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Study sets matching "heat stress"

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Study sets matching "heat stress"

Heat Stress
Animal first response to
Rapid, shallow breathing is
Uses upper respiratory ventilation
As the environmental temperatures incr…
Animal first response to heat stress by increasing the freque…
Rapid, shallow breathing is called thermal polypnea
Uses upper respiratory ventilation, minimal alveolar ventilat…
As the environmental temperatures increase and the animal get…
Animal first response to
Animal first response to heat stress by increasing the freque…
Rapid, shallow breathing is
Rapid, shallow breathing is called thermal polypnea
9 terms
Heat Stress
WGBT
WBGT formula
Dry Bulb (DB) Temp Readings Required?
Dry Bulb (DB) Temp Recording
Wet Bulb Globe Temp
= (0.1 x DB) + (0.7 x WB) + (0.2 x GT)
1) every 4hrs for manned spaces if DB<85 deg... 2) every 1hr for…
1) paper log... 2) temp > 100 deg work <4hrs... 3) temp >90 deg wor…
WGBT
Wet Bulb Globe Temp
WBGT formula
= (0.1 x DB) + (0.7 x WB) + (0.2 x GT)
19 terms
Heat Stress
Mesophytes
Factors
Heat stress
Radiant heat load and evaporative cool…
-terrestrial plants that are adapted to temperate envi ... -most…
-evaporative cooling (poor air circulation decreases cooling)…
high leaf temps + minimal evaporative cooling
-heat load when exposed to full sunlight very high -> however…
Mesophytes
-terrestrial plants that are adapted to temperate envi ... -most…
Factors
-evaporative cooling (poor air circulation decreases cooling)…
Heat Stress
Metabolic Heat Production
Conductive Heat Exchange
Convective Heat Exchange
Radiant Heat Exchange
Normal metabolic function results in production of heat (will…
Physical contact with objects resulting in heat loss or gain
Body heat can be lost or gained depending on circulation of m…
Comes from sunshine and will cause increase in temperature
Metabolic Heat Production
Normal metabolic function results in production of heat (will…
Conductive Heat Exchange
Physical contact with objects resulting in heat loss or gain
12 terms
heat stress
heat stress
heat stress personal causes
flight deck , scullery, engienering sp…
hs monitoring
lack of acclimatization,water,
nutrition, wrong clothes
heat humidity problems
...
heat stress
lack of acclimatization,water,
heat stress personal causes
nutrition, wrong clothes
7 terms
Heat Stress
Core body temperature
Hyperthermia
Acclimation to heat how long does it t…
Environmental and task factors in hot…
37C 98.6F
Too hot
3-14 days
Air Temperature, Humididity, Wind Speed, Radiant heat, clothi…
Core body temperature
37C 98.6F
Hyperthermia
Too hot
12 terms
Heat stress
hyperthermia
hypothalamus
radiation
conduction
increase in body temperature by 5degreesC or more
central coordinating center for temperature regulation, prote…
when objects emit electromagnetic heat waves, body temperatur…
transfers heat directly through a solid, liquid, or gas from…
hyperthermia
increase in body temperature by 5degreesC or more
hypothalamus
central coordinating center for temperature regulation, prote…
9 terms
Heat Stress
ΔHE= ?
Sensible Heat loss?
Not sensible heat loss?
ΔH= ?
ΔHE = ΔHcond + ΔHconv + ΔHrad + ΔHevap
conduction, convection, radiation
evaporation
ΔH = (Surface Area) (constant)(TAN - TENV)
ΔHE= ?
ΔHE = ΔHcond + ΔHconv + ΔHrad + ΔHevap
Sensible Heat loss?
conduction, convection, radiation
13 terms
Heat stress
PHEL
How shall a DB thermometer be hung?
When should DB measurements be taken?
What temps trigger heat stress surveys?
Psyological hear exposure limmit
Out of the ventilation air stream, at least two feet from any…
Every 4 hours in manned spaces when temps are less than or eq…
DB 100 work watch 4 hours or less. ... DB 90 work watch greater…
PHEL
Psyological hear exposure limmit
How shall a DB thermometer be hung?
