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Flashcards in Enviromental Emerency Deck (59)
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1

Homeostasis

Maintaining constant suitable conditions within body

2

Thermal Gradient

Difference in temperature between environment ( ambient temperature) and body

3

Thermogenesis

Heat generation

4

Thermoregulatory thermogenesis

Controlled by endocrine system

5

Thermolysis

Loss of heat

6

Evaporation

Body heat lost by evaporation of perspiration

7

Convection

Body heat lost to air

8

Conduction

Body heat lost to nearby objects

9

Radiation

Body heat lost to nearby objects without touching them

10

Unclothed person will lose ____ of body heat by radiation at room temperature

60%

11

Thermoregulation

Maintenance or regulation of temperature

12

Hypothalamus

Base of brain; responsible for temperature regulation; functions as thermostat

13

Peripheral thermorecepters

Skin and mucous membranes

14

Central thermorecepters

Deep tissues

15

Hyperthermia vasodilation

Blood carries heat to periphery for dissipation through skin

16

Signs of Thermolysis

Diaphoresis
Increased skin temp
Flushing
AMS
ALOC

17

Predisposing factors of hyperthermia

Age of patient : pedi and geri populations tolerate less variation in temperature
Health of patient : diabetics can become hyperthermia more easily (poor circulation)
Medications
Acclimation

18

Predisposing factors medications for hyperthermia

Diuretics- predispose to dehydration
Beta - blockers : interfere with vasodilation
Psychotropics and antihistamine : interfere with central Thermoregulation.

19

Heat cramps

Muscle cramps; over exertion and dehydration in prescence of atmospheric.
Sweating : loss of water; loss of electrolytes
Intermittent cramping of skeletal muscles may occur

20

Signs and symptoms of heat cramps

Painful ; not actual heat illness
Fingers, arms , legs, abdominal muscles
Mentally alert, weakness, dizzy , and faint
Vitals signs stable
Temp normal, slightly elevated
Skin warm and moist

21

Heat exhaustion

Mild heat illness; acute reaction to heat exposure
Loss of water and sodium with vasodilation
Decreased circulating blood volume, venous pooling, reduced cardiac output.

22

Signs and symptoms of heat exhaustion

Dehydration and electrolyte loss account for signs and symptoms
If not treated , may progress to heatstroke
Increased body temp, skin cool and clammy with heavy perspirations, breathing and shallow, weak pulse.
Diarrhea, muscle cramps, weak, maybe LOC
If CNS symptoms, treat for heatstroke

23

Heatstroke

Hypothalamic temperature regulation lost; uncompensated hyperthermia.
Cell death; damage to brain; liver , kidneys

24

Heatstroke occurs at a temperature of at least ?

105 degrees
40.6 C

25

Exertional heatstroke

Good health; increased core body temp caused by overwhelming heat stress.

26

Heatstroke from exertion can lead to

Metabolic acidosis
HyperK

27

Dehydration in heat disorders

Inhibit vasodilation and Thermolysis
Orthostatic hypotension

28

Hypothermia

Low core body temp below 95 degrees
And 35 C

29

Mild hypothermia

Core temp greater then 90 degrees (32C) with signs and symptoms of hypothermia

30

Signs and symptoms of mild hypothermia

-Tachycardia
-Shivering
-Vasoconstriction
-Tachypnea
-Fatigue; impaired judgement