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" ... To work around this, the team developed a device that used bi-directional exhalation to allow fluticasone, a well-understood steroid, to move around the obstructions in the nasal cavity and reach the heard to reach cavities. Breathing out, rather than breathing into an inhaler, creates a seal in the soft palate, that transfers pressure into the nose and allows the medication to travel further into the nasal cavities. Although it might sound complicated, patients need only to insert the nose piece into one nostril while blowing into the mouthpiece. ... "