Pulmonary Function Test Interpretation

The video discusses pulmonary function test interpretation, comparing individual results with reference values from healthy populations. Traditional methods, based on FEV1, FVC, and lung volumes, lack statistical validation. New guidelines recommend using NHANES reference equations, considering results abnormal if below the 5th percentile. The video explains obstructive and restrictive patterns, and the GOLD classification for COPD severity. It concludes with course information.

What is the basis for traditional pulmonary function test interpretation?

• Doctor's experience

• Statistical validation

• Values for FEV1, FVC, and lung volumes greater than 80% predicted

• Patient's symptoms

Which survey's reference equations are recommended in the United States for pulmonary function tests?

• American Lung Association Survey

• Global Health Survey

• National Health and Nutrition Survey 3

• World Health Organization Survey

What characterizes an obstructive pattern in pulmonary function tests?

• Normal lung volumes

• Increased gas transfer

• Reduced airflow rates and reduced FEV1 to vital capacity ratio

• Increased lung volumes and preserved FEV1/FVC ratio

What indicates a restrictive pattern in pulmonary function tests?

• Increased gas transfer

• Elevated lung volumes

• Increased airflow rates

• Reduced vital capacity and preserved FEV1/FVC ratio

Which pattern is characterized by reduced lung or chest wall expansion?

• Mixed pattern

• Normal pattern

• Restrictive pattern

• Obstructive pattern

What FEV1/FVC ratio suggests airway obstruction using the traditional method?

• Greater than 80%

• Less than 50%

• Less than 70%

• Equal to 70%

What FEV1 percentage is considered 'mild disease' in the GOLD classification for COPD?

• Less than 30% predicted

• 30% to 50% predicted

• 50% to 80% predicted

• Greater than 80% predicted

In the GOLD classification, what FEV1 percentage range defines 'moderate obstructive disease'?

• 50% to 80% predicted

• Less than 30% predicted

• 30% to 50% predicted

• Greater than 80% predicted

What is the FEV1 percentage for 'severe obstruction' in the GOLD classification?

• Less than 30% predicted

• 30% to 50% predicted

• 50% to 80% predicted

• Greater than 80% predicted

What is the FEV1 percentage for 'very severe obstruction' in the GOLD classification?

• Less than 30% predicted

• 30% to 50% predicted

• 50% to 80% predicted

• Greater than 80% predicted