Supersonic nozzle nebulizer

Details Supersonic nozzle nebulizer Supersonic nozzle nebulizer

1997-12-29

2000-01-04

Weiss, John G.

Surgery

Liquid medicament atomizer or sprayer

Gas stream aspirating medicament from reservoir

12820014, 12820018, 12820312, 12820425, A61M 1100

Patent

active

060098694

ABSTRACT:
A nebulizer for entraining liquid in a flow of carrier gas from a carrier gas source at a select pressure includes a nozzle defining a passage which is circular in cross section and includes a converging section, a throat and a uniformly diverging section, all of which are coaxial and serially connected. The nozzle has an inlet at the mouth of the converging section and an outlet defining a primary orifice at the mouth of the diverging section. The inlet is connectable in fluid communication with the pressurized carrier gas source. The nebulizer further includes a reservoir for the liquid to be entrained and a conduit for conveying a liquid in the reservoir between the reservoir and the primary orifice. The conduit further includes a jacket spaced from and enveloping the primary orifice defining a liquid chamber about the primary orifice. The jacket has a secondary orifice spaced from and coaxial with the primary orifice. A method of entraining a liquid in a flow of carrier gas for delivery to a patient utilizes the nozzle described above to accelerate a carrier gas to a supersonic velocity. A liquid is delivered to the primary orifice and sheared by the supersonic carrier gas.

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