Stages of Hypoxia Flashcards Preview

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Flashcards in Stages of Hypoxia Deck (11):
1

Indiffrent Stage

0 - 10,000ft

Loss of night vission as low as 5,000ft.

2

Compensatory Stage

10,000 - 15,000
Physiological compensations provide some defense against hypoxia

May be some increase in depth of RR and rate, HR and CO

3

Disturbance Stage

15,000 - 20,000

In this stage the physiological compensations do not provide adequate oxygen for the tissues.

may include fatigue, exhaustion, drowsiness, dizziness, headache, breathlessness, and euphoria.

4

Critical Stage

>20,000

In the critical stage consciousness is lost. Death follows shortly.

5

Time of useful consciousness 20,000ft

30 MIN

6

Time of useful consciousness 25,000ft

3 - 5 MIN

7

Time of useful consciousness 35,000ft

< 1 MIN

8

Time of useful consciousness 45,000ft

10 - 15 SEC

9

Combat Hypoxia

Suplamental oxygen and rapid desent below 10,000ft

10

what factors put you at risk for hypoxia

(D.E.A.T.H) Drugs, Alcohol, Exhaustion, Tabaco, Hypoglycemia.

11

14 CFR 135.89

Unpressurized aircraft flying at 10,000 - 12,000 for more then 30 min crew must be on oxygen

Above 12,000 must use oxygen.