Flight Topics Flashcards
4 relative contraindications for flight
severe anemia
pregnancy beyond 24wga
uncontrolled arrythmia
weight/space confines
sea level barometric pressure
760 torr or 1 atmosphere
pressure at 10K ft
523 torr
pressure at 18K ft
380 torr or 1/2 atmosphere
4 altitude zones
physiologic zone
physiologically deficient zone 10-50K
space equivalent zone over 50K
how can you tell if your plane is experiencing rapid decompression
cooler temperatures in the cabin & window fogging
plane has window fogging
rapid decompression
what happens to TUC if rapid decompression
rapid decompression (cold & window fogging) cuts TUC in half
Boyle’s law
pressure & volume
what type of trauma shoudl not fly b/c of Boyle’s law
open/decompressed skull fracture
Charles’ law
volume & temp
volume & temp
Charle’s law
how do you use Charle’s law
explains how well an aircraft performs depends on weather
*ideal flying conditions are a dry cold day
ideal flying day
dry and cold
b/c Charles’ law
effect of Dalton’s law
soft tissue swelling at altitude
Fick’s law
diffusion of gas is proportional to the difference in partial pressure & the area of the membrane
*inversely proprotional to the thickness of athe menmbrane
law regarding gas diffusion
Fick’s law
*propportional to partial pressure, area of the the membrane and inversely to the thickness of the membrane
law that explains gas diffusion across the alveoli
FIck’s law
how to remember what Henry’s law does
Henry = Heiniken
Henry’s law
solubility of gas in a liquid* quantity of gas dissolved in 1ml is proprotional to the partial pressure of gas above it
law tht explains the bends
Henry’s law
solubility of gas in a liquid is the amount of gas that dissolves is proprotional to the partial pressure of the gas above it
solubility of a gas in a liquid is proprotional to the partial pressure of the gas above it
Henry’s Law
what happens in the bends
compressed nitrogen molecules allows it to dissociate from adipose tissue
ATM and feet below the surface
Q33 ft = 1 atm "martini rule" ATM above surface 1 ATM at sea level 1/2 ATM at 18K ft
Gay Lussac’s law
temp & pressure
temp & pressure
Gay Lussac’s Law
oxygen cylinder and gas law
temperature drop means lower oxygen reading
what gas law explains why you have to add air to your tires in windter
cold temp so lower pressure
Ideal Gas Law
Boyle + Charles + G-L
Graham’s Law
law of gasseous diffusion
gas exchange at the cellular level
*the rate of diffusion of a gas through a liquid medium is directly related to the solubiliyt of hte gas and is inversly proportional to the square root of its density
what law limits gas ability to move through a liquid
Graham’s law
best weather for flying
air expands when hot
best lift is in cold dry air
partial pressure as altitude increases
Dalton’s = partial pressure decreases even though the % of gas is uniform
action of Fick’s Law
increase partial pressure = increased oxygen
SO….add Fi/O2, partial pressure and surface area incease
Diving adds pressure when surfacing nitrogen comes out of a solution
Henry’s Law
increased pressure = increased gas solubility
Henry’s Law
decreased pressure = decreased temperature
G-L law
increased diffusion = decreased molecular weight
Graham’s law
lower molecular weight can diffuse easier (CO2)
total pressure = P1 + P2…
Dalton’s law
oxygen adjustment calculation for flight
FiO2 x P1
divided by P2 = FiO2 needed for flight
P1 = pressure you are at (ground) P2 = pressure you are flying to/crusing altitude
when does teeth pain occur when flying
barodontalgia on ascent
air trapped in fillings expans
when do ears hurt when flying
descent
what causes barotitis
ear pain
air trapped in the middle ear can’t get through the blocked eusachian tube
when do you experience barosinusitis
both ascent and escent
referred maxillary pain
cutis marmorata
mottled skin that looks like a sunburn
in skin bends
pt feels ants on their skin
skin bends. nitrogen bends
transprot a diving injury
ground
if air, pressurize flixed wing or 1ooo
barbariotrauma
sudden release of nitrogen stored in lipids when going to altitude
treat bariobariotrauma
nitrogen washout w/10L/min nonrebreather for 15 min prior to flight
pressure 66ft under water
2 ATM
pressure 33 ft under water
1 ATM
pressure increase underwater
1 ATM per 33 ft
4 types of hypoxia
hypoxic - not enought oxygen in air (partial pressure)
stagnant- blood sin’t moving
hypemic -anemia
histotoxic- hypoxia at cellular level
causes of stagnant anemia
high G forces
cardiogenic shock
anemia of high G force
stagnant anemia
anemia of cardiogenic shock
stagnant anemia
anemia of hemorrhage
hypemic - hypoxia at blood level