Tissue electroperforation for enhanced drug delivery

• US 7,113,821 B1
• Filed: 08/23/2000
• Issued: 09/26/2006
• Est. Priority Date: 08/25/1999
• Status: Expired due to Term

• Current Assignee: Lifescan Incorporated (Duv Holding Corporation)
• Original Assignee: Johnson & Johnson Consumer Companies Incorporated (Johnson & Johnson)
• Inventors: Oakeson, Ralph W., Wang, Jonas C. T., Wisniewski, Stephen J., Sun, Ying
• Primary Examiner(s): Lucchesi, Nicholas D.
• Assistant Examiner(s): DeSanto, Matthew F.
• Application Number:
  US09/644,093
• Time in Patent Office: 2,225 Days
• Field of Search: 514/44, 514/54, 514/2, 514/12, 514/23, 436/147, 436148-149, 604/20, 604/21, 604/500, 604/503, 604/509, 604/114, 604/96.01, 606 27- 29, 606/31, 606/32, 606/91, 606 46- 50, 606191-193, 607/96, 607/101, 607/102, 607/117, 607/116, 607/138
• US Class Current: 604/21
• CPC Class Codes: A61B 5/14514 using means for aiding extraction of interstitial fluid, e.g. microneedles or suction
• CPC Class Codes: A61N 1/306 Arrangements where at least part of the apparatus is introduced into the body
• CPC Class Codes: A61N 1/325 for iontophoresis, i.e. transfer of media in ionic state by an electromotoric force into the body electrodes for external use A61N1/0428

Abstract

The present invention relates to a method and a device for transporting a molecule through a mammalian barrier membrane of at least one layer of cells comprising the steps of: ablating the membrane with an electric current from a treatment electrode; and utilizing a driving force to move the molecule through the perforated membrane.

Claims

1. A method for transporting a molecule through a mammalian barrier membrane of at least one layer of cells comprising the steps of:

creating an air gap between a treatment electrode and said membrane;

then ablating said membrane with an electric current from said treatment electrode wherein said electric current forms an electric arc within said air gap between said treatment electrode and said membrane; and

utilizing a driving force to move said molecule through said ablated membrane, wherein said membrane is skin or a mucosal membrane.

2. The method of claim 1, wherein said molecule is a pharmaceutical transported through said membrane into said mammal.

3. The method of claim 2, wherein said pharmaceutical is selected from the group consisting of polysaccharides, peptides, and proteins.

4. The method of claim 1, further comprising the step of applying a conductive material to said membrane prior to said ablation.

5. The method of claim 4, wherein said conductive material is selected from the group consisting of electrolytes, metal particles, and carbon particles.

6. The method of claim 1, wherein the voltage of said electric current is from about 5 to about 2,000 V.

7. The method of claim 1, wherein said method further comprises the use of an indifferent electrode, where said electric current passes from said treatment electrode to said indifferent electrode.

8. The method of claim 1, wherein said electric current comprises a direct current.

9. The method of claim 1, wherein said electric current comprises an alternating current.

10. The method of claim 1, wherein said electric current has a frequency of between about 60 kHz to about 5,000 kHz.

11. The method as in claim 1, wherein the waveform of said electric current is selected from the group consisting of damped sine wave, modulated sine wave, pure sine wave, damped square wave, modulated square wave, pure square wave, direct current and a blend wave thereof.

13. The method of claim 1, wherein said membrane is skin.

14. The method of claim 1, wherein said driving force is selected from a group consisting of iontophoresis, electro-osmosis, reverse iontophoresis, electroporation, phonophoresis, pressure gradients, heat and concentration gradients.

15. The method of claim 1, further comprising the step of piercing said membrane with a member selected from the group consisting of needles and blades.

16. The method of claim 1, further comprising the step of cooling said membrane prior to or during said ablation.

17. The method of claim 1, further comprising the step of applying an analgesic to said membrane prior to or during said ablation.

18. The method of claim 1, further comprising the step of monitoring the electrical resistance or impedance of said membrane in order to determine the presence of ablation in said membrane.

12. The method of clam 1, wherein said membrane is a mucosal membrane selected from the group consisting of buccal, vaginal, and rectal membranes.