Electrotransort device comprising blades

• US 6,532,386 B2
• Filed: 08/30/1999
• Issued: 03/11/2003
• Est. Priority Date: 08/31/1998
• Status: Expired due to Term

• Current Assignee: Johnson & Johnson Consumer Companies Incorporated (Johnson & Johnson)
• Original Assignee: Johnson & Johnson Consumer Companies Incorporated (Johnson & Johnson)
• Inventors: Niemiec, Susan M., Oakeson, Ralph W., Sun, Ying, Wang, Jonas C. T., Wisniewski, Stephen J.
• Primary Examiner(s): MENDEZ, MANUEL A
• Application Number:
  US09/385,284
• Publication Number:
  US 20020115957A1
• Time in Patent Office: 1,289 Days
• Field of Search: 604/20-22, 604/46-47, 604/890.1, 128/114.1, 128/907, 600/306, 600/362, 600/556, 424/9.8, 424/9.81, 424/449
• US Class Current: 604/20
• CPC Class Codes: A61M 2037/0007 having means for enhancing the permeation of substances through the epidermis, e.g. using suction or depression, electric or magnetic fields, sound waves or chemical agents
• CPC Class Codes: A61M 2037/0023 Drug applicators using microneedles
• CPC Class Codes: A61M 37/0015 by using microneedles
• CPC Class Codes: A61N 1/303 Constructional details electrodes for external use A61N1/0428

Abstract

The present invention relates to an apparatus for transporting a compound through a barrier membrane of a mammal comprising: (a) a vessel having a membrane contacting surface, said surface having a plurality of exposed blades and a channel adjacent to said blades; (b) a reservoir in communication with said channels for storage of said compound; and (c) an electrode in communication with said reservoir, wherein the width of said blades are tapered away from said surface.

Claims

1. An apparatus for transporting a compound through a barrier membrane of a mammal comprising:

(a) a vessel having a membrane contacting surface, said surface having a plurality of exposed blades and a channel adjacent to said blades;

(b) a reservoir in communication with said channels for storage of said compound; and

(c) an electrode in communication with said reservoir,

wherein the width and the thickness of said blades are tapered away from said surface.

2. An apparatus as defined in claim 1, wherein said channel is adjacent to at least three blades.

3. An apparatus as defined in claim 2, wherein said surface comprises a plurality of channels, where said channels are adjacent to at least three blades.

4. An apparatus as defined in claim 3, wherein the height of one of said blades adjacent to said channels is at least 25 percent greater than the other blades.

5. An apparatus as defined in claim 3, wherein at least one side of the face of said blades are curved.

6. An apparatus as defined in claim 3, wherein said channels are spaced from about 100 mm to 10 mm from one another.

7. An apparatus as defined in claim 3, wherein said blades comprise one or more non-electrical conductive materials.

8. An apparatus as defined in claim 3, wherein the edges of said blade are curved.

9. An apparatus as defined in claim 3, wherein said blades have a height of from about 100 to about 1,500 mm.

10. An apparatus as defined in claim 3, wherein said blades have a width to thickness ratio measured at half the height of said blades of at least 2.

11. An apparatus as defined in claim 1, wherein said reservoir comprises:

an electrode reservoir in communication with said electrode;

a compound reservoir in communication with said channels; and

a semipermeable membrane in communication with said electrode reservoir and said compound reservoir.

12. An apparatus as defined in claim 11, wherein said semipermeable membrane only permeates molecules having a molecular weight less than the molecular weight of said compound.

13. An apparatus as defined in claim 11, wherein the volume ratio of said compound reservoir to said electrode reservoir is less than about 1.

14. An apparatus as defined in claim 1, further comprising an electronic control unit electrically connected to said electrode, said electronic control unit for controlling the electrical current through said electrode.

15. An apparatus as defined in claim 14, further comprising at least one sensor, said sensor transmitting detected information to said electronic control unit, said electronic control unit varying the electrical current through said electrode dependent on the information received from said sensor.

16. An apparatus as defined in claim 15, wherein said sensor is selected from the group consisting of a pH sensor, conductivity sensor, ion-selective electrode, sensor based on amperometry, and sensor based on potentiometry.

20. An apparatus as defined in claim 1, wherein said apparatus further comprises a counter electrode and an electronic control unit, wherein said electronic control unit is electrically connected to said electrode and said counter electrode, and said electronic control unit controls the electrical current through said electrode.

17. A transdermal iontophoretic system comprising:

(a) a first electrode comprising

(1) a vessel having a membrane contacting surface, said membrane contacting surface having a plurality of exposed blades and channels adjacent said blades wherein the width and the thickness of said blades are tapered away from said surface;

(2) a reservoir in communication with said channels; and

(3) an electrode in communication with said reservoir;

(b) a counter electrode; and

(c) an electronic control unit,

wherein said electronic control unit is electrically connected to said electrode and said counter electrode, and said electronic control unit controls the electrical current through said electrode.

18. A method for transporting a compound across a barrier membrane of a mammal comprising:

(a) penetrating said barrier membrane with a plurality of blades spaced at predetermined intervals to form pathways through said barrier membrane; and

(b) applying an electrical current through said mammal to cause a compound to cross said barrier membrane through said pathways,

wherein the width and the thickness of said blades are tapered away from said surface.

19. A method of claim 18, wherein said method further comprises administering to said barrier membrane a penetration enhancing agent.