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Implantable biosensor system, apparatus and method

  • US 6,965,791 B1
  • Filed: 03/26/2003
  • Issued: 11/15/2005
  • Est. Priority Date: 03/26/2003
  • Status: Expired due to Fees
First Claim
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1. An implantable needle-type biosensor wherein an electric signal is produced between first and second electrical contacts responsive to an electrochemical reaction in a body, said biosensor comprising:

  • an elongate core comprising a plurality of axially oriented fibers, said elongate core having a distal end and a proximal end, said distal end being spaced apart in an axial direction from said proximal end;

    a working electrode associated with said distal end;

    a reference electrode spaced apart from said working electrode;

    structure adapted to resist direct physical contact between said working electrode and said reference electrode;

    a first electrically conductive path between said working electrode and said first electrical contact; and

    a second electrically conductive path between said reference electrode and said second electrical contact, wherein said distal end of said core carries a plug structured to resist extraction of said core from within a portion of said working electrode as said biosensor is removed from said body, to resist leaving a detached portion of said working electrode in the body.

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