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Flight Physiology Flashcards

1
Q

The pressure of a gas is inversely proportional to the volume of a gas at a constant temperature.

A

Boyle’s Law

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2
Q

Boyle’s Law

A

The pressure of a gas is inversely proportional to the volume of a gas at a constant temperature.

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3
Q

Boyle’s formula

A

P1V1 = P2V2

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4
Q

Boyle’s Law affects:

A

ETT cuffs (9x the volume)
MAST trousers
air splints
IV drip rates (air in bag expands and increases rate)

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5
Q

If pneumocephalus present, intracranial pressure will

A

increase

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6
Q

Dalton’s Law

A

The total pressure of a gas mixture is the sum of the partial pressures of all the gases in the mixture.

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7
Q

The total pressure of a gas mixture is the sum of the partial pressures of all the gases in the mixture.

A

Dalton’s Law

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8
Q

Law of Partial Pressures (additive gas law)

A

Dalton’s Law

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9
Q

This law is responsible for soft tissue swelling at altitude (uptake of inert gases into tissue).

A

Dalton’s Law

Pt = P1+P2+P3+P4…+Pn

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10
Q

Charles’ Law

A

At a constant pressure, the volume of gas is directly proportional to the absolute temperature of the gas.

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11
Q

At a constant pressure, the volume of gas is directly proportional to the absolute temperature of the gas.

A

Charles’ Law

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12
Q

This law has very little effect on the human body

A

Charles’ Law

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13
Q

Gay-Lussac’s Law

A

Directly proportional relationship between temperature and pressure.

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14
Q

Directly proportional relationship between temperature and pressure.

A

Gay-Lussac’s Law

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15
Q

Gay-Lussac’s Law formula

A

P1/T1 = P2/T2

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16
Q

Charles’ Law formula

A

V1/T1 = V2/T2

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17
Q

Gay-Lussac’s example:

A

add air to tires in winter (colder temps, lower pressure)

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18
Q

Graham’s Law

A

Law of gaseous diffusion

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19
Q

Law of gaseous diffusion

A

Graham’s Law

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20
Q

Gas exchange at the cellular level

A

Graham’s Law

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21
Q

The rate of diffusion of a gas through a liquid medium is directly related to the solubility of the gas and inversely proportional to the square root of its density

A

Graham’s Law

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22
Q

Graham’s Law

A

The rate of diffusion of a gas through a liquid medium is directly related to the solubility of the gas and inversely proportional to the square root of its density

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23
Q

Graham’s Law limits the ability of gas to move through

A

liquid

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24
Q

Henry’s Law

A

Solubility of gas in liquid

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25
Solubility of gas in liquid
Henry's Law
26
Henry's Law
The quantity of gas dissolved in 1 cm3 (1mL) of a liquid is proportional to the partial pressure of the gas in contact with the liquid.
27
The quantity of gas dissolved in 1 cm3 (1mL) of a liquid is proportional to the partial pressure of the gas in contact with the liquid.
Henry's Law
28
Law associated with decompression sickness
Henry's Law
29
Affects divers, can lead to decompression sickness ("the bends").
Henry's Law
30
The most common form of decompression sickness:
The Bends
31
Boyle's Pneumonic
Balloon | Barotrauma
32
Boyle's example(s):
Air filled medical device expansion Pneumocephalus AGE
33
Dalton's Pneumonic
Dalton's Gang
34
Dalton's example(s):
Soft tissue swelling at altitude
35
Charles' Pneumonic
Charging Charles
36
Charles' example(s):
oxygen tank getting hot when filled
37
Graham's Pneumonic
Grey matter
38
Graham's example(s):
gas bubbles from exposed grey matter
39
Henry's Pneumonic
Heineken
40
Henry's example(s):
decompression sickness (the bends)
41
Decompression sickness such as the "Bends" is related to which law
Henry's Law
42
How many types of decompression sickness are there?
6
43
Type I Decompression Sickness signs/symptoms:
nitrogen related painful joints, mottled skin, pruritic itching
44
Patient may have this sensation in Type I Decompression Sickness:
ants crawling on skin
45
Cutis marmorata
mottle skin associated with Type I decompression sickness; can look like a sunburn
46
Type II Decompression Sickness signs/symptoms:
neurologic s/s | hypovolemic shock
47
In all diving injuries/decompression sickness, this type of transport is preferred:
Ground
48
Arterial Gas Embolism (AGE) is related to which law?
Boyle's (barotrauma)
49
(AGE) Breath holding during ascent on a dive, air pushes through the alveoli and enters the skin in the neck/chest causing a:
Pneumothorax
50
(AGE) Air is forced into blood vessels; bubbles block blood vessels, causing:
ischemia
51
(AGE) Patient presents with stroke-like symptoms (AMS, syncope, dizziness) and may also have a:
cough and epistaxis
52
AGE requires immediate:
hyperbaric treatment
53
Patients with AGE must fly in a
pressurized aircraft (fixed wing) or rotary wing <1000ft MSL
54
Pulmonary overpressurization (POP) is related to which law?
Boyle's Law
55
The greatest pressure differences are just below the surface of the water:
= 4 foot depth
56
(POP) A syndrome that occurs when "breath holding" compressed air during ascent causes:
lung over-expansion ruptures alveoli pneumothorax mediastinal emphysema
57
(POP) is common in
inexperienced divers
58
(Atmosphere calculations) | Every 33 feet below water is:
1 atmosphere
59
(Atmosphere calculations) | Sea level =
1 ATM
60
(Atmosphere calculation) | 33 feet under water =
2 ATM
61
(Atmosphere calculation) | 66 feet under water =
3 ATM
62
ATM may also be written as
atmospheres absolute, or ATA
63
Diver's Alert Network (DAN)
24 hour hotline for diving related injuries and questions
64
DAN network website
www.diversalertnetwork.org
65
DAN hotline
(919) 684-9111
66
AGL
above ground level
67
ASL
above sea level
68
MSL
mean sea level
69
ASL and MSL are
equivalent

FPC (17 decks)

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