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What conclusions can be drawn from the following data for a 45-year-old man who reports “occasional smoking” but has no other history of pulmonary problems?   ACTUAL PRED % PRED   ACTUAL PRED % PRED TLC 4.75 4.90 97% FVC 2.96 3.63 82% FRC 2.31 2.21 105% %FEV1 82% 78%   RV 1.28 1.20 106% FEF200-1200 4.33 5.45 79% VC 3.48 3.63 96% FEF25%-75% 1.95 3.37 58%

Using the bronchodilator response (BDR) measurement, which of the following percentage changes in FEV1 from pre- to post-bronchodilator testing indicates significant improvement?

For quality control, pulmonary function spirometer standards should be checked every shift.

Under the new PFT guidelines, what is the minimum percentage change in FEV1 after bronchodilator administration that indicates reversible airway obstruction?

Which condition causes residual volume (RV) and functional residual capacity (FRC) to increase?  

Which gas is typically used to measure lung diffusing capacity?

Using the traditional PFT interpretation algorithm, what conclusions can be drawn from the following data for a 36-year-old woman weighing 55 kg who was admitted for elective surgery?   ACTUAL PRED %PRED   ACTUAL PRED %PRED TLC 4.93 5.27 94% FVC 3.67 3.86 95% FRC 2.41 2.43 99% %FEV1 84% 78%   RV 1.29 1.35 96% FEF200–1200 5.66 5.74 99% VC 3.64 3.86 94% FEF25%–75% 3.53 3.49 101%

What is capillarity?

Roughly what is the mass of one cubic meter of air at sea level?

You dive one meter below the surface of a small backyard pool, then one meter below the surface of a large lake. How do the pressures on your ears compare?