Delivery device for a powder aerosol
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Accused Products
Abstract
The invention provides a delivery device (10) for a medicament comprising: a housing (50), a receptacle (54) holding a medicament (80) in the form of a powder; and a source of propellant (53), characterized in that the housing (50) provides an inlet (63) and an outlet (56) for the receptacle (54) wherein the inlet (63) is in fluid communication with the source of propellant (53) and is directed against the medicament (80) and the outlet (56) is spaced from the medicament (80) to allow aerosolisation of the medicament (80); the device (10) provides improved delivery efficiency, particularly a delivered fine particle fraction of greater than 20% by weight.
51 Citations
95 Claims
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1-48. -48. (canceled)
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49. A delivery device for a medicament, comprising:
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a housing, a receptacle holding a medicament in the form of a powder, and a source of propellant in the form of a canister of gas, wherein the housing provides an inlet and an outlet for the receptacle, wherein the inlet is in fluid communication with the source of propellant, the inlet is directed against the medicament, and the outlet is spaced from the medicament to allow aerosolization of the medicament. - View Dependent Claims (50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71)
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72. A housing for a delivery device for a medicament, comprising:
a first and a second open-ended compartment, wherein the first compartment is adapted to receive a source of propellant in the form of a canister of gas and the second compartment is adapted to receive a receptacle containing a medicament in powder form, wherein the second compartment provides an inlet for propellant in fluid communication with the first compartment and an outlet, wherein the outlet, in use, is spaced from the medicament to allow aerosolization of the medicament. - View Dependent Claims (73, 74, 75)
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76. A dispensing receptacle, comprising:
a receptacle unit containing a medicament in powder form, which receptacle unit is in fluid tight engagement with a header unit, wherein the header unit provides the receptacle unit with an inlet for a propellant and an outlet, wherein the outlet is spaced from the medicament to allow aerosolization of the medicament, and wherein the header unit has a propellant entry connector in fluid communication with the inlet for the propellant. - View Dependent Claims (77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94)
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95. A method of dispensing a medicament as an aerosol to a patient in need of such treatment which method comprises the steps of:
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providing a receptacle having an opening which receptacle contains the medicament in powder form;
discharging a pressurized propellant from a canister or cartridge through a delivery tube extending into the receptacle and directed at the medicament so as to fluidize it;
forming an aerosol by transfer of energy from the propellant to the powder; and
discharging the aerosol through an outlet passage provided at the opening of the receptacle.
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Specification