IN VIVO COMPONENT MEASUREMENT METHOD AND IN VIVO COMPONENT MEASUREMENT APPARATUS

• US 20100160758A1
• Filed: 12/22/2009
• Published: 06/24/2010
• Est. Priority Date: 12/22/2008
• Status: Abandoned Application

• Current Assignee: Sysmex Corporation
• Original Assignee: Sysmex Corporation
• Inventors: SATO, Toshiyuki, HAGINO, Kei, KOJIMA, Junko, KIKKAWA, Yasuo, OKADA, Seiki, ASAKURA, Yoshihiro
• Application Number:
  US12/645,080
• Publication Number:
  US 20100160758A1
• Time in Patent Office: Days
• 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 5/14865 invasive, e.g. introduced into the body by a catheter or needle or using implanted sensors
• CPC Class Codes: A61B 5/7242 using integration

Abstract

An in vivo component measurement method comprises steps of: extracting a tissue fluid from a biological body into an extraction medium and accumulating an objective component and an inorganic ion in the extracted tissue fluid; acquiring ion information on a quantity of the accumulated inorganic ion; acquiring a component information on a quantity of the accumulated objective component; and acquiring an analysis value on the quantity of the objective component based on the ion information and the component information.

Claims

1. An in vivo component measurement method comprising steps of:

extracting a tissue fluid from a biological body into an extraction medium and accumulating an objective component and an inorganic ion in the extracted tissue fluid;

acquiring ion information on a quantity of the accumulated inorganic ion;

acquiring a component information on a quantity of the accumulated objective component;

acquiring an analysis value on the quantity of the component based on the ion information and the component information.

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

wherein the ion information is a concentration of the inorganic ion.

3. The in vivo component measurement method according to claim 1, further comprising:

a step of forming fine pores on a skin of the biological body so as to enhance the extraction of the tissue fluid from the biological body,

wherein the tissue fluid is extracted through the skin where the fine pores are formed.

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

wherein the objective component is glucose.

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

wherein the analysis value on the quantity of the objective component corresponds to an area under blood concentration time curve of the objective component.

6. The in vivo component measurement method according to claim 1, further comprising a step of informing end of extraction at predetermined time.

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

wherein the predetermined time is 60 minutes or more.

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

wherein the predetermined time is 180 minutes or more.

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

wherein the inorganic ion is sodium ion, potassium ion or chloride ion.

10. An in vivo component measurement apparatus comprising:

a setting unit for setting a collection member capable of accumulating an objective component and an inorganic ion contained in a tissue fluid extracted from a biological body;

a detection unit for acquiring a component information on a quantity of the objective component and an ion information on a quantity of the inorganic ion, which are accumulated by the collection member set in the setting unit; and

an analysis unit for acquiring an analysis value on the quantity of the objective component based on the ion information and the component information.

11. The in vivo component measurement apparatus according to claim 10,

wherein the ion information is a concentration of the inorganic ion.

12. The in vivo component measurement apparatus according to claim 10,

wherein the collection member is configured for accumulating the objective component and the inorganic ion in the tissue fluid which has been extracted for 60 minutes or more.

13. The in vivo component measurement apparatus according to claim 10,

wherein the collection member is configured for accumulating the objective component and the inorganic ion in the tissue fluid which has been extracted for 180 minutes or more.

14. The in vivo component measurement apparatus according to claim 10,

wherein the objective component is glucose.

15. The in vivo component measurement apparatus according to claim 10, further comprising:

a time information unit for informing that specific time of 60 minutes or more passes after start of the extraction of the tissue fluid.

16. The in vivo component measurement apparatus according to claim 10,

wherein the detection unit includes a first detection unit for acquiring the component information on the quantity of the objective component and a second detection unit for acquiring the ion information on the quantity of the inorganic ion.

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

wherein the detection unit includes a glucose concentration measurement electrode having a work electrode with a glucose oxidase enzyme membrane formed on a platinum electrode and a counter electrode formed of a platinum electrode.

18. The in vivo component measurement apparatus according to claim 11,

wherein the detection unit includes an ion concentration measurement electrode having an ion selective electrode made of silver/silver chloride and has a selection membrane for inorganic ion, and a counter electrode formed of silver/silver chloride.

19. The in vivo component measurement apparatus according to claim 10,

wherein the inorganic ion is sodium ion, potassium ion or chloride ion.

20. The in vivo component measurement apparatus comprising:

an introduction portion for introducing a sample including an objective component and an inorganic ion contained in a tissue fluid extracted from a biological body,

a detection unit for acquiring a component information on a quantity of the objective component and an ion information on a quantity of the inorganic ion, which are contained in the sample introduced into the introduction portion; and

an analysis unit for acquiring an analysis value on the quantity of the objective component based on the ion information and the component information detected in the detection unit.