What does a lung capacity of 39 percent mean?

Answer 1

The lung capacities are measurements of two or more volumes. The vital capacity (VC) measures the maximum amount of air that can be inhaled or exhaled during a respiratory cycle. It is the sum of the expiratory reserve volume, tidal volume, and inspiratory reserve volume. The inspiratory capacity (IC) is the amount of air that can be inhaled after the end of a normal expiration. It is, therefore, the sum of the tidal volume and inspiratory reserve volume. The functional residual capacity (FRC) includes the expiratory reserve volume and the residual volume. The FRC measures the amount of additional air that can be exhaled after a normal exhalation. The total lung capacity (TLC) is a measurement of the total amount of air that the lung can hold. It is the sum of the residual volume, expiratory reserve volume, tidal volume, and inspiratory reserve volume

Answer 2

First, be mindful that the internet is not a replacement for doctor's guidance and information; I am not a physician.

Lung capacity is the amount the lungs can expand during respiration. Certain lung diseases (acute like pneumonia or chronic such as emphysema) can decrease the lung capacity or lung volume. Some chronic diseases make the lung tissue 'stiffen' so that it doesn't expand as well, but most diseases affect the ability of the lungs to inhale oxygen, exhale carbon dioxide, and to work properly under stress or exercise.

A normal lung capacity in a perfectly healthy person is 99-100%. The percent can drop some but still be adequate (for example, 95% is still acceptable).

As the lung capacity drops, the body can adjust some, but typically the person needs supplemental oxygen to assist in delivering oxygen into the body. However, if the lung tissue or aveloi (part of the lung structures) are damaged, then the supplemental O2 may not be enough to keep the person alive. As the condition worsens, the person may cough a lot, be extremely short of breath, feel very fatigued, and unable to ward off respiratory infections.

Answer 3

what does it mean if you use only 50% lung capacity

Answer 4

what is life expectancy of a person with 36% lung usage>

Answer 5

It is way too low for a person to get enough oxygen. It should be about 97%