Question

What lung values changed (from those of the normal patient) in the spirogram when the patient with emphysema was selected?

Answer 1

The lung values that changed include the following: ERV < IRV < RV < FVC < FEV1%. Spirogram is used to measure pulmonary function test. It is a test that tests the efficiency of the lungs to exchange carbon dioxide and oxygen gases. The vital capacity of the lung is equal to TV +IRV + ERV and the total capacity is equal to the summation of TV, IRV, ERV and RV.

Answer 2

When the patient with emphysema was selected lung values changed (from those of the normal patient) in the spirogram are:

ERV, IRV, RV, FVC, FEV1, FEV1 %

The reason behind the changes of these values are due to the loss or inability of electric recoil. A spirogram (graph like structure obtained by the respiratory movements) is measured by spirometer.