Design and Development of Spiro meter for Classic Pulmonary Function Test

With the increase in growth of industry and the automobile sector, there is a simultaneous growth in the pollution. The increase in pollution causes various respiratory problems like Asthma, emphysema, pulmonary fibrosis, air flutter etc which directly links with the effect to Lungs.

To diagnose the effect of pollution on the respiratory system there have been various techniques namely Bronchitis test, pulmonary test, peak rate, Spiromtery etc.

But to diagnose the effect on lungs the only test known is Spiromtery test. In industrial sector there is the constant need to assess the condition of lungs of workers. Hence, Spirometer is the only option available for
achieving the task for the constant monitoring with effect of the time factor taken into consideration.

A spirometer is an apparatus for measuring the volume of air inspired and expired by the lungs. It is a precision differential pressure transducer for the measurements of respiration flow rates. The spirometer records the amount of air and the rate of air that is breathed in and out over a specified time.

Spiromtery directly helps in the measurement of the tidal volume, vital capacity, inspiratory capacity and expiratory reserve volume. The results of the ratio FEV1/FVC can be used to distinguish between restrictive and obstructive pulmonary diseases


Classification of spirometer is of following types:

I. According to their purpose: Diagnostic and Monitoring
II. According to the technologies: Volumetric and Flow measuring

As in industrial sector we need to monitor the functioning of lungs the spirometer is designed with its interfacing with PC to get more precise results than the earlier spirometer available. The latest mini spirometer available is too costly for monitoring purpose. There of this spirometer is being developed.

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