| 摘要 |
<p>The needle for an endoscope includes: a wire for driving a hollow needle accommodated in a tube and having a side hole so as to be protruded from the distal end of the tube and retracted thereinto; a ferrule member, attached to the proximal end of the tube, for supplying a fluid from the distal end of the hollow needle via the tube; a first fluid-tight member, provided at the distal end side from the side hole of the hollow needle, for keeping the outer circumferential surface of the hollow needle and the inner wall of the outer sheath tube fluid-tight; and a second fluid-tight member for keeping the inner wall of the ferrule portion and the wire fluid-tight, and further includes blocking device consisting of a sealing member provided at an intermediate part of the wire, and an orifice for opening and shutting off circulation of a fluid between the ferrule member, in which the sealing member is inserted, and the hollow needle in line with extension of the hollow needle from the distal end of the outer sheath tube and retraction of the same thereinto.</p> |
