Devices, methods, and systems for measuring analytes extracted through skin

• US 20060129035A1
• Filed: 12/23/2003
• Published: 06/15/2006
• Est. Priority Date: 12/27/2002
• Status: Abandoned Application

• Current Assignee: Sysmex Corporation
• Original Assignee: Sysmex Corporation
• Inventors: Mizuno, Takeshi, Maekawa, Yasunori, Sawa, Kenichi, Asano, Kaoru
• Application Number:
  US10/745,443
• Publication Number:
  US 20060129035A1
• Time in Patent Office: Days
• US Class Current: 600/300
• CPC Class Codes: A61B 10/0045 Devices for taking samples of body liquids devices for taking blood samples A61B5/15
• CPC Class Codes: A61B 2010/008 Interstitial fluid
• CPC Class Codes: A61B 5/1486 using enzyme electrodes, e.g. with immobilised oxidase
• CPC Class Codes: A61B 5/1495 Calibrating or testing of in-vivo probes

Abstract

Measuring devices for measuring an analyte extracted through skin of a living body are described that include: a noninvasive sampling unit for extracting the analyte from the living body through analyte transmission paths formed in an extracting region of the skin; an analyte detection unit for detecting a quantity of extracted analyte; and a control unit for obtaining a corrected analyte quantity based on the quantity of the extracted analyte and number of analyte transmission paths in the extracting region. Methods and systems for measuring analytes extracted through skin are also described.

Claims

1. A measuring device for measuring an analyte extracted through skin of a living body, comprising:

a noninvasive sampling unit for extracting the analyte from the living body through analyte transmission paths formed in an extracting region of the skin;

an analyte detection unit for detecting a quantity of extracted analyte; and

a control unit for obtaining a corrected analyte quantity based on the quantity of the extracted analyte and number of analyte transmission paths in the extracting region.

2. The measuring device of claim 1, further comprising a plurality of electrodes comprising an extracting electrode, and a power supply for applying an electric current between the electrodes, wherein the control unit obtains the number of analyte transmission paths from a current result flowing between the electrodes.

3. The measuring device of claim 2, wherein the noninvasive sampling unit comprises the extracting electrode and a holding medium for holding the extracted analyte.

4. The measuring device of claim 2, wherein the current result comprises a resistance value, a voltage value, or a current value.

5. The measuring device of claim 1, wherein the control unit compares the number of analyte transmission paths to a standard value of number of transmission paths, and obtains the corrected analyte quantity based on a comparison result.

6. The measuring device of claim 5, wherein the comparison result comprises a ratio of the number of analyte transmission paths and the standard value of number of transmission paths.

7. The measuring device of claim 1, wherein the quantity of the extracted analyte comprises a concentration of the extracted analyte and the corrected analyte quantity comprises a corrected analyte concentration.

8. The measuring device of claim 1, wherein the control unit compares analyte quantity per unit number of transmission paths to a standard value of analyte quantity per unit number of transmission paths, and obtains the corrected analyte quantity based on a comparison result.

9. The measuring device of claim 8, wherein the comparison result comprises a ratio of the analyte quantity per unit number of transmission paths and the standard value of analyte quantity per unit number of transmission paths.

10. The measuring device of claim 1, wherein the analyte comprises glucose.

11. A measuring system for measuring an analyte extracted through skin of a living body, comprising:

noninvasive sampling means for extracting the analyte from the living body through analyte transmission paths formed in an extracting region of the skin;

analyte detecting means for detecting a quantity of extracted analyte; and

control means for obtaining a corrected analyte quantity based on the quantity of the extracted analyte and number of analyte transmission paths in the extracting region.

12. A measuring device for measuring an analyte extracted through skin of a living body, comprising:

a noninvasive sampling unit for extracting the analyte from the living body through analyte transmission paths formed in an extracting region of the skin;

an analyte detecting unit for detecting a quantity of extracted analyte; and

a control unit for obtaining a corrected analyte quantity based on the quantity of the extracted analyte and an aperture area of analyte transmission paths in the extracting region.

13. The measuring device of claim 12, further comprising a plurality of electrodes comprising an extracting electrode, and a power supply for applying an electric current between the electrodes, wherein the control unit obtains the aperture area of analyte transmission paths from a current result flowing between the electrodes.

14. The measuring device of claim 13, wherein the noninvasive sampling unit comprises the extracting electrode and a holding medium for holding the extracted analyte.

15. The measuring device of claim 13, wherein the current result comprises a resistance value, a voltage value, or a current value.

16. The measuring device of claim 12, wherein the control unit compares the aperture area of analyte transmission paths to a standard value of aperture area of analyte transmission paths, and obtains the corrected analyte quantity based on a comparison result.

