Membrane systems incorporating silicone polymers are described for use in implantable analyte sensors. Some layers of the membrane system may comprise a blend of a silicone polymer with a hydrophilic polymer, for example, a triblock poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) polymer....http://www.google.co.uk/patents/US8064977?utm_source=gb-gplus-sharePatent US8064977 - Silicone based membranes for use in implantable glucose sensors
