Patent ID: 7601153
Filing Date: 2009-10-13
Classification: A61B

Abstract:
1. An intramedullary nail for intramedullar insertion into a bone, having a nail body comprising an axial hole extending from an opening formed at a proximal end portion toward a distal end portion along an axis line and a transverse hole intersecting with the axis line, comprising: an engaging member comprising an engaging portion at distal end thereof engageable with a bone fastener inserted through the transverse hole and arranged so as to be shiftable in the axial hole such that the engaging portion is engageable and disengageable with the bone fastener; an adjusting member controlling the position of the engaging member from a side of the proximal end portion according to the operation thereof; and an elastic member for biasing the engaging member to the proximal end portion side in the axis direction against the nail body, and which is arranged between an outer circumferential step provided at the outer circumference of the engaging member and an inner step provided inside the axial hole of the nail body, whereby a first condition in which the engaging member engages with the bone fastener, by displacement of the engaging member to a side of the distal end portion in the axial direction against the biasing of the elastic member, and a second condition in which the engaging member does not engage with the bone fastener, by displacement of the engaging member to the side of the proximal end portion in the axial direction under the biasing of the elastic member, are selected by operation of the adjusting member.