JP2009279372A - Treatment tool for endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a treatment tool for endoscopes which facilitates injection of a solution regardless of rotation of a flexible sheath and facilitates the rotation of the flexible sheath regardless of a procedure for the injection of a solution. <P>SOLUTION: The tool for an endoscope has a construction in which an operation part 10 is connected to the basement end of a flexible sheath 1 to insert into or draw out of a guide tube for the treatment tool, wherein a solution injection opening 14, through which a solution is injected from the basement end into the flexible sheath 1, is rotatably disposed around an axis for the basement end part 16 of the flexible sheath 1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an endoscope treatment tool.

An endoscope treatment tool generally has a configuration in which an operation unit is connected to a proximal end of a flexible sheath that is inserted into and removed from an endoscope treatment tool guide tube. Many of the flexible sheaths are provided with a liquid injection port for injecting a liquid from the proximal end side so that a contrast medium, a chemical solution, or the like can be delivered into the body (for example, Patent Documents 1 and 2). .
JP-A-5-68685 JP 2008-73378 A

  When operating the endoscope treatment tool, it is often necessary to adjust the direction (rotation direction) of the distal end of the flexible sheath from the hand side in accordance with the state of the affected part in the body. However, if the flexible sheath is rotated around the axis from the base end side for that purpose, the liquid injection port rotates with it, so that the liquid injection port may turn to the direction where the liquid injection operation is extremely difficult. is there. In addition, when the liquid injection tool is connected to the liquid injection port, the liquid injection tool is swung with the rotation of the flexible sheath, which makes it difficult to rotate the flexible sheath. It was.

  The present invention has been made to solve such a problem. The liquid injection operation can be easily performed regardless of the rotation operation of the flexible sheath, and can be performed regardless of the procedure of the liquid injection operation. It is an object of the present invention to provide an endoscopic treatment tool capable of easily performing a rotation operation of a flexible sheath.

In an endoscope treatment instrument having a configuration in which an operation unit is connected to a proximal end of a flexible sheath that is inserted into and removed from a treatment instrument guide tube of an endoscope, liquid is introduced into the flexible sheath from the proximal end side. A liquid injection port for injection was disposed so as to be rotatable around the axis of the proximal end portion of the flexible sheath.
An outer cylinder member surrounding a cylindrical sheath base end cap constituting the base end portion of the flexible sheath is disposed so as to be rotatable about an axis with respect to the sheath base end cap, and the liquid injection port is an outer cylinder member. May be formed so as to protrude from the side surface of the outer tube member to the side thereof, and a through hole is formed in the sheath base end cap for connecting the inner space of the outer cylinder member communicating with the liquid injection port and the inner space of the sheath base end cap. May be. And the annular seal member for watertightly sealing between the inner peripheral surface of an outer cylinder member and the outer peripheral surface of a sheath base end cap may be provided in the front-and-rear both ends vicinity of an outer cylinder member.

  Further, the liquid injection port may be arranged so as to be rotatable about the axis with respect to the proximal end portion of the flexible sheath and also to be rotatable with respect to the operation portion, and the proximal end portion of the flexible sheath is operated. You may connect so that it cannot rotate to the surroundings of an axis | shaft with respect to the part. In addition, a conductive operation wire through which a high-frequency current is passed may be inserted and disposed throughout the entire length of the flexible sheath. The flexible sheath may be configured by covering a metal coil pipe with a flexible tube, or may be configured only by the flexible tube.

  According to the endoscope treatment tool of the present invention, the liquid injection port for injecting the liquid from the proximal end side into the flexible sheath is rotatably arranged around the axis of the proximal end portion of the flexible sheath. As a result, the injection operation can be easily performed by directing the injection port in an arbitrary direction regardless of the rotation operation of the flexible sheath, and even if the injection device is connected to the injection port Since it is not swung, the flexible sheath can be easily rotated regardless of the procedure of the liquid injection operation.

Embodiments of the present invention will be specifically described below with reference to the drawings.
FIG. 2 shows the overall configuration of the endoscope treatment tool. Reference numeral 1 denotes a flexible sheath that is inserted into and removed from a treatment instrument guide tube of an endoscope (not shown), and an operation wire 2 that is passed through the entire length of the flexible sheath 1 is passed through the flexible sheath 1. A pair of tip electrodes 3 movably disposed at the tip of the flexible sheath 1 are opened and closed by moving forward and backward from the operation unit 10 connected to the end. However, the tip electrode 3 may be of a type that performs an operation other than the opening / closing operation.

