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19 Cards in this Set
- Front
- Back
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What pressure is one atmosphere (ATM) |
760 torr |
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Boyle's law |
When temperature is constant, P and V are inverse. |
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Charles |
At constant P, T and V are proportional |
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Descent phase of flight injury |
Barotitis media |
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Ascent phase of flight injuries |
Barobariatrauma (nitrogen narcosis), barosinusitis, barodentalgia |
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Go every 1000 feet ascended, how does temperature change and what law is this? |
1000 ft, T down 2°C. Charles law |
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Gay Lussac's Law |
Charles brother. For constant V, P is proportional to T. Pressure exerted on the sides of the container |
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Dalton's law |
Total P is sum of all the partial pressures of all the gasses. As pressure decreases, concentration decreases. But still same partial pressures. (As gain altitude, SpO2 decreases due to more dispersed molecules) |
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Dalton's law equation |
Atm pressure x FiO2 = partial pressure at that altitude. 760 x .31 = 228 |
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Henry's Law |
Amount of gas dissolved in a solution is directly proportional to the P of the gas over the solution. Apply O2, more O2 will dissolve in blood. In pulmonary edema, O2 can't reach blood to dissolve |
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Atmospheres and altitudes |
1 atm 760 mmHg sea level 1/2 atm 380 mmHg 18,000 ft |
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Atmospheric pressure in water |
0 ft 1 atm 33 ft 2 atm 66 ft 3 atm |
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Bedside PaO2 calculation |
(700 x FiO2) - 50 |
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Time of useful consciousness at 40,000 30,000 25,000 18,000 |
15-20 sec 1-2 min 3-5 min 20-30 min |
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Desired O2 per altitude equation What law is this? |
(FiO2 x P1)/ = FiO2 at new altitude P2 Dalton's law |
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PaO2 will decrease by _______ mmHg for every _______ ft increase in altitude |
5 mmHg 1000 ft |
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Flicker vertigo hertz range |
4-20 hz |
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Hypoxia causes night vision loss at this altitude |
4,000 ft |
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Graham's law |
The rate of diffusion or effusion of a gas is inversely proportional to the square root of it's molecular weight |
