The present invention includes methods and apparatus for continuous glucose monitoring of a patient. In one aspect a glucose monitor includes a plurality of substantially cylindrical tissue piercing elements adapted to pierce the stratum corneum and enter the epidermis, allowing for the diffusion of...http://www.google.co.uk/patents/US20080154107?utm_source=gb-gplus-sharePatent US20080154107 - Device, systems, methods and tools for continuous glucose monitoring