Methods and apparatus for delivering aerosolized medication

Details Methods and apparatus for delivering aerosolized medication Methods and apparatus for delivering aerosolized medication

1999-06-07

2000-02-22

Weiss, John G.

Surgery

Liquid medicament atomizer or sprayer

Pre-pressurized container holding medicament

12820014, 12820018, 12820312, A61M 1100, A61M 1500

Patent

active

060268085

ABSTRACT:
A metered dose inhaler (10) for use with a pressurized aerosol canister (18) includes a housing (12) defining a conduit (16) with a mouthpiece (56), and an actuator (26) with a nozzle discharge orifice (30) arranged to discharge aerosol into the conduit. An air tube (34) is arranged within the conduit with an inlet (38) of the air tube formed in the conduit wall (74) and an outlet (36) of the air tube in opposing relationship with the nozzle orifice. Inhalation through the mouthpiece causes air to be drawn into the inlet and flow out of the outlet of the air tube to form an air jet which impinges on an oppositely moving aerosol plume from the orifice. Auxiliary air inlets (46) in the closed end (24) of the conduit provide a boundary layer flow along the inner wall (44) of the conduit. Vortex generators (54) on the inner wall of the conduit add vorticity and turbulence to the boundary layer flow.

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