JP4786807B2 - Endoscopic tube treatment device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an endoscope tube-shaped treatment instrument that is used by being inserted into a treatment instrument insertion channel of an endoscope.
[0002]
[Prior art]
There is a contrast tube for injecting a contrast agent as a representative example of a tubular treatment instrument for an endoscope, but a conventional endoscope contrast tube is made of a single tetrafluoroethylene resin or the like as a whole. It is formed of a flexible tube, and an injection cap is attached to the proximal side. In addition, there are those in which a tip or the like is attached to the distal end of the flexible tube, and those in which a core metal is inserted to prevent hip breakage.
[0003]
[Problems to be solved by the invention]
The tube-shaped treatment instrument for endoscope is used by being inserted into the treatment instrument insertion channel of the endoscope, but the direction of the distal end portion protruding from the endoscope cannot be freely controlled.
[0004]
Therefore, in the past, a desired bent fold was formed in advance on the distal end portion of the flexible tube. For example, the distal end of the tube-like treatment instrument is placed on a target branch pipe in the deep part of the bile duct or bronchus. It was very difficult to insert.
[0005]
Therefore, the present invention provides an endoscopic tube-like treatment instrument that can be inserted into a target branching tube in the deep part of the bile duct or bronchus by arbitrarily changing the direction of the tip by an operation from the hand side. For the purpose.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, an endoscope tube-shaped treatment instrument of the present invention is an endoscope tube-shaped treatment instrument having a flexible tube shape as a whole. In addition to forming a cutting groove that traverses the flexible tube in the radial direction, an operation wire is inserted and disposed in the flexible tube so as to be able to advance and retreat in the axial direction, and the tip of the operation wire can be positioned ahead of the cutting groove. It is fixed to the flexible tube.
[0007]
Note that the flexible tube bends smoothly when the cross-sectional shape of the cutting groove is substantially V-shaped. In addition, a tissue collection member may be attached to the tip of the flexible tube.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an endoscopic tubular treatment tool according to a first embodiment of the present invention.
[0009]
Reference numeral 1 denotes a flexible tube that is inserted into and removed from a treatment instrument insertion channel of an endoscope (not shown), and has an outer diameter of about 1.5 to 2.5 mm and a length of about 1 to 2 m. An ethylene resin tube or a polyethylene resin tube is used.
[0010]
A cutting groove 3 having a substantially V-shaped cross section that crosses the flexible tube 1 in the radial direction is formed in the vicinity of the distal end of the flexible tube 1. An operation wire 2 formed of, for example, a stainless steel stranded wire is inserted through the entire length of the flexible tube 1 so as to freely advance and retract in the axial direction.
[0011]
A metal tip 4 having a through hole in the axial direction is fixed to the tip of the flexible tube 1. Then, the distal end of the operation wire 2 is fixed to the inner peripheral surface of the distal tip 4 by silver brazing or the like, so that the distal end of the operation wire 2 is fixed to the distal end portion of the flexible tube 1. Yes.
[0012]
In the operation unit 10 connected to the base end (hand side end portion) of the flexible tube 1, the connection tube 12 projects from the side portion of the main body tube 11 to which the base end of the flexible tube 1 is connected and fixed. By connecting a syringe or the like (not shown) to the connection tube 12, a contrast medium or other liquid can be sent out through the flexible tube 1, or suction is performed through the flexible tube 1. can do.
[0013]
The operation wire 2 passes straight back through the main body cylinder 11 and has a finger hook 14 connected to the protruding end thereof. In the portion from the main body cylinder 11 to the finger hook 14, the operation wire 2 is made of stainless steel for preventing hip breakage. A steel pipe reinforcing pipe 15 is covered.
[0014]
Therefore, when the finger hook 14 is moved back and forth with respect to the main body cylinder 11, the operation wire 2 moves back and forth in the axial direction within the flexible tube 1. Reference numeral 13 denotes an O-ring disposed in close contact with the outer peripheral surface of the reinforcing pipe 15 in order to seal between the inside of the main body cylinder 11 and the space on the finger hook 14 side.
[0015]
In the endoscope tube-shaped treatment instrument of the embodiment configured as described above, when an operation of pulling the operation wire 2 by the finger hook 14 is performed, as shown in FIG. Is bent toward the cutting groove 3 in the cutting groove 3. The maximum bending angle can be arbitrarily set according to the shape of the cutting groove 3.
[0016]
Then, when the operation wire 2 is pushed from the hand side, the distal end portion of the flexible tube 1 returns to the original straight state, and when the operation wire 2 is pushed further from this state, as shown in FIG. The distal end portion of the flexible tube 1 bends in the direction of the back side of the cutting groove 3 in the cutting groove 3.
[0017]
Therefore, by using the tube-shaped treatment instrument for an endoscope of this embodiment, as illustrated in FIG. 4, the distal end of the flexible tube 1 projected from the treatment instrument insertion channel 51 of the endoscope 50 ( The distal tip 4) can be bent and inserted into the target branch tube in the deep part of the bile duct or bronchus. In that case, since observation with the endoscope 50 is not possible, it is only necessary to perform fluoroscopy while feeding the contrast agent through the flexible tube 1.
