A 73 year-old obese female with a chronic productive cough; which pulmonary function test value would be decreased?

Enhance your readiness for the Physician Assistant Clinical Knowledge Rating and Assessment Tool (PACKRAT) 4 Exam. Utilize our flashcards and multiple-choice questions, complete with hints and explanations, to ace your upcoming test!

Multiple Choice

A 73 year-old obese female with a chronic productive cough; which pulmonary function test value would be decreased?

Explanation:
Airflow limitation from obstruction reduces how much air you can exhale in the first second relative to the total exhaled volume. This makes the FEV1 drop disproportionately compared with FVC, so the FEV1/FVC ratio decreases. In an elderly patient with a chronic productive cough, COPD or chronic bronchitis fits as an obstructive pattern, which explains a lower FEV1/FVC ratio. Tidal volume is not specifically decreased by obstruction, while residual volume and total lung capacity are often increased due to air trapping and hyperinflation, not decreased.

Airflow limitation from obstruction reduces how much air you can exhale in the first second relative to the total exhaled volume. This makes the FEV1 drop disproportionately compared with FVC, so the FEV1/FVC ratio decreases. In an elderly patient with a chronic productive cough, COPD or chronic bronchitis fits as an obstructive pattern, which explains a lower FEV1/FVC ratio. Tidal volume is not specifically decreased by obstruction, while residual volume and total lung capacity are often increased due to air trapping and hyperinflation, not decreased.

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