 Show
ReviewThermoregulatory disorders and illness related to heat and cold stressUnder a Creative Commons license Open access Highlights• Hypothermia (core temperature < 35.0 °C) and hyperthermia (core temperature > 40.5 °C) are medical emergencies. •Severely hypothermic patients are at risk of cardiac arrhythmias, including atrial and ventricular fibrillation. •The clinical feature that best differentiates heat stroke from heat exhaustion is a change in mental status. Anhidrosis may be present in classical, but usually not in exertional, heat stroke. Sweating does not exclude heat stroke. •Ice water immersion for heat stroke should begin as early as possible to lower core temperature within 30 minutes AbstractThermoregulation is a vital function of the autonomic nervous system in response to cold and heat stress. Thermoregulatory physiology sustains health by keeping body core temperature within a degree or two of 37 °C, which enables normal cellular function. Heat production and dissipation are dependent on a coordinated set of autonomic responses. The clinical detection of thermoregulatory impairment provides important diagnostic and localizing information in the evaluation of disorders that impair thermoregulatory pathways, including autonomic neuropathies and ganglionopathies. Failure of neural thermoregulatory mechanisms or exposure to extreme or sustained temperatures that overwhelm the body's thermoregulatory capacity can also result in potentially life-threatening departures from normothermia. Hypothermia, defined as a core temperature of < 35.0 °C, may present with shivering, respiratory depression, cardiac dysrhythmias, impaired mental function, mydriasis, hypotension, and muscle dysfunction, which can progress to cardiac arrest or coma. Management includes warming measures, hydration, and cardiovascular support. Deaths from hypothermia are twice as frequent as deaths from hyperthermia. Hyperthermia, defined as a core temperature of > 40.5 °C, may present with sweating, flushing, tachycardia, fatigue, lightheadedness, headache, and paresthesia, progressing to weakness, muscle cramps, oliguria, nausea, agitation, hypotension, syncope, confusion, delirium, seizures, and coma. Mental status changes and core temperature distinguish potentially fatal heat stroke from heat exhaustion. Management requires the immediate reduction of core temperature. Ice water immersion has been shown to be superior to alternative cooling measures. Avoidance of thermal risk and early recognition of cold or heat stress are the cornerstones of preventive therapy. KeywordsThermoregulation Heat stroke Heat exhaustion Hypothermia Rewarming Hypohidrosis Small fiber neuropathy Cited by (0)© 2016 The Author. Published by Elsevier B.V. OverviewWhat is hyperthermia?Hyperthermia is an abnormally high body temperature — or overheating. It's the opposite of hypothermia, when your body is too cold. Hyperthermia occurs when your body absorbs or generates more heat than it can release. A human’s normal body temperature is about 98.6 degrees Fahrenheit. Any body temperature above 99 or 100 degrees Fahrenheit is too warm. Hyperthermia is usually the result of overexertion in hot, humid conditions. Most forms of hyperthermia are preventable. Is hyperthermia the same as a fever?Hyperthermia isn’t the same as a fever. When you have hyperthermia, your body temperature rises above a certain “set-point” that’s controlled by your hypothalamus (a part of your brain that controls many body functions). But when you have a fever, your hypothalamus actually increases your body’s set-point temperature. This intentional rise in body temperature is your body’s attempt to fight off an illness or infection. Are there different types of hyperthermia?Hyperthermia describes a group of heat illnesses that include (from least to most severe):
What is malignant hyperthermia?Malignant hyperthermia is a genetic condition that can make you susceptible to hyperthermia if you receive a specific combination of sedatives and anesthesia for medical procedures. If you have this disease, your body temperature can spike dangerously during or after surgery. People with malignant hyperthermia might have a reaction the first time they’re exposed to certain medications, but it’s more common after several exposures. Who gets hyperthermia?Anyone can get a heat illness, but you’re at especially high risk if you:
