TC 3-04.93 Aeromedical Training for Flight Personnel UPDATED
ACTUAL Questions and CORRECT Answers
1. Definition of Hypoxia Hypoxia is defined as the state of O2 deficiency in the blood cells and
tissues significant enough to cause impairment of function.
2. Types of hypoxia Hypoxic
Hypemic
Stagnant
Histotoxic
3. Definition of Hypoxic Occurs when there is not enough O2 in the air or when decreasing
Hypoxia atmospheric pressure prevents diffusion of O2 from the lungs to the
bloodstream.
4. Definition of Hypemic Hypemic, or anemic hypoxia is caused by a reduction in blood's O2-car-
Hypoxia rying capacity. Anemia and blood loss are the most common types of this
type of hypoxia.
5. Definition of Stagnant Blood's O2-carrying capacity is adequate but circulation is inadequate.
Hypoxia Blood vessels are compressed and not enough blood is reaching the
tissues. Conditions such as heart failure, arterial spasm, and blood Bessel
occlusion predispose affected individuals to stagnant hypoxia.
6. Definition of Histotoxic Results from interference with the use of O2 by body tissues. Alcohol,
Hypoxia narcotics, or poison such as cyanide can poison the tissues inhibiting it
from using available O2.
7. Stages of Hypoxia Indifferent
Compensatory
Disturbance
Critical
8. Describe the oxygen 98%-90% oxygen saturation
saturation level, alti- 0-10,000 feet
tude and symptoms as- Decreased night vision at 4,000 feet MSL
, sociate with the indif-
ferent stage.
9. Describe the oxygen 89%-80% oxygen saturation
saturation level, alti- 10,000-15,000 feet
tude and symptoms as- Drowsiness, poor judgment, impaired coordination and eflciency
sociate with the com-
pensatory stage.
10. Describe the oxygen 79%-70% oxygen saturation
saturation level, alti- 15,000-20,000 feet
tude and symptoms as- Impaired flight control, handwriting, speech, vision, intellectual function,
sociate with the distur- and judgement, decreased coordination, memory, and sensation to pain
bance stage.
11. Describe the oxygen 69%-60% oxygen saturation
saturation level, alti- 20,000 feet and above
tude and symptoms as- Circulatory and central nervous system failure, convulsions, cardiovascular
sociated with the criti- collapse, death
cal stage.
12. Prevention of Hypoxia Limit time at altitude
Use supplemental oxygen
Pressurize the cabin
13. Define Hyperventila- An excessive rate and depth of respiration that leads to an abnormal
tion loss of CO2 from blood that can lead to changes in the body's acid base
balance resulting in negative side-effects.
14. Define Stress Stress is the nonspecific response of the body to any demand. It can also
be thought of as the rate of wear and tear on the body.
15.
ACTUAL Questions and CORRECT Answers
1. Definition of Hypoxia Hypoxia is defined as the state of O2 deficiency in the blood cells and
tissues significant enough to cause impairment of function.
2. Types of hypoxia Hypoxic
Hypemic
Stagnant
Histotoxic
3. Definition of Hypoxic Occurs when there is not enough O2 in the air or when decreasing
Hypoxia atmospheric pressure prevents diffusion of O2 from the lungs to the
bloodstream.
4. Definition of Hypemic Hypemic, or anemic hypoxia is caused by a reduction in blood's O2-car-
Hypoxia rying capacity. Anemia and blood loss are the most common types of this
type of hypoxia.
5. Definition of Stagnant Blood's O2-carrying capacity is adequate but circulation is inadequate.
Hypoxia Blood vessels are compressed and not enough blood is reaching the
tissues. Conditions such as heart failure, arterial spasm, and blood Bessel
occlusion predispose affected individuals to stagnant hypoxia.
6. Definition of Histotoxic Results from interference with the use of O2 by body tissues. Alcohol,
Hypoxia narcotics, or poison such as cyanide can poison the tissues inhibiting it
from using available O2.
7. Stages of Hypoxia Indifferent
Compensatory
Disturbance
Critical
8. Describe the oxygen 98%-90% oxygen saturation
saturation level, alti- 0-10,000 feet
tude and symptoms as- Decreased night vision at 4,000 feet MSL
, sociate with the indif-
ferent stage.
9. Describe the oxygen 89%-80% oxygen saturation
saturation level, alti- 10,000-15,000 feet
tude and symptoms as- Drowsiness, poor judgment, impaired coordination and eflciency
sociate with the com-
pensatory stage.
10. Describe the oxygen 79%-70% oxygen saturation
saturation level, alti- 15,000-20,000 feet
tude and symptoms as- Impaired flight control, handwriting, speech, vision, intellectual function,
sociate with the distur- and judgement, decreased coordination, memory, and sensation to pain
bance stage.
11. Describe the oxygen 69%-60% oxygen saturation
saturation level, alti- 20,000 feet and above
tude and symptoms as- Circulatory and central nervous system failure, convulsions, cardiovascular
sociated with the criti- collapse, death
cal stage.
12. Prevention of Hypoxia Limit time at altitude
Use supplemental oxygen
Pressurize the cabin
13. Define Hyperventila- An excessive rate and depth of respiration that leads to an abnormal
tion loss of CO2 from blood that can lead to changes in the body's acid base
balance resulting in negative side-effects.
14. Define Stress Stress is the nonspecific response of the body to any demand. It can also
be thought of as the rate of wear and tear on the body.
15.