Out of the ventilation air stream, at least two feet from any…
34 terms
Heat stress
What is heat stress?
What age of workers should be more car…
what conditions of body needs acclimat…
Acclimatization of experienced worker
when hot puts stress on body's cooling system
40 years
-when not used to working in the heat... -returned from long break
-limit time in hot env. to 50% first day... -80% on second day... -…
What is heat stress?
when hot puts stress on body's cooling system
What age of workers should be more car…
40 years
22 terms
Heat Stress
4 Major personal factors governing per…
Secondary factors governing performanc…
Acute physiological effects of exercis…
Adaptations to exercise in the heat
1. Aerobic fitness - mainly because increased CV and heat los…
- Illness... - Medications... - Age... - Sex... - Body size ... - Fatigue
- Warmer periphery (skin and muscle) ... - More blood to skin, c…
- Increased BV (helps keep blood flow up and HR down) ... - Incr…
4 Major personal factors governing per…
1. Aerobic fitness - mainly because increased CV and heat los…
Secondary factors governing performanc…
- Illness... - Medications... - Age... - Sex... - Body size ... - Fatigue
22 terms
Heat stress
Who can authorize the extension of saf…
WBGT replacement
The impact of fuel combustion gases, s…
What are the curve selections?
Only the Commanding Officer can and only in a emergency
Questemp *48N portable monitor
Exposure limit must be reduced. ... Calculate the stay time, and…
1) Routine operation. ... 2) Non-routine operation. ... 3) Engineer…
Who can authorize the extension of saf…
Only the Commanding Officer can and only in a emergency
WBGT replacement
Questemp *48N portable monitor
44 terms
Heat Stress
what does the hypothalamus do?
what are the body's 4 methods of heat…
What are the 6 sources of the body's h…
Heat loss by radiation
initiates the response to dissipate heat
radiation, conduction, convection and evaporation
BMR, muscular activity, hormones, TEF, postural changes, and…
exchange of heat energy from hot object to cooler object thro…
what does the hypothalamus do?
initiates the response to dissipate heat
what are the body's 4 methods of heat…
radiation, conduction, convection and evaporation
28 terms
8 Acute Heat Stress
Human vs Dog heat dissipation
Influences from thermal and non-therma…
What is the most important regulated v…
Where is our blood volume during therm…
Blood pressure
Blood is in normal places during thermoneutral conditions... Blo…
Human vs Dog heat dissipation
Influences from thermal and non-therma…
12 terms
heat stress, cold stress
temperature regulation
if cold
if host
heat stress
hypothalamus, behavioral and autonomic
heat production, heat conservation (vasoconstriction, phioere…
heat loss, conduction, convection, radiation from body surfac…
72 degrees for adult cows, increase rr, decrease DMI, milk pr…
temperature regulation
hypothalamus, behavioral and autonomic
if cold
heat production, heat conservation (vasoconstriction, phioere…
19 terms
Heat Stress (Part 1)
Heat transfer methods
How does the body cool down?
Vasodilation will increase the...
To cool down, evaporation (E) of sweat…
Conduction, convection, metabolic heat, radiation
Vasodilation and evaporation
Blood flow to the skin
Heat loss
Heat transfer methods
Conduction, convection, metabolic heat, radiation
How does the body cool down?
Vasodilation and evaporation
5 terms
Exam 1 Heat Stress
Explain the heat balance equation and…
Be able to provide a short list of the…
Identify individual differences that c…
Explain the difference between a dry b…
R:radiative heat gain or loss... C: convective heat gain or loss…
heat stroke: core temp > 40C... heat syncope: fainting while ere…
physical fitness, age, gender, body fat, drugs and alcohol, n…
dry: measurement of air temperature using thermometer... wet: me…
Explain the heat balance equation and…
R:radiative heat gain or loss... C: convective heat gain or loss…
Be able to provide a short list of the…
heat stroke: core temp > 40C... heat syncope: fainting while ere…
14 terms
Lecture 6 Heat Stress
what are the 4 thermodynamic processes
metabolism
Evaporation
radiation
-metabolism... -evaporation... -radiation... -convection
heat gain: physical activity
heat loss: relative humidity and air velocity across the skin
heat gain or loss: from objects
what are the 4 thermodynamic processes
-metabolism... -evaporation... -radiation... -convection
metabolism
heat gain: physical activity
Heat Stress and Starvation
Homeotheermic
Hypothalamus
Heat lost or gained from environment... H…
Heat production... Heat conservation
Cows are __ meaning they can maintain a regular body temperat…
What part of the brain intercepts hot/cold info?
