Synthetic jet based medicament delivery method and apparatus
A dry powder inhaler consisting of first chamber having an orifice for holding a dry powder and a gas, and a second chamber for receiving a deaggregated form of the dry powder and for communicating the deaggregated dry powder to a user. A synthetic jet drives the dry powder from the first chamber to the second chamber.
1. A dry powder inhaler for delivering a dry powder to a user, comprising:
a pack forming a first chamber for holding a dry powder;
a second chamber directly communicating with the first chamber through a passageway for receiving the dry powder, aerosolized in air in the first chamber, and for delivering the aerosolized dry powder to a user; and
a vibrator separate from and coupled to the first chamber for vibrating the first chamber to aerosolize the dry powder in air in the first chamber and drive the dry powder back and forth in the passageway from the first chamber to the second chamber as an aerosolized dry powder in the form of a series of slugs of air containing aerosolized dry powder, wherein the aerosolized dry powder is introduced into the second chamber by synthetic jetting, and directly delivered from the second chamber to a user.
2. The dry powder inhaler of claim 1 , wherein the passageway has an aspect ratio of length to cross-section of at least 0.5.
3. The dry powder inhaler of claim 1 , wherein the first chamber comprises a preformed blister pack.
4. The dry powder inhaler of claim 1 , wherein the first chamber has a cylindrical shape.
5. The dry powder inhaler of claim 1 , wherein the first chamber has a cone shape.
6. The dry powder inhaler of claim 1 , wherein the first chamber forms a standing wave resonator when coupled to the vibrator.
7. The dry powder inhaler of claim 1 , wherein the first chamber has a horn shape.
8. The dry powder inhaler of claim 1 , wherein the first chamber forms a Helmholtz resonator when coupled to the vibrator.
9. A dry powder inhaler for delivering a dry powder to a user, comprising:
a pre-formed package for holding a dry powder;
a flow chamber directly connected to the pre-formed package by a passageway for receiving the dry powder aerosolized in air in the pre-formed package and for delivering the aerosolized dry powder to a user; and
a vibrator for coupling to the pre-formed package for aerosolizing the dry powder in the package and driving the dry powder back and forth in the passageway from the package to the flow chamber, whereupon the dry powder is moved from the package to the flow chamber carried by impulses of air created by said vibrator, and directly delivered from the flow chamber to a user.
10. The dry powder inhaler of claim 9 , wherein the passageway has an aspect ratio of length to cross-section of at least 0.5.
11. The dry powder inhaler of claim 9 , wherein the pre-formed package is a blister pack.
12. The dry powder inhaler of claim 9 , wherein the pre-formed package has a cylindrical shape.
13. The dry powder inhaler of claim 9 , wherein the pre formed package has a cone shape.
14. The dry powder inhaler of claim 9 , wherein the pre-formed package forms a standing wave resonator when coupled to the vibrator.
15. The dry powder inhaler of claim 9 , wherein the pre-formed package forms a Helmholtz resonator when coupled to the vibrator.
16. The dry powder inhaler of claim 9 , wherein the vibrator is a piezoelectric transducer.
17. The dry powder inhaler of claim 9 , wherein the pre formed package is constructed of plastic.
18. The dry powder inhaler of claim 9 , wherein the pre-formed package is constructed of a cold formed laminate material.
19. The dry powder inhaler of claim 18 , wherein the laminate material comprises a ti-laminate of oriented polyamide, aluminum foil and polyvinylchloride.
20. The dry powder inhaler of claim 9 , wherein the pre-formed package is constructed of a metal.
21. A dry powder inhaler for delivering a dry powder to a user, comprising:
a first chamber for holding a dry powder;
a second chamber directly connected to the first chamber by a passageway for receiving the powder aerosolized in air in the first chamber and for delivering the aerosolized dry powder to a user; and
a vibrator for coupling to the first chamber for establishing vortices of aerosolize dry powder at both ends of the passageway, whereupon the dry powder is moved around and deaggregated in the first chamber, and a fraction of the dry powder suspended in the air is passed through the passageway to the second chamber without returning to the first chamber, and directly delivered from the second chamber to a user.
22. The dry powder inhaler of claim 21 , wherein the passageway has an aspect ratio of length to cross-section of at least 0.5.
23. The dry powder inhaler of claim 21 , wherein the first chamber is a blister pack.
24. The dry powder inhaler of claim 21 , wherein the first chamber forms a standing wave resonator when coupled to the vibrator.
25. The dry powder inhaler of claim 21 , wherein the first chamber forms a Helmholtz resonator when coupled to the vibrator.
26. The dry powder inhaler of claim 21 , wherein the vibrator is a piezoelectric transducer.
27. The dry powder inhaler of claim 21 , wherein synthetic jets are created by the vortices.