17. The measuring device of claim 16, wherein the comparison result comprises a ratio of the aperture area of analyte transmission paths and the standard value of aperture area of analyte transmission paths.

18. The measuring device of claim 12, wherein the quantity of the extracted analyte comprises a concentration of the extracted analyte and the corrected analyte quantity comprises a corrected analyte concentration.

19. The measuring device of claim 12, wherein the control unit compares analyte quantity per unit aperture area of transmission paths to a standard value of analyte quantity per unit aperture area of transmission paths, and obtains the corrected analyte quantity based on a comparison result.

20. The measuring device of claim 19, wherein the comparison result comprises a ratio of the analyte quantity per unit aperture area and the standard value of analyte quantity per unit aperture area.

21. The measuring-device of claim 12, wherein the analyte comprises glucose.

22. A measuring system for measuring an analyte extracted through skin of a living body, comprising:

noninvasive sampling means for extracting the analyte from the living body through analyte transmission paths formed in an extracting region of the skin;

analyte detecting means for detecting a quantity of extracted analyte; and

control means for obtaining a corrected analyte quantity based on the quantity of the extracted analyte and an aperture area of analyte transmission paths in the extracting region.

23. A measuring device for measuring an analyte extracted through skin of a living body, comprising:

a noninvasive sampling unit for extracting the analyte from the living body through analyte transmission paths formed in an extracting region of the skin, the noninvasive sampling unit comprising an extracting electrode and a holding medium for holding extracted analyte by a current flowing to the extracting electrode;

an analyte detecting unit for detecting a quantity of the extracted analyte; and

a control unit for obtaining a corrected analyte quantity based on the quantity of the extracted analyte and a current flow result.

24. The measuring device of claim 23, wherein the quantity of the extracted analyte comprises a concentration of the extracted analyte and the corrected analyte quantity comprises a corrected analyte concentration.

25. The measuring device of claim 23, wherein the current flow result comprises a resistance value.

26. The measuring device of claim 25, wherein the control unit obtains the corrected analyte quantity based on the resistance value and a standard value of the resistance.

27. The measuring device of claim 26, wherein the control unit obtains the corrected analyte quantity based on a ratio of a difference between the resistance value and an in vivo resistance value, and a difference between the standard value of the resistance and the in vivo resistance value.

28. The measuring device of claim 23, wherein a constant current flows to the extracting electrode, and the current flow result comprises a voltage value.

29. The measuring device of claim 28, wherein the control unit obtains the corrected analyte quantity based on the voltage value and a standard voltage value.

30. The measuring device of claim 23, wherein a constant voltage flows to the extracting electrode, and the current flow result comprises a current value.

31. A measuring device for measuring an analyte extracted through skin of a living body, comprising:

a sampling unit for noninvasively extracting the analyte by applying electrical energy to the skin;

a monitor unit for monitoring applied electrical energy;

a detection unit for detecting a quantity of extracted analyte; and

a control unit for obtaining a corrected analyte quantity based on the quantity of the extracted analyte and a monitor result by the monitor unit.

32. The measuring device of claim 31, wherein the monitor result comprises a resistance value, a voltage value, or a current value.

33. The measuring device of claim 31, wherein the control unit obtains the corrected analyte quantity based on the monitor result and a standard value.

34. A method for measuring an analyte extracted through skin of a living body, comprising:

noninvasively extracting the analyte through analyte transmission paths formed in an extracting region of the skin;

detecting an extracted analyte quantity; and

obtaining a corrected analyte quantity based on the extracted analyte quantity and a number of analyte transmission paths formed in the extracting region.

35. The method of claim 34, wherein the analyte is extracted by applying electrical energy to the extracting region.

36. The method of claim 35, wherein the analyte comprises glucose.

37. A method for measuring an analyte extracted through skin of a living body, comprising:

noninvasively extracting the analyte through analyte transmission paths formed in an extracting region of the skin;

detecting an extracted analyte quantity; and

obtaining a corrected analyte quantity based on the extracted analyte quantity and an aperture area of the analyte transmission paths formed in the extracting region.

38. The method of claim 37, wherein the analyte is extracted by applying electrical energy to the extracting region.

39. The method of claim 37, wherein the analyte comprises glucose.

40. A method for measuring an analyte extracted through skin of a living body, comprising:

noninvasively extracting the analyte by applying electrical energy to the skin;

monitoring applied electrical energy;

detecting an extracted analyte quantity; and

obtaining a corrected analyte quantity based on the extracted analyte quantity and a monitoring result of the applied electrical energy.

41. The method of claim 40, wherein the monitoring result comprises a resistance value, a voltage value, or a current value.

42. The method of claim 40, wherein the corrected analyte quantity is obtained based on the monitoring result and a standard value.