JP2002248173A - Endoscopic tubular treatment tool - Google Patents

Abstract

(57) [Problem] To provide a tubular treatment for an endoscope that can be arbitrarily changed in direction of a distal end by an operation from a hand side and inserted into a target bifurcated duct in a deep part of a bile duct or a bronchus. Providing utensils. A cutting wire (3) is formed in the vicinity of the distal end of a flexible tube (1) so as to cross the flexible tube (1) in the radial direction, and an operation wire (2) is movable in the flexible tube (1) in the axial direction. And the distal end of the operation wire 2 was fixed to the flexible tube 1 on the front side of the cutting groove 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art There is a contrast tube for injecting a contrast agent as a typical example of a tube-shaped treatment tool for an endoscope. It is formed of a flexible tube made of ethylene fluoride resin or the like, and an injection mouthpiece is attached to a hand side thereof. Further, there is a flexible tube in which a tip or the like is attached to the distal end of the flexible tube, or a flexible tube in which a core metal is inserted and arranged to prevent breakage of the hip.

[0003]

The endoscope tubular treatment tool is used by being inserted into a treatment instrument insertion channel of the endoscope, but the direction of the distal end protruding from the endoscope can be freely changed. I can't control it.

Therefore, conventionally, a desired bending habit has been formed in advance at the distal end portion of the flexible tube. However, for example, a tube-like treatment is performed on a target bifurcation tube located deep in the bile duct or bronchus. It was very difficult to insert the tip of the tool.

Accordingly, the present invention provides a tube-shaped treatment instrument for an endoscope which can be arbitrarily changed in the direction of the distal end by an operation from the proximal side and can be inserted into a target bifurcation, such as a bile duct or a deep part of a bronchus. The purpose is to provide.

[0006]

Means for Solving the Problems In order to achieve the above-mentioned object, a tube-shaped treatment instrument for an endoscope according to the present invention is a tube-shaped treatment instrument for an endoscope having a flexible tube shape as a whole. A cutting groove is formed in the vicinity of the distal end of the flexible tube so as to cross the flexible tube in the radial direction, and an operation wire is inserted and arranged in the flexible tube so as to be able to advance and retreat in the axial direction. The tip is fixed to the flexible tube at a position ahead of the cutting groove.

[0007] If the cross section of the cut groove is substantially V-shaped, the flexible tube bends smoothly. Further, a tissue sampling member may be attached to the distal end of the flexible tube.

[0008]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a tubular treatment tool for an endoscope according to a first embodiment of the present invention.

Reference numeral 1 denotes a flexible tube which is inserted into and removed from a treatment tool 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. A tetrafluoroethylene resin tube or a polyethylene resin tube is used.

In the vicinity of the distal end of the flexible tube 1, there is formed a cutting groove 3 having a substantially V-shaped cross section which crosses the flexible tube 1 in the radial direction. In addition, the flexible tube 1
Inside, an operation wire 2 formed of, for example, a stranded stainless steel wire is inserted and disposed over the entire length so as to be able to advance and retreat in the axial direction.

At the tip of the flexible tube 1, a metal tip 4 having a through hole in the axial direction is fixed. Then, the distal end of the operation wire 2 is fixed to the inner peripheral surface of the distal end tip 4 by silver brazing or the like, whereby the distal end of the operation wire 2 is fixed to the distal end portion of the flexible tube 1. I have.

In the operating section 10 connected to the base end (hand side end) of the flexible tube 1, a connecting tube 12 is connected to the side of the main body tube 11 to which the base end of the flexible tube 1 is connected and fixed. Is connected to a connecting tube 12 so that a contrast agent or other liquid can be delivered through the flexible tube 1 or the flexible tube 1 Can be sucked through.

The operation wire 2 passes straight through the inside of the main body tube 11 to the rear, and a finger hook 14 is connected to a protruding end thereof.
The operation wire 2 is covered with a reinforcing pipe 15 made of a stainless steel pipe for preventing a buckling.

Therefore, the finger hook 1 is
The operation wire 2 moves in the flexible tube 1 in the axial direction by moving the 4 forward and backward. 13 is the main body cylinder 11
This is an O-ring disposed in close contact with the outer peripheral surface of the reinforcing pipe 15 in order to seal between the inside and the space on the finger hook 14 side.

