Quest AsthmaMD BreatheWell Lung Performance Peak Flow Meter

The Quest AsthmaMD BreatheWell represents a strategic integration of reliable mechanical sensing with modern digital data management. Classified as a Class II medical device under 21 CFR 868.1860, this handheld monitor is engineered for the domiciliary assessment of Peak Expiratory Flow (PEF). Our evaluation confirms that while the device itself is a purely mechanical, spring-loaded piston system, its primary innovation lies in its pairing with a robust, physician-developed smartphone application. The meter features easy-to-read graduations and adjustable three-zone markers that allow users to delineate green, yellow, and red zones based on their personal best values. Technical specifications highlight its portability and durability, with dimensions of 6 x 2.25 x 1.5 inches. Clinical feedback indicates the device is among the most accurate in the mechanical class, specifically designed to capture the high-velocity 'fast blast' of air required for objective lung function measurement. The AsthmaMD app facilitates better adherence by replacing paper journals with automated trending and reporting features, though it requires users to manually input the values read from the physical device.