Patent ID: 6732954
Filing Date: 2004-05-11
Classification: A61M,Y10T

Abstract:
A nozzle for aerosolizing a flowable liquid formulation for delivery to a patient, comprising:a sheet of material having an entrance side to which said formulation is applied, an exit side from which aerosol is released, and a nozzle area, which nozzle area has a plurality of pores therein through which said formulation is extruded, each of said pores having an entrance aperture and an exit aperture, wherein the ratio of pore entrance aperture size to pore exit aperture size is at least about 10:1, wherein each of the pores comprises two or more pore steps, each pore step having a pore step entrance aperture size and a pore step exit aperture size, and wherein the entrance aperture size of each successive pore step from the entrance side to the exit side of the sheet is about 20 to about 90% of the exit aperture size of the preceding, entrance-proximal, pore step.