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CFRN New /609 Questions And Answers Download To Pass!!!
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CFRN New 2023 -2024 /609 Questions And AnswersDownload To Pass!!!
Quiz :What is atmospheric pressure at sea level? - Answer :760mmHg (or 760
torr)
Quiz :T/F: Atmospheric pressure and barometric pressure are essentially the
same thing, just using a different unit of measure. - Answer :True (think
measuring same item in inches and then measuring it in cm)
Quiz :How many atmospheres (or ATMs) are at sea level? - Answer :1
atmosphere/ATM at sea level
Quiz :What is barometric pressure? - Answer :The combined weight of all
atmospheric gases creating a force upon the surface of the earth.
Quiz :What is barometric pressure at sea level? - Answer :29.92Hg
Quiz :According to Boyle's law, as altitude increases, barometric pressure
____, and gas in an enclosed space ____ as long as temperature remains ____.
- Answer :decreases, expands, constant
Quiz :T/F: As altitude increases, the measurement of Atmospheres (ATMs) also
increases. - Answer :False - decreases
Quiz :Quick math for calculating drop in ATMs until appx 5000/6000 feet
altitude is that for every ____ increase in altitude, ATM goes down 5%. -
Answer :1500 feet
Quiz :What do the values of P1V1=P2V2 for Boyles law mean? - Answer :P1 =
starting ATM at the lowest altitude
V1 = starting volume (ETT cuff, epigastrum, etc.)
P2 = highest ATM based on highest altitude
V2 = ending volume as impacted by highest altitude
*constant temperature*
Quiz :Due to Boyle's law, what type of physiologic process/pain may you
experience on descent? - Answer :barotitus media - can't equalize ears (for
test: only clinical issue that occurs on descent, sinusitis ascent)
,Quiz :In barobariatrauma, according to boyles law, as altitude increases and
atmospheric pressure drops - the drop causes ____ to be displaced off of
phospholipids and ____ narcosis can occur. - Answer :nitrogen, nitrogen
Quiz :T/F: Barobariatrauma acts like a decompression sickness, such as a scuba
diver who rapidly ascends. - Answer :True (would also be seen on ascent
phase of flight)
Quiz :Barobariatrauma is more common in what type of population of
patients? - Answer :morbidly obese
Quiz :How is nitrogen narcosis from barobariatrauma treated? - Answer :High
flow O2 (preferably appx 15 minutes before flight if concerned this may
present - morbidly obese, significant altitude changes)
Quiz :Barodentalgia (think boyles law) occurs in which phase of flight? -
Answer :ascent
Quiz :According to Charles's law, if pressure is constant, what is the
relationship of volume and temperature? - Answer :directly proportional
(temp up = volume up, temp down = volume down) (*think car tires*)
Quiz :For every 1000' increase in altitude, how much will the temperature
decrease? - Answer :2 degrees celsius (if in meters - 150 meters ascent = 1
degree celsius temp decrease)
Quiz :Which gas law states the following: At a given mass and constant volume
of gas, the pressure exerted on the sides of its container is directly
proportional to its absolutely temperature. - Answer :Gay-Lusaac's law
Quiz :How many gases make up atmospheric air? - Answer :5 (nitrogen being
the most, oxygen second)
Quiz :What gas law states the sum of the partial pressure in a mixture of gases
will equal the total pressure? - Answer :Dalton's law
Quiz :A mix of Dalton's and Boyle's law concepts would conclude that as
altitude ______, atmospheric pressure decreases. Even though the pressure
changes, the gas stays at the ____ proportions. Therefore, if increasing
,altitude, the partial pressure of oxygen (amount available in atmosphere) will
___. - Answer :increases, same, decrease
Quiz :How do you calculate a partial pressure of oxygen? - Answer :Oxygen in
mmHg x oxygen concentration
Ex: 760mmHg (sea level) x 0.21 (normal O2 % in air) = 159.6mmHg (partial
pressure aka available amount of oxygen in atmosphere)
Quiz :Normal paO2 on ABG? - Answer :80-100 (partial pressure of oxygen or
amount of oxygen measured/available in arterial blood)
Quiz :What gas law states that the amount of gas dissolved in a solution is
directly proportional to the pressure of the gas on the surface of the solution? -
Answer :Henry's law
(think if you turn up FiO2 and there is more partial pressure of oxygen, more
will be dissolved Into the solution - or think pop can, CO2 under pressure in can
escapes proportionately when can is opened and pressure released)
Quiz :When the alveoli are perfused with blood as normal, but
ventilation/oxygenation fails to supply the perfused region - Answer :Shunting
(may often be caused by some sort of blockage - PE, infectious process/fluid)
Quiz :One potential way to optimize gas exchange is to increase surface area
of alveoli by adding ____. - Answer :PEEP
Quiz :What is Graham's gas law? - Answer :Gases diffuse from a region of
higher concentration (pressure) to lower concentration (pressure) until
equilibrium is reached.
Quiz :A patient is at sea level (760 mmHg) and is on 30% O2 (FiO2 of 0.3).
What is their partial pressure of oxygen at this altitude? - Answer :228 (760 x
0.3)
Quiz :Flicker Vertigo is primarily caused by what? - Answer :Sunlight passing
through the rotors (lower spinning 5-20Hz - can cause vertigo and seizure
activity)
Quiz :For every decrease below sea level (going below water) of ___ feet is
equal to additional ATM - Answer :33
(ex: 99 feet below water is 4 ATMs - using 1 ATM as your "zero")
, Quiz :Quick way to estimate patients PaO2 using FiO2? - Answer :FiO2 x 5
Quiz :Bedside calculation to estimate PaO2? - Answer :(700 torr x FiO2) - 50
ex: (700 x .5) - 50. (*700 = estimated atmospheric pressure, .5 for FiO2 of 50%)
Quiz :You compare your bedside calculation estimate of PaO2 to an actual
ABG and notice a large disparity, what physiological process is likely occuring? -
Answer :Shunt physiology (alveoli are perfused with blood as normal, but
ventilation/oxygenation fails to supply the perfused region)
Quiz :What does the DEATH acronym stand for in regards to stressors of
flight? - Answer :Drugs, Exhaustion, Alcohol, Tobacco, Hypoglycemia
Quiz :A period of time from the onset of a decompression until a person is
unable to effectively or adequately perform duties due to an insufficient supply
of oxygen. - Answer :Time of useful consciousness
Quiz :T/F: In an explosive decompression above 40,000 feet time of useful
consciousness will be less than 10 seconds. - Answer :True (*test tip pick
shortest amount of time answer*)
Quiz :T/F: The altimeter setting is your barometric pressure. - Answer :True
Quiz :Desired FiO2 based on altitude formula? - Answer :(FiO2 x P1) / P2
*P1 is current barometric pressure
*P2 is barometric pressure at highest flight altitude
(to maintain same level of oxygen therapy at a higher altitude)
Quiz :PaO2 will decrease by ____________ mmHg for every _____________
feet increase in altitude. - Answer :5/1000
Quiz :If the atmospheric pressure at 18,000 ft. MSL is 380 torr, what would the
partial pressure of oxygen at that altitude? - Answer :79 torr (380 x 0.21)
Quiz :A patient suffering from decompression sickness is an example of which
gas law? - Answer :Henry's
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