How common is hyperthermia?Between 2004 and 2018, an average of 702 heat-related deaths occurred in the U.S. each year. Athletes, outdoor laborers, military trainees, infants and the elderly are the most likely to develop hyperthermia. Symptoms and CausesHeat exhaustion is a type of hyperthermia characterized by blurred vision, dizziness, low blood pressure and other symptoms.What causes hyperthermia?Hyperthermia occurs when your body takes in more heat than it releases. Sweat is your body’s natural cooling mechanism, but sometimes sweating isn’t sufficient to keep your body at a normal temperature. When this happens, your body temperature can rise. Physical exertion in very hot, humid weather is the most common cause of hyperthermia. What are the symptoms of hyperthermia?Heat cramps typically cause sudden muscle spasms in your feet, calves, thighs, hands or arms. The cramps might feel painful or tense. Your muscles might be sore after the cramp passes. Symptoms of heat exhaustion include:
Symptoms of heatstroke can often be similar to those of heat exhaustion, but may also include:
People with heatstroke can develop shock, slip into a coma, experience organ failure or die. If you experience symptoms of heat stroke, seek immediate medical attention. Diagnosis and TestsHow is hyperthermia diagnosed?Healthcare providers diagnose hyperthermia by reviewing your symptoms, performing a physical exam and taking your temperature. They may also order blood or urine tests. Management and TreatmentHow are heat cramps, heat exhaustion, heat rash and heat stress treated?If you experience mild-to-moderate heat illness symptoms, you should:
You can usually treat these conditions at home. In some cases, your healthcare provider may recommend intravenous (IV) fluid replacement through a catheter in your arm. How is heatstroke treated?Heatstroke is a medical emergency that requires treatment in a hospital. If you’re waiting for an ambulance to arrive, try to cool the person as much as possible:
At the hospital, you may receive cooled IV fluids. A healthcare provider may also recommend cold-water lavage. This is a procedure that washes out body cavities with cold water. PreventionHow can I prevent hyperthermia?In most cases, it’s possible to prevent hyperthermia. You should:
If you must do activities in the heat due to your job or a sport, let your body gradually acclimate to the heat. Start doing light work or exercise about two weeks before you need to do the really hard work. Then, gradually build your body’s ability to withstand high temperatures. If possible, plan to do the work during the early morning hours when it might be cooler. Outlook / PrognosisWhat’s the prognosis (outlook) for people with hyperthermia?Most people recover fully from heat illnesses once they rest in a cool environment and replace lost electrolytes. But heatstroke can lead to permanent organ damage or even death. Living WithWhen should I contact my doctor?Contact your doctor if you or someone else:
A note from Cleveland Clinic Hyperthermia, or heat illness, is an abnormally high body temperature. It’s usually the result of doing too much physical activity in hot, humid weather. Infants, the elderly, athletes and people with strenuous outdoor occupations are at the highest risk for hyperthermia. Heat illnesses can range from mild (heat cramps or heat exhaustion) to severe (heatstroke). People with a heat illness should cool their body temperature right away. Call 911 immediately at the first signs of heatstroke. What do you call to the excessive low body temperature characterized by uncontrolled severing?Hypothermia is an abnormally low body temperature of below 95°F (35°C) . This happens when a person experiences cold temperatures for a prolonged period.
What do you call to the exercise low body temperature characterized by uncontrolled shivering?Hypothermia is defined as a body core temperature below 35.0 °C (95.0 °F) in humans. Symptoms depend on the temperature. In mild hypothermia, there is shivering and mental confusion.
What does mean hypothermia?What is hypothermia? Hypothermia is caused by prolonged exposures to very cold temperatures. When exposed to cold temperatures, your body begins to lose heat faster than it's produced. Lengthy exposures will eventually use up your body's stored energy, which leads to lower body temperature.
What condition is characterized by the excessive rise in body temperature Brainly?Hyperthermia is an abnormally high body temperature — or overheating. It's the opposite of hypothermia, when your body is too cold.
|
What do you call to the excessive low body temperature characterized by uncontrolled shivering?
zusammenhängende Posts
Urheberrechte © © 2024 de.ketajaman Inc.
