GB2405350A — A nasal delivery device operated by exhalation into a mouthpiece

USPTO Abstract

A delivery device has an outlet member <B>19</B> through which substance, as an aerosol or vapour is delivered in an entraining gas flow, and a substance supply unit <B>15</B>. The substance supply unit <B>15</B> comprises a flow channel <B>21</B> fluidly connected to the outlet member <B>19</B> and a substance supporting element <B>27</B> for supporting substance, at least a surface of which is disposed in the flow channel <B>21.</B> The substance is entrained by the gas flow flowing over or through the substance supporting element <B>27.</B> The device may also have a mouthpiece <B>17</B> which is fluidly connected to the flow channel <B>21,</B> whereby exhalation into the mouthpiece <B>17</B> generates an entraining gas flow. The substance supporting element <B>27</B> may comprise a porous capillary element loadable with substance and the flow channel <B>21</B> may comprise an upstream flow section and a downstream flow section with a flow resistor <B>31</B> fluidly connecting the upstream and downstream channels. The outlet may comprise a nosepiece <B>19</B> for fitting into a nostril. Also disclosed is a delivery device comprising an outlet member, a substance supply unit wherein the substance supply unit comprises a flow channel which is fluidly connected to the outlet member and defines a receiving chamber; a cartridge containing substance to be entrained which is openable to release a contained substance; a method of delivering substance by providing a substance supporting element in a flow channel, delivering an entraining gas flow through the flow channel to entrain substance from the substance supporting element.