Hq Med ( P.H No.291045 ) Oscillating Positive Expiratory Pressure (Opep) Device Is A Drug Free, Easy To Use, Hand Held Device With A Pressure Oscillation Dynamic That Provides Intermittent Resistance And Creates Positive Pressure And Oscillations Simultaneously. The Opep Device Opens Weak Or Collapsed Airways To Mobilize And Assist Mucociliary Clearance To The Upper Airways Where It Can Be Coughed Out, An Adjustable Resistance Allows The Device To Accommodate The Lung Capacity Of Most Patien