JP2002253563A - Treatment instrument for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a treatment instrument for an endoscope operated with a single hand and improving a selective insertion performance in a lumen. SOLUTION: This treatment instrument for the endoscope is provided with a first sheath member 5 formed with a curved part 8, which is curved at a prescribed angle relative to the central axis, in the adjacent to the tip, the first sheath member 5 is provided with an advancing/retreating hard part A inside the curved part 8 by having bending elasticity harder than the bending elastic part of the curved part 8, and a second sheath member 6 inserted in the first sheath member 5 is pushed/pulled so as to advance/retreat the hard part A inside the curved part 8 of the first sheath member 5 and control the curbed part 8 to curve.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a treatment tool for an endoscope used for a procedure under an endoscope.

[0002]

2. Description of the Related Art As shown in FIG. 12, a treatment tool for an endoscope disclosed in Japanese Patent Application Laid-Open No. Hei 9-168540 has a distal end side sheath 91 connected to the distal end of a rear end side coil 90, and this distal end side sheath 91 A sleeve 92 is provided at the tip of the sleeve 92, and a treatment section 93 is provided at the sleeve 92, while the tip of the angle wire 94 inserted into the rear end coil 90 is connected to the outer periphery of the sleeve 92. Then, by rotating the bending operation rotary knob 96 in the operation unit 95 in the Q direction, the screw 97 moves in the T direction, pulls the angle wire 94 connected to the screw 97 in the t direction, and the angle wire 94 The distal end sheath 91 is curved and the direction of the treatment section 93 at the distal end is selected. The treatment section 93 is operated by an operation slider 98 provided on the operation section 95.

[0003]

In the above-mentioned conventional endoscope treatment instrument, when the distal end sheath 91 is bent as shown in FIG. 12, the angle wire 94 protrudes like a chord of a bow, and the lumen is obstructed. When the wire is selectively inserted into the inside, the angle wire 94 becomes a hindrance, and there is a problem that it is difficult to insert the wire. Also, when performing the operation of bending the distal end side sheath 91, the bending operation is performed by holding the operating portion main body of the operating portion 95 with one hand and turning the rotary knob 96 with the other hand, for example, selectively into the lumen. In the case of insertion into a cradle, there is a problem that an operation of bending or returning the bending cannot be performed quickly, and it takes a long time for the inspection. In addition, since these operations cannot be performed without using both hands, operability is poor.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a treatment tool for an endoscope which can be operated with one hand and has improved selective insertion into a lumen. It is what it was.

[0005]

According to the present invention, there is provided a sheath having a curved portion formed at a predetermined angle with respect to a central axis near a distal end thereof, and a treatment provided on the distal end side of the curved portion of the sheath. Means, an operation wire inserted into the sheath and operating the treatment means, first operation means provided at a proximal end of the sheath for pushing and pulling the operation wire, and the bending section A hard member having a bending elasticity harder than that of the bending elastic portion and capable of moving forward and backward inside the curved portion of the sheath; a connecting member inserted into the sheath and connected to the hard member; An endoscope provided at a base end portion, the second operation means for pushing and pulling the connecting member to advance and retreat the connecting member inside the curved portion of the sheath. It is a treatment tool.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) An endoscopic treatment tool according to a first embodiment of the present invention will be described with reference to FIGS. The treatment tool for an endoscope according to the present embodiment relates to forceps for an endoscope, and FIG. 1 is an external view schematically showing the entire treatment tool for an endoscope. The endoscope treatment tool 1 includes an operation unit 2,
It comprises a sheath part 3 and a treatment part 4.

As shown in FIG. 2, the sheath portion 3 has a double tube structure of an outer first sheath member (tube member) 5 and an inner second sheath member (tube member) 6. One sheath member 5 is formed by a close-wound coil member. The operating section 2 is connected to the rear end of the first sheath member 5 as first operating means, and the treatment section 4 is connected to the distal end of the first sheath member 5. A second sheath member 6 is provided in the first sheath member 5 so as to be able to advance and retreat.

As shown in FIG. 3, the second sheath member 6 has a distal-side hard portion A composed of a hollow pipe member 6a and a proximal soft portion B composed of a soft sheath member 6b. It is arranged freely. The hollow pipe member 6a constituting the distal-side hard portion A of the second sheath member 6 has a bending elasticity that is harder than a bending elastic portion of a later-described bending portion 8 of the first sheath member 5, and the proximal soft portion B It is formed of a tightly wound coil member that is more flexible. An operation wire 7 for moving the treatment section 2 as treatment means is inserted into the second sheath member 6.

[0009] As shown in FIG. 2, is in the vicinity of the tip portion of the first sheath member 5 in the sheath portion 3 curved portion 8 which is bent at a predetermined angle theta ₁ with respect to the center axis are formed.
In the first sheath member 5, a cover member 9 that covers the drive mechanism of the treatment section 4 is provided on the distal end side of the bending section 8.

As the second sheath member 6, as shown in FIG. 9, a solder or wax coat 11 is applied to the tip of a soft sheath 6b, and this portion is used as a tip-side hard portion C.
The hand-side portion may be formed as a hand-side soft part D.

