The device can be used at any level of fitness and lung capacity. It can then be naturally coughed out by moving up the airways. Bush A. There are many things to consider when it comes to the requirements. Oral high frequency oscillation causes a greater mucociliary clearance in the average man. Apple disclaims all responsibility for the acts and omissions of third parties arising from or related to your site use. The owner doesn't endorse any particular company. It creates positive expiratory pressure that improves airway clearance through airway vibrations. Anyone can use it wherever they are without any problems or support. AirPhysio is FDA-compliant. It is also useful for wheezing, congestion, clogged sinuses and other respiratory problems. This pressure is created even when the steel balls are not moving. After using the device, you can remove it from your pocket and let it cool down for a bit before storing it away.