  The rear end portion of the flexible sheath 1 is connected to the distal end portion of the operation portion main body 11 made of an electrical insulating material constituting the operation portion 10 having no exposed metal portion in a portion that may be directly touched by hand. 1z is arranged so as to surround the vicinity of the rear end of the flexible sheath 1 in order to prevent the rear end portion of the flexible sheath 1 from being suddenly bent and damaged in the vicinity of the connecting portion with the operation unit main body 11. It is a bend prevention tube made of an electrical insulating material. The slide operation member 12 to which the rear end of the operation wire 2 is connected is slidably disposed along the operation unit main body 11 and can be moved by moving the slide operation member 12 back and forth as indicated by an arrow X. The operation wire 2 advances and retreats within the flexible sheath 1, and the tip electrode 3 can be opened and closed at the tip of the flexible sheath 1 as indicated by an arrow Y. In the operation unit 10, a reinforcing pipe 9 made of stainless steel pipe is covered with the operation wire 2 so that the operation wire 2 does not buckle during the pushing operation.

  Reference numeral 13 denotes a power cord connecting terminal disposed on the slide operation member 12 for connecting the high frequency power cord. By connecting the high frequency power cord to the power cord connecting terminal 13, the tip electrode is connected via the operation wire 2. 3 can be energized with a high-frequency current. Reference numeral 14 denotes a liquid injection port for injecting a liquid into the flexible sheath 1 from the proximal end side. For example, a liquid injection tool T such as a syringe can be arbitrarily connected. The liquid injection port 14 is formed integrally with an outer cylinder member 15 (described later) disposed at the proximal end portion of the flexible sheath 1 so as to be rotatable around the axis.

  FIG. 3 shows the distal end portion of the flexible sheath 1. The flexible sheath 1 is configured by covering an outer surface of a coil pipe 1A, in which a stainless steel wire is tightly wound with a constant diameter, with an outer skin 1B made of an electrically insulating flexible tube or the like over the entire range. The liquid can be passed from the proximal end side to the distal end side without leaking on the way. A substantially cylindrical tip 1C made of a conductive metal material is integrally attached to the tip of the coil pipe 1A by silver brazing or welding, and the tip cap 1C is a support frame 4 made of a conductive metal material. And is rotatably engaged around the central axis. However, the tip cap 1C may be fixed to the support frame 4 (or the coil pipe 1A is directly fixed to the support frame 4). Further, in this embodiment, the outer skin 1B is fixedly covered with respect to the coil pipe 1A, but it may be covered with the coil pipe 1A so as to be relatively rotatable around the central axis.

  A pair of tip electrodes 3 made of a conductive metal material is attached to the tips of the support frame 4 so as to be openable and closable around a support shaft 5 made of a conductive metal material. However, they are electrically connected via the tip cap 1C, the support frame 4, the support shaft 5, and the like. When the operation wire 2 moves forward and backward by an operation from the operation unit 10 side, the tip electrode 3 is driven to open and close by the operation of the link mechanism 6 connected to the tip of the operation wire 2.

  FIG. 1 shows the vicinity of the liquid injection port 14 arranged at the connecting portion between the proximal end of the flexible sheath 1 and the distal end of the operation portion 10. A cylindrical sheath base end cap 16 constituting the base end portion of the flexible sheath 1 is straightly connected and fixed to the rear end of the coil pipe 1A. The rear end portion of the sheath base end cap 16 is As shown in FIG. 4, which is a cross-sectional view taken along the line A, the flexible sheath 1 is connected by a key coupling K or the like so that it cannot rotate relative to the operation unit main body 11. The main body 11 is integrally connected.

  The outer cylinder member 15 formed integrally with the liquid injection port 14 in a substantially cylindrical shape (the liquid injection port 14 is integrally formed protruding from the side surface of the outer cylinder member 15 toward the side thereof) is a sheath base end port. A shaft is secured by a retaining nut 20 that is disposed around the sheath base end cap 16 so as to be rotatable around the central axis of the gold 16 and is fixed to the sheath base end cap 16 by screwing (or fitting). Movement in the direction is restricted. Therefore, the liquid injection port 14 and the outer cylinder member 15 cannot move in the axial direction with respect to the flexible sheath 1 and the operation portion main body 11, but as shown by an arrow R, the center of the sheath base end cap 16 It can be freely rotated around the axis.

  On the inner surface side of the outer cylinder member 15, an internal space 17 communicating with the liquid injection port 14 is formed surrounding the outer cylinder member 15 over the entire circumference of 360 °, and the inner space 17 of the outer cylinder member 15 and the sheath base end cap 16 are formed. One or a plurality of through holes 18 for communicating with the internal space are formed. A pair of O-ring-shaped annular seal members 19 for watertight sealing between the inner peripheral surface of the outer cylindrical member 15 and the outer peripheral surface of the sheath base end cap 16 are provided in the vicinity of both front and rear end positions of the outer cylindrical member 15. It has been. In addition, an O-ring 21 is provided in the vicinity of the rear end of the sheath base end cap 16 for watertight sealing between the outer peripheral surface of the reinforcing pipe 9 passing through the inner peripheral portion thereof.