What two things are balanced to maintain internal core body t…
What tow things will be increased if it gets too cold?
Homeotheermic
Cows are __ meaning they can maintain a regular body temperat…
Hypothalamus
What part of the brain intercepts hot/cold info?
52 terms
CIH Heat Stress/Noise
Presbycusis
What does a sound level meter measure?
Sound intensity
Sound power level
Hearing loss related to aging
Sound pressure
Having both magnitude and direction, doesn't correspond w/ lo…
Analogous to electrical power rating of light bulb, independe…
Presbycusis
Hearing loss related to aging
What does a sound level meter measure?
Sound pressure
14 terms
Heat Stress (Part 2)
Signs of heat strain
Acclimatization for experienced worker
Acclimatization for unexperienced worker
Alternative acclimatization method
Over 140 bpm, over 38.5C, recovery heart rate over 110 bpm, s…
Spend 50% of shift exposed in hot conditions, increase by 10%…
Spend 20% of shift exposed in hot conditions, increase by 20%…
Increase physical demands each day (may take 1-3 weeks)
Signs of heat strain
Over 140 bpm, over 38.5C, recovery heart rate over 110 bpm, s…
Acclimatization for experienced worker
Spend 50% of shift exposed in hot conditions, increase by 10%…
8 terms
Heat stress injuries
heat stroke
heat stroke temp
heat exhaustion
heat exhaustion temp
medical emergency marked by hot, flushed and dry skin
105-130 degrees possible... 130 + degrees highly likely
serious injury, dehydration, skin is cold and clammy, weak di…
90-105 degrees possible ... 105-130 degrees likely
heat stroke
medical emergency marked by hot, flushed and dry skin
heat stroke temp
105-130 degrees possible... 130 + degrees highly likely
8 terms
EOOW - Heat stress
Tech man
Assigned personnel monitor spaces DB:
Conduct a survey:
Recovery time
5100.19E 30May07
1) every 4hrs manned spaces <85... 2) ever hour for manned >85... 3…
PHEL I-III... 1) =>100F watch/work less or = to 4hrs... 2) =>90F wa…
4hrs or double exposure limit
Tech man
5100.19E 30May07
Assigned personnel monitor spaces DB:
1) every 4hrs manned spaces <85... 2) ever hour for manned >85... 3…
36 terms
CH. 11 Heat Stress
Humans are only
Converted to heat
Hyperthermia
Thermoregulation
25%-27% efficient
About 75% of energy released from ATP
An increase in deep internal body temperature above normal
Ability of the body to maintain constant internal temp.
Humans are only
25%-27% efficient
Converted to heat
About 75% of energy released from ATP
60 terms
HEAT STRESS MONITOR
Heat Stress
Heat Injury or Death
1. Degraded Material Condition... 2. Ine…
Moisture in the air
What is any combination of air temperature, thermal radiation…
What happens when heat stress becomes excessive and exceeds t…
What are some factors that cause heat stress?
What is humidity?
Heat Stress
What is any combination of air temperature, thermal radiation…
Heat Injury or Death
What happens when heat stress becomes excessive and exceeds t…
47 terms
OSH 5 Heat Stress
What is Convection
What is Conduction
What is Heat Strain
Heat stroke is considered a...
Transfer of heat from one place to another by moving liquid o…
Transfer of heat from one point to another within a body or f…
Series of physiological responses to heat stress
...medical emergency
What is Convection
Transfer of heat from one place to another by moving liquid o…
What is Conduction
Transfer of heat from one point to another within a body or f…
14 terms
Heat and Cold Stress
More next day fatalities- hot or cold
More total fatalities- hot or cold
Environmental factors (4)
Individual factors (3)
hot
cold
1 outside temperature 2 wind 3 humidity 4 shelter
1 insulation 2 metabolism 3 workrate
More next day fatalities- hot or cold
hot
More total fatalities- hot or cold
cold
27 terms
ANS3440 Heat Stress
What is the severity of heat stress co…
What is the bovine thermal comfort zone?
