These and other objects of the present invention are achieved in a body fluid sampling system for use on a tissue site that includes an electrically powered drive force generator. A penetrating member is operatively coupled to the force generator. The force generator moves the member along a path out...http://www.google.com.hk/patents/US20080119761?utm_source=gb-gplus-share專利 US20080119761 - METHOD AND APPARATUS FOR PENETRATING TISSUE
