JPH10309284A - Treatment tool system for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To economically construct a treatment tool system for endoscope provided with multiple tip treatment parts by allowing the system to use a common unit other than tip treatment parts when different types of treatment tools are used. SOLUTION: In this system to construct endoscope treatment tools, a tip treatment part 10 which performs treatments in a body cavity is provided at the tip of a flexible sheath 1 passed through the treatment tool insertion channel of an endoscope, and the base of the flexible sheath 1 is provided with an operation part 100 which remotely manipulates the tip processing part 10 through a manipulation wire 2 passed through the flexible sheath 1. Several types of tip processing parts 10, 20, or 30 can freely be engaged with/disengaged from the flexible sheath 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a treatment tool system for an endoscope used by being inserted into a treatment tool insertion channel of an endoscope.

[0002]

2. Description of the Related Art An endoscope treatment instrument system including, for example, biopsy forceps, grasping forceps, a high-frequency treatment instrument, and the like, generally has a distal end of a flexible sheath inserted through a treatment instrument insertion channel of the endoscope. A distal treatment section for performing treatment in a body cavity is provided, and an operation section for remotely operating the distal treatment section via an operation wire inserted into the flexible sheath is provided at a proximal end of the flexible sheath. It is provided in the unit.

[0003] Such an endoscope treatment instrument system cannot be disassembled at all because of its elaborate structure, but it is inconvenient for cleaning and repair. Therefore, the distal treatment section, the flexible sheath, and the operating section are inconvenient. There is also a treatment tool system for an endoscope that is configured to be freely disengageable (see Japanese Utility Model Application Laid-Open No. 3-78515).
issue).

[0004]

However, the structure in which the distal treatment section, the flexible sheath, and the operation section are detachably engaged as described above is also convenient for cleaning and repair. When it is desired to use different types of treatment tools, it is necessary to prepare a set of new and expensive sets, which is economically burdensome.

Accordingly, the present invention enables the use of a unit other than the distal treatment section when using different types of treatment tools, and makes it possible to economically provide an endoscope treatment tool system having a number of distal treatment sections. The purpose is to be able to build.

[0006]

Means for Solving the Problems In order to achieve the above object, an endoscope treatment instrument system according to the present invention comprises a flexible sheath inserted into a treatment instrument insertion channel of an endoscope. A tip treatment section for performing treatment in is provided,
An operation unit for remotely operating the distal treatment unit via an operation wire inserted into the flexible sheath is provided with an endoscope treatment tool provided at a base end of the flexible sheath. In the system to be constructed, a plurality of types of distal treatment sections are configured to be freely detachable from the flexible sheath.

[0007] The operation wire has a distal end portion fixed to the distal treatment section and a proximal end portion removably engaged with the operation portion so as to be insertable into and removable from the flexible sheath. It may be.

The operating section may be detachable from the flexible sheath, and the distal end of the flexible sheath and the distal treatment section may be engaged by a spiral groove. . Further, the flexible sheath may be a coil pipe, or the flexible sheath may be a synthetic resin tube.

[0009]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an example of an endoscope treatment instrument system according to an embodiment of the present invention, in which a flexible sheath 1 inserted into a treatment instrument insertion channel of an endoscope (not shown) and a body cavity A plurality of types of distal treatment sections 10, 20, 30 for performing different treatments, and a flexible sheath 1
An operation unit 100 for remotely operating the distal treatment unit 10 via an operation wire 2 inserted therein is provided detachably (that is, detachably).

The flexible sheath 1 is, for example, a tube made of a fluororesin such as tetrafluoroethylene resin or the like, and a connection base 1 for connecting to the operation unit 100 is provided at the proximal end thereof.
a is attached.

The first distal treatment section 10 is a biopsy forceps for collecting tissue such as a mucous membrane in a body cavity, and a pair of tissue collection cups (tips) rotatably supported on a distal end main body 11 by a support shaft 13. A treatment member 12 is connected to a distal end side of a link mechanism 14 driven by the forward / backward movement of the operation wire 2.

