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Lung Function Tests

Forced Vital Capacity

February 15th, 2021


The forced vital capacity (FVC) is the maximal amount of air exhaled after a maximal inspiration.
    • Normal Range

    • 80 - 120% predicted
  • Interpretation

  • Normal FVC indicates normal lung elasticity, a normal chest wall and no respiratory muscle weakness.
  • Low FVC (<80% predicted) is suggestive of restrictive lung disease or poor expiratory effort.
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