In the tubular treatment instrument for an endoscope of the embodiment configured as described above, when the operation of pulling the operation wire 2 by the finger hook 14 is performed, as shown in FIG.
The distal end portion of the flexible tube 1 is bent toward the cutting groove 3 in the cutting groove 3. The maximum bending angle can be set arbitrarily according to the shape of the cutting groove 3.

When the operation of pushing the operation wire 2 from the hand side is performed, the distal end portion of the flexible tube 1 returns to the original straight state, and from this state, the operation wire 2 is further moved.
As shown in FIG. 3, the distal end portion of the flexible tube 1 is bent in the cutting groove 3 toward the back side of the cutting groove 3.

Therefore, by using the endoscope tubular treatment tool of this embodiment, as shown in FIG. 4, the flexible tube 1 protrudes from the treatment instrument insertion channel 51 of the endoscope 50. Can be bent and inserted into a target bifurcation duct in a deep part of a bile duct or a bronchus. At this time, since observation with the endoscope 50 is not possible, the observation may be performed under X-ray fluoroscopy while sending the contrast agent through the flexible tube 1.

The present invention is not limited to the above-described embodiment. For example, there are various embodiments for fixing the distal end of the operation wire 2 and, as shown in FIG. 5, a distal end formed in a heart shape. The distal end of the operating wire 2 may be fixed to the distal end of the flexible tube 1 by press-fitting the distal end of the operating wire 2 to the concave portion on the outer surface of the tip 4 ′.

Also, there are various embodiments of the shape of the cutting groove 3. For example, as shown in FIG. 6, if a V-shaped protruding end portion has a width, bending becomes easy, and as shown in FIG. If the inclined surface on the side closer to the tip of the V-shape is greatly inclined so that the flexible tube 1 is pulled into the treatment instrument insertion channel 51, cutting is performed at the outlet opening of the treatment instrument insertion channel 51. The groove 3 is hardly caught.

Also, as shown in FIGS. 8 and 9, for example, by attaching a tissue sampling member such as a sharp spoon 4A or a brush 4B to the distal tip 4, a target located in a deep part of the bile duct or bronchus can be obtained. Tissue can be obtained endoscopically from a branch pipe or the like.

In this case as well, by guiding the flexible tube 1 while injecting a contrast agent from the connection tube 12, an X-ray fluoroscopic image can be formed on a deep conduit at a position where direct observation is not possible with an endoscope. You can insert it while watching.

In general, a treatment instrument for an endoscope for performing tissue collection has a metal coil having a strong linearity as a sheath. However, by using the flexible tube 1 as the sheath, a bile duct or the like can be used. Insertion along a curve such as a bronchus is facilitated, and selective insertion into a deep portion is facilitated by applying the present invention.

[0023]

According to the present invention, the distal end of the flexible tube can be bent in a predetermined direction by operating the operating wire forward and backward from the proximal side. It can be inserted all the way down to the target branch tube at the deep part of the bronchi.

[Brief description of the drawings]

FIG. 1 is a side cross-sectional view showing an overall configuration of a tube-shaped treatment tool for an endoscope according to a first embodiment of the present invention.

FIG. 2 is a side 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.

FIG. 3 is a side sectional view of the endoscope tubular treatment tool according to the first embodiment of the present invention, in which a distal end portion is bent to the opposite side.

FIG. 4 is a schematic view showing a use state of the endoscope tubular treatment tool 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 a tubular treatment tool for an endoscope according to a third embodiment of the present invention.

FIG. 7 is a side view showing a cutting groove of a tubular treatment tool for an endoscope 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 spoon is attached to the distal end of the endoscope tubular treatment tool according to the 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 the endoscope tubular treatment tool according to the 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 spoon 4B Brush 10 Operation part 11 Main body cylinder 12 Connection cylinder 14 Finger hook

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) A61M 25/01 A61M 25/00 309B

Claims (3)

[Claims] An endoscope tube-shaped treatment instrument having a flexible tube shape as a whole, wherein a cutting groove radially crossing the flexible tube is formed in a portion near the distal end of the flexible tube. In addition to the above, an operation wire is inserted and arranged in the flexible tube so as to be able to advance and retreat in the axial direction, and the tip of the operation wire is fixed to the flexible tube at a position ahead of the cutting groove. Endoscope tubular treatment tool. 2. The endoscopic tube-shaped treatment tool according to claim 1, wherein the cross-sectional shape of the cutting groove is substantially V-shaped. 3. The endoscopic tubular treatment tool according to claim 1, wherein a tissue sampling member is attached to a distal end of the flexible tube.