Spirometry update 2019: phase 4 forced maximal inspiration and new acceptability criteria

Key Points

• The introduction of forced maximal inspiration in spirometry improves the diagnostic accuracy of lung function tests.
• A new acceptability criterion based on the difference between FIVC and FVC ensures better quality checks.
• Methods for evaluating flow-volume curves have been extended to enhance the accuracy of spirometry results.
• These enhancements in spirometry procedures may lead to more reliable assessments in respiratory health.