Heat stroke
July 16, 2022
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Dr John Campbell Episodes Around July 16, 2022
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19:04Now PlayingHeat stroke
YouTube Description
as posted by the channelCool ASAP using water and fans. Splash all over with water or immerse in water.
Heatstroke (acute hyperthermia)
Prolonged exposure to hot (often humid) environments
Physical exercise in hot environments
104 °F 40 °C
105.1 °F 40.6 °C
A medical emergency
Disorientation
Can quickly damage brain, heart, kidneys, muscles
Damage worsens if treatment delayed
Symptoms
High body temperature
Altered mental state or behaviour
Skin, often hot, red and dry at first
Nausea and vomiting
Tachycardia
Tachypnoea
Headache
A medical emergency
Get help and get them cooled
Factors
Excess heat production
Exercise
Excessive environmental heat
Sun
Humidity
Impaired heat loss
Clothes
Dehydration
Alcohol
Risk factors
Young children
Over 65s
Lack of time to acclimatise
Lack of AC / fans
Meds, beta blockers, diuretics, antidepressants, antipsychotics, amphetamines, cocaine
Chronic illnesses, heart or lung disease, obese, unfit
Prevent
Good hydration
Loose fitting, lightweight clothes
Prevent sunburn
Delay workouts
Rearrange work schedules
Parked cars
Take time to acclimatize
Science
Hypothalamus set point is normal,
but is overwhelmed
Failure of thermal homeostatic mechanisms
Unlike fever where set point is deliberately increased by cytokines
Enzymic function
Pro inflammatory cytokine release
Inflammation
Damage to vascular endothelium
Intravascular coagulation of blood
Thermal coagulation
Disruption of intestinal barriers
Heat exhaustion
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