Forced Vital Capacity (FVC)
- Sample Type
- Standard
- Fasting
- No
- Unit
- Liters
FVC is the total amount of air that can be forcibly exhaled from the lungs after taking the deepest breath possible. It is a cornerstone of Pulmonary Function Testing (PFT) used to identify restrictive lung diseases and to assess the severity of obstructive diseases when combined with FEV1.
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Check Your Result
Enter your lab result to see where you stand compared to the standard reference range.
Why Context Matters
FVC is highly effort-dependent. If the patient does not exhale fully or has poor technique, the results will be falsely low. It also requires accurate demographic data (age, height, ethnicity) to calculate the 'predicted' value correctly.
Lab ranges are statistical averages, not biological laws. "Normal" for a 20-year-old male isn't normal for a 60-year-old female.
Clinical References
Source-of-truth databases and clinical guidelines for Forced Vital Capacity (FVC):
Official Sources
- GOLD 2024: a brief overview of key changes - PMCpmc.ncbi.nlm.nih.gov
- Restrictive Lung Disease - StatPearls - NCBI Bookshelfncbi.nlm.nih.gov
Research & Guidelines
Related Indicators
Medically Reviewed by Dr. Binoy Babu, MBBS
Board Certified Doctor • 10+ Years Clinical Experience
Dr. Babu is a practicing physician dedicated to empowering patients with clear, actionable medical information. He founded 2opi to bridge the gap between complex lab reports and patient understanding, ensuring everyone has access to a reliable second opinion.
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