主权项 |
1. A stent delivery system comprising:
an inner tube; a stent which is compressed toward a center axis and disposed on a distal side of the inner tube at a time of insertion into a lumen of a living body, and which is restored to its pre-compression shape by expanding outward when put indwelling in the lumen of the living body; an outer tube disposed on an outer surface side of the inner tube and possessing a lumen containing the stent, the outer tube being axially movable in a proximal direction relative to the inner tube to release the stent to an exterior of the stent delivery system; an operating unit operatively connected to the outer tube to axially move the outer tube relative to the inner tube, the operating unit comprising:
a housing;an operation body operable by an operator;a displacement body which is mounted in the housing to axially move relative to the housing, the displacement body including a first block connected to the outer tube and a second block on which a load is exerted due to operation of the operation body by the operator, the second block being connected to the first block; anda releasing mechanism by which the connection between the first block and the second block is released so that the second block is moved relative to the first block when a load of not less than a predetermined value is applied to the second block from the operation body. |