Medical intervention instrument

Abstract

A grasping forcepsincludes: a pair of guide sectionsA andB that guide maneuvering wiresA andB in a direction of an axial line C of a sheath; an extending-and-retracting member (transmission section)that transmits displacement information of the maneuvering section to the maneuvering wiresA andB and outputs the displacement information to the intervention instrument; a distal direction movement inhibitor section (specific directional movement-inhibitor section)that allows the sheaths of the maneuvering wiresA andB toward the distal end; a proximal direction movement inhibitor section (specific directional movement-inhibitor section)that allows the sheaths of the maneuvering wiresA andB toward the distal end; and an locked-state-releasing sectionthat releases an engaging state of the guide sectionsA andB with the distal direction movement inhibitor sectionor the proximal direction movement inhibitor sectionbased on the displacement input by the maneuvering section. Accordingly, an medical intervention instrument can be provided that can maintain a certain attitude of the intervention instrument once established during intervention even if an external force is applied, and that can carry out identical operations simultaneously, i.e., manipulating of the intervention instrument and releasing of a certain attitude of the intervention instrument.