Utility of a portable hand-held forced expiratory volume in 1 second meter for monitoring asthma in an inner-city school setting

Monitoring forced expiratory volume in 1 second (FEV1) is a valuable component to determine asthma control1,2 and indicate the risk of future exacerbation3 in children. However, use of spirometry by patients outside health care facilities is limited by accessibility, staffing, time, and cost.

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