Patent ID: 8282575
Filing Date: 2012-10-09
Classification: A61B

Abstract:
1. An endoscopic puncture needle comprising: a sheath having flexibility; a hollow outer needle which is movable along an axial direction of the sheath in the sheath and whose distal end is retractable with respect to a distal end of the sheath; an inner needle which moves along the axial direction of the sheath in the outer needle and is retractable with respect to the distal end of the outer needle; an outer needle moving mechanism_for moving the outer needle with respect to the sheath; an inner needle moving mechanism for moving the inner needle with respect to the outer needle; an operation portion which is arranged at a proximal end portion of the sheath and operates the outer needle moving mechanism and the inner needle moving mechanism; a duct which runs through an inner space of the outer needle and an inner space of the outer needle moving mechanism and communicates with the operation portion; and a packing material which air-tightly holds the duct at all times; wherein the packing material includes: