A member asked:

What does it mean to have a vital capacity reading at 2.0 l or 2000ml , irv at 1100ml, and erv at 500ml?

2 doctors weighed in across 2 answers

See below: Vital capacity is the volume of air you can move with maximum inspiration and expiration; irv (inspiratory reserve capacity) is what you can do with maximum inspiration but don't usually do with regular breathing, similar for erv (expiratory reserve capacity) for expiration. These numbers look pretty normal.

Answered 9/28/2016

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Dr. Klaus d Lessnau answered

Specializes in Pulmonary Critical Care

Missing: There are many missing numbers. More information is needed to provide a useful answer.

Answered 11/9/2012

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