Journal of cardiopulmonary rehabilitation
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Flutter therapy uses a handheld instrument that consists of a pipe-like device with a ball in the central core that oscillates during exhalation, providing oscillating positive expiratory pressure. The purpose of this study was to determine the effect of airflow and the incline of the device at the mouth on expiratory pressure and oscillation frequency. ⋯ The results of this study indicate that a positive incline and a large airflow result in an increase in expiratory pressure. This information will assist clinicians to better understand the effects of the Flutter device.