Inhalation device for producing a drug aerosol
First Claim
1. A device for delivering a drug by inhalation or nasally, comprising a) a body defining an interior flow-through chamber having upstream and downstream chamber openings, b) a drug supply unit contained within said chamber for producing, upon actuation, a heated drug vapor in a condensation region of the chamber adjacent the substrate and between the upstream and downstream chamber openings, wherein gas flowed through said chamber region at a selected gas-flow rate is effective to condense drug vapor produced by said unit to form drug condensation particles having a selected MMAD particle size, c) a gas-flow control valve disposed upstream of said unit for limiting gas-flow rate through said condensation region to said selected gas-flow rate, as gas is flowed through said chamber, and d) an actuation switch for actuating said unit, such that said unit produces vapor with the gas-flow rate through said chamber controlled to said selected flow rate.
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Accused Products
Abstract
A device for delivering a drug by inhalation is disclosed. The device includes a body defining an interior flow-through chamber having upstream and downstream chamber openings, and a drug supply unit contained within the chamber for producing, upon actuation, a heated drug vapor in a condensation region of the chamber. Gas drawn through the chamber region at a selected gas-flow rate is effective to form drug condensation particles from the drug vapor having a selected MMAD between 0.02 and 0.1 MMAD or between 1 and 3.5 μm. A gas-flow control valve disposed upstream of the unit functions to limit gas-flow rate through the condensation region to the selected gas-flow rate. An actuation switch in the device activates the drug-supply unit, such that the drug-supply unit can be controlled to produce vapor when the gas-flow rate through the chamber is at the selected flow rate.
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Citations
15 Claims
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1. A device for delivering a drug by inhalation or nasally, comprising
a) a body defining an interior flow-through chamber having upstream and downstream chamber openings, b) a drug supply unit contained within said chamber for producing, upon actuation, a heated drug vapor in a condensation region of the chamber adjacent the substrate and between the upstream and downstream chamber openings, wherein gas flowed through said chamber region at a selected gas-flow rate is effective to condense drug vapor produced by said unit to form drug condensation particles having a selected MMAD particle size, c) a gas-flow control valve disposed upstream of said unit for limiting gas-flow rate through said condensation region to said selected gas-flow rate, as gas is flowed through said chamber, and d) an actuation switch for actuating said unit, such that said unit produces vapor with the gas-flow rate through said chamber controlled to said selected flow rate.
Specification