A percutaneous tower for the orthopedic procedures. The tower can include an outer elongated member, an inner elongated member received within the outer elongated member, a release actuator operable to move the inner elongated member relative to the outer elongated member between first and second positions,...http://www.google.es/patents/US8038699?utm_source=gb-gplus-sharePatente US8038699 - Percutaneous instrument assembly
