Patent ID: 6331290
Filing Date: 2001-12-18
Classification: A61M,B01F,B05B

Abstract:
A method for making particles from a liquid feedstock comprising a pharmaceutical composition and a solvent, the method comprising supplying the feedstock to an electronic droplet generator, the generator comprising a feed chamber to which the feedstock is supplied, a dispensing chamber having an inlet port communicating with the feed chamber and having an outlet port, and electronic means for applying a pressure pulse to the feed chamber and a pressure pulse to the dispensing chamber so that substantially all the liquid feedstock in the dispensing chamber is ejected at once, to form a droplet of the liquid feedstock, the electronic means applying the pressure pulses repeatedly, and the resulting droplets forming an aerosol in a holding chamber adjacent to the outlet port either until the solvent has evaporated, or until the droplets have been inhaled by a patient.