[0018]
The present invention is not limited to the above embodiment. For example, there are various embodiments for fixing the distal end of the operation wire 2, and as shown in FIG. 5, the distal tip 4 'formed in a heart shape. The distal end of the operation wire 2 may be fixed to the outer surface recess of the distal end, and the distal end tip 4 ′ may be press-fitted and fixed in the distal end of the flexible tube 1.
[0019]
Also, the shape of the cutting groove 3 has various embodiments. For example, as shown in FIG. 6, if the V-shaped protruding end portion has a width, it becomes easy to bend, as shown in FIG. If the inclined surface closer to the V-shaped tip is greatly inclined, the cutting groove 3 is formed at the outlet opening of the treatment instrument insertion channel 51 during the operation of drawing the flexible tube 1 into the treatment instrument insertion channel 51. It becomes difficult to get caught.
[0020]
Further, for example, as shown in FIGS. 8 and 9, by attaching a tissue collecting member such as a sharp knife 4A or a brush 4B to the tip 4 portion, a target branch in the deep part of the bile duct or bronchus, etc. Tissue collection can be performed endoscopically from a tube or the like.
[0021]
Also in this case, the flexible tube 1 is guided while injecting a contrast medium from the connecting tube 12, so that it is inserted while viewing the X-ray fluoroscopic image with respect to the deep conduit at a position that cannot be directly observed by the endoscope. can do.
[0022]
Endoscopic treatment tools for collecting tissues generally have a metal coil having a strong straight line holding property as a sheath. By using the flexible tube 1 as a sheath in this way, bile ducts, bronchi, etc. It becomes easy to insert along a curve, and selective application to a deep part becomes easy by application of the present invention.
[0023]
【The invention's effect】
According to the present invention, since the distal end of the flexible tube can be bent in a predetermined direction by moving the operation wire forward and backward from the proximal side, the distal end of the tubular treatment instrument can be placed in the deep part of the bile duct or bronchus. It can be inserted as far as the target branch pipe.
[Brief description of the drawings]
FIG. 1 is a side cross-sectional view showing an overall configuration of an endoscope tube-shaped treatment instrument according to a first embodiment of the present invention.
FIG. 2 is a side cross-sectional view showing a state where the distal end portion of the tubular treatment instrument for an endoscope according to the first embodiment of the present invention is bent.
FIG. 3 is a side cross-sectional view showing a state in which a distal end portion of the tubular treatment tool for an endoscope according to the first embodiment of the present invention is bent to the opposite side.
FIG. 4 is a schematic view showing a use state of the tubular treatment instrument for an endoscope according to the first embodiment of the present invention. FIG.
FIG. 5 is a partial perspective view showing a fixing structure of a distal end of an operation wire of a tubular treatment tool for an endoscope according to a second embodiment of the present invention.
FIG. 6 is a side view showing a cutting groove of an endoscope tubular treatment tool according to a third embodiment of the present invention.
FIG. 7 is a side view showing a cutting groove of an endoscope tube-shaped treatment instrument according to a fourth embodiment of the present invention.
FIG. 8 is a side sectional view of a distal end portion of an example in which a sharp knife is attached to the distal end of an endoscope tube-shaped treatment instrument according to a fifth embodiment of the present invention.
FIG. 9 is a side sectional view of a distal end portion of an example in which a brush is attached to the distal end of an endoscope tube-shaped treatment instrument according to a sixth embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Flexible tube 2 Operation wire 3 Cutting groove 4 Tip 4A Sharp 4B Brush 10 Operation part 11 Main body cylinder 12 Connection cylinder 14 Finger hook

Claims (2)

An endoscopic tube-shaped treatment instrument having a flexible tube shape as a whole,
The flexible tube is a single lumen tube;
A cutting groove that traverses the flexible tube in the radial direction is formed in a portion near the tip of the flexible tube, and the cutting groove is formed in a substantially V shape with a sharp tip or a blunt tip. is it is deeper than the radius of the flexible tube from the side wall outer surface of the flexible tube is,
Freely operating wire forward and backward in the axial direction within the flexible tube is inserted and arranged, the tip of the operation wire is fixed to the flexible tube at the front side than the cutting groove,
When the operation wire is pulled from the proximal end side of the flexible tube, the distal end portion of the flexible tube is bent in the direction of closing the cutting groove at the cutting groove position, and the operation wire is When a push operation is performed from the proximal end side of the flexible tube, the distal end portion of the flexible tube is deformed in a state where the operation wire swells in an opening direction of the cutting groove in a space between the cutting grooves. A tubular treatment instrument for an endoscope, which is bent in a direction to open the cutting groove at a groove position . The tube-shaped treatment tool for an endoscope according to claim 1, wherein a tissue collection member is attached to a distal end of the flexible tube.

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