A surgical device for injecting a chemical agent within a subject for use in endoscopic injection therapies is disclosed. The device includes a support body, a motion transmitting unit, an agent delivery system and a guide housing. The motion transmitting unit is movable relative to the support body....http://www.google.de/patents/US7727197?utm_source=gb-gplus-sharePatent US7727197 - Duodenoscope needle
