Electrode probe and body fluid examination equipment including the same
First Claim
1. An electrode probe comprising an insulating needle member, an electrode system including a counter electrode and a working electrode disposed on the surface of said insulating needle member, a lead connected to said counter electrode, and a lead connected to said working electrode, wherein said lead connected to said working electrode is made of a linear conductive member which is finer than said needle member, said lead being partially embedded in said needle member and said conductive member protruding from the tip end of said needle member which protruding portion forms said working electrode.
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Accused Products
Abstract
Disclosed is an electrode probe and a body fluid examination equipment enabling examination of a trace amount of body fluid. The electrode probe comprises an insulating needle member, a working electrode lead disposed in the needle member, a working electrode whose lead is protruding outside from the needle member, a counter electrode disposed on the surface of the needle member, a lead connected to the counter electrode, and a reagent layer disposed in contact with or in the vicinity of the working and counter electrodes of the electrode system. When a trace amount of body fluid leaking on the skin surface is brought into contact with the reagent layer, the reagent layer dissolves which results in electron transfer whereby information about the concentration of analyte in the body fluid can be obtained from the electrode system.
149 Citations
21 Claims
- 1. An electrode probe comprising an insulating needle member, an electrode system including a counter electrode and a working electrode disposed on the surface of said insulating needle member, a lead connected to said counter electrode, and a lead connected to said working electrode, wherein said lead connected to said working electrode is made of a linear conductive member which is finer than said needle member, said lead being partially embedded in said needle member and said conductive member protruding from the tip end of said needle member which protruding portion forms said working electrode.
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3. The electrode probe in accordance with one 1, further comprising a third electrode and a lead connected thereto.
- 6. An electrode probe comprising an insulating needle member, an electrode system including a counter electrode and a working electrode disposed on the surface of said insulating needle member, a lead connected to said counter electrode, and a lead connected to said working electrode, further comprising a pit formed at the tip end of said needle member, said pit being disposed with said working electrode and said counter electrode.
- 11. An electrode probe comprising an insulating needle member, an electrode system including a counter electrode and a working electrode disposed on the surface of said insulating needle member, a lead connected to said counter electrode, and a lead connected to said working electrode, wherein said lead connected to said working electrode is made of a linear conductive member which is finer than said needle member, said lead being partially embedded in said needle member and said conductive member being protruding inside a pit present at the tip end of said needle member, which protruding portion forms said working electrode.
- 16. An electrode probe comprising an insulating needle member having a pit at its tip end, an electrode system including a counter electrode and a working electrode disposed in said pit, a lead connected to said counter electrode and a lead connected to said working electrode.
- 18. An electrode probe comprising an insulating needle member having a pit at its tip end, a counter electrode disposed in said pit, a lead connected to said counter electrode and a linear conductive member which is finer than said needle member, wherein said conductive member is partially embedded in said needle member and is protruding toward inside said pit of said needle member, which protruding portion serves as a working electrode.
- 20. A body fluid examination equipment using an electrode probe comprising an insulating needle member, an electrode system including a counter electrode and a working electrode disposed on the surface of said insulating needle member, a lead connected to said counter electrode, and a lead connected to said working electrode, the equipment comprising means for applying a voltage across the electrode system of said electrode probe and obtaining analyte information from said electrode system in the form of an electric signal, means for determining a measurement value of an analyte based on said electric signal and a body fluid leaking instrument.
Specification