JPH0889475A - Treating device for endoscope - Google Patents

Abstract

PURPOSE: To provide a treating device for an endoscope with improved operability smoothly bendable by drawing an operation wire of a multilumen tube with multiple lines of notches arranged in almost same directions with an interval and composing to be elastically deformed in a direction to narrowing the width of the notches. CONSTITUTION: A multilumen tube 2 of this treating device for an endoscope is composed of an elastic material with a lumen 21 for operation wire insertion bored through in the axis direction at the outer periphery and a main lumen 22 bored through in the axis direction in the vicinity of the center to be utilized for endoscopic treatment. Notches 24 crossing almost rectangularly the notches 21 for operation wire insertion with a width gradually increasing toward the outside are fomaed on the tube 2 with an interval in the axis direction. Thus, the multilumen tube 2 becomes bendable within a range of the notches 24 formation by drawing an operation wire 9 inserted into the lumen 21 for operation wire insertion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a treatment instrument for an endoscope which can be arbitrarily curved by remote control.

[0002]

2. Description of the Related Art Biopsy forceps and other treatment instruments for endoscopes are
It is directed to the affected part in the body cavity through the forceps channel of the endoscope, but in order to accurately aim at the affected part, it is necessary to change the direction of the tip portion by remote control.

However, the diameter of the shaft of the treatment instrument is 1 to
Since it is as thin as about 2 mm, it is not possible to provide a bending mechanism used in an endoscope. Therefore, in the conventional treatment instrument for endoscope, the coil pile of the tightly wound coil forming the shaft is roughly wound only at the tip portion and the operation wire is pulled so that the roughly wound portion of the coil pipe is curved. It was

[0004]

However, it is difficult to obtain a sufficient bending angle and the operation force amount is difficult in the case where the operation wire is pulled to bend the roughly wound portion of the coil pipe as described above. Since it is heavy and the operation wire is easily broken, it is not practical.

Therefore, it is an object of the present invention to provide an endoscopic treatment tool capable of bending a shaft at a desired angle with a light operation.

[0006]

In order to achieve the above-mentioned object, an endoscopic treatment tool of the present invention comprises an operating wire insertion lumen which is axially penetrated in the vicinity of an outer edge portion, and an operating wire insertion lumen. The operation wire insertion lumen is cut substantially vertically into a multi-lumen tube made of an elastic material having a main lumen axially penetrating near the center for use in endoscopic treatment. In this way, a plurality of notches with a width that gradually widens outward from the outer edge side are arranged in the same direction at intervals in the axial direction, and the multi-lumen tube forms a part of the shaft. The pulling operation of the operation wire inserted through the operation wire insertion lumen causes the multi-lumen tube to be curved within the range where the cut is formed. And it features.

[0007]

Embodiments will be described with reference to the drawings. Figure 1
The tip part of the biopsy forceps for an endoscope is shown, and most of the shaft is formed by a flexible coil pipe 1 formed by closely winding a stainless steel wire with a uniform diameter. Its length is, for example, about 1.5 to 2.5 m.

At the tip of the coil pipe 1, a multi-lumen tube 2 made of a soft, flexible and elastic material such as silicon rubber is connected.
Are connected through and form part of the shaft. The length of the multi-lumen tube 2 is, for example, about 1 to 3 cm.

Further, the multi-lumen tube 2
A distal end working portion 6 configured to open and close a pair of forceps cups 4 by a link mechanism 5 is connected to the distal end of the. 7 is
The support member of the distal end working portion 6 supports the forceps cup 4 so as to be openable and closable, and is fixedly connected to the distal end of the multi-lumen tube 2.

A pair of operation wire insertion lumens (through holes) 21 for inserting the bending operation wire 9 are axially penetrated through the multi-lumen tube 2 on both upper and lower sides near the outer edge of the multi-lumen tube 2. Have been drilled.

