De-aggregating and dispersing dry medicament powder into air

Details De-aggregating and dispersing dry medicament powder into air De-aggregating and dispersing dry medicament powder into air

2005-01-11

2005-01-11

Bennett, Henry (Department: 3743)

Surgery

Respiratory method or device

Means for mixing treating agent with respiratory gas

C128S203120, C128S203190

Reexamination Certificate

active

06840239

ABSTRACT:
A method based on an Air-razor tool is disclosed thereby providing de-aggregation and dispersal into air of a dose of finely divided medication powder. In sucking air through a nozzle, particles of a powder dose made available to the nozzle, are gradually de-aggregated and dispersed into a stream of air entering the nozzle. The gradual de-aggregation or dispersal is produced by a relative motion introduced between the nozzle and the dose. In a preferred embodiment, the powder is deposited onto a substrate, occupying a larger area than the area of the nozzle inlet. The nozzle is preferably positioned outside the powder area, not accessing the powder in its relative motion until a created air stream entering the nozzle, exceeds a threshold flow velocity.

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