Mist inhaler

Surgery – Liquid medicament atomizer or sprayer

Patent

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Details

12820315, A61M 1100

Patent

active

051861640

ABSTRACT:
An inhaler apparatus by which a vapor is condensed by a powder containing medication into a cloud of very fine particles that can be inhaled deep into a patient's lungs. The apparatus includes an enclosure, preferably a transparent container, which enables the patient to observe the formation of the cloud. The cloud is formed because of the provision within the enclosure of the proper pressure, moisture content, temperature, and a dust-like powder that is actually the medication and which seeds the cloud. A heater is placed adjacent a liquid to cause the liquid to heat and vaporize. A small pump reduces the pressure within the container only the amount required to achieve the proper conditions for the cloud formation. A liquid is placed in a liquid containing part of the container. The patient actuates the starting mechanism and the pump partially evacuates the transparent container; then the heating element commences vaporizing the water, after which suitable medication powder flows into the transparent container, and seeds the cloud. The cloud should form at the instant the powdered medication is introduced into the transparent container. This is the signal for the patient to inhale the cloud.

REFERENCES:
patent: 286666 (1883-10-01), Willis
patent: 639878 (1899-12-01), Wezel
patent: 1416244 (1922-05-01), Thompson
patent: 3809294 (1974-05-01), Torgeson
patent: 4674491 (1987-06-01), Brugger et al.

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