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CCT Flight phys
General flight physiology Question
| Question | Answer |
|---|---|
| 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
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