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CCT Flight phys

General flight physiology Question

How much nitrogen and oxygen is composed of the dry atmosphere? Nitrogen= 78.03% Oxygen= 20.95%
How high is the thermosphere? 372 miles
How high is the Mesosphere? 53 miles
How high is the stratosphere? 31 miles
How high does the troposphere go? from Sea level to 31 miles
A column of air exerts a force is called Barometric pressure
The physiologic zone height range is? Sea level to 10,000ft
The physiologically deficient zone height range is? 10,000ft-50,000ft
What is the most noticeable impairment in the physiologically deficient zone? Hypoxia
What is the height zone of the space equivalent zone? 50,000ft-250,000ft
What gases are of concern to aviation medicine? oxygen, carbon dioxide, nitrogen, water
What are the eight primary Stressors? hypoxia, barometric pressure changes, thermal variations, decreased humidity, fatigue, noise, vibration, gravitational forces
What are the 4 stages of hypoxia? 1st-indifferent sstage, 2nd-compensatory stage 3rd- disturbance stage 4th-critical stage
What are the 4 types of hypoxia? hypoxic, anemic, histotoxic, stagnant
inadequate oxygenation secondary to reduced partial pressure of oxygen in inspired air is which form of hypoxia? hypoxic hypoxia
inadequate tissue oxygenation secondary to reduced oxygen-carrying capacity is which form of hypoxia? Anemic hypoxia
inadequate tissue oxygenation secondary to blood pooling if which form of hypoxia? Stagnant hypoxia
inadequate tissue oxygenation secondary to a metabolic disorder or poisoning of the cytochrome oxidase enzyme system resulting in cellular inability to utilize oxygen in which of the forms of hypoxia? Histotoxic hypoxia
What are some causes of Hypoxic Hypoxia? impaired ventalatiokn, reduced PO2, and impaired gas exchange along the aveolar-capillary membrane
What are some causes of anemic hypoxia? CO poisoning, COPD, pneumonia, pulmonary edema, PE, alcohol abuse
What are some causes of stagnant hypoxia? Heart failure, shock, gravity, PPV, PE
What is the effective performance time time(EFP)? the amount of time a crew member is able to preform useful flight duties in a environment of inadequacy of oxygen.
What is the time of useful consciousness? time from exposure to an oxygen-deficient environment to the point at which a useful level of consciousness is lost.
At what altitude will PPV with 100% O2 be required? 40,000ft
What is Barotitis Media? during accent air int he middle ear vents passively into the throat when a difference of 12-15mmhg exist.
What is barosinusitis? Blockage if are in the nasal cavity.
In barosinusitis where does the pain usually radiate to? the jaw, and possible toothache misconception
What is barotalgia? toothache during flight.
When does pain usually occur with barotalgia? during accent between 5,000-15,000ft
Pressure simulating 5,000-8,00ft on a fixed wing flight flying above 10,000ft is called what? Cabin Pressure.
What are some advantages of cabin pressure? reduced GI gas trapped pain, needs for O2, temp and humidity is easily controlled, crew can move without O2 mask, protects middle ear passages.
What problems can thermal variations cause? fatigue, stress, motion sickness, under-dressing or overdressing.
What medication can interfere with thermal homeostasis? Sedatives, Analgesics, Neuromuscular-blocking agents, Psychotropic medications.
In pressurized cabins with decreased humidity what is there a risk of? Dehydration.
The acronym DEATH for stressors stands for what? Drugs, Exhaustion, Alcohol, Tobacco, Hypoglycemia.
When is the fetus most susceptible to high frequency noise increasing risk of birth defects? 14-60 days after conception.
What are some advantages of a fixed-wing aircraft? cabins are well insulated, engines placed away from crew, often does not require ear protection, loudest upon take-off.
What are some disadvantages of a rotor-wing aircraft? constant high noise environment, engine above crew, communication reduced, requires ear protection.
What are some effects of virbration? increased metabolic rate, increased CO2 production, decreased vision and fine motor control,
If your patient is becoming restless and agitated in flight you should consider? Hypoxia
Created by: AMFK07