Electrochemical biosensors consisting of two or more needle-shaped electrodes for monitoring of molecules such as glucose in the subcutaneous tissue are provided. The two electrodes are parallel to each other, and are fixed perpendicularly to the planar side of a sensor base which provides skin fixation...http://www.google.com.au/patents/US20080033269?utm_source=gb-gplus-sharePatent US20080033269 - Catheter-free implantable needle biosensor
