The USB COPD screener is a valuable device that serves as a screener prior to spirometry. The USB COPD screens out those who have normal FEV1's, therefore those who do not have COPD, without the risk of false COPD negatives. This capability allows spirometry resources to be focused on the highest risk patients. This device measures FEV1, FEV6, ratio, lung age, for GOLD COPD assessment. Accepts input of age, gender, height, and race and calculates predicted value and percentage predicted. The USB feature adds the capability of computerized COPD stage screening reports via included Vitalograph Reports software.