JP3406703B2 - Endoscope treatment tool - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a treatment instrument for an endoscope which can be arbitrarily bent by remote control. 2. Description of the Related Art Biopsy forceps and other endoscope treatment tools are
Although it is directed to the affected part in the body cavity through the forceps channel of the endoscope, it is necessary to be able to change the direction of the distal end portion by remote control in order to accurately aim at the affected part. [0003] However, the diameter of the shaft of the treatment tool is 1 to 1.
Since it is as thin as about 2 mm, a bending mechanism as used in an endoscope cannot be provided. Therefore, in a conventional endoscope treatment tool, the tightly wound coil pile forming the shaft is coarsely wound only at the distal end, and the coarsely wound portion of the coil pipe is curved by pulling the operation wire. Was. [0004] However, in the case where the operating wire is pulled to bend the coarsely wound portion of the coil pipe as described above, it is difficult to obtain a sufficient bending angle, and Since the operation force is heavy and the operation wire is liable to be broken, the practicability is poor. Accordingly, an object of the present invention is to provide a treatment tool for an endoscope capable of bending a shaft at a desired angle by a light operation. In order to achieve the above object, an endoscope treatment tool according to the present invention is provided with an operation wire insertion lumen penetrated in the axial direction near an outer edge portion. And a multi-lumen tube made of a resilient material having a main lumen penetrated in the axial direction in the vicinity of the center for use in endoscopic treatment, and the operation wire insertion lumen is substantially A plurality of cuts having a width gradually increasing toward the outside cut from the outer edge side so as to be cut vertically are arranged in the same direction at intervals in the axial direction, and one of the shafts is formed by the multi-lumen tube. The multi-lumen tube is bent in a range where the cut is formed by forming a portion and pulling the operation wire inserted through the operation wire insertion lumen. It is characterized by the following. An embodiment will be described with reference to the drawings. FIG.
The distal end portion of the biopsy forceps for an endoscope is shown, and most of the shaft is formed by a flexible coil pipe 1 formed by tightly 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 flexible, flexible and resilient material such as silicon rubber, for example, is connected with a connecting tube 3
And forms 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 operating portion 6 that opens and closes a pair of forceps cups 4 with a link mechanism 5 is connected to the distal ends of the pair. 7 is
A support for the distal end working unit 6, which supports the forceps cup 4 so that it can be opened and closed, and is connected and fixed 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 penetrate the multi-lumen tube 2 in the axial direction on the upper and lower sides near the outer edge of the multi-lumen tube 2. Has been drilled. An operation wire 9 inserted into the operation wire insertion lumen 21 from the coil pipe 1 so as to be able to advance and retreat.
Is a multi-lumen tube 2 as shown in FIG.
At the front end of the multi-lumen tube 2 through the peripheral portion thereof, where the multi-lumen tube 2
It is stuck to. At the center of the multi-lumen tube 2, a main lumen 22 is bored through the multi-lumen tube 2 in the axial direction.
An opening / closing operation wire 11 for opening / closing is inserted to be able to advance and retreat. Further, the multi-lumen tube 2 has a V-shaped notch 2 whose width gradually increases outward.
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 outward. The notches 24 are turned at equal intervals in the axial direction of the multi-lumen tube 2 by 180 degrees,
Therefore, a plurality are formed alternately up and down. In this embodiment, four cuts 24 are arranged vertically. Each cut 24 formed by cutting the multi-lumen tube 2 from the outer edge side cuts the operation wire insertion lumen 21 vertically from the side, and the tip of each cut 24 is formed by the multi-lumen tube 2.
3, the main lumen 22 is partially cut away. As described above, the operation wire insertion lumen 2
1 is cut from the side, and one of the operation wires 9 inserted into the operation wire insertion lumen 21 is pulled from an operation unit on the base 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 cut 24 on the side of the pulled operation wire 9 becomes narrow, and smoothly curves 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 advanced and retracted from the operation section side. Thereby, the forceps cup 4 can be opened and closed arbitrarily. FIG. 4 shows an operating portion connected to the proximal end of the coil pipe 1. The other end of the connecting cylinder 31 to which the proximal end of the coil pipe 1 is fixed is screwed to the operating portion frame 30. Are linked. On the other end side of the operation unit frame 30,
An operation finger rest 32 is attached. A slider 33 with a finger hook attached to the coil pipe 1 so as to be able to advance and retreat in the axial direction indicated by the arrow C.
The opening / closing operation wire 11 is fixed to the tip of the. Therefore, by operating the slider 33 forward and backward, the opening / closing operation wire 11 advances and retracts, and the forceps cup 4 can be opened and closed. An operation lever 3 with a finger hook which is turned around the rotation shaft 34 as shown by an arrow D.
5 is connected to the proximal ends of the operation wires 9 on both sides of the rotary shaft 34 with the rotary shaft 34 interposed therebetween. Therefore, the operating lever 35 is connected to the rotating shaft 34.
By rotating around the center, one of the pair of operation wires 9 can be pulled by an arbitrary amount, and the tip of the multi-lumen tube 2 can be bent by an arbitrary angle. FIG. 5 shows an embodiment in which the present invention is applied to a cytodiagnosis brush. In this embodiment, the configuration of the coil pipe 1 and the multi-lumen tube 2 is the first configuration.
The bending operation is the same as that of the first embodiment. In this embodiment, an advancing / retracting 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 disposed so as to protrude forward from the tip of the multi-lumen tube 2, and a brush is provided at that portion. 42 are planted. Therefore, the cell can be collected by reciprocating the brush 42 in the axial direction by operating the advance / retreat operation wire 41 from the operation section side. 43
Is a stopper fixed to the advance / retreat operation wire 41.
The distal ends of the upper and lower two operation wires 9 are respectively connected to distal end caps 44 fixed to the distal end of the multi-lumen tube 2.
Attached to. FIG. 6 shows a treatment tool 1 according to the present invention, such as the above-mentioned biopsy forceps, cytology brush, or contrast medium injection tube.
The treatment instrument 100 having the distal end sent out into the body cavity through the treatment instrument insertion channel 201 of the endoscope 200 has a desired state by changing the direction of the distal end portion to an arbitrary angle. Can accurately target the affected area from the front. [0029] Then, as shown in FIG. 6, the endoscope 2
00 can be easily inserted into a narrow hole or the like that opens in the side wall of the lumen into which the 00 has been inserted. In the case of a branch at the back of the hole, the direction of the tip can be arbitrarily adjusted to select the traveling direction. can do. According to the present invention, by pulling the operating wire, the multi-lumen tube is elastically deformed in the direction in which the cut widths arranged in a plurality in the same direction at intervals are reduced. The portion can be smoothly curved, and the cut has a lumen 2 for inserting an operation wire.
1 is formed so as to be cut from the side, the operation wire 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 part can be easily aimed from the front in the body cavity through the treatment instrument insertion channel of the endoscope, and a predetermined treatment can be accurately performed. Can be easily inserted into
The present invention is not limited to biopsy, cytology, and contrast imaging, and can be applied to a treatment tool for performing various types of endoscopic procedures.

