Medical instrument for transdermally administering ionic medicine

• US 20040138609A1
• Filed: 12/24/2003
• Published: 07/15/2004
• Est. Priority Date: 12/26/2002
• Status: Active Grant

• Current Assignee: Tokuyama Corporation
• Original Assignee: Tokuyama Corporation
• Inventors: Fukuta, Kenji, Sakata, Kanji
• Granted Patent: US 7,428,435 B2
• Time in Patent Office: Days
• US Class Current: 604/20
• CPC Class Codes: A61N 1/30 Apparatus for iontophoresis, i.e. transfer of media in ionic state by an electromotoric force into the body, or cataphoresis

Abstract

A medical instrument for transdermally administering a medicine, in which an ionic medicine or an ionic medicine-containing substance is sealed in a bag made of an ion-exchange membrane. The medical instrument for transdermally administering the medicine is favorably used for executing the iontophoresis. By using this medical instrument, an iontophoresis device is realized in a simple structure, inexpensively and in a small size, which is suited for being carried yet making it easy to exchange the ionic medicine.

Claims

1. A medical instrument for transdermally administering a medicine comprising a bag made of an ion-exchange membrane, and an ionic medicine or an ionic medicine-containing substance sealed in the bag.

2. A medical instrument for transdermally administering a medicine according to claim 1, wherein the ionic medicine or the ionic medicine-containing substance is sealed in the bag by melt-adhering a mouth portion of the bag.

3. A medical instrument for transdermally administering a medicine according to claim 1, wherein the bag is formed by melt-adhering the peripheral edges of an anion-exchange membrane and of a cation-exchange membrane.

4. A medical instrument for transdermally administering a medicine according to claim 1, wherein the ionic medicine-containing substance is a sheet or a film impregnated with a solution of an ionic medicine.

5. A medical instrument for transdermally administering a medicine according to claim 1, which is used for the iontophoresis.

6. A portable iontophoresis device comprising a medical instrument for transdermally administering a medicine of claim 1, a working electrode connected to the medical instrument, and a counter electrode electrically connected to the working electrode through a cell.

7. A portable iontophoresis device according to claim 6, wherein the working electrode and the counter electrode are mounted on a flexible armoring member.

8. A portable iontophoresis device according to claim 7, wherein the working electrode and the medical instrument for transdermally administering the medicine are connected to each other through an electrolyte layer.

9. A portable iontophoresis device according to claim 7, wherein the counter electrode is provided with an electrolyte layer in the form of a paste or a gel, and the electrolyte layer and the medical instrument for transdermally administering the medicine are used being in contact with the surface of the living body.