Nasal delivery devices
A nasal delivery device for and method of delivering particulate substance to the nasal airway of a subject. The delivery device includes a body assembly including a mouthpiece unit which includes a mouthpiece through which the subject in use exhales, and a substance-supply unit which is fluidly connected to the mouthpiece unit and actuatable to provide particulate substance for delivery to the nasal airway of the subject. The body assembly is configured to receive a replaceable nosepiece unit which includes a nosepiece and contains a container containing particulate substance.
1. A nasal delivery device for delivering a particulate substance to the nasal airway of a subject, the delivery device comprising:
a mouthpiece unit which includes a mouthpiece through which the subject in use exhales;
a nosepiece unit which includes a nosepiece for fitting to a nostril of the subject; and
a substance-supply unit which is configured to receive a container containing the particulate substance, the substance-supply unit operable to provide a metered amount of the particulate substance, such that an exhalation air flow delivered through the substance-supply unit entrains the substance;
the substance-supply unit including a support member and a body section that is movable relative to the support member between a first, container-receiving position for receiving a container in which the container is not disposed in fluid communication with the mouthpiece unit and the nosepiece unit, and a second, operative position in which the container is in fluid communication with the mouthpiece unit and the nosepiece unit;
wherein one of the support member and the body section includes an inlet aperture which is fluidly isolated from the mouthpiece unit when the body section is in the container-receiving position and fluidly connected to the mouthpiece unit when the body section is in the operative position.
2. The delivery device of claim 1 , wherein the container comprises first and second parts which together define an enclosed chamber and are movable between a first, closed configuration in which the container is closed and a second, open configuration in which the container is open and the substance-supply unit is operable to move the first and second parts of the container to the open configuration.
3. The delivery device of claim 2 , wherein the first and second parts of the container are slideably disposed relative to one another and each include at least one aperture, wherein the aperture of the first part and the aperture of the second part are covered when the first and second parts in the closed configuration and the aperture of the first part and the aperture of the second part are uncovered when the first and second parts of the container are in the open configuration.
4. The delivery device of claim 1 , wherein the body section is configured to rotate relative to the support member.
5. The delivery device of claim 4 , wherein the body section includes a container-receiving aperture, wherein the container-receiving aperture is uncovered when the body section is in the container-receiving position and is covered when the body section is in the operative position.
6. The delivery device of claim 1 , further comprising:
a housing which supports the mouthpiece unit, the nosepiece unit and the substance-supply unit.
7. The delivery device of claim 6 , wherein the substance-supply unit includes a container-receiving member which is movably disposed between an open position for enabling loading of a container into the container-receiving member, and a closed position in which the container is contained within the housing.
8. The delivery device of claim 7 , wherein the container-receiving member includes a cavity which defines an exhalation flow channel between the mouthpiece unit and the nosepiece unit, the exhalation flow channel configured to direct the exhalation air flow through the exhalation flow channel when the subject exhales through the mouthpiece.
9. The delivery device of claim 7 , wherein the substance-supply unit includes a locking mechanism for locking the container-receiving member in the closed position.