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lung capacity
My lung doctor told me that my lung capacity was at 46%. What does that exactly mean?
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Hello and hope you are doing well.

Lung capacities refer to the volume of air associated with different phases of the respiratory cycle. This is measured from the lung volumes. The commonly measured values are FEV1 and FVC. The normal spirometry values are FVC-80-120% and FEV-80-120%. The FEV1/FVC ratio of about 80% is normal. Lower values could indicate an obstructive lung disease like COPD.

Hope this helped and do keep us posted.
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