A rotatable surgical instrument for use alone or in conjunction with other instruments such as an endoscope. The instrument, having a proximal end and a distal end, includes a proximal actuator assembly, a distal end effector assembly having a surgical tool and a first rotational engagement member, a...http://www.google.de/patents/US6027522?utm_source=gb-gplus-sharePatent US6027522 - Surgical instrument with a rotatable distal end
