Analyzer and analyzing method

• US 20070232875A1
• Filed: 03/30/2007
• Published: 10/04/2007
• Est. Priority Date: 03/30/2006
• Status: Abandoned Application

• Current Assignee: Sysmex Corporation
• Original Assignee: Sysmex Corporation
• Inventors: Sato, Toshiyuki, Maekawa, Yasunori, Okada, Seiki, Hagino, Kei, Asakura, Yoshihiro, Ohnishi, Yasuhito, Sawa, Kenichi
• Application Number:
  US11/731,441
• Publication Number:
  US 20070232875A1
• Time in Patent Office: Days
• US Class Current: 600/345
• 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

Abstract

The present invention is to present an analyzer for analyzing a concentration of a predetermined component contained in tissue fluid of a subject, the analyzer being capable of mitigating the pain of the subject. The analyzer comprises: an extraction medium retainer for retaining an extraction medium for holding tissue fluid extracted through a skin of a subject; a component amount information obtainer for obtaining component amount information regarding amount of a predetermined component contained in the tissue fluid held in the extraction medium; an electrical information obtainer for obtaining electrical information related to amount of the extracted tissue fluid by supplying electrical power to the extraction medium which is holding the extracted tissue fluid; and a component concentration obtainer for obtaining a concentration of the predetermined component contained in body fluid of the subject based on the component amount information and the electrical information.

Claims

1. An analyzer, comprising:

an extraction medium retainer for retaining an extraction medium for holding tissue fluid extracted through a skin of a subject;

a component amount information obtainer for obtaining component amount information regarding amount of a predetermined component contained in the tissue fluid held in the extraction medium;

an electrical information obtainer for obtaining electrical information related to amount of the extracted tissue fluid by supplying electrical power to the extraction medium which is holding the extracted tissue fluid; and

a component concentration obtainer for obtaining a concentration of the predetermined component contained in body fluid of the subject based on the component amount information and the electrical information.

2. The analyzer of claim 1, wherein the body fluid is selected from tissue fluid and blood.

3. The analyzer of claim 1, wherein

the electrical information reflects the degree of tissue fluid permeation through the skin.

4. The analyzer of claim 1, wherein

the electrical information relates to electrical conductance or electrical resistance of the extraction medium that is holding extracted tissue fluid.

5. The analyzer of claim 1, wherein

the electrical information relates to an electrical current or a voltage applied to the extraction medium holding the extracted tissue fluid.

6. The analyzer of claim 1,

wherein the electrical information obtainer comprises a first electrode, a second electrode, and an electrical power supplier for applying an electrical current between the first electrode and the second electrode,

and wherein the first electrode and the second electrode are disposed so as to contact with the extraction medium retained by the extraction medium retainer.

7. The analyzer of claim 6,

wherein the electrical information obtainer further comprises a third electrode electrically connected to the electrical power supplier,

wherein the third electrode and at least one of the first electrode and second electrode are electrically connected to the skin of the subject when the analyzer is attached to the skin of the subject,

and wherein the electrical power supplier applies an electrical current between the third electrode and the at least one of the first electrode and second electrode to extract the tissue fluid into the extraction medium.

8. The analyzer of claim 7,

wherein the electrical information obtainer obtains a second electrical information by applying an electrical current between the third electrode and at least one of the first electrode and second electrode,

and wherein the component concentration obtainer obtains the concentration of the predetermined component contained in the body fluid of the subject based on the second electrical information, the electrical information, and the component amount information.

9. The analyzer of claim 1, wherein

the extraction medium retained by the extraction medium retainer is non-conductive.

10. The analyzer of claim 9, wherein

the extraction medium is water.

11. The analyzer of claim 1, wherein

the component amount information indicates amount of the predetermined component extracted into the extraction medium per unit time.

12. The analyzer of claim 1, wherein

the predetermined component is glucose.

13. The analyzer of claim 12, wherein

the concentration of the predetermined component contained in the body fluid of the subject is a blood glucose level.

14. The analyzer of claim 1, further comprising

a display for displaying the electrical information.

20. The analyzer of claim 1, further comprising

a third electrode electrically connected to the electrical power supplier,

wherein the third electrode and at least one of the first electrode and second electrode are electrically connected to the skin of the subject when the analyzer is attached to the skin of the subject,

wherein the electrical power supplier applies an electrical current between the third electrode and the at least one of the first electrode and second electrode to extract the tissue fluid into the extraction medium,

and wherein the second detector detects the electrical information when the electrical power supplier applies an electrical current between the first electrode and the second electrode.

15. An analyzer, comprising:

a first electrode;

a second electrode;

an extraction medium retainer for retaining an extraction medium for holding tissue fluid extracted through the skin of a subject, the extraction medium contacting with the first electrode and the second electrode;

an electrical power supplier for applying an electrical current between the first electrode and the second electrode;

a first detector for detecting amount of a predetermined component contained in the tissue fluid held in the extraction medium;

a second detector for detecting electrical information related to supply of electricity from the electrical power supplier; and

a component concentration obtainer for obtaining a concentration of the predetermined component contained in body fluid of the subject based on the amount of the predetermined component detected by the first detector and the electrical information detected by the second detector.

16. The analyzer of claim 15, wherein

the electrical information relates to a voltage applied between the first electrode and the second electrode.

17. The analyzer of claim 16, wherein

the electrical power supplier is a constant current power supplier.

18. The analyzer of claim 15, wherein

the electrical information relates to the electrical current applied between the first electrode and the second electrode.

19. The analyzer of claim 18, wherein

the electrical power supplier is a constant voltage power supplier.

21. An analyzing method, comprising steps of

(a) extracting tissue fluid through the skin of a subject into an extraction medium for holding the extracted tissue fluid;

(b) obtaining component amount information regarding amount of a predetermined component contained in the tissue fluid held in the extraction medium;

(c) obtaining electrical information related to amount of the extracted tissue fluid by supplying electrical power to the extraction medium which is holding the extracted tissue fluid; and

(d) obtaining a concentration of the predetermined component contained in body fluid of the subject based on the component amount information and the electrical information.