3475796
Pregunta 1
Pregunta
All of the following are true except
Respuesta
-
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
Pregunta 2
Pregunta
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?
Respuesta
-
CO2 Production (VCO2) increases
-
Alveolar Ventilation increased
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PACO2 doesn't change
-
all of the above are correct
Pregunta 3
Pregunta
The amount of CO2 produced per minute is <= to the amount of oxygen consumed
Respuesta
- True
- False
Pregunta 4
Pregunta
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
Respuesta
- True
- False
Pregunta 5
Pregunta
Which of the following statement is false
Respuesta
-
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
Pregunta 6
Pregunta
When CO2 production doubles the alveolar ventilation doubles
Respuesta
- True
- False
Pregunta 7
Pregunta
The STPD volumes are about 20% smaller than BTPS. (because water vapor and increased temperature increase the volume of the gas)
Respuesta
- True
- False
Pregunta 8
Pregunta
Dalton's law of Partial pressures
Respuesta
-
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
-
All of the above are true
Pregunta 9
Pregunta
Regarding PO2
Respuesta
-
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
Pregunta 10
Pregunta
Regarding Dead space all of the following are true except?
Respuesta
-
Humidifies air
-
Warms inspired air
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removes particulate matter
-
gas exchange
Pregunta 11
Pregunta
Increase in Physiologic dead space
Respuesta
-
PaO2 decreased
-
PaCO2 increased
-
P expired CO2 decreased
-
P expired O2 increased
-
All of the above are correct
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