SYSTEM FOR DETERMINING A CONCENTRATION OF A SUBSTANCE IN A BODY FLUID
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United States of America Patent
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Issued Date -
May 26, 2011
app pub date -
Mar 31, 2009
filing date -
Mar 31, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A system (1) for optically determining a concentration of a substance of interest, e.g. glucose, in a body fluid. The system (1) comprises a probe head (2) adapted to be positioned in direct contact with a body fluid to be analysed, e.g. subcutaneously, in a blood vessel or in direct contact with a sample. The probe head (2) defines an analysis volume (5) which is at least partly delimited towards the body fluid by a semi-permeable membrane (6) allowing substances of interest to enter the analysis volume (5). The system (1) further comprises first light guiding means (7) arranged for guiding primary light (9) to the analysis volume (5), and second light guiding means (8) arranged for guiding secondary light (11) away from the analysis volume (5). The primary light (9) is scattered, preferably Raman scattered, and the scattered spectrum is used for determining the concentration of the substance of interest.
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