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Flight Physiology
terms used in flight physiology
29
Aviation
Not Applicable
03/03/2011

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Term
boyle's law
Definition
volume is inversely proportional to pressure
Term
atmospheric composition
Definition
78% nitrogen, 21% oxygen
Term
dalton's law
Definition
total barometric pressure = sum of partial pressures
Term
henry's law
Definition
amount of dissolved gas in a liquid will decrease if pressure around liquid decreases
Term
physiological zone
Definition
sea level to 10,000'MSL
we adapt in this zone
Term
physiological deficiancy zone
Definition
10,000'-50,000'
majority of commercial flying
hypoxia due to altitude, trapped gas problems
Term
respiration
Definition
an exchange of gases in the body
absorb oxygen, eliminate carbon dioxide
Term
hypoxia
Definition
lack of oxygen in the body to the point where function is impaired
4 types
Term
hypoxic hypoxia
Definition
partial pressure of oxygen insufficient
Term
hypemic hypoxia
Definition
reducing oxygen-carrying capacity
smoking
Term
stagnant hypoxia
Definition
oxygen deficiancy due to impaired circulation
pulling G's
Term
histotoxic hypoxia
Definition
tissue cells poisoned and unable to use oxygen
alcohol and cyanide in burning aircraft
Term
hypoxia symptoms
Definition
same as drunk-
headache
decreased reaction time
impaired judgement
euphoria
visual impairment
drowsiness
lightheaded or dizzy
tingling in fingers and toes
numbness
blue fingertips(cyanosis)
limp muscles
Term
EPT
Definition
effective performace time
amount of time from loss of adequate oxygen in which and individual can perform effectively
Term
find EPT
altitude-20,000'
Definition
30+ minutes
Term
find EPT
altitude-25,000'
Definition
3-5 minutes
Term
find EPT
altitude-30,000'
Definition
1-2 minutes
Term
find EPT
altitude-40,000'
Definition
15-20 seconds
Term
factors influencing EPT
Definition
altitude, rate of ascent, physical activity
Term
oxygen federal regulations
Definition
12,500'MSL - +30 min - crew
14,000'MSL - anytime - crew
15,000'+MSL - anytime - all on plane
Term
hyperventilation
Definition
respirations too rapid/deep for current physical activity
results in abnormal loss of CO2 from blood
Term
normal breathing rate
Definition
12-16 breathes per minute
Term
causes of hyperventilation
Definition
emotional tension or stress
fear or anxiety
pain
pressure breathing equipment
Term
hyperventilation symptoms
Definition
dizziness
hot and cold sensations
tingling of hands, legs, or feet
muscle spasms
nausea
sleepiness
unconsciousness
Term
hypoxia & hyperventilation
corrective actions
Definition
correct for any potential of hypoxia
check oxygen equipment for proper function
breathe normally
-solved now = hypoxia
-not solved = hyperventilation
ns-breath slover, breathe into bag, talk aloud
Term
trapped gas locations
Definition
ear, sinus, tooth, gastrointestinal
Term
IMSAFE list
Definition
illness
medications
stress
alcohol
fatigue
emotions/eating
Term
vision anatomy
Definition
cones-middle of eye, see front, day
rods-sides of eye, see peripheral, night
Term
blind spots
Definition
day-off center in front of eye
night-focal center, look 5-10degrees away from spot
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