A 58-year-old former smoker reports progressive exertional dyspnea, chronic productive cough for two winters, and wheeze unrelieved by a borrowed albuterol inhaler, with prolonged expiration and distant breath sounds on exam. Which evaluation approach best establishes a new diagnosis of chronic lung disease?

Progressive exertional dyspnea with two winters of productive cough in a 58-year-old former smoker with albuterol-unresponsive wheeze, prolonged expiration and distant breath sounds favors new COPD with chronic bronchitis and fixed airflow limitation, so comprehensive evaluation is required with detailed exposure history to quantify smoking plus occupational and biomass risk, spirometry with bronchodilator to document persistent obstructive FEV1/FVC reduction and reversibility, imaging to assess hyperinflation and exclude bronchiectasis, interstitial disease or malignancy, and one-time alpha-1 testing as recommended for all persistent obstructive disease to guide counseling and family screening. The history plus bronchodilator spirometry plus imaging approach without alpha-1 testing fails by omitting guideline-directed etiologic workup that cannot be excluded by age or smoking history. The history plus bronchodilator spirometry plus alpha-1 approach without imaging fails by omitting anatomic baseline needed to exclude mimics and complications in a new diagnosis. The history plus baseline spirometry plus imaging plus alpha-1 approach without bronchodilator testing fails by omitting standardized reversibility assessment, since informal albuterol failure does not distinguish fixed obstruction from asthma variability. Exam caveat: chronic cough duration alone never confirms COPD without post-bronchodilator obstruction. Practical check: confirm pack-years, spirometry quality and loops, imaging read, alpha-1 result, vaccination and inhaler education documented.