Patent ID: 6965791

Claim:
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.