This prospective, single-arm, self-controlled validation study aims to evaluate the accuracy and safety of the Spirometry Test System (STS) handheld device in measuring pulmonary parameters in pediatric subjects aged 7-17 years. Each participant will undergo pulmonary function testing using both conventional laboratory methods (spirometry and body plethysmography) and the STS device in randomized order. Agreement between methods, repeatability of measurements, and device safety will be assessed. The study will be conducted at Children's National Hospital, Washington, USA
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Agreement Between STS and Conventional Pulmonary Function Measurements in pediatric population
Timeframe: During study visit (single session)