Download Critical Care Paramedic - Flight Physiology2024/2025 Detailed Questions And Expert Answers and more Exams Nursing in PDF only on Docsity!
Critical Care Paramedic - Flight Physiology
What are the primary gases/percentages in the atmosphere? - ANS>Nitrogen - 78% Oxygen - 21% Other gases - 1% These percentages do not change. What are the layers of the atmosphere? - ANS>Troposphere - sea level to 26,405 feet Tropopause Stratoshpere Stratopause Mesosphere Thermoshere Exosphere What are the 3 physiologic zones of the atmosphere? - ANS>Physiological zone - sea level to 10,000 feet Physiologically Deficient Zone - 10,000 feet - 50,000 feet Space Equivalent Zone - 50,000 feet - 120 miles
What law requires pilots to use oxygen when flying at altitudes above 10,000 feet? - ANS>Federal Aviation Requirements (FAR) Part 135. What is the barometric pressure at sea level? - ANS>760 mmHg What is one physiologic symptom that can be affected at altitudes above 5,000 feet can affect? - ANS>Night vision What are the 3 distinct parts of flight? - ANS>1) Aircraft
- Flight crew
- Atmosphere What is the the weight per unit area of all of the molecules of the gas above the point at which the measurement was taken, with temperature and humidity as variables called? Also called "atmospheric pressure." - ANS>Barometric Pressure What gas law states that when volume of gas increases, pressure decreases; when volume of gas decreases, pressure increases? Ex: Air trapped in pneumothorax will expand with increase in altitude due to decrease in atmospheric pressure. Barotitis media, barodontalgia, barosinusitis, etc. This is an ASCENT problem. - ANS>Boyle's Law - "Boil Very Prudently"
alveoli, and increased membrane thickness from COPD with exudate from the pneumonia - ANS>Fick's Law What gas law states that as pressure of a gas over a liquid decreases, amount of gas dissolved in liquid will also decrease? Gas molecules can be dissolved in a liquid and remain in it as long as liquid is in a pressurized, closed container. Carbonated beverages, decompression sickness. - ANS>Henry's Law What gas law states that a correlation exists between pressure and temperature when volume is constant? Decrease container, increase pressure & temperature Increase container, decrease pressure & temperature - ANS>Gay- Lussac's Law What gas law states that the rate at which gas moves through a small hole, avoiding interaction with other particles, is related inversely to square root of the mass of 1 mole of its molecules? - ANS>Graham's Law What are the 4 TYPES of hypoxia? - ANS>1) Hypoxic hypoxia
- Histotoxic hypoxia
- Stagnant hypoxia
- Hypemic hypoxia What type of hypoxia is caused by a inadequate ventilation or reduction in PO2? Characterized by lack of oxygen entering blood In air environment, result of reduced atmospheric pressure causing reduced alveolar PaO Symptoms only begin to manifest at heights above 5,000'. - ANS>Hypoxic hypoxia What type of hypoxia is caused by a cell's inability to use oxygen adequately? Ex: Cyanide poisoning - ANS>Histotoxic hypoxia What type of hypoxia is caused by a failure of the circulatory system to transport oxygenated blood? Ex: Cardiogenic Shock - ANS>Stagnant hypoxia What type of hypoxia is caused by a reduction in the ability of blood to carry oxygen to tissues, despite oxygen's abundance. Also called Anemic hypoxia. Ex: Carbon monoxide poisoning, anemia, hemorrhage. - ANS>Hypemic hypoxia
- Impaired vision, hearing, and touch
- Mental confusion
- Poor coordination
- Aggression, Euphoria, Irritability, Overconfidence, Depression Critical Stage - ANS>- Occurs at 20,000 feet or above
- Mental confusion
- Incapacitation
- Death if not corrected The most frequently used method for pressurizing aircraft. Designed to maintain pressures at 5,000-8,000 feet with which no supplemental oxygen is needed. - ANS>Isobaric Control System Tactical Military Aircraft use this system for cabin pressure regulation in aircrafts. Does NOT maintain a constant cabin altitude. It is designed to ensure that the cabin pressure does not exceed the outside pressure by a predetermined amount. Supplemental oxygen and pressurized suits must be available at certain altitudes. - ANS>Differential Control Method
What are the stressors or flight? - ANS>- Decreased levels of PO
- Barometric pressure changes
- Thermal changes
- Vibration
- Decreased humidity
- Noise
- Fatigue
- Gravitational Forces
- Spatial disorientation
- Third spacing
- Flicker vertigo
- Fuel vapors
- Weather
- Night flying What are the factors that affect the tolerance of the stressors of flight? - ANS>- Illness
- Medications
- Stress
- Alcohol
- Fatigue
