Environmental Conditions Heat Flashcards
What is the most important thing when providing care
The proper treatment
What do previous heat strokes result in?
Permant brain damage and the thermoregulatory system ( hypothalamus)
What is thermoregulation
The ability for the body to maintain a fairly steady core body temp under a variety of condition
What is the thermoregulation controlled by
Hypothalamus
Where does blood flow increase to
He skin and extremities
What temp is the body constantly trying to maintain
98.6 degrees
What are the two forces that act on the body to increase heat
External forces and internal forces
What is the external force
Environmental conditions, exercise intensity, clothing, equipment
What is the internal force
Metabolic heat production, individual factors
What happens as body heat increase
Core body temp increase
What are the four heat loss mechanism
Radiation
Conduction
Convection
Evaporation
What is radiation
During exercise the body attempts to dissipate heat by dilating superficial arterial and venous vessels
What is conduction
Transfer of heat by direct contact of a warm object with a cool object
What is convection
Body transfers heat to surrounding area example cool breeze
What is evaporation
Molecus in water absorb heat from environment and escape as gas
What does evaporation of sweat cause
Heat loss
What is the total amount of sweat vaporized dependent on
Surface of skin exposed to environment
Temp and humidity of ambient air
Air currents around the body
What is the most effective mode of cooling
Evaporation
Increases core body temp riggers what?
Sweating mechanism
What are the ways to measure core body temp
Rectal Ingestible thermistor Oral Aural Axial part Skin strip
Which four way to measue core body temp where invalid
Oral
Aural
Ancillary
Skin strip
What are the types of heat illnesses
Heat rash Heat syncope Heat cramps Heat exhaustion/ dehydration Heat stroke
What is heat rash also called
Prickly heat
What the MOI for heat rash
Wet skin from sweat or wet clothing running on skin
