Topics: Respiratory physiology, Lung, Lung volumes Pages: 3 (750 words) Published: April 10, 2013

Aim: To use a spirometer to investigate the effects of exercise on lung volume. Spirometer
Spirometry is the most basic and frequently performed test of pulmonary (lung) function. A device called a spirometer is used to measure how much air the lungs can hold and how well the respiratory system is able to move air into and out of the lungs. A spirometry test is done with a spirometer, which consists of a mouthpiece and disposable tubing connected to a machine that records the results and displays them on a graph. To perform spirometry, a person inhales deeply, closes the mouth tightly around the tube and then exhales through the tubing while measurements are taken. Some test measurements are obtained by normal breathing, and other tests require rapid and forceful inhalation and/or exhalation. The volume of air inhaled or exhaled, and the length of time each breath takes is recorded and analyzed.

Spirometer Reading

Tidal Volume (TV) - is the amount of air that is inhaled or exhaled with each breath under resting conditions. Inspiratory Reserve Volume (IRV) – amount of air that can be forcibly inhaled beyond a tidal inspiration Expiratory Reserve Volume (ERV) – amount of air that can be forcibly exhaled beyond a tidal expiration. Residual Volume (RV) – amount of air remaining in the lungs after an ERV. Vital Capacity – TV+IRV+ERV.

Total Lung Capacity – RV+VC.

1.The cd programme was opened on the computer and book was used for instructions. 2.Exercise 7 was opened.
3.The comparative spirometry experiment was selected.
4.First, the patients type was selected. Next there breathing pattern was selected. 5.The first patient type to be selected was normal and then breathing pattern unforced was also selected. The start button was clicked and this produced start of the graph. 6.Once stopped, the breathing pattern was changed to forced vital capacity and the start button was clicked again. This produced the end...
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