A method is provided for the determination of the concentration of compounds in body tissue and fluids. The method utilises two compartments containing reference solutions, which are separated from the sample by two different semi-permeable membranes, in a serial manner, whereby a difference in osmotic...http://www.google.ca/patents/US20050154272?utm_source=gb-gplus-sharePatent US20050154272 - Method and device for monitoring analyte concentration by use of differential osmotic pressure measurement
