Test Findings

Reduced Forced Vital Capacity



  • 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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