Device for the administration of powdered medicinal substances

Details Device for the administration of powdered medicinal substances Device for the administration of powdered medicinal substances

1993-02-01

1994-10-04

Burr, Edgar S.

Surgery

Respiratory method or device

Means for mixing treating agent with respiratory gas

12820315, A61M 1500

Patent

active

053516834

ABSTRACT:
An inhaler for the local administration of powdered drugs to the respiratory tract. The inhaler includes a nozzle and a main body which itself defines a storage chamber for the medicinal substance, a dosing mechanism which supplies precisely measured doses of the drug and a dispensing system which pours the dose of the drug delivered into a collecting chamber. A cavity of the nozzle communicates with the collecting chamber through a central channel designed to reduce air flow resistance as much as possible. Lateral holes provided in the body of the inhaler allow for the passage of air from the outside. Upon inhalation, a negative pressure is created in the chamber in which the dose of powder delivered is collected, drawing an air inflow from the outside. The air flow is mixed with the medicinal substance particles and through the central channel, enters the cavity of the nozzle from where it is directly inhaled.

REFERENCES:
patent: 2259759 (1941-10-01), Lufkin
patent: 2310681 (1943-02-01), Derham et al.
patent: 2609817 (1952-09-01), Falcone
patent: 4069819 (1978-01-01), Valentini et al.
patent: 4274403 (1981-06-01), Struve
patent: 4889114 (1989-12-01), Kladders

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