A retractor blade mounts on a shaft having a controlled degree of rotation and swings down to grip and retract tissue from bone or a hard tissue structure. The retractor blade includes a blade portion and a handle portion which may be integrally joined or may fit together in a modular way to allow different...http://www.google.es/patents/US6241659?utm_source=gb-gplus-sharePatente US6241659 - Surgical retractor assembly with controlled rotation
Surgical retractor assembly with controlled rotation
