Non-rebreathing collapsible chamber continuous aerosol delivery

Details Non-rebreathing collapsible chamber continuous aerosol delivery Non-rebreathing collapsible chamber continuous aerosol delivery

1988-09-27

1989-09-12

Burr, Edgar S.

Surgery

Liquid medicament atomizer or sprayer

Gas stream aspirating medicament from reservoir

12820312, 12820329, A61M 1100, A61M 1500, A61M 1600

Patent

active

048650277

ABSTRACT:
A therapeutic respiratory apparatus is used to provide a continuous dosage of an aerosolized medicament to a patient. Pressurized carrier gas, which may be a mixture of oxygen and air, is supplied to a nebulizer which contains a reservoir of the liquid medicament. The aerosolized medicament is then delivered to a collapsible chamber which serves to store the aerosol between inhalations by the patient. Upon inhalation, the peak demand for the aerosolized mixture is drawn from the collapsible chamber, which is caused to collapse, so as to be reduced in its volume. A one-way valve prevents gas exhaled by the patient from being urged into the collapsible chamber. The exhalation gas is vented into the ambient air via exhaust valves in a mask, which may be an oxygen mask, coupled to the collapsible chamber. Replenishment of the medicament reservoir in the nebulizer is achieved via an infusion port which may be installed either through the wall of the nebulizer, or through the wall of the collapsible chamber, in the vicinity of the inlet thereof coupled to the nebulizer.

REFERENCES:
patent: 1693730 (1928-12-01), Schroder
patent: 3815596 (1974-06-01), Keener et al.
patent: 4098271 (1978-07-01), Maddock
patent: 4440163 (1984-04-01), Spergel

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