  With such a configuration, when a liquid injection device T is connected to the liquid injection port 14 and a liquid such as a contrast medium or a chemical solution is sent out from the liquid injection device T, the liquid passes through the through-hole 18 and flows into the flexible sheath 1. As shown by the arrow in FIG. 3, the flexible space 1 is sent to the distal end side of the flexible sheath 1 through the internal space (that is, the gap between the inner surface of the flexible sheath 1 and the operation wire 2). It is fed from the tip of the sheath 1. And, in order to adjust the orientation of the distal electrode 3 according to the state of the case etc., even if the flexible sheath 1 is rotated around the axis on the proximal end side, the liquid injection port 14 does not rotate with it, The liquid injection operation with the liquid injection tool T can be easily performed, and the flexible sheath 1 can be easily rotated without being bothered by the liquid injection tool T, even during the liquid injection operation. It can be carried out. In this embodiment, in order to rotate the flexible sheath 1 about the axis, the operation unit 10 may be rotated. However, the flexible sheath 1 is rotatable about the axis with respect to the operation unit 10. The thing of the structure connected with this may be sufficient.

  FIG. 5 shows the overall configuration of an endoscope treatment tool (high-frequency incision tool) according to the second embodiment of the present invention. Here, the flexible sheath 1 is formed only of an electrically insulating flexible tube, and the distal end portion of the conductive operation wire 2 inserted and disposed throughout the entire length is the distal end of the flexible sheath 1. The tip electrode 103 is disposed so as to be exposed on the outer surface. Other configurations are the same as those of the first embodiment. Thus, the present invention can be applied to various types of endoscope treatment tools.

  The present invention is not limited to the first and second embodiments. For example, the present invention can also be adopted in a mechanical endoscope treatment instrument that does not use a high-frequency current.

FIG. 3 is a side cross-sectional view of the vicinity of the liquid injection port of the endoscope treatment tool according to the first embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS The whole block diagram of the treatment tool for endoscopes of the 1st Embodiment of this invention. The side sectional view of the tip part of the treatment tool for endoscopes of the 1st embodiment of the present invention. Sectional drawing of the part cut | disconnected by the AA line in FIG. 1 of the 1st Embodiment of this invention. The whole block diagram of the treatment tool for endoscopes of the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Flexible sheath 1A ... Coil pipe 1B ... Outer skin (flexible tube)
DESCRIPTION OF SYMBOLS 2 ... Operation wire 3,103 ... Tip electrode 10 ... Operation part 11 ... Operation part main body 14 ... Liquid injection port 15 ... Outer cylinder member 16 ... Sheath base end cap 17 ... Internal space 18 ... Through-hole 19 ... Annular seal member 20 ... Retaining nut

Claims (9)

In an endoscope treatment instrument having a configuration in which an operation unit is connected to a proximal end of a flexible sheath that is inserted into and removed from a treatment instrument guide tube of an endoscope.
Endoscopic treatment, characterized in that a liquid injection port for injecting liquid from the proximal end side into the flexible sheath is rotatably arranged around the axis of the proximal end portion of the flexible sheath. Ingredients.   2. The endoscope treatment tool according to claim 1, wherein an outer cylindrical member surrounding a cylindrical sheath proximal end base constituting the proximal end portion of the flexible sheath is around an axis with respect to the sheath proximal end base. An endoscope treatment tool, wherein the liquid injection port is formed so as to protrude from the side surface of the outer cylinder member toward the side thereof.   The endoscope treatment tool according to claim 2, wherein a through-hole that communicates the internal space of the outer cylinder member communicating with the liquid injection port and the internal space of the sheath base end cap is the sheath base end cap. Endoscopic treatment tool formed on the body.   The endoscopic treatment instrument according to claim 3, wherein an annular seal member for watertightly sealing between an inner peripheral surface of the outer cylinder member and an outer peripheral surface of the sheath base end cap is the outer cylinder. Endoscopic treatment tool provided near both front and rear ends of a member.   The endoscope treatment tool according to any one of claims 1 to 4, wherein the liquid injection port is rotatable about an axis with respect to a proximal end portion of a flexible sheath and also to the operation unit. Endoscopic treatment tool that is rotatably arranged.   The endoscope treatment tool according to claim 5, wherein a proximal end portion of the flexible sheath is connected to the operation portion so as not to rotate about an axis.   The endoscope treatment tool according to any one of claims 1 to 6, wherein a conductive operation wire through which a high-frequency current is passed is disposed to be inserted through the entire length of the flexible sheath. Treatment tool.   The endoscope treatment tool according to any one of claims 1 to 7, wherein the flexible sheath is configured by covering a metal coil pipe with a flexible tube. Ingredients.   The endoscopic treatment instrument according to any one of claims 1 to 7, wherein the flexible sheath is composed of only a flexible tube.

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