New Facts Flashcards
What is the primary symptom of DCS?
The bends (joints).
What is the critical threshold for aircraft without an oxygen supply?
20,000 ft
Why must you take caution when donating blood before flying?
You are more susceptible to hypoxia.
State the Time or Useful Consciousness.
20,000 ft - 30 mins
30,000 ft - 1-3 mins
35,000 ft - 30-90 secs
40,000 ft - 15-20 secs
What does hyperventilation cause?
Respiratory alkalosis.
Where are the ossicles located and what are they made up of?
In the middle ear.
Malleus, incus, stapes.
What systems are involved in the onset of motion sickness?
Vestibular system, vision, proprioceptive senses.
What can linear accelerations (Gx) cause?
Slight physiological consequences and sensory illusions in the pitch axis.
List the monocular depth cues. (8)
Relative size Overlap/interposition Linear perspective Texture gradient Atmospheric perspective Shadowing Motion parallax Absolute/actual size
What are the side effects of antihistamines?
Drowsiness & dizziness
What is the purpose of the Eustachian tube?
It equalises the pressure between the middle ear and the external atmosphere.
What does Boyle’s Law demonstrate and what is it associated with?
Pressure is inversely proportional to volume.
Barotrauma
What does Henry’s Law demonstrate and what is it associated with?
The amount of dissolved gas in a liquid is proportional to its partial pressure.
Decompression sickness
What does Fick’s Law describe?
Diffusion
Associated with alveoli.
What is Dalton’s Law and what illness is it associated with?
The total pressure of the atmosphere is the sum of a the partial pressures of its constituent gases.
Hypoxia
