The treatment implement for endoscopes

Japanese Patent JP5911652

B2

A treatment tool for an endoscope includes a sheath; a pre-curved portion which is provided at a distal portion of the sheath, and has a restoring force to restore to a curved shape in which the sheath is bent along a virtual plane including the center axis of the sheath; a knife wire lumen which has a center axis at a position spaced from the virtual plane at the distal portion of the pre-curved portion, and is formed along the center axis of the sheath; a first communication hole which is open in a direction outwardly away from the position of the knife wire lumen in a radial direction with respect to the center axis of the sheath, and communicates an outer circumferential surface positioned at an inward side of the curved shape of the pre-curved portion with the knife wire lumen; a second communication hole which is open in a direction outwardly away from the position of the knife wire lumen in the radial direction with respect to the center axis of the sheath, and communicates the outer circumferential surface positioned at the inward side of the curved shape of the pre-curved portion with the knife wire lumen at a more proximal position of the pre-curved portion than the first communication hole; a wire-shaped cutting portion which protrudes from the first communication hole and the second communication hole and extends between the first communication hole and the second communication hole, the cutting portion being capable of incising tissues; a fixing portion which is provided at a distal end portion of the cutting portion, and provided to fix the cutting portion and the knife wire lumen in a state that the fixing portion is inserted into the knife wire lumen; a guide wire accommodation portion which is formed along a longitudinal axis of the sheath at a position spaced from the knife wire lumen in a circumferential direction around the center axis of the sheath, and into which a guide wire is capable of being inserted; a proximal slit portion which is formed to communicate the guide wire accommodation portion and the outer circumferential surface of the sheath in a region more proximal than a proximal end of the pre-curved portion; a distal slit portion which is formed to communicate an outer circumferential surface at an outward side of the curved shape of the pre-curved portion with the guide wire accommodation portion in a region between the proximal end of the pre-curved portion to an intermediate portion of the pre-curved portion in a direction toward a distal end side of the pre-curved portion; and a high-rigidity region which extends from a distal end of the sheath to a distal end of the distal slit portion, and has a higher torsional rigidity than that of a region more proximal than the proximal end of the pre-curved portion.

Tsukasa Kobayashi
Yuji Sakamoto
Hiroyuki Morishita

JP2015546356A

April 27, 2016

March 02, 2015

Click for automatic bibliography generation  

Olympus Endo Technology America Inc.

A61B18/12

JPH04364836A	1992-12-17
JP2001070316A	2001-03-21
JP2002136593A	2002-05-14
JP2002035003A	2002-02-05
JP2009045451A	2009-03-05
JP2000262537A	2000-09-26
JPS55180502U	1980-12-25
JP2002514099A	2002-05-14
JPH04364836A	1992-12-17
JP2001070316A	2001-03-21
JP2002136593A	2002-05-14
JP2002035003A	2002-02-05
JP2009045451A	2009-03-05
JP2000262537A	2000-09-26
JPS55180502U	1980-12-25
JP2002514099A	2002-05-14

WO2014050233A1	2014-04-03
WO2014050233A1	2014-04-03

Sumio Tanai
Masatake Shiga
Suzuki Mitsuyoshi
Tadao Takashiba
Shiro Suzuki
Hiroyuki Hashimoto

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