QUESTION: 33

A patient has normal pulmonary and cardiac function. Which of the following is most likely when the patient reaches the anaerobic threshold during incremental stress testing?

Increased RER
Decreased CO2production
Increased VDA/VTratio
Decreased VE

Answer(s): C

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QUESTION: 34

A pulmonary function laboratory routinely tests five subjects as biologic controls. Acceptable instrument performance over time is indicated when measurements

For each individual are within 2 standard deviations of the mean of previous measurements for each individual.
For an individual are within 2 standard deviations of the mean of those for the group.
Of the group as a whole agree with those predicted by linear regression for changes in age.
Are within the 95% confidence interval predicted for an individual being tested.

Answer(s): D

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QUESTION: 35

At maximum exercise, a 24-year-old patient's heart rate is 150/min with a VO2of 750 mUmin. The calculated 02 pulse is most consistent with which of the following?

cystic fibrosis
cardiomyopathy
achievement of anaerobic threshold
deconditioning

Answer(s): A

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QUESTION: 36

In which of the following patients would an end-tidal CO2most likely produce values that are inconsistent with PaCO2?

50 year old with mild scleroderma
42 year old with moderate COPD
20 year old who smokes cigarettes
12 year old with kyphoscoliosis

Answer(s): B

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