The operation wire 2 is formed of, for example, a stranded wire of stainless steel wire, and the front end thereof is fixed and connected to a wire connection 15 connected to the rear end of the link mechanism 14 by brazing or soldering. Have been.

As shown in the enlarged view of FIG. 2, the distal end main body 11 has a link mechanism supporting portion 11a for supporting the link mechanism 14, and a connecting portion 11b in which a male screw is screwed at the outer peripheral portion on the rear side. The connecting portion 11b is formed so as to be removably threadably connected to a female screw (not shown) at the inner peripheral portion of the distal end of the flexible sheath 1.

As a result, by moving the operation wire 2 in the axial direction with the distal treatment section 10 connected to the flexible sheath 1, the link mechanism 14 is driven to open and close the tissue collection cup 12. .

Returning to FIG. 1, the second distal treatment section 20
It is a grasping forceps for grasping a foreign object, an organ, or the like in a body cavity, and has a configuration in which a pair of grasping pieces 22 (distal treatment members) are provided to be able to open and close instead of the tissue sampling cup 12 of the first distal treatment section 10. Has become. Other portions have the same configuration as the first distal treatment section 10.

The third distal treatment section 30 is a high-frequency snare for removing a polyp or the like in the body cavity through a high-frequency current, and a conductive annular snare wire 32 (distal treatment member) is fixed to the distal end of the operation wire 2. Are linked.

Then, as shown in FIGS. 3 and 4,
By pushing and pulling the operating wire 2 passed through the flexible sheath 1 in the axial direction from the hand side and taking the snare wire 32 in and out of the distal end of the flexible sheath 1, the snare wire 32 expands and contracts. It has become.

The length of the operation wire 2 connected to each of the distal treatment sections 10, 20, 30 is set corresponding to the same length of the flexible sheath 1, and the length of the operation wire 2 on the hand side is set. A reinforcing pipe 2a having a fixing end 2b for connecting and fixing to the same operation unit 100 is attached to the end.

The fixing end 2b is provided with a cap screw 1 described later.
The front and rear sides are formed to be thick so as to prevent removal in the axial direction when pressed and fixed to the operation unit 100 at 14, but the connection between the flexible sheath 1 and its end over the entire length including that part. It is formed to be thick enough to pass through the base 1a.

The operation section 100 includes a flexible sheath 1
This will be described with reference to FIG.
A cylindrical sheath connecting portion 10 divided by a plurality of slits 103 from the front side is provided at the distal end portion of the operation portion main body 101.
4 is formed therein, into which the connection base 1a of the flexible sheath 1 is inserted. At the tip of the sheath connecting portion 104, a not-shown slit is formed at the central portion in parallel with the shown slit 103.

A fastening ring 105 attached to the outer periphery of the sheath connecting portion 104 so as to be rotatable around an axis is provided with a VI-
As shown in FIG. 6 showing the VI cross section, the inner peripheral surface has a partially spirally inwardly curved inner peripheral surface, and the cross-sectional shape of the sheath connecting portion located inside the inner peripheral surface is formed in an oval shape. I have.

As a result, as shown in FIG. 5, the connecting base 1a of the flexible sheath 1 is fully inserted into the sheath connecting portion 104, and the fastening ring 105 is rotated around the axis so that the sheath connecting portion 104 is moved outward. , The connection base 1a of the flexible sheath 1 can be fixed to the inside thereof. By rotating the fastening ring 105 in the opposite direction, the connection is released and the connection base 1a is detached from the sheath connection portion 104. State.

A wire connecting member 109 for fixing the fixing end 2b of the operation wire 2 is slidably fitted in a longitudinal direction into a long groove 108 formed in an intermediate portion of the operation portion main body 101 so as to be large in the axial direction. The fixing end 2b of the operation wire 2 is inserted into a hole formed in the wire connecting member 109.

