Importance

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Abstract

A self-contained, portable system for measuring and computing respiratory parameters of a test subject undergoing forced expired breathing maneuvers according to instructions including a spirometer for receiving the exhaled breath of the subject for generating a measurement signal, a miniaturized digital computer for receiving the measurement signal, a visual display for presenting alpha-numeric characters under control of the computer to generate indicia representative of the computed parameter results, the computer further including a central processing unit and a voltage control oscillator interconnected between the central processing unit and the spirometer for receiving the measurement signal from the spirometer and converting the same to digital signals for averaging by the central processing unit to substantially eliminate random noise.

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First Claim