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FP-C > Flight Physiology > Flashcards

Flight Physiology Flashcards

1
Q

Barodentalgia Definition, Identification, and Treatment.

A

Excruciating pain caused by pressure increase in dental work or gum abscess. Identified as an ascent problem. Immediate abortion of flight.

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2
Q

Decrease in PaO2 per 1000 ft increase in altitude

A

5mmHg

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3
Q

Rapid decompression TOUC at 28,000 ft

A

2-3 minutes

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4
Q

Indifferent Stage of Hypoxia

A 
Altitude 0-10,000ft
SpO2 90-98%
Decrease in night vision at 4,000 ft
HR and RR increase
Unaware of symptoms
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5
Q

Barobariatrauma Definition, Identification, and Treatment.

A

Nitrogen narcosis in morbidly obese patients. Identified as an ascent problem. High flow oxygen prior to departure.

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6
Q

Henry’s Law

A

The amount of gas dissolved in a solution is directly proportional to the pressure of the gas over the solution.

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7
Q

Rapid decompression TOUC at 35,000 ft

A

30-60 seconds

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8
Q

Altitude to temperature relationship

A

1000ft increase = 2 degrees celsius decrease

150m increase = 1 degree celsius decrease

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9
Q

Rapid decompression TOUC at 43,000ft and above

A

9-12 seconds

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10
Q

Boyle’s Law

A

As altitude increases the atmospheric pressure decreases and gas in an enclosed space will expand
P1V1=P2V2

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11
Q

Bedside PaO2 calculation

A

(P1 x FiO2) - 50

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12
Q

Increasing PEEP is an example of which law?

A

An example of Fick’s law

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13
Q

DEATH mnemonic

A 
Drugs
Exhaustion
Alcohol
Tobacco
Hypoglycemia
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14
Q

Atmospheric Pressure at 18,000 ft (mmHg, torr, inHg, ATM)

A

380mmHg, 380 torr, 14.96 inHg, 0.5 ATM

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15
Q

Atmospheric Pressure at Sea Level (mmHg, torr, inHg, ATM)

A

760 mmHg, 760 torr, 29.92 inHg, 1 ATM

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16
Q

Critical Stage of Hypoxia

A

Altitude 20,000-25,000ft
SpO2 60-70%
Tremors, seizures, LOC, coma, death

17
Q

Gay-Lussac’s law

A

For a given mass and constant volume of gas, the pressure exerted on the sides of it container is directly proportional to its absolute temperature.

18
Q

Rapid decompression TOUC at 25,000 ft

A

3-5 minutes

19
Q

Charles’ Law

A

The relationship between temperature and volume are proportional at a constant atmospheric pressure. As the temperature goes up, gas volume expands. As the temperature goes down, volume decreases.

20
Q

Barotits Media Definition, Identification, and Treatment.

A

Inability to regulate temperature in inner ear due to eustachian tube blockage. Identified as a descent problem. Valsalva or chewing gum.

21
Q

Dalton’s Law

A

The total pressure of gas mixture is the sum of the partial pressures of all gases. In addition, it describes how a pressure is exerted by a gas at various altitudes, and how that pressure affects the partial pressure of the said gas

22
Q

PaO2

A

Partial pressure of oxygen in arterial blood

23
Q

Smokers lose what percentage of their night vision at 5,000 ft ?

A

20%

24
Q

Graham’s Law

A

The rate of the diffusion of a gas is inversely proportional to the square root of its molecular weight. This means that diffusion will happen at a faster rate if the gas is thinner and at a slower rate if the gas is heavier.

25
Q

Disturbance Stage of Hypoxia

A

Altitude 15,000-20,000ft
SpO2 70-80%
Decrease in sense, CNS, and psychomotor
Signs: Hyperventilation and cyanosis

26
Q

Increasing FiO2 is an example of which law?

A

An example of Dalton’s law

27
Q

Compensatory Stage of Hypoxia

A

Altitude 10,000-15,000ft
SpO2 80-90%
Night vision < 50%
CNS symptoms: poor judgement, irritability, drowsiness

28
Q

Rapid decompression TOUC at 18,000 ft

A

20-30 minutes

29
Q

Providing PPV is an example of which law?

A

An example of Henry’s law

30
Q

How long into gestation is surfactant typically produced?

A

37 weeks gestation

31
Q

Calculation for desired FiO2 accounting for increase in elevation

A

(FiO2 x P1)/P2

32
Q

Rapid decompression TOUC at 40,000 ft

A

15-20 seconds

33
Q

Rapid decompression TOUC at 22,000 ft

A

5-10 minutes

34
Q

Fick’s Law

A

The rate of diffusion of a gas across a permeable membrane is determined by the chemical nature of the membrane itself, the surface areas of the membrane, the partial pressure gradient of the gas across the membrane, and the thickness of the membrane.

35
Q

Barosinusitis Definition, Identification, and Treatment.

A

Inability to regulate sinus pressure due to inflammation or blockage. Identified as an ascent problem. Valsalva or chewing gum.

36
Q

PAO2

A

Partial pressure of oxygen in the alveoli

FP-C (6 decks)

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