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Abstract

Method and electrode assemblies for using or installing an electrode (especially enzyme electrode) in vivo, in which a protecting medium is introduced at the installation site to suppress adverse effects on the electrode's output. The medium is preferably an isotonic solution (e.g. saline) and/or a buffer solution and/or an anti-coagulant, and may be of increased viscosity (e.g. a gel or hydrogel), and may be coated on the electrode assembly. The preferred electrode assembly is a needle within a trocar cannula, preferably with the needle tip set back to form a recess to contain gelled medium which can then be fed with liquid medium. The assembly can be made as a sterilised, sealed pack bearing calibration and/or other data relevant to its use, especially in machine-readable form.

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First Claim