Patent ID: 6732732
Filing Date: 2004-05-11
Classification: A61M

Abstract:
An inhalation device for administering a dose of powder contained in a receptacle, comprising:a chamber configured to hold the receptacle, said chamber defined by a wall and having a proximal end, a distal end, and an inner surface, said wall defining a plurality of vents; and an inhalation portion coupled to said proximal end of said chamber, said inhalation portion defining at least one aperture configured to emit powder therethrough; wherein the inhalation device is configured to have a resistance of at most 0.28 (cm H2O)1/2/L/min and to provide an emitted dose of at least 85% when the dose of powder is up to 20 mg and when the device is operated at a peak inspiratory flow rate of 25 L/min or less and at an inhalation volume of 0.75 L or less.