The present invention provides an endoscopic accessory control system that resides externally of the endoscope. The system comprises the endoscopic accessory with a working end to be placed at the distal end of the endoscope, a control sheath extending proximally external to the endoscope and a control...http://www.google.es/patents/US7717846?utm_source=gb-gplus-sharePatente US7717846 - External endoscopic accessory control system
