A method and apparatus for enhancing the integrity of an implantable sensor. Voids formed between an outer tubing and a sensor substrate or spacing element may be back-filled with a curable, implantable material, minimizing the extent to which unwanted fluids diffuse within the sensor. An enzyme or protein...http://www.google.com.au/patents/US20040064156?utm_source=gb-gplus-sharePatent US20040064156 - Method and apparatus for enhancing the integrity of an implantable sensor device