MANUAL PHYSIOLOGY PRACTICAL - Repository:The Medical ...
MANUAL PHYSIOLOGY PRACTICAL - Repository:The Medical ...
MANUAL PHYSIOLOGY PRACTICAL - Repository:The Medical ...
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FM/UOJ<br />
Experiment R2<br />
MEASUREMENT OF LUNG VOLUMES<br />
Measuring the volume of the lung is difficult because it is an elastic organ which<br />
contains air. <strong>The</strong> amount of air in the lung varies depending on the state of respiration.<br />
<strong>The</strong>refore the volume should be measured under defined conditions. Another reason for<br />
the difficulty in measuring the volume is it irregular internal structure. <strong>The</strong> volume can be<br />
measured either by dilution of non-absorbable gases or by measuring the air expelled<br />
from the lung. <strong>The</strong> first method cannot be employed in our lab. <strong>The</strong> second method is<br />
spirometry. Since all air in the lung cannot be expelled out, this method is inappropriate<br />
to measure the absolute volume of the lung. Changes in the lung volume, however, can be<br />
measured which is very useful in assessing lung function. Lung volumes can also be<br />
predicated from measurements of height and age fairly accurately.<br />
Exercise:<br />
Define:<br />
a. Tidal volume<br />
…………………………………………………………………………………<br />
………………………………………………………………………………..<br />
b. Expiratory reserve volume<br />
…………………………………………………………………………………<br />
…………………………………………………………………………………<br />
c. Inspiratory reserve volume<br />
…………………………………………………………………………………<br />
…………………………………………………………………………………<br />
d. Vital capacity<br />
…………………………………………………………………………………<br />
…………………………………………………………………………………<br />
e. Forced vital capacity<br />
…………………………………………………………………………………<br />
…………………………………………………………………………………<br />
…………………………………………………………………………………<br />
f. Force expiratory volume in the first second<br />
…………………………………………………………………………………<br />
…………………………………………………………………………………<br />
…………………………………………………………………………………<br />
Respiration<br />
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