IH HEAT STRESS Flashcards
Heat STroke SIGNS
- EUPHORIA
- RED FACE
- DISORIENTATION
- HOT, DRY SKIN (USUALLY, BUT NOT ALWASY)
- ERRATIC BEHAVIOR
- COLLAPSE
- SHIVERING
- UNCONSCIOUSNESS
- CONVULSIONS
- BODY TEMPERATURE GREATER THAN 104 DEGREES
HEAT STROKE CAUSE
Excessive exposure
- Subnormal tolerance (geneti or acquired)
- Drug/alcohol abuse
Heat Stroke First Aid
- Immediate, aggressive, effective cooling
- Transport to hospital
- Take body temperature
Heat Strok Prevention
Self-determination of heat stress exposure
- Maintain a healthy lifestyle
- Acclimation
Heat Exhaustion Symptoms
- Fatigue
- Weakness
- Blurred vision
- Dizziness, headache
Heat exhaustion Signs
- High pulse rate
- Profuse sweating
- Low blood pressure
- Insecure gait
- Pale face
- Collapse
- Body temperature: Normal to slightly increased
Heat exhaustion Cause
- Dehydration (caused by sewating, diarrhea, vomiting)
- Distribution of blood to the periphery
- Low level of acclimation
- Low level of fitness
Heat exhaustion First Aid
- Lie down flat on back in cool environment
- Drink water
- Loosen clothing
Heat Exhaustion Prevention
- Drink water or other fluids frequently
- Add salt to food
- Acclimation
Dehydration Symptoms
No early symptoms
- Fatigue/weakness
- Dry Mouth
Dehydration Signs
- Loss of work capacity
* Increased response time
Dehydration Cause
*Excessive fluid loss caused by sweating (vomiting or diarrhea), alcohol consumption
Dehydration First Aid
*Fluid and salt replacement
Dehydration Prevention
- Drink water or other fluids frequently
* Add salt to food
Heat Syncope Symptoms
- Blurred vision (gray-out
- Fainting (brief black-out)
- Normal Temperature
Heat Syncope Signs
*Brief fainting or near-fainting behavior
Heat syncope Cause
*Pooling of blood in the legs and skin from prolonged static posture and heat exposure
Heat Syncope First Aid
- Lie on back in cool environment
* Drink water
Heat syncope Prevention
- Flex leg muscles several times before moving
* Stand or sit up slowly
Heat cramps Symptoms
*Painful muscle cramps, especially in abdominal or fatigued muscles
Heat cramps Signs
*Incapacitating pain in muscles
Heat cramps Cause
*Electrolyte imbalance caused by prolonged sweating without adequate fluid and salt intake
Heat cramps First Aid
- Rest in cool environment
- Drink salted water (0.5% salt solution)
- Massage muscles
Heat Cramps Prevention
*If hard physical work is part of the job, workers should add extra salt to their food
Heat rash (prickly heat Symptoms
- Itching skin
* Reduced seating
Heat rash (Prickly heat) Signs
*Skin eruptions
Heat rash (prickly heat) Cause
- Prolonged, uninterrupted sweating
* Inadequate hygiene practices
Heat rash (prickly heat) First Aid
- Keep skin clean and dry
* Reduce heat exposure
Heat Rash (prickly heat) Prevention
*Keep skin clean and periodically allow the skin to dry
What are the three factors that influence Thermal Stress
- Climatic conditions
- Work demands
- clothing
What is metabolic RAte
rate of internal heat generation, which must be dissipated from the body to maintain THERMAL EQUILIBRIUM
WBGT MEASURES WHAT 3 THINGS
RADIANT HEAT
AIR TEMP
EVAPORATIVE COOLING
TRUE/FALSE
Telling employees to take a break whenever they need one is an effective control
FALSE
What % of people are heat intolerant
3%
The heat index on the news measures what two things?
Relative humidity
dry bulb temperation
Why is Heat Index more valuable to the general population than WBGT?
Because everyone understands it
Since going by heat index chart will cause you to send people home 1/2 the year in Corpus Christi, what should you do?
Use control mechanisms
What does heat Index chart compare? Measure?
Compares relative temperature to environmental temperature to get “apparent temperature”. Color indicate Heat Stress Risk with Physical Activity and/or prolonged exposure
The Heat Index Chart - gives you information about?
Heat Stress Risk with Physical Activity and/or prolonged Exposure
If apparent temperature is 90-105 F - and is the blue part of the chart what is possible?
Heat cramps or heat exhaustion possible
If Heat Index Chart is yellow - 105 - 130 F what is likely and what is possible
Heat cramps or heat exhaustion likely. Heat stroke possible
If heat index chart is in the red zone - 103 F and up what is highly likely?
Heatstroke is highly likely.
What assumptions are made of WBGT and NIOSH ACGIH TLV
Loose cotton clothing
take breaks in same thermal environment you work in
No PPE
True/False
Long term exposure to heat can cause liver, kidney failure
True
True/False
Short term overexposure to heat can cause irritability
True
How long can it take to become acclimatized to heat?
Two weeks
What is the biggest contributor to heat gain by a worker
The metabolic cost of doing work
heat stroke symptoms
- Chills
- Restlessness
- Irritability
