In vivo component measurement method, data processing method for in vivo component measurement, in vivo component measurement apparatus and collection member

• US 8,747,316 B2
• Filed: 01/28/2011
• Issued: 06/10/2014
• Est. Priority Date: 07/31/2008
• Status: Active Grant

• Current Assignee: Sysmex Corporation
• Original Assignee: Sysmex Corporation
• Inventors: Okada, Seiki
• Primary Examiner(s): Natnithithadha, Navin
• Assistant Examiner(s): BERHANU, ETSUB D
• Application Number:
  US13/016,088
• Publication Number:
  US 20110124998A1
• Time in Patent Office: 1,229 Days
• Field of Search: 600/316, 600/347, 600/362, 600/364, 600/365
• US Class Current: 600/365
• CPC Class Codes: A61B 2562/0295 Strip shaped analyte sensors for apparatus classified in A61B5/145 or A61B5/157 disposable multilayered or laminated electrodes G01N27/307; details of handling chemical test elements G01N33/4875
• CPC Class Codes: A61B 5/14514 using means for aiding extraction of interstitial fluid, e.g. microneedles or suction
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/1486 using enzyme electrodes, e.g. with immobilised oxidase
• CPC Class Codes: A61M 2037/0061 Methods for using microneedles
• CPC Class Codes: A61M 37/00 Other apparatus for introducing media into the body for reproduction or fertilisation A61B17/425; apparatus for iontophoresis or cataphoresis A61N1/30; Percutany, i.e. introducing medicines into the body by diffusion through the skin salt baths A61H33/04
• CPC Class Codes: A61M 37/0015 by using microneedles
• CPC Class Codes: C12Q 1/006 for glucose

Abstract

An in vivo component measurement method allowing how long a high concentration state of a measurement target component continues in an organism to be grasped is provided. In this in vivo component measurement method, a value relating to an amount of a measurement target component in tissue fluid extracted for 60 minutes or more from an organism on which a treatment for enhancing extraction of tissue fluid has been made is acquired.

Claims

1. An in vivo component measurement method, comprising:

preparing tissue fluid extracted for an extract time of 60 minutes or more from an organism on which a treatment for enhancing extraction of tissue fluid has been made;

acquiring, using a detection portion of an in vivo component measurement apparatus, a value relating to an amount of a measurement target component in the extracted tissue fluid;

acquiring a value relating to an amount of an electrolyte contained in the extracted tissue fluid; and

acquiring, using an analysis portion of the in vivo component measurement apparatus, a value corresponding to an area under the curve (AUC) of a blood concentration time curve of the measurement target component corresponding to the extraction time of 60 minutes or more based on the value relating to the amount of the measurement target component, the value relating to the amount of the electrolyte, and the extraction time of 60 minutes or more.

2. The in vivo component measurement method according to claim 1, wherein

the treatment is made by forming fine pores on a skin of the organism, and

the extraction is performed through the skin where the fine pores are formed.

3. The in vivo component measurement method according to claim 1, wherein

the extraction is performed by extracting tissue fluid to an extraction medium containing a hypertonic aqueous solution having a higher osmotic pressure than pure water.

4. The in vivo component measurement method according to claim 3, wherein

the hypertonic aqueous solution contains an auxiliary component different from the measurement target component, the auxiliary component being contained with the measurement target component in the tissue fluid.

5. The in vivo component measurement method according to claim 4, wherein

the auxiliary component is at least one selected from a group consisting of kalium chloride, glycine and urea.

6. The in vivo component measurement method according to claim 5, wherein

the auxiliary component is contained in a concentration of 0.2 mmol/L or more in the hypertonic aqueous solution.

7. The in vivo component measurement method according to claim 1, wherein

the extraction time is 120 minutes or more.

8. The in vivo component measurement method according to claim 1, wherein

the extraction time is 180 minutes or more.

9. The in vivo component measurement method according to claim 1, wherein

the measurement target component is glucose.

10. The in vivo component measurement method according to claim 1, further comprising acquiring a value obtained by dividing the value corresponding to the AUC of the measurement target component by the extraction time.

11. The in vivo component measurement method according to claim 1, further comprising informing a subject of an end of extraction when the extraction time of 60 minutes or more elapses from a start of extraction of the tissue fluid.

12. An in vivo component measurement apparatus, comprising:

a set portion for setting a collection member accumulating tissue fluid extracted for an extraction time of 60 minutes or more from an organism on which a treatment for enhancing extraction of tissue fluid has been made;

a detection portion for acquiring a value relating to an amount of a measurement target component contained in the tissue fluid accumulated by the collection member set on the set portion and a value relating to an amount of an electrolyte contained in the tissue fluid accumulated by the collection member set on the set portion; and

an analysis portion acquiring a value corresponding to an area under the curve (AUC) of a blood concentration time curve of the measurement target component corresponding to the extraction time of 60 minutes or more based on the value relating to the amount of the measurement target component, the value relating to the amount of the electrolyte, and the extraction time of 60 minutes or more.

13. The in vivo component measurement apparatus according to claim 12, wherein

the extraction time is 120 minutes or more.

14. The in vivo component measurement apparatus according to claim 12, wherein

the extraction time is 180 minutes or more.

15. The in vivo component measurement apparatus according to claim 12, wherein

the measurement target component is glucose.

16. A data processing method for in vivo component measurement, comprising:

acquiring a value relating to an amount of a measurement target component in tissue fluid extracted for an extraction time of 60 minutes or more from an organism on which a treatment for enhancing extraction of tissue fluid has been made;

acquiring, using a detection portion of an in vivo component measurement apparatus, a value relating to an amount of an electrolyte contained in the extracted tissue fluid; and

acquiring, using an analysis portion of the in vivo component measurement apparatus, a value corresponding to an area under the curve (AUC) of a blood concentration time curve of the measurement target component corresponding to the extraction time of 60 minutes or more based on the value relating to the amount of the measurement target component, the value relating to the amount of the electrolyte, and the extraction time of 60 minutes or more.

17. The data processing method for in vivo component measurement according to claim 16, wherein the extraction time is 120 minutes or more.

18. The data processing method for in vivo component measurement according to claim 16, wherein

the extraction time is 180 minutes or more.

19. The data processing method for in vivo component measurement according to claim 16, wherein

the measurement target component is glucose.