The operation wire 9 is inserted from the inside of the coil pipe 1 into the operation wire insertion lumen 21 so as to be able to move back and forth.
Is a multi-lumen tube 2 as shown in FIG.
Is connected at the front end of the multi-lumen tube 2 through the peripheral portion of the multi-lumen tube 2, where the multi-lumen tube 2 is connected.
It is stuck to.

At the central position of the multi-lumen tube 2, a main lumen 22 is bored through the multi-lumen tube 2 in the axial direction, and the forceps cup 4 is placed therein.
An opening / closing operation wire 11 for opening / closing is opened and closed freely.

Further, the multi-lumen tube 2 has a V-shaped cut 2 whose width gradually increases toward the outside.
4 is formed perpendicular to the axial direction of the multi-lumen tube 2. The notch 24 does not necessarily have to be V-shaped, but may have any shape as long as the width gradually increases toward the outside.

The notches 24 are turned 180 degrees at equal intervals in the axial direction of the multi-lumen tube 2,
Therefore, a plurality of layers are alternately formed on the upper and lower sides. In this embodiment, four notches 24 are arranged on the upper and lower sides.

Each notch 24 cut from the outer edge side of the multi-lumen tube 2 cuts the operating wire insertion lumen 21 vertically from the side, and the tip end of each notch 24 further has a multi-lumen tube 2.
3, the main lumen 22 is partially cut away.

Thus, the lumen 2 for inserting the operation wire
Since the notch 24 is formed so as to cut 1 from the side, one of the operation wires 9 inserted into the operation wire insertion lumen 21 is pulled from the operation portion on the proximal end side, which will be described later, as indicated by an arrow A. Then, the multi-lumen tube 2 is elastically deformed as a whole so that the width of each notch 24 on the pulled operation wire 9 side is narrowed, and the multi-lumen tube 2 is smoothly curved in the arrow B direction.

In any state, the opening / closing operation wire 11 whose front end is fixed to the rear end of the link mechanism 5 and which is inserted from the main lumen 22 into the coil pipe 1 is moved forward and backward from the operation portion side. As a result, the forceps cup 4 can be opened and closed arbitrarily.

FIG. 4 shows the operating portion connected to the base end side of the coil pipe 1, and the other end side of the connecting cylinder 31 to which the base end of the coil pipe 1 is fixed is screwed into the operating portion frame 30. It is connected. On the other end side of the operation unit frame 30,
A finger rest 32 for operation is attached.

A slider 33 with a finger hook mounted on the coil pipe 1 so as to move back and forth in the axial direction indicated by the arrow C.
An opening / closing operation wire 11 is fixed to the tip of the. Therefore, the open / close operation wire 11 is moved back and forth by moving the slider 33 forward and backward, and the forceps cup 4 can be opened and closed.

An operating lever 3 with a finger rest that is rotated about the rotating shaft 34 as shown by an arrow D.
The proximal ends of the operation wires 9, 9 are connected to both sides of the rotary shaft 34 with the rotary shaft 34 interposed therebetween.

Therefore, the operating lever 35 is connected to the rotary shaft 34.
By rotating the wire about the center, one of the pair of operation wires 9, 9 can be pulled by an arbitrary amount to bend the distal end side multi-lumen tube 2 portion by an arbitrary angle.

FIG. 5 shows an embodiment in which the present invention is applied to a cytodiagnosis brush. In this embodiment, the coil pipe 1 and the multi-lumen tube 2 are constructed in the first configuration.
Of the first embodiment, and the bending operation is the same as that of the first embodiment.

In this embodiment, an advancing / retreating operation wire 41 inserted from the inside of the coil pipe 1 to the inside of the main lumen 22 of the multi-lumen tube 2 is arranged so as to project forward from the tip of the multi-lumen tube 2 and a brush is provided at that portion. 42 are planted.

