Assessment of a new pressure manometer for use with an oscillating positive expiratory pressure (OPEP) device

Abstract

Rationale: The positive expiratory pressure generated from OPEP airway clearance devices is routinely targeted between 10 and 20cmH2O and can be confirmed through the use of a manometer attached to the OPEP device. This investigation assessed a new pressure manometer and determined how the control of pressure might also influence the frequency of oscillations. Methods: The pressure manometer (TMI, Canada) was assessed with the Aerobika* OPEP device (TMI). The manometer is attached directly to this OPEP device in the line of site of the user. Seven healthy volunteers were instructed to exhale through the OPEP device (3 times) according to the instructions for use and the average frequency of all oscillations per breath calculated for each subject. The same volunteers repeated the exercise with the manometer attached to the OPEP device and instruction to target the middle of the desired pressure range on the manometer. Results: See figure below. A theoretical optimum frequency range of 12-15Hz (King et al, 1983; Silva et al, 2009) is shaded. ![Figure][1] Conclusions: Use of the OPEP manometer in this study provided evidence supporting not only the utility with respect to ensuring a safe and effective positive pressure during use of the OPEP device, but also the ability to focus the related oscillation frequencies more closely in alignment with the reported optimum Hz range. [1]: pending:yes