As shown in FIG. 4, the first sheath member 5
The operation unit 2 provided at the base end of the device has an operation unit main body 12,
The proximal end of the first sheath member 5 is fixedly connected to the distal end 13 of the operation section main body 12. The close-wound coil member of the proximal soft portion B as a connecting member connected to the hard member of the second sheath member 6 is guided into the operating portion main body 12, and the bending operation slider disposed on the operating portion main body 12 14. The operation wire 7 is a treatment section operation slider 1 disposed on the operation section body 12.
5 is connected.

The treatment section operation slider 15 constitutes second operating means for driving the treatment section 4 by pushing and pulling the operation wire 7, and the treatment section operation slider 14 pushes and pulls the second sheath member 6. This constitutes a second operating means for moving the inside of the first sheath member 5 back and forth.

As shown in FIG. 4, a bending operation slider 14 is provided.
Is moved in the X direction (tip direction), the second sheath member 6 connected thereto moves in the x direction, and when the bending operation slider 14 is moved in the Y direction, the second sheath member 6 The hard portion A of the second sheath member 6 moves in the y direction and retreats in the retreating direction in which the hard portion A of the second sheath member 6 is displaced from the curved portion 8 of the first sheath member 5.

A screw portion 16 is provided on the operation portion main body 12 at a position behind the bending operation slider 14, and a ring-shaped stopper 17 is screwed to the screw portion 16. The stopper 17 regulates the bending operation slider 14 so as not to contact the treatment section operation (operation) slider 15 when the bending operation slider 14 is retracted. Since the stopper 17 is screwed into the screw portion 16, the position of the stopper 17 can be changed, and the restricting position of the bending operation slider 14 can be changed.

The operation unit 2 will be further described. As shown in FIGS. 4 to 6, the operation portion main body 12 is provided with a slit-shaped guide groove 21 along the axial direction. As shown in FIG. 5, bending operation slider fixing members 22 and 23 which are divided into two in the radial direction are provided inside the bending operation slider 14 fitted to the operation portion main body 12, and both fixing members 2 are provided.
Second sheath connection grooves 22a, 23a for engaging and connecting the rear end portion of the second sheath member 6 are provided between the second sheath member 2 and the second sheath member 23.

Further, male threads 22b and 23b are provided at one end of the fixing members 22 and 23, respectively.
2b and 23b are screwed with female screw portions 14a provided on the inner peripheral surface of the bending operation slider 14, and
2, 23 are fastened and fixed. Also, both fixing members 2
2, 23 have convex portions 22c protruding into the guide groove 21;
The bending operation slider 14 is guided in the axial direction of the operation section main body 12 by engaging the projections 22 c and 23 c with the guide grooves 21.

Inside the treatment section operation slider 15 which is fitted to the operation section body 12, treatment section operation slider fixing members 31 and 32 which are radially divided into two are provided. Are provided with engagement grooves 31a and 32a for engaging with a wire fixing member 33 fixed to the rear end of the operation wire 7. Further, male threads 31b, 32b are provided at one end of both fixing members 31, 32, and these male threads 31b, 32b are screwed and fixed to female threads 15a provided on the inner peripheral surface of the treatment section operation slider 15. ing.

As shown in FIG. 6B, the projections 3 projecting into the guide grooves 21 are provided on both fixing members 31 and 32.
1c and 32c are provided, and by engaging the convex portions 31c and 32c with the guide grooves 21, the treatment portion operation slider 15 is provided.
Is guided in the axial direction of the operation section main body 12. A finger ring 34 is provided at the rear end of the operation section main body 12.

Next, the operation of the above configuration will be described.
As shown in FIG. 7, when the bending operation slider 14 is moved in the X direction of FIG. 4, the second sheath member 6 connected thereto moves in the x direction, and the hard portion A is moved to the first sheath member 5. It moves toward the bending portion 8. Since the rigid portion A is larger than the elastic force of the bending W of the curved portion 8 of the first sheath member 5 and is gradually moved in the x-direction, bending W of the curved portion 8 has an angle theta ₂ is returned in the direction of X ₁ And finally, as shown in FIG.
The curved portion 8 becomes a straight line.

When the bending slider 14 is moved in the Y direction from this state, the hard portion A of the second sheath member 6 is displaced from the bending portion 8 of the first sheath member 5, so that the first sheath bending angle of the member 5 is go back to the angle of the original theta _1.

As described above, the bending operation slider 14 is moved to X, Y
, The bending angle of the bending portion 8 of the first sheath member 5 can be adjusted to an arbitrary angle.
After adjusting the bending angle, the treatment section operation slider 15 is operated to operate the treatment section 4.

In the above configuration, the outer first sheath member 5 having a bending portion 8 bent at a predetermined angle with respect to the central axis near the distal end, and the hard portion having a bending elastic force greater than the bending elastic force of the bending portion 8 are provided at the distal end. The bending operation of the bending portion 8 can be performed by advancing and retreating the inner second sheath member 6 included in the above, so that the bending operation can be performed without the angle wire projecting in an arc shape, and the selective insertion into the lumen can be easily performed. Become. In addition, since the operation can be performed with one hand, there is an effect that the curvature can be quickly adjusted. In addition, since the bending angle of the bending portion 8 can be fixed at an arbitrary position, not only the selective insertion into the lumen but also
There is an effect that even when approaching the organization from the tangential direction, the approach can be easily made.

