Engineered particles and methods of use
First Claim
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1. A method of delivering a therapeutic dose of a bioactive agent to the pulmonary air passages in a single breath, the method comprising:
- providing a receptacle containing a mass of particles, the particles comprising a bioactive agent and having perforated microstructures with a bulk density of less than 0.5 g/cm3; and
administering the particles as an aerosol from the receptacle to a subject'"'"'s respiratory tract;
wherein the particles are sized and shaped so that at least 50% of the mass of the particles are delivered to the subject'"'"'s respiratory tract and wherein the fine particle fraction of particles of the aerosol is greater than 60% w/w.
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Abstract
Engineered particles are provided may be used for the delivery of a bioactive agent to the respiratory tract of a patient. The particles may be used in the form of dry powders or in the form of stabilized dispersions comprising a nonaqueous continuous phase. In particularly preferred embodiments the particles may be used in conjunction with an inhalation device such as a dry powder inhaler, metered dose inhaler or a nebulizer.
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Citations
57 Claims
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1. A method of delivering a therapeutic dose of a bioactive agent to the pulmonary air passages in a single breath, the method comprising:
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providing a receptacle containing a mass of particles, the particles comprising a bioactive agent and having perforated microstructures with a bulk density of less than 0.5 g/cm3; and administering the particles as an aerosol from the receptacle to a subject'"'"'s respiratory tract; wherein the particles are sized and shaped so that at least 50% of the mass of the particles are delivered to the subject'"'"'s respiratory tract and wherein the fine particle fraction of particles of the aerosol is greater than 60% w/w. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 40, 41, 42)
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10. A method of delivering a therapeutic dose of a bioactive agent to the pulmonary air passages, the method comprising:
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providing a suspension of particles in a hydrofluoroalkane propellant, the particles comprising a bioactive agent, perforated microstructures and a bulk density of less than 0.5 g/cm3; and administering the particles to a subject'"'"'s respiratory tract as an aerosol, wherein the particles are sized and shaped so that the mass of particles impacting the throat is less than 40% w/w. - View Dependent Claims (11, 12, 13, 14, 15, 16, 43, 44, 45)
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17. A method of delivering a therapeutic dose of a bioactive agent to the pulmonary air passages, the method comprising:
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providing particles comprising a bioactive agent and having perforated microstructures with a bulk density of less than 0.5 g/cm3; and administering the particles to a subject'"'"'s respiratory tract in a single breath, wherein the particles are sized and shaped so that the deposition of the particles in the deep lung is independent of inhalation flow rate and wherein said administration results in a fine particle fraction of at least 60% w/w. - View Dependent Claims (18, 19, 20, 46, 47, 48)
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21. A method of delivering a therapeutic dose of a bioactive agent to the pulmonary air passages in a single breath, the method comprising:
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providing a receptacle containing a mass of porous particles, the porous particles comprising a bioactive agent and having a bulk density of less than 0.5 g/cm3; and administering the porous particles as an aerosol from the receptacle to a subject'"'"'s respiratory tract; wherein the porous particles are sized and shaped so that at least 50% of the mass of the porous particles are delivered to the subject'"'"'s respiratory tract and wherein the fine particle fraction of porous particles of the aerosol is greater than 60% w/w. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 49, 50, 51)
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29. A method of delivering a therapeutic dose of a bioactive agent to the pulmonary air passages, the method comprising:
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providing a suspension of porous particles comprising a bioactive agent and a bulk density of less than 0.5 g/cm3 in a hydrofluoroalkane propellant; and administering the porous particles to a subject'"'"'s respiratory tract as an aerosol, wherein the porous particles are sized and shaped so that the mass of porous particles impacting the throat is less than 40% w/w. - View Dependent Claims (30, 31, 32, 33, 34, 35, 52, 53, 54)
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36. A method of delivering a therapeutic dose of a bioactive agent to the pulmonary air passages, the method comprising:
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providing porous particles comprising a bioactive agent and having a bulk density of less than 0.5 g/cm3; and administering the porous particles to a subject'"'"'s respiratory tract in a single breath, wherein the porous particles are sized and shaped so that the deposition of the porous particles in the deep lung is independent of inhalation flow rate and wherein said administration results in a fine particle fraction of at least 60% w/w. - View Dependent Claims (37, 38, 39, 55, 56, 57)
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Specification