperature of ? 40 ° C, measures can be taken to reduce them. Important points that symptoms usually are nonspecific If heat exhaustion, the temperature is typically <40 ° C and CNS function is not impaired. Diagnose heat exhaustion clinically, investigations as indicated to rule out other clinically suspected disorders. Let her patients in a cool environment to rest and try one oral rehydration if these measures are not successful, the patient should be taken to an emergency room.

Health Life Media Team

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