Patent ID: 6531097
Filing Date: 2003-03-11
Classification: A61B,G01N

Abstract:
A system for measuring the concentration of an assay substance comprising:a sensor having a sensing body including a fluorophor, which fluorophor has a fluorescent activity which is measurably altered in relation to the concentration of the assay substance and light conveying means for conveying light to and from the fluorophor; a pumping light source which, in operation, applies light to the light conveying means to activate the fluorophor; a detector for detecting light emitted by the fluorophor in the polymer body and for generating a signal in response thereto; analysing apparatus for analysing the signal generated by the detector, and calculating from that signal the concentration of the assay substance detected by the sensor; wherein the detector operates to detect transient change in light emitted by the fluorophor simultaneously with the pumping light source operating to apply light to the optical fibre.