A New Principle After 3 years of studies, our new principle has given birth to SELECTOR M Selector M uses the surface pressure and liquid gravity to reduce by a factor 2 the drug loss from nebulizer. Selector M enables to reduce drug dumping in the atmosphere by using doplet impact principle in nebulizer.

Inhaling phase (drawing 1) 1. Aerosol is produced by air decompression. 2. Smallest particles are selected. 3. Patient inhaled air improves aerosol production : breath enhanced nebulizer. 4. Biggest accumulated particles are recycled at selector M bottom. Exhalation phase (drawing 2) 1. Exhaust particles in nebulizer are speeded up in selector M. 2. Biggest particles return directly to liquid stage. 3. The lightest fraction only is rejected out of the nebulizer. The particles rejected during inhalation phase is minimum.