Dry powder inhaler and process that explosively discharges a dos

Details Dry powder inhaler and process that explosively discharges a dos Dry powder inhaler and process that explosively discharges a dos

1993-07-15

1994-09-27

Asher, Kimberly L.

Surgery

Respiratory method or device

Means for mixing treating agent with respiratory gas

12820315, 604 58, 206531, A61M 1500, A61M 1600, A61M 1300, B65D 8304

Patent

active

053499476

ABSTRACT:
A powder inhaler and process are provided for aerosolizing finely powdered or pulverized medication and a gas provided in a pillow or blister-type container of extremely thin elastic suitable plastic construction. The pillow is compressed between an anvil with a conical depression and a confronting conical piston. The conical depression has a small orifice at its apex, and the periphery of the pillow is restrained so that compression between the conical pillow and the conical depression produces explosive rupture of the pillow and exit of the gas and medication at a very high speed up to supersonic through said orifice. Medication particle clumps are very efficiently separated into separate particles, and the gas/medication exiting from the orifice are conveyed through a very small area linear or curved tube to a dispersal chamber or directly to a patient, movement through the tube producing a shearing action further enhancing separation of aggregated particles of powder medication.

REFERENCES:
patent: 2549303 (1951-04-01), Friden
patent: 3367535 (1968-02-01), Tanguay
patent: 4905866 (1990-03-01), Bartell et al.

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