FPC Flashcards
Boyle’s Law
P1xV1+P2xV2 increased altitude = increased volume due to decreased pressure
Dalton’s Law = Dalton’s Gang
PT= P1+P2+P3 increased altitude = decreased gas pressure without lowering percentage of gas. Causes hypoxia at altitude.
Normal Torr at sea level
760
Torr
a unit of pressure used in measuring partial vaccuums,
Atmosphere Gas Composition
21% Oxygen 78% Nitrogen 1% Other
Henry’s Law= Henry’s Heineken
Gas in solution varies directly with the partial pressure of that same gas over the solution. Causes VQ mismatch due to pressure difference
Charles Law
V1/V2=T1/T2 Gas volume expands when heated and contracts when cooled. Pressure is constant.
Each 100m in elevation causes a temperature drop of….?
1C or 33.8F
Gay Lussac’s Law
P1/T1=P2/T2 As temperature changes, pressure changes. Volume stays the same. (Oxygen bottle in the sun)
Graham’s Law
Gasses with smaller mass diffuse faster than larger mass gasses.
Barotitis Media
descent problem, air trapped in middle ear
Barodontalgia
ascent problem, air trapped under recent dental work
Treatment of barodontalgia
slower ascent, consider analgesics
Barosinusitis
ascent problem (Treatments include descend, slower climb, neosynephrine, analgesics)
Barobariatrauma
Nitrogen from fatty tissue is released into plasma causing nitrogen narcosis (a drowsy state by breathing air under higher pressure that atmospheric pressure)
Treatment of Barobatiatrauma
pre-oxygenate obese patients with 100% oxygen causing nitrogen washout
Stressors of flight (8)
- decreased partial pressure of oxygen
- barometric pressure changes
- thermal changes
- noise
- vibration
- fatigue
- G forces
Factors effecting stressors of flight
Drugs Exhaustion Alcohol Tobacco Hypoglycemia
MSL
Mean sea level
AGL
Above ground level
ATM
Atmosphere
Troposphere
Lowest layer of the atmosphere, beginning at the Earth’s surface
Physiologic (Efficient) Zone
Zone of the atmosphere in which the human body is well adapted
Universal Gas Law
Equation of state of a hypothetical “ideal” gas; a gas law that obeys Boyle’s, Charles’ and Avogadros Law exactly.
hypoxic hypoxia
insufficient oxygen, condition prevents th=