Human Factors Flashcards

1
Q

Where is pressure half of what it is at sea level?

A

18,000’

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2
Q

What are the 2 main effects of decreased pressure on the body?

A
  1. Fall in pressure gradient in which oxygen is delivered to lungs
  2. Expansion of bodily gases
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3
Q

What is Hypoxia?

A

Inadequate oxygenation of body’s tissues

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4
Q

What are the 4 Types of Hypoxia?

A

Hypoxic - Inadequate oxygen in air
Anaemic - Too few blood cells (CO)
Stagnant - G force
Histotoxic - Poison

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5
Q

What is the Time of Useful Consciousness at 10, 20, 30, 40 and >45,000’?

A

10 - Hours
20 - 5 - 12 mins
30 - 45 - 75 secs
40 - 15 - 30 secs
>45 - 12 - 15 secs

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6
Q

What is Hyperventilation?

A

Breathing more rapidly than necessary

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