Zusammenfassung der Ressource
Frage 1
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All of the following are true except
Antworten
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Minute Ventilation = f(tidal volume)
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Alveolar Ventilation = f(tidal volume-dead space)
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dead space ventilation + alveolar ventilation = Tidal volume
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dead space = convert patient's weight in kgs to ml
Frage 2
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A 32 yr old male has been running on a treadmill for 15 min. What are the most likely changes in the values below compared to rest?
Antworten
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CO2 Production (VCO2) increases
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Alveolar Ventilation increased
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PACO2 doesn't change
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all of the above are correct
Frage 3
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The amount of CO2 produced per minute is <= to the amount of oxygen consumed
Frage 4
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RQ (Respiratory Quotient) = ratio of METABOLIC production of CO2 to O2 consumption Whereas Respiratory gas exchange ration R = CO2 production/O2 consumed at the lung
Frage 5
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Which of the following statement is false
Antworten
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Hyperventilation means that alveolar ventilation exceeds CO2 production
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Hypoventilation means that alveolar ventilation is less than CO2 production
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During exercise hyperventilation is normal
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all statements are true
Frage 6
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When CO2 production doubles the alveolar ventilation doubles
Frage 7
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The STPD volumes are about 20% smaller than BTPS. (because water vapor and increased temperature increase the volume of the gas)
Frage 8
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Dalton's law of Partial pressures
Antworten
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The total pressure of a mixed gas is the sum of the individual partial pressures of each gas
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in air FiO2 never changes but the barometric pressure does change based on the sea level
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PB = PO2 + PCO2 + Pwv + PN2
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PO2 at sea level = 160 mmHg
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All of the above are true
Frage 9
Antworten
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In ambient air is 160 mmHg
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In bronchioles it is 150 mmHg (because water vapor was added about 10 mmHg so that is subtracted
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Alveoli it is 100 mmHg because O2 is diffusing into the blood
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all of the above are true
Frage 10
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Regarding Dead space all of the following are true except?
Frage 11
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Increase in Physiologic dead space