What is the American Thoracic Society standard for accuracy when measuring flows during pulmonary function testing?
a. 90% accuracy or within 0.30 L/sec, whichever is greater
b. 95% accuracy or within 0.20 L/sec, whichever is greater
c. 97% accuracy or within 0.10 L/sec, whichever is greater
d. 99% accuracy or within 0.05 L/sec, whichever is greater
ANS: B
A diagnostic spirometer that measures flow should be at least 95% accurate (or within 0.2 L/sec, whichever is greater) over the entire 0 to 14 L/sec range of gas flow.
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3. The exchange of oxygen and carbon dioxide between the blood and the cells of the body is called:
A) internal respiration. B) external ventilation. C) external respiration. D) internal ventilation.
Which structure form the lower two-thirds of the nose?I. Lateral nasal cartilageII. Lesser and greater alar cartilagesIII. Septal cartilageIV. Fibrous fatty tissue ?
A. Lateral nasal cartilage B. Lesser and greater alar cartilages C. Septal cartilage D. Fibrous fatty tissue