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Aero Med > Physiiology > Flashcards

Physiiology Flashcards

1
Q

Atmosphere

A
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2
Q

Troposphere

A
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3
Q

Ionosphere

A
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4
Q

Ionospheres

A
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5
Q

Phyiological zones

A

Space equivalent zone (50,000 ft)

Deficient zone (10,000 ft to 50,000 ft)

Efficient zone (sea level to 10,000 ft)

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6
Q

Composition of air

A

78% nitrogen

21 oxygen

1% other

.03 co2

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7
Q

Atmospheric pressure

A

The measurement of pressure exerted on the earths surface from gases and water in the atmosphere

Measured in mercury

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8
Q

Permenant gases

A

Nitrogen

Oxygen

Argon

Noble gases

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9
Q

Variable gases

A
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10
Q

Significant pressure altitudes

A

0

18,000. 380 mmgh 1/2

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11
Q

Boyles law

A

The volume of a given gas varies invesrly with its pressure at constant temp

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12
Q

Dalton’s law

A

The total pressure of a gas mixture is the sum of the individual pressure (or partial pressure) of all gases in the mixture

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13
Q

Henry’s law

A

The quantity of gas dissolved in a given volume of liquid is proportional of the partial pressure of the gas in contact with the above liquid.

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14
Q

Grahams law

A

Describes rates of effusion (gas movement through a pin hole) will equalize out

Transfer of gases between atmosphere and lungs

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15
Q

Circulatory functions

A
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16
Q

System components of circulatory

A

Artieris (oxygenated)

Veins (deox)

Capalaries

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17
Q

Components of blood

A

Plasma

White blood cells

Platelets

Red blood cells

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18
Q

The red blood cell

A

Saturation of

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19
Q

Respiratory functions

A

Intake of oxygen

Removal of carb dox

Maintenance of heat balance

Maint of body acid base balance

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20
Q

Phases of respiration

A

Inhalation is active

Exhalation is passive l

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21
Q

Gaseous diffusion

A

Gas molecules of higher pressure move in the direction of gas monc

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22
Q

Gas exchange n lungs

A

Gas exchange between avid abs capillaries.

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23
Q

Hypoxia

A

S l States of oxygen deficiency in the blood cells abs tissues sufficient to cause impairment of function

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24
Q

How many types of hypoxia

A

4

25
Q

What are the 4 types of hypoxia 7?

A

Hypoxia
hypemic
Stagnant
Historic

26
Q

Hypoxia hypoxia

A
27
Q

Hyspemic hypoxia

A

Two -
Carbonmonoxide takes up too much room in blood

28
Q

Stagnant hypoxia

A

Oxygen carrying is good but circulation is not adequate

(Pressure points or g forces)

29
Q

Historic hypoxia

A

Inability

30
Q

Symptoms of hypoxia

A

Air hunger
Apprehension
Fatigue
Nausea
Headache
Dizziness
Blurred vision
Hot and cold flashes
Euphoria
Belligerence
Nu mbness
Tingling
Denial

31
Q

Signs of hypoxia

A

Hyperventilation
Blueing of lips a finger tips
Mental confusion
Poor judgment
Loss of muscle coordination
Unconsciousness
Slouching

32
Q

Hypoxia prevention /treatment

A

Limit time at altitude
pressurized cabin
Minimize self imposed stressors
100% oxygen
Treatment
100% oxygen
Descend altitude

33
Q

Army aviation hypoxia prevention (approved oxygen will be used by aircraft crews r occupants for flights as follows

A

-

34
Q

Stages of hypoxia icdc

A

’

35
Q

Indifferent stage

A

Altitudes sea level to 10,000ft
Oxygen saturation: 98-90%

36
Q

Compensatory stage

A

10,000 to 15000 ft

Oxygen sat

37
Q

Disturbance stage

A

15,000 to 20000

Oxygen sat 79,70%
Symptoms

38
Q

Critical stage

A

Altitudes, 20,000 ft above

39
Q

Factors modifying hypoxia symptoms

A

Pressure altitude
Rate of ascent
Time at altitude
Temp
Physical activity
Individual factors
Physical fitness
Self-imposed stressors

40
Q

Time of useful consciousness

A
41
Q

Hyper ventilation

A
42
Q

Hyperventilation systems

A
43
Q

Corrective measures

A
44
Q

Hyperventilation or hypoxia

A

I

45
Q

Gas t

A

Lee

46
Q

Gas expansion

A
47
Q

Ear abs sinus blocks

A
48
Q

Treatment of ear abs sinus blocks

A

On ascent ( rare )
On the

49
Q

Barodontalgia

A

Tooth pain due to change in barometric pressure

50
Q

Evolved gas disbarsism

A

-

51
Q

Evolved gas disorders

A

Decompression sickness

Type I
- bends
- skin manifestations

Type ll
- chokes
- central nervous

52
Q

The bends

A

When nitrogen gets trapped between joints

53
Q

Skin manifestation

A

Nitrogen bubbles under the skin

54
Q

The chokes

A

Nitrogen bubbles block the smaller pulmonary vessels

55
Q

Central nervous system

A

Nitrogen bubbles are trapped in the brain or against
. The nervous system

56
Q

Predisposing factors for Dcs

A

Rate of ascent
Altitude
Body fat content
Age

57
Q

Dcs prevention

A

De-nitrogenation
Pressurized cabin
Limit time at altitude

58
Q

Scuba divers beware

A

24 hour between flying after diving

59
Q

Dcs treatment

A

Descend to the ground level
100% oxygen
Land at

Aero Med (4 decks)

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