Reference numeral 113 denotes a terminal protruding laterally for connection with a high-frequency power supply. A screw portion (pressing screw) 114 protruding from the back side of the terminal 113 is connected to the wire connecting member 109. It is screwed in so that the end surface of the holding screw 114 abuts against the fixing end 2b of the operation wire 2 from the side.

As a result, when the terminal 113 is pinched and the holding screw 114 is screwed tightly into the wire connecting member 109, the fixing end 2b of the operation wire 2 is pressed and fixed to the wire connecting member 109.

When the terminal 113 is rotated in the opposite direction to loosen the cap screw 114, the pressed state is released and the operation wire 2 comes off the operation section 100. When the terminal 113 is connected to a high-frequency power supply and turned on,
The high-frequency current is transmitted from the set screw 114 through the operation wire 2 to the snare wire 32 and the like on the distal end side, so that high-frequency treatment can be performed.

The wire connecting member 109 includes the operation unit main body 1.
01 slider 110 that can be slid in the longitudinal direction
Are connected, and a thumb rests on a thumb rest 111 attached to an end of the operation unit main body 101, and a slider 110
Is moved between the index finger and the middle finger to slide the wire connecting member 109 forward and backward in the long groove 108,
The operation wire 2 can be moved forward and backward in the axial direction.

As described above, by using one operating section 100 and the flexible sheath 1 and selecting and connecting various distal treatment sections 10, 20, and 30 as necessary, various operating sections 100 and the flexible sheath 1 are provided. Endoscopic procedures can be performed.

Further, at the time of disassembly, since the operation wire 2 is pulled out from the inside of the flexible sheath 1, the inside of the flexible sheath 1 can be thoroughly cleaned and disinfected, and can be used hygienically.

In the above-described embodiment, the distal treatment section includes a biopsy forceps, a grasping forceps, and a high-frequency snare.
Although the type can be exchanged, various endoscope treatment tools such as a hot biopsy forceps and a basket-type gripper are configured to be freely disengageable from the same flexible sheath 1 and the operation unit 100 to construct a system. You may.

FIG. 7 shows the flexible sheath 1 and the distal treatment section 10.
2 shows a second example of the structure of the connecting portion with the tip body 11.
Is formed in a tubular shape, and a wavy spiral groove 16 is formed on the inner surface thereof, and a spiral groove 21 screwed with the spiral groove 16 is formed on the outer peripheral surface of the distal end of the flexible sheath 1. Even in this case, the distal end main body 11 and the distal end treatment section 10 can be freely disengaged.

FIG. 8 shows the flexible sheath 1 and the distal treatment section 10.
3 shows a third structural example of the connecting portion with the tip body 11.
Is formed in a cylindrical shape, and the tip main body 11
Is press-fitted at the tip.

The outer peripheral surface of the flexible sheath 1 and the inner peripheral surface of the connecting portion 11b of the distal end body 11 have irregularities which engage when the distal end of the flexible sheath 1 is pressed into the connecting portion 11b. 2
2, the flexible sheath 1 and the distal treatment section 10
It is a trap between them.

However, if the flexible sheath 1 and the distal end main body 11 are strongly pulled in directions opposite to each other in the axial direction, the distal end portion of the flexible sheath 1 is pulled out from the connecting portion 11b, and The distal treatment section 10 can be separated. And it can be connected again.

FIG. 9 shows the flexible sheath 1 and the distal treatment section 10.
4 shows a fourth example of the structure of the connecting portion, which is an example in which the flexible sheath 1 is formed by a tightly wound coil pipe made of stainless steel wire.

Here, the connecting portion 11b of the distal end main body 11 is formed in a cylindrical shape, and a spiral groove 16 is formed on the inner surface thereof so as to be screwed with the outer surface of the flexible sheath 1. And the distal treatment section 10 can be freely disengaged.

