IA Med/ACE Flight Physiology Questions and Correct Answers the Latest Update and Recommended Version
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Course
IA Med/ACE
Institution
IA Med/ACE
What are relative contraindications for taking patients in flight?
Anemia (low Hgb) and 24+ week gestation pregnancy. The rise in altitude can trigger
baroreceptors and induce early labor
What is AGL in flight physiology?
Above ground level. (Aircraft to ground level)
What is MSL in flight ...
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IA Med/ACE Flight Physiology
Questions and Correct Answers the
Latest Update and Recommended
Version
What are relative contraindications for taking patients in flight?
✓ Anemia (low Hgb) and 24+ week gestation pregnancy. The rise in altitude can trigger
baroreceptors and induce early labor
What is AGL in flight physiology?
✓ Above ground level. (Aircraft to ground level)
What is MSL in flight physiology?
✓ Mean Sea Level (how far from the plane to the mean sea level)
What is ASL in flight physiology?
✓ Above sea level. So instead of the mean, this is the actual distance from the aircraft to the
sea if you're flying over it
What decreases with altitude? What stays the same?
✓ The actual oxygen concentration of 21% is the same, but the partial pressure of oxygen
decreases. So diffusion is not as readily available since the high pressure moves to low
pressure areas for diffusion across alveoli. Well less pressure means the process occurs
slower. So your body has to work harder due to the lower pressure to maintain the same
perfusion. PR and RR increase
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✓ 760 Torr. (One atmosphere)
If I dive three atmosphere, how many feet is that? If I dive 99 feet, how many atmosphere is
that?
✓ 66. One at the surface, plus two more
✓
✓ 4 atmosphere. one at the surface, plus three atmosphere
How many feet is 1/2 atmosphere?
✓ 18k ft MSL (mean sea level)
What zone is the space zone?
✓ Anything above 50,000 ft
What would exit your body at 63k feet?
✓ All fluids because there's no pressure to hold it in. If you weren't in a pressurized cabin
Name the altitude zones.
✓ Space equivalent - 50,000ft + MSL
✓ Deficient zone - 10,000-50,000 feet
✓ Efficient zone - Sea level - 10,000 feet
Can you survive in the deficient zone?
✓ Yes, but your body will compensate through PR and RR because it has to work harder to
maintain oxygenation and perfusion by increasing cardiac output. Due to low pressure
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