PATCH FOR EXTRACTING GLUCOSE

• US 20090018423A1
• Filed: 07/14/2006
• Published: 01/15/2009
• Est. Priority Date: 07/19/2005
• Status: Abandoned Application

• Current Assignee: KMH Company Limited of 405
• Original Assignee: KMH Company Limited of 405
• Inventors: Kim, Tae-Ho, Choi, Kwang-Jae, Lee, Seung-Ro
• Application Number:
  US11/995,867
• Publication Number:
  US 20090018423A1
• Time in Patent Office: Days
• US Class Current: 600/347
• CPC Class Codes: A61B 5/14514 using means for aiding extraction of interstitial fluid, e.g. microneedles or suction
• CPC Class Codes: A61B 5/1486 using enzyme electrodes, e.g. with immobilised oxidase
• 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

Disclosed herein is a patch for extracting glucose. The patch of the present invention includes a frame (310), a first electrode film (320), two media (330a, 330b), a second electrode film (350), and a support (360). The frame (310) includes two protrusions formed thereon, the two protrusions having contact holes. The first electrode film (320) is attached to an inner side of the frame, and is provided with holes corresponding to the contact holes, the first electrode film including electrodes, a terminal, and copper wires. The two media (330a, 330b) are accommodated in the protrusions and have ionic conductivity and hydrophilic properties, at least one of the two media including enzymes. The second electrode film (350) includes electrodes for extracting glucose, a terminal for realizing electrical connection and copper wires for connecting the electrodes to the terminal. The support (360) is attached to the second electrode film.

Claims

1. A patch for extracting glucose, comprising:

a frame including two protrusions formed thereon, the two protrusions having contact holes that are formed at center portions thereof and come into contact with skin;

a first electrode film attached to an inner side of the frame in a same shape as that of the frame, and provided with holes formed at locations corresponding to the contact holes, the first electrode film including a electrode for extracting glucose, a terminal for realizing electrical connection, and copper wires for connecting the electrodes to the terminal;

two media accommodated in the protrusions, respectively, and adapted to have ionic conductivity for movement of ions and hydrophilic properties, at least one of the two media including enzymes required to generate ions through reaction with glucose;

a second electrode film including electrodes placed at locations corresponding to the two media, respectively, to extract glucose, a terminal for realizing electrical connection, and copper wires for connecting the electrodes to the terminal; and

a support attached to the second electrode film and required for physical connection to a glucose measurement device.

2. The patch according to claim 1, wherein:

the first electrode film comprises a reference electrode used as a reference potential when current generated by reaction of the media with extracted glucose is measured, and a counter electrode used to measure current generated by reaction of the media with extracted glucose, and

the electrodes of the second electrode film comprise first and second extraction electrodes for extracting glucose form skin, and a working electrode for applying voltage that is used to measure current generated by reaction of the media with extracted glucose.

3. The patch according, to claim 2, wherein;

the counter electrode is formed in a shape of a ring, in which a hole corresponding to one of the contact holes is formed at a center portion, and is placed at a location corresponding to one of the media;

the reference electrode is formed in a shape of a bar that is curved along all outer side of the counter electrode,

the working electrode is formed in a shape of a circle, and is placed at a location corresponding to the counter electrode,

the first extraction electrode is formed iii a shape of a partially cut ring, and is formed to enclose an outer side of the working electrode, and

the second extraction electrode is formed in a shape of a ring, and is placed at a location corresponding to a medium, other than the medium corresponding to the counter electrode.

4. The patch according to claim 3, wherein the at least one medium including enzymes comprises a hydrophilic gel element and a nanofiber mesh sheet adhered to a bottom of the hydrophilic gel element and having enzymes attached thereto.

5. The patch according to claim 4, wherein the nanofiber mesh sheet is formed in a shape of a circle having a diameter greater than that of the first extraction electrode, a center of the circle being, placed at a location coincident with a center of the working electrode.

6. The patch according to claim 1, wherein:

the electrode of the first electrode film comprises a working electrode for applying voltage that is used to measure current generated by reaction of the media with extracted glucose, and

the electrodes of the second electrode film comprise a reference electrode used as a reference potential when current generated by reaction of the media with extracted glucose is measured, a counter electrode used to measure current generated by reaction of the media with extracted glucose, and first and second extraction electrodes used to extract glucose from skin.

7. The patch according to claim 6, wherein the working electrode is formed in a shape of a ring, in which a hole corresponding to one of the contact holes is formed at a center portion, and is placed at a location corresponding to one of the media,

the counter electrode is formed in a shape of a circle having a partially recessed edge, and is placed at a location corresponding to the working electrode;

the reference electrode is placed iii a location at which the edge of the counter electrodes is partially recessed,

the first extraction electrode is formed in a shape of a partially cut ring, and is formed to enclose an outer side of the counter electrode, and

the se-coned extraction electrode, is formed in a shape of a ring, and is placed at a location corresponding to a medium, other that the medium corresponding to the working electrode.

8. The patch according to claim 7, wherein the at least one medium including enzymes comprises a hydrophilic gel element and a nanofiber mesh sheet adhered to a bottom of the hydrophilic gel element and having enzymes attached thereto.

9. The patch according to claim 8, wherein the nanofiber mesh sheet is formed in a shape of a circle having a diameter greater than that of the first extraction electrode, a center of the circle being, placed at a location coincident with a center of the working electrode.

10. The patch according to claim 1, wherein the first electrode film and the second electrode film are constructed so that the electrodes, the terminals and the copper wires are printed on opposite surfaces thereof, and a portion of the first electrode film, other than the protrusions, is adhered to the second electrode film.

11. The patch according to claim 10, wherein the portion of the first electrode film, other than the protrusions, is adhered to the second electrode film so that the terminal of the first electrode film is electrically connected to the terminal of the second electrode film.

12. The patch according to claim 1 wherein a portion of the first electrode film, in which the terminal is placed, protrudes from a remaining portion of the first electrode film, thus forming a terminal protrusion, and a portion of the second electrode film, in which the terminal is placed, protrudes form a remaining portion of the second electrode film, thus forming a terminal protrusion.

13. The patch according to claim 12, wherein the terminal protrusion of the second electrode film protrudes further than the terminal protrusion ion of the first electrode film.

14. The patch according to claim 13, wherein the portion of the second electrode film, in which the terminal is placed, is bent at an edge portion of the support and is adhered to a bottom surface of the support, thus causing the terminal to be exposed from the back surface of the support.