(Second Embodiment) An endoscopic treatment tool according to a second embodiment of the present invention will be described with reference to FIGS. However, the same components as those of the above-described first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 11, a ratchet groove 41 is provided in the operation portion main body 12 along the guide groove 21, and the ratchet groove 41 is provided in the ratchet fixing tool disposed on the bending operation slider fixing member 22. By engaging with 42, it functions as a ratchet mechanism, and constitutes a slider fixing mechanism 43 for fixing the bending operation slider 14 at an arbitrary position.

The ratchet fixture 42 of the slider fixing mechanism 43 will be further described. As shown in FIG. 11B, a screw hole 46 is provided in the bending operation slider fixing member 22 so as to face the ratchet groove 41, and the screw hole 46 has a screw portion 47a screwed into the screw hole. Cylinder 4
7 are provided. A locking member 49 urged by the coil spring 48 toward the ratchet groove 41 is provided in the cylindrical body 47.
Is inserted so that it can move forward and backward. The locking member 49 is provided with a locking portion 49a that is detachable from the ratchet groove 41, and the bending operation slider 14 is fixed at an arbitrary position by locking the locking member 49 to the ratchet groove 41. I can do it.

Note that the present invention is not limited to the above-described embodiments, but can be applied to other embodiments. According to the above description, the following items can be obtained.

(Appendix) A first pipe member having a bending portion bent at a predetermined angle with respect to the central axis near the distal end; and a treatment means provided at the distal end side of the bending portion of the first pipe member, In one tube member, an operation wire for operating the treatment means and a second tube member having a hard portion at a distal end portion larger than a bending elasticity of a bending portion of the first tube member are provided,
An endoscope treatment tool, wherein the second tube member is operated by a bending angle control means for controlling a bending angle of a bending portion of the first tube member.

2. The first tube member is inserted into the first tube member so as to be able to advance and retreat, and an operation wire for operating the treatment means is inserted.
The treatment tool for an endoscope according to the above item.

[0029]

According to the present invention, the operation can be performed with one hand,
In addition, it is possible to provide a treatment tool for an endoscope with improved selective insertion into a lumen.

[Brief description of the drawings]

FIG. 1 is a schematic external view of an entire endoscope treatment tool according to a first embodiment of the present invention.

FIG. 2 is a schematic view of a distal end curved portion of the endoscope treatment tool according to the first embodiment of the present invention.

FIG. 3 is a longitudinal sectional view of a distal end portion of a second sheath member of the endoscope treatment tool according to the first embodiment of the present invention.

FIG. 4 is a schematic view of an operation unit of the endoscope treatment tool according to the first embodiment of the present invention.

5A is a longitudinal sectional view of a bending operation slider portion of the endoscope treatment tool according to the first embodiment of the present invention, and FIG. 5B is a sectional view taken along line GG of FIG. It is.

FIG. 6A is a longitudinal sectional view of a treatment section operation slider portion of the treatment tool for an endoscope according to the first embodiment of the present invention, and FIG.
FIG. 3 is a cross-sectional view taken along line HH in FIG.

FIG. 7 is a schematic diagram when the bending portion of the treatment tool for an endoscope according to the first embodiment of the present invention is bent.

FIG. 8 is a schematic view of the bending portion of the treatment tool for an endoscope according to the first embodiment of the present invention when it is straight.

FIG. 9 is a longitudinal sectional view of a distal end portion of another second sheath member of the endoscope treatment tool according to the first embodiment of the present invention.

FIG. 10 is a schematic external view of a treatment tool for an endoscope according to a second embodiment of the present invention.

11A is a cross-sectional view of a portion along a line II in FIG. 10, and FIG. 11B is a cross-sectional view of a ratchet fixing tool of the bending operation slider.

FIG. 12 is a schematic view of a conventional treatment tool for an endoscope.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Endoscope treatment tool, 2 ... Operation part, 3 ... Sheath part, 4 ...
Treatment section, 5: first sheath member, 6: second sheath member, A
... hard part on the tip side, B ... soft part on the hand side, 7 ... operation wire,
8 ... Bending part, 12 ... Operation part main body, 14 ... Bending operation slider, 15 ... Treatment part operation slider.

Claims (1)

[Claims] 1. A sheath in which a curved portion curved at a predetermined angle with respect to a central axis is formed near the distal end, a treatment means provided on a distal end side of the curved portion of the sheath, and inserted into the sheath. An operating wire for operating the treatment means; a first operating means provided at a proximal end of the sheath for operating the push-pull operation of the operating wire; and a harder than the bending elastic portion of the bending portion. Has bending elasticity,
A hard member that can advance and retreat inside the curved portion of the sheath; a connecting member that is inserted into the sheath and connected to the hard member; and a push / pull operation that pushes and pulls the connecting member provided at a base end of the sheath. And a second operating means for moving the connecting member back and forth inside the curved portion of the sheath.