What occurs during the bovine thermal…
What is the body temperature between?
The severity of heat stress is correlated to both ambient tem…
-13C to +25C
Within this temperature range, the animal comfort is optimal
38.4C and 39.1C
What is the severity of heat stress co…
The severity of heat stress is correlated to both ambient tem…
What is the bovine thermal comfort zone?
-13C to +25C
21 terms
Heat 3395 and Cold Stress
T8CCR 3395(e) states the following:... (e…
List of industries subject to Heat Ill…
Individual factors (3)
Heat syncope
True
(A) Agriculture... (B) Construction... (C) Landscaping... (D) Oil and…
1 insulation 2 metabolism 3 workrate
dizziness, fainting
T8CCR 3395(e) states the following:... (e…
True
List of industries subject to Heat Ill…
(A) Agriculture... (B) Construction... (C) Landscaping... (D) Oil and…
35 terms
CIH: Heat and cold stress
Heat transfer definition
Heat transfer equation
Convection
Radiation
Heat build up in the body is dependent on the ability of the…
Delta S=0; Delta S greater than 0 = core body temp is going u…
Transfer of heat directly to fluids containing body parts. Eq…
Transfer of heath through infrared heat transfer of heat thro…
Heat transfer definition
Heat build up in the body is dependent on the ability of the…
Heat transfer equation
Delta S=0; Delta S greater than 0 = core body temp is going u…
16 terms
CUTTER HEAT STRESS PROGRAM
Where heat stress can occur?
Temps that are considered to be on the…
What temps the WBGT take?
The value of the meter's WBGT and calc…
Engineering spaces, laundries, sculleries and workshops
100F+(dry bulb temp)
Wet bulb... Dry bulb... Globe temps
.2F
Where heat stress can occur?
Engineering spaces, laundries, sculleries and workshops
Temps that are considered to be on the…
100F+(dry bulb temp)
Heat Stress Afloat
MDR and Department Heads
NAVMED 6500/1
Humidity
Never
Who ensures exposure limits for personnel are being properly…
What form is used to report heat stress injuries
From the list of choices provided below, identify the factor…
Dry bulb thermometers are calibrated how often
MDR and Department Heads
Who ensures exposure limits for personnel are being properly…
NAVMED 6500/1
What form is used to report heat stress injuries
35 terms
CIH: Heat and cold stress
Heat transfer definition
Heat transfer equation
Convection
Radiation
Heat build up in the body is dependent on the ability of the…
Delta S=0; Delta S greater than 0 = core body temp is going u…
Transfer of heat directly to fluids containing body parts. Eq…
Transfer of heath through infrared heat transfer of heat thro…
Heat transfer definition
Heat build up in the body is dependent on the ability of the…
Heat transfer equation
Delta S=0; Delta S greater than 0 = core body temp is going u…
20 terms
Heat Stress in Camelids
Camelid normals
Domesticated camelids
Heat index and stress risk
Cooling
15-25yrs, Hr 60-90, 10-30rr, 102 degrees
llama = lama glama... Alpaca = vicugna pacos
<120 = good... 150 = caution, no extra activity... >180=danger! obs…
fiberless areas = abdomen, axillary space, inguinal and perin…
Camelid normals
15-25yrs, Hr 60-90, 10-30rr, 102 degrees
Domesticated camelids
llama = lama glama... Alpaca = vicugna pacos
11 terms
CPG - Hyperthermia Heat Stress
What are some basic non invasive cooli…
At that pt temperature should cool flu…
At what temperature should cool fluids…
Does the Environmental Hyperthermia He…
- Shelter / removal from heat source... - Airflow over pt... - Remo…
> 40°C
< 8°C
No
What are some basic non invasive cooli…
- Shelter / removal from heat source... - Airflow over pt... - Remo…
At that pt temperature should cool flu…
> 40°C
26 terms
Ch. 25 Heat & Cold Stress
