The invention relates to a system for withdrawing body fluid from a body part via a withdrawal site located on the surface of the body part, with at least one sensor for detecting at least one variable dependent on the location or state of the withdrawal site, and with an evaluation unit for evaluating...http://www.google.fr/patents/US8062274?utm_source=gb-gplus-shareBrevet US8062274 - System for withdrawing body fluid