It should be noted that, as in the fifth and sixth embodiments shown in FIGS. 10 and 11, the pitch of the coil of the threaded portion 1c is made coarse or the diameter of the element wire is made large, so that the It is possible to make the state hard to loosen and stable.

Further, as in the seventh and eighth embodiments shown in FIGS. 12 and 13, a screw-like projection 116 screwed to the tip of the coil pipe forming the flexible sheath 1 is formed in a cylindrical shape. The connecting portion 11b may be partially formed at an intermediate portion or a rear end portion.

[0039]

According to the present invention, a plurality of types of distal end treatment sections are detachably attached to a distal end of a flexible sheath inserted into a treatment instrument insertion channel of an endoscope, so that different types are provided. When the treatment tool is used, a unit other than the distal treatment section can be shared, so that a treatment tool system for an endoscope having many distal treatment sections can be constructed very economically.

[Brief description of the drawings]

FIG. 1 is an exploded view of a treatment tool system for an endoscope according to a first embodiment of the present invention.

FIG. 2 is a side cross-sectional view of a distal end portion of a biopsy forceps, which is one of the distal treatment sections according to the first embodiment of the present invention.

FIG. 3 is a side cross-sectional view of a distal end portion of a high-frequency snare, which is one of the distal treatment sections according to the first embodiment of the present invention, in a swelling state.

FIG. 4 is a side sectional view showing a contracted state of a distal end portion of a high-frequency snare, which is one of the distal end treatment sections according to the first embodiment of the present invention.

FIG. 5 is a side sectional view showing a state where a biopsy forceps is attached to the operation unit according to the first embodiment of the present invention.

FIG. 6 is a sectional view taken along the line VI-VI of the first embodiment of the present invention. You.

FIG. 7 is a side sectional view showing a connection structure between a flexible sheath and a distal treatment section according to a second embodiment of the present invention.

FIG. 8 is a side sectional view showing a connection structure between a flexible sheath and a distal treatment section according to a third embodiment of the present invention.

FIG. 9 is a side cross-sectional view illustrating a connection structure between a flexible sheath and a distal treatment section according to a fourth embodiment of the present invention.

FIG. 10 is a side sectional view of a distal end portion of a flexible sheath according to a fifth embodiment of the present invention.

FIG. 11 is a side sectional view of a distal end portion of a flexible sheath according to a sixth embodiment of the present invention.

FIG. 12 is a side sectional view showing a connection structure between a flexible sheath and a distal treatment section according to a seventh embodiment of the present invention.

FIG. 13 is a side sectional view showing a connection structure between a flexible sheath and a distal treatment section according to an eighth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flexible sheath 2 Operation wire 10,20,30 Tip treatment part 12,22,32 Tip treatment member 100 Operation part 104 Sheath connection part 105 Clamp ring 109 Wire connection member 114 Holding screw

Claims (6)

[Claims] 1. A distal treatment section for performing treatment in a body cavity is provided at a distal end of a flexible sheath inserted through a treatment instrument insertion channel of an endoscope, and an operation inserted through the flexible sheath. In a system for constructing an endoscope treatment tool in which an operation unit for remotely operating the distal treatment unit via a wire is provided at a base end of the flexible sheath, a plurality of types of distal treatment units are provided. Is configured to be detachable from the flexible sheath. 2. The operation wire according to claim 1, wherein a distal end portion is fixed to the distal treatment section, and a proximal end portion is removably locked to the operation portion, and is insertable into and removable from the flexible sheath. The treatment tool system for an endoscope according to claim 1, wherein 3. The endoscope treatment tool system according to claim 1, wherein the operation section is detachable from the flexible sheath. 4. The endoscope treatment tool system according to claim 1, wherein the distal end of the flexible sheath and the distal treatment section are engaged by a spiral groove. 5. The treatment tool system for an endoscope according to claim 1, wherein the flexible sheath is a coil pipe. 6. The endoscope treatment instrument system according to claim 1, wherein the flexible sheath is a synthetic resin tube.