Heat Stress
Homeostasis
Hypothalamus
Thermoregulation
Inability of the body to maintain homeostasis due to high tem…
State of balance in the body
Part of the diencephalon that regulates temperature in the br…
Process by which the body temperature is maintained
Heat Stress
Inability of the body to maintain homeostasis due to high tem…
Homeostasis
State of balance in the body
18 terms
Exam 3 (Heat Stress, Cold Stress)
Homeothermic
Increasing body temperature if cold
Dissipate heat
Thermal Neutral Zone
maintain constant body temperature within 1 deg cel... 2 deg fer
1. increase heat production ... a. shivering-muscle activity ... b…
1. increase loss via:... conduction (laying on cold surface), co…
range of comfort for animal (doesn't need to use extra mainte…
Homeothermic
maintain constant body temperature within 1 deg cel... 2 deg fer
Increasing body temperature if cold
1. increase heat production ... a. shivering-muscle activity ... b…
8 terms
EOOW DDG FLTIIA - Heat stress
Tech man
Assigned personnel monitor spaces DB:
Conduct a survey:
Recovery time
5100.19E 30May07
1) every 4hrs manned spaces <85... 2) ever hour for manned >85... 3…
PHEL I-III... 1) =>100F watch/work less or = to 4hrs... 2) =>90F wa…
4hrs or double exposure limit
Tech man
5100.19E 30May07
Assigned personnel monitor spaces DB:
1) every 4hrs manned spaces <85... 2) ever hour for manned >85... 3…
35 terms
BOW_11_Heat and cold stress
Heat transfer definition
Heat transfer equation
Convection
Radiation
Heat build up in the body is dependent on the ability of the…
Delta S=0; Delta S greater than 0 = core body temp is going u…
Transfer of heat directly to fluids containing body parts. Eq…
Transfer of heath through infrared heat transfer of heat thro…
Heat transfer definition
Heat build up in the body is dependent on the ability of the…
Heat transfer equation
Delta S=0; Delta S greater than 0 = core body temp is going u…
10 terms
Acute Heat Stress Summary of Changes
core and skin temp
cardiac output
stroke volume
heart rate
increase
increase (about 13 L/min)
increase
increase
core and skin temp
increase
cardiac output
increase (about 13 L/min)
6 terms
MFB - Heat Stress/Exhaustion/Stroke
Heat Stress - Signs
Heat Stress - Treatment
Heat Exhaustion - Signs
Heat Exhaustion - Treatment
Feeling hot, being flushed. ... Vigorous Perspiration. ... Muscular…
Stop Work, Move to a Cooler Place. ... Drink Water. ... Sit, Lie Do…
Feeling faint/dizzy. ... Vigorous Perspiration. ... Muscular Pain,…
Move away from work environment, lay them in shade. ... If consc…
Heat Stress - Signs
Feeling hot, being flushed. ... Vigorous Perspiration. ... Muscular…
Heat Stress - Treatment
Stop Work, Move to a Cooler Place. ... Drink Water. ... Sit, Lie Do…
31 terms
LAM- final- camelid heat stress
adults: 99- 102 degrees... neonates/juven…
true
HR: 60-90 bpm... RR: 10-30 breaths/min (b…
- combo of heat/humidity... - activity le…
What is the normal body temperature range for adult camelids?…
T/F: the body temp can raise to 104degrees in the summer in h…
What is the normal HR and RR in camelids?
What are some risk factors for heat stress in camelids?
adults: 99- 102 degrees... neonates/juven…
What is the normal body temperature range for adult camelids?…
true
T/F: the body temp can raise to 104degrees in the summer in h…
18 terms
Exam 3 (Heat Stress in Camelids)
top differentials for heat stress
Diagnosis of heat stress
Treatment
what happens that it has fluid in lung…
1. P. tenuius (CNS)... -no eosinophils = r/o... 2. meningitis, ence…
1. blood work... -elevated muscle (CK)... low Na, Cl, K
Low stress shearing... normalize body temperature... cold water bat…
decreased plasma proteins = pulmonary edema!!!
