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Published byRoss Malone Modified over 8 years ago
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Environmental Considerations
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Hyperthermia Hyperthermia- elevated body temperature Heat can be gained or lost through Metabolic heat production- how hard you are working (sprinting vs jogging Conductive heat exchange- physical contact with objects (standing on turf) Convective Heat- air or water moves around body Radiant heat- heat from sun Evaporative heat loss- sweating and evaporation from the body
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Prevention of hyperthermia Appropriate hydration Unrestricted fluid and electrolyte replacement Gradual acclimatization Identification of susceptible individuals Appropriate uniforms Weight records Monitoring of the heat index
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Dehydration Sign and symptoms- Thirst Dry mouth Headache Dizziness Irritability Lethargy Excessive fatigue cramps
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Monitoring heat index Heat and humidity is worst than just heat. Humidity make is different for sweat to evaporate. If your sweat does not evaporate you body is not cooling.
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Heat illnesses p 159 Heat Rash- benign condition sign and symptoms- red raised rash
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Heat Illnesses Heat Syncope- rapid physical fatigue during overexposure to heat Sign and symptoms- dizziness, fainting and nausea. Treatment- lying down in cool environment, fluids
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Heat Illnesses Heat Cramps- Causes- hard work in heat, sweating heavily, imbalance between water and electrolytes Sign and symptoms- muscle twitching cramps, spasms in arms, legs and abdomen Treatment- fluids, mild stretching, ice massage
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Heat Illnesses cont. Heat Exhaustion- Causes- prolonged sweating leading to dehydration and inability to sustain adequate cardiac output Sign and symptoms- Excessive thirst, dry tongue and mouth, weight loss, fatigue, weakness, reduced sweating, dark urine Treatment- Fluids, sponge with cool water.
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Heat Illnesses Heat Stroke- Thermoregulatory failure of sudden onset, Life threatening Causes- CNS abnormality Sign and symptoms- headache, vertigo, fatigue, flushed skin, less sweating, rapidly increasing pulse, rapid rise in temperature 104. Athlete feels as if he is burning up, can lead to permanent brain damage Treatment- cool body, water submersion, 911.
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Heat Illnesses Exertional hyponatremia- Causes- Fluid/electrolyte disorder resulting in low concentration of sodium in blood. Sign and symptoms- Progressively worsening headache, nausea and vomiting, swelling in hands and feet, lethargy, compromised central nervous system Treatment- do not try to rehydrate, transport, 911. sodium levels must be increased
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Hypothermia Causes- overexposed to cold and humidity Sign and symptoms- impairment of neuromuscular response and exhaustion, decrease in core body temperature, shivering ceases below 85-90. Death at 77-85 Treatment- move to warm environment, 911.
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Altitude Natives- larger chest capacity, more alveoli, more capillaries, higher red blood cell Resident adaption includes conservation of glucose, increased number of mitochondria, increased formation of hemoglobin Visitors- increased breathing, increased heart action, increased hemoglobin,
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Altitude illnesses Acute mountain sickness- 1out of 3 people. Sign and symptoms- headache, nausea, vomiting, dyspnea Causes- tissue disruption in the brain affects sodium and potassium balance causing fluid retention Staying hydrated can help prevent
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Altitude illness High altitude pulmonary edema- Small amount of fluid within the alveolar walls Symptoms- dysnea, cough, headache, weakness and unconsciousness Treatment- move to lower altitude and give O2.
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Altitude illnesses High Altitude cerebral edema- life threatening condition that can lead to coma or death Caused by increased cerebral blood flow Symptoms- severe headache, bizarre behavior and neurological abnormalities Treatment- get to lower altitude
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Altitude illnesses Sickle-Cell Trait Reaction- sickle cell trait is a abnormality in the structure of the red blood cell and their hemoglobin content When the abnormal hemoglobin molecules become deoxygenated as a result of exercise at high altitude the cells tend to clump together This condition can cause an enlarged spleen http://sports.yahoo.com/nfl/blog/shutdown_c orner/post/sickle-cell-trait-keeps-ryan-clark- out-of-denver-playoff-game?urn=nfl,wp15160
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