BRIEF DESCRIPTION OF THE 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 distal end 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 sectional view of the operation unit of the first embodiment. FIG. 5 is a side sectional view of a distal end portion of the second embodiment. 6 is a schematically shown diagram showing an example of a use state of the treatment instrument of the present invention. [Description of Signs] 2 Multi-lumen tube 9 Operation wire 21 Operation wire insertion lumen 21 22 Main lumen 22 24 Cut

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) A61B 1/00-1/32 A61B 17/00-17/326

Claims (1)

(57) [Claims] [Claim 1] A part near the center for use in endoscopic procedures
A main lumen that is provided through in the axial direction position, the
Penetrates axially near the outer edge of the symmetrical position across the main lumen
The multi-lumen tube made of a resilient material having a drilled manipulation wires insertion lumen through, gradually toward the outer side you cut each substantially vertically above a pair of operation wires inserted through lumens Multiple shapes with wide width
Cut from the outer edge side
For endoscopes with a shaft made of a lumen tube
In the treatment tool, two adjacent lumens located in the same direction with respect to the main lumen
So that there is a cut in the opposite direction between the cuts in
A plurality of notches are spaced from each other in the axial direction and
A plurality portions arranged alternately, and wherein said multi-lumen tube in a range in which the incision is formed by pulling operation of the operation wire inserted through the above-described operation wire insertion lumen has a so that to bending Endoscope treatment tool.