top differentials for heat stress
1. P. tenuius (CNS)... -no eosinophils = r/o... 2. meningitis, ence…
Diagnosis of heat stress
1. blood work... -elevated muscle (CK)... low Na, Cl, K
28 terms
Quiz 6 Flooding and heat stress
3 symptoms of drought stress
3 sources of salt in soil
4 detrimental effects of salinity
Na inhibits ________________ __________
Stunted growth... Tip Burn... Dark b/g color
Weathering of material... Seawater... Excessive fertilization
Nutrient imbalance... Membrane dysfunction... Adversely affects p…
enzyme activity
3 symptoms of drought stress
Stunted growth... Tip Burn... Dark b/g color
3 sources of salt in soil
Weathering of material... Seawater... Excessive fertilization
22 terms
CIH heat stress and strain TLV
Heat stress and strain TLV goal:
Heat stress definition
Heat stress -- Heat strain relationship
acclimatization
Maintain body temp within 1 degree of normal (37 C)
net heat load to which a worker may be exposed (from metaboli…
Heat stress is cause, heat strain is effect... Heat strain will…
gradual adaptation to heat stress (2 hours a day for 5 of las…
Heat stress and strain TLV goal:
Maintain body temp within 1 degree of normal (37 C)
Heat stress definition
net heat load to which a worker may be exposed (from metaboli…
10 terms
Drugs and effects on heat stress
Anticholingerics
Antihistamines
Gluthemide
Phenothiazines
(Atropine)... - impaired sweating
- impaired sweating
(Doriden)... - impaired sweating
(Antipsychotics; including Thorazine, Stelazine, Trilafon)... -…
Anticholingerics
(Atropine)... - impaired sweating
Antihistamines
- impaired sweating
28 terms
Small Animal: Heat Stress/Stoke
What are the 4 components to the physi…
What is the thermoregulatory organ?
What happens during thermoregulation?
4 Methods of head dissipation? How doe…
1) Thermoregulation... 2) Acclimatization... 3) Acute phase respons…
Hypothalamus
- Panting... - Peripheral vasodilation and central vasoconstrict…
1) Convection => air passing over patient... 2) Radiation => bod…
What are the 4 components to the physi…
1) Thermoregulation... 2) Acclimatization... 3) Acute phase respons…
What is the thermoregulatory organ?
Hypothalamus
32 terms
Environmental CH 3 heat stress
what is the focus of this chapter?
what are direct effects of hypothermia?
what are the direct effects that hypot…
how could cardiovascular insufficiency…
major issues and physiological responses during exercise in h…
1. mechanism of heat induced fatigue during exercise ... 2. neur…
1. cardiovascular insufficiency... 2.other 3.1 figure ... 3. Core t…
1. lose a lot of plasma volume through sweating ... 2. see a shi…
what is the focus of this chapter?
major issues and physiological responses during exercise in h…
what are direct effects of hypothermia?
1. mechanism of heat induced fatigue during exercise ... 2. neur…
44 terms
Integument Diseases and Heat Stress in Camelids
What are some problems with the integu…
Which skin problems are zoonotic?
Which skin problems cause hyperkeratos…
What types of mites do camelids get?
-Mites... -Dermatophytosis... -Contagious ecthyma... -Zn-responsive de…
-Dermatophytosis... -Contagoius ecthyma
-Zn-responsive dermatosis... -Ichthyosis
-Chorioptes bovis*... -Psoroptes sp... -Sarcoptes scabei var. auchi…
What are some problems with the integu…
-Mites... -Dermatophytosis... -Contagious ecthyma... -Zn-responsive de…
Which skin problems are zoonotic?
-Dermatophytosis... -Contagoius ecthyma
Ex Phys Lecture 9: Heat Stress
hypothalmus cannot decrease heat produ…
radiation
conduction
convection
initiates responses to dissipate heat by sensing changes in t…
exchange of heat energy from hot object to a cooler object th…
heat exchange between two objects that are touching, heat gen…
the movement of molecules ... slow results in warmer air next to…
hypothalmus cannot decrease heat produ…
initiates responses to dissipate heat by sensing changes in t…
radiation
exchange of heat energy from hot object to a cooler object th…
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