This invention is an implantable sensor and system capable of measuring, controlling, monitoring and reporting blood constituent levels. The implantable sensor for sensing in vivo the level of at least one blood constituent in mammalian vascular tissue having at least one source of radiation from infrared...http://www.google.de/patents/US6122536?utm_source=gb-gplus-sharePatent US6122536 - Implantable sensor and system for measurement and control of blood constituent levels