Therefore, by operating the advancing / retreating operation wire 41 from the operating portion side, the brush 42 can be reciprocated in the axial direction to collect cells. 43
Is a stopper fixed to the advancing / retreating operation wire 41.
The tips of the upper and lower two operation wires 9, 9 are respectively attached to the tips of the multi-lumen tube 2 at their tip caps 44.
Attached to.

FIG. 6 shows an embodiment in which the present invention is applied to a contrast agent injection tube. In this embodiment, the whole is formed by a single multi-lumen tube 2, and the main lumen 22 serves as a channel for the contrast medium.

In this embodiment, only one operation wire insertion lumen 21 is bored on the upper side, and accordingly, the notch 24 is also formed only on the upper side near the tip portion of the coil pipe 1.

The distal end of the operation wire 9 inserted into the operation wire insertion lumen 21 is fixed in the recess 51 formed in the coil pipe 1 on the front side of the notch 24. In addition, the notch 2 is provided around the notch 24.
A flexible rubber tube 52 is coated so that the contrast agent does not leak from the four portions.

FIG. 7 shows a treatment instrument 1 of the present invention such as the above-mentioned biopsy forceps, cytological brush or contrast injection tube.
00 shows a use state of the treatment instrument 00, and the treatment instrument 100 having the tip passed into the treatment instrument insertion channel 201 of the endoscope 200 and sent out into the body cavity is desired by changing the direction of the tip portion at an arbitrary angle. The affected area of can be sniped accurately from the front.

Then, as shown in FIG. 7, the endoscope 2
00 can be easily inserted into a narrow hole that opens on the side wall of the lumen in which 00 is inserted, and when branching deep inside the hole, etc., the direction of the tip is arbitrarily adjusted to select the traveling direction. can do.

[0030]

According to the present invention, by pulling the operation wire, the multi-lumen tube is elastically deformed in a direction in which a plurality of cuts arranged in a substantially equal direction at intervals are narrowed, so that part thereof is elastically deformed. Can be smoothly curved, and the cut is a lumen for inserting the operation wire 2
Since 1 is formed so as to be cut from the side, it can be bent at an arbitrary angle only by lightly pulling the operation wire, and the operability is very good.

As a result, the affected area can be easily sniped from the front side in the body cavity through the treatment tool insertion channel of the endoscope, and a predetermined treatment can be accurately performed. Further, in a branched lumen or the like, an arbitrary direction can be obtained. Can be easily inserted into
The present invention can be applied not only to biopsy, cytodiagnosis, and contrast enhancement but also to treatment tools for performing various endoscopic treatments.

[Brief description of drawings]

FIG. 1 is a side sectional view of a tip portion of a first embodiment.

FIG. 2 is a partial perspective view of a tip portion of the first embodiment.

FIG. 3 is a front sectional view of the multi-lumen tube of the first embodiment.

FIG. 4 is a side cross-sectional view of the operation unit according to the first embodiment.

FIG. 5 is a side sectional view of a tip portion of a second embodiment.

FIG. 6 is a side sectional view of a tip portion of a third embodiment.

FIG. 7 is a schematic view showing an example of a usage state of the treatment tool of the present invention.

[Explanation of symbols]

 2 Multi-lumen tube 9 Operation wire 21 Lumen for inserting operation wire 21 22 Main lumen 22 24 Notch

Claims (1)

[Claims] 1. An operating wire insertion lumen that is bored through in the axial direction near the outer edge portion, and a main hole that is bored through in the axial direction near the center for use in endoscopic treatment. A multi-lumen tube made of an elastic material having a lumen, a notch having a shape in which the width gradually widens toward the outside cut from the outer edge side so as to cut the operation wire insertion lumen substantially vertically. The slits are arranged in the same direction with a space in the axial direction, a part of the shaft is formed by the multi-lumen tube, and the notch is cut by pulling the operation wire inserted through the operation wire insertion lumen. A treatment instrument for an endoscope, wherein the multi-lumen tube is curved within the formed range.