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Spirometers, Peak Flow Meters, and Lung Function


A spirometer is a device that is used to test lung function by measuring air inhalation and exhalation. This kind of testing is invaluable in, among other things, disease screening, health examinations, and epidemiological investigation.

The three most common tests in spirometry (mentioned above) are the FVC test, the VC test, and the MVV test. Looking first at FVC, this test focuses on forced exhalation and inhalation and measures the changes in the volume and flow of breath under these conditions. This is one of the most important measures in distinguishing between conditions of the lungs. VC testing then measures these changes in a relaxed state i.e. the subject need not force either inhalation or exhalation, but rather try and breathe normally. The aim of this testing is to reflect the potential capacity of the respiratory function. Lastly, MVV testing is a load test that measures the amount of ventilation obtained by repeating maximum voluntary effort to breathe as fast and as deep as possible per unit time. The end MVV value is related to the strength of the respiratory muscles, the elasticity of the chest, the elasticity of lung tissues as well as airway resistance.

A spirometer is used to diagnose COPD, asthma, restrictive lung diseases (such as pulmonary fibrosis), and many other diseases and conditions that affect lung function.




If you would like to know more about the our range of spirometers and peak flow meters , please contact the SA Healthcare sales team on 021 555 4328 or learn more them from the website www.sahcare.co.za !

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