PFT STUDY GUIDE QUESTIONS WITH COMPLETE ANSWERS

The MVV test requires the pt. to breathe as rapidly and deeply for


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12 to 15 seconds




Respiratory Quotient (RQ)

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ratio of carbon dioxide produced to oxygen consumed




What level of VC is associated with increased risk of postoperative respiratory
complications?


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<20 ml/kg
(reduced VC)




The volumes measured during a PFT are measured at


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ATPS




What is the MVV test used for?


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Pre-op; to evaluate whether the pt. may have postoperative complications.

- this test is a good measure of pt. motivation and ability to move air.

, Lung volumes and flow rates are affected typically when the BMI is greater than:


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BMI>30

as a person gains weight, lung volumes and flow rates do not changes until
the person becomes obese (BMI>30)




The MVV reflects


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- airway resistance
- condition of respiratory muscles
- compliance of the lungs and thorax




What level of VC is associated with increased risk of respiratory failure?


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<15 ml/kg

indicates that the ventilatory reserve is decreased enough to cause resp.
failure




Methacholine