A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
A61B 5/145 (2006.01) A61B 5/05 (2006.01)
Patent
CA 2639143
The invention relates to a measuring system for in vivo monitoring of an analyte concentration having an electrode system comprising a work electrode (1), a reference electrode (2) and a counter electrode (3) and a potentiostat (4) for adjusting a difference of potential between the electric potential of the work electrode (1) and the electric potential of the reference electrode (2) to a specified value and for detecting the current flow between the work electrode (1) and the counter electrode (3), the potentiostat (4) comprising a work electrode terminal (15) for connection to the work electrode (1), a reference electrode terminal (19) for connection to the reference electrode (2) and a counter electrode terminal (16) for connection to the counter electrode (3). According to the invention there is provided an evaluation unit (9) which monitors the electric potential (U CE) of the counter electrode (3) and which generates a malfunction signal when said potential comes to lie outside a specified reference range. The invention further relates to a method for detecting malfunctions of a measuring system for in vivo measurement of an analyte concentration using three electrodes (1, 2, 3), where the electric potential (U CE) between the work electrode (1) and the counter electrode (3) is monitored and evaluated according to the invention for detecting malfunctions of the measuring system.
Marquant Michael
Wieder Herbert
F. Hoffmann-La Roche Ag
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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