JP2002369821A - Endoscope clip device - Google Patents

Abstract

(57) [Problem] To provide an endoscope clip device capable of retaining a clip while accurately sandwiching a target affected part. A clip (2) is detachably connected to a distal end of an operation wire (3) disposed at an axial position of a sheath (1), and a clip closing ring that engages the clip (2) to maintain the clip (2) in a closed state. And a fixed needle 4n protruding into the clip 2 from the vicinity of the base of the clip 2 toward the distal end in the clip device for an endoscope arranged so as to be detachable from the sheath 1 near the distal end of the sheath 1. Was.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clip device for an endoscope which is used to pass through a treatment tool insertion channel of an endoscope and is used for stopping blood in a body.

[0002]

2. Description of the Related Art In general, a clip device for an endoscope generally includes a clip detachably connected to a distal end of an operation wire disposed at an axial position of a flexible sheath and engaging the clip by engaging the clip. A clip closing ring is provided for maintaining the closed state.

[0003] In a state where an affected part such as a blood vessel of a bleeding source is located between the clips, a clip closing ring is engaged with the clip by remote operation from the proximal end side of the flexible sheath, and the affected part is removed. The clip can be placed in a state of being sandwiched.

[0004]

However, in the above-described conventional endoscope clip device, the clip is opened and positioned in front of the affected part such as a blood vessel to be stopped by the clip, and then the clip closing ring is closed. It is not unusual for the positional relationship between the clip and the affected part to be shifted during the operation of closing the clip by using, and it is not possible to reliably stop bleeding at the bleeding site.

Accordingly, an object of the present invention is to provide a clip device for an endoscope in which a clip can be placed while maintaining a state in which a target diseased part is accurately pinched.

[0006]

In order to achieve the above object, an endoscope clip device according to the present invention comprises a clip detachably connected to a distal end of an operation wire disposed at an axial position of a sheath. A clip closing ring that is engaged with the clip to maintain the clip in a closed state is disposed near the distal end of the sheath so as to be detachable from the sheath, and is not engaged near the base coupling portion of the clip. In an endoscope clip device in which an operation operation transmitting member for engaging a clip closing ring near the base end connection portion of the clip by remote operation from the base end side of the sheath is inserted through the sheath, from the vicinity of the base of the clip. A fixed needle protruding into the clip is provided toward the distal end.

[0007] When the clip is detached from the sheath, the fixed needle may be attached so as to remain on the sheath side.

[0008]

Embodiments of the present invention will be described with reference to the drawings. 1 and 2 show a distal end portion of an endoscope clip device. FIG. 1 is a front cross-sectional view, and FIG. 2 is a side cross-sectional view. A flexible sheath 1 inserted into and removed from a treatment tool insertion channel of an endoscope (not shown) is formed of, for example, a tetrafluoroethylene resin tube. ing.

An operating section (not shown) is connected to the proximal end of the flexible sheath 1, and an operating wire 3 for performing an axial retreat operation at the operating section is connected to the axis of the flexible sheath 1. The position is inserted through almost the entire length.

A clip connecting hook 4 is connected to a distal end portion of the operation wire 3 via a connecting member 5, and a base end connecting portion 2 c of the clip 2 is hooked on a hook-like portion at the distal end of the clip connecting hook 4. It is connected to.

The clip 2 is formed, for example, by bending a stainless steel plate material for a spring or the like, and is formed of a pair of arms 2a extending forward from a base end connecting portion 2c formed in an α shape. A claw-shaped portion 2b is formed at each tip portion so as to be bent inward and project.

FIG. 1 shows a state in which the clip 2 is spread by a solid line, but when the flexible sheath 1 is inserted into a treatment tool insertion channel of an endoscope, it is shown by a two-dot chain line. The clip 2 is stored in the distal end of the flexible sheath 1 in a state where the clip 2 is elastically deformed and narrowed.

Since the base end portion of the clip connecting hook 4 is rotatably connected to a support pin 5a protruding from the connecting member 5, the operation wire 3 is slightly forwardly sent out. , Clip connecting hook 4
Can be easily disengaged from the clip 2 by tilting the posture. However, the engagement with the clip 2 may be released by deforming or breaking the tip portion of the clip connecting hook 4.

From the tip of the clip connecting hook 4, the fixed needle 4 is moved toward an intermediate position between the pair of arms 2 a of the clip 2.
n are protruded. A gap through which the fixed needle 4n passes is formed in the base end connecting portion 2c of the clip 2, and the length of the fixed needle 4n is shorter than the arm portion 2a and is accommodated in the clip 2.

In the flexible sheath 1, a flexible ring operation tube 7 which is advanced and retracted from the base end side is disposed along the inner surface of the flexible sheath 1, and a clip is provided at the distal end thereof. 2
A short cylindrical clip closing ring 6 for deforming the base connecting portion 2c is attached. Although the ring operation tube 7 is formed of a flexible tube, a tightly wound coil or the like may be used.

The clip closing ring 6 is detachably fitted into the distal end portion of the ring operation tube 7 in a forward direction. The clip 2 is pulled by the base end connecting portion 2c of the clip 2 being pulled into the clip closing ring 6. Deform and open and close.

At this time, when only the base end connecting portion 2c is pulled into the clip closing ring 6, the arm portion 2a is greatly opened, and the arm portion 2a is drawn into the clip closing ring 6 as a result. The arm 2a is closed.

The clip closing ring 6 is filled with a low-adhesive pressure-sensitive adhesive 9 for preventing the clip 2 connected to the tip of the clip connecting hook 4 from rattling. However, when the clip 2 is pulled into the clip closing ring 6, the adhesive 9 is thereby pushed inward.

In the endoscope clip device thus configured, the flexible sheath 1 is passed through the treatment tool insertion channel of the endoscope (not shown), and the clip 2 is moved from the distal end of the flexible sheath 1. Keep it in the forward position.

When the distal end of the flexible sheath 1 protrudes from the distal end of the endoscope, the operating wire 3 and the flexible sheath 1 are pulled back toward the user (or the ring operating tube 7 is pushed out). As shown in FIG. 3, the base end connecting portion 2c of the clip 2 is drawn into the clip closing ring 6, and the clip 2 is largely spread.

In this state, the fixed needle 4n is projected forward from the arm 2a, so that the clip 2 is properly inserted into the target affected part 100 by piercing the fixed needle 4n into the affected part 100. You cannot move from the position.

Therefore, when the operating wire 3 is strongly pulled from the operating portion side (or the ring operating tube 7 is pulled), the arm 2a of the clip 2 is drawn into the clip closing ring 6 and closed, thereby achieving a target. The blood vessel of the diseased part 100 is sandwiched between the nail-shaped parts 2b (see FIG. 4).

In this state, as shown in FIG. 4, the clip connecting hook 4 is detached from the clip 2 and the entire portion on the flexible sheath 1 side is pulled out to the hand side. Fixed needle 4n protruding from
Is retracted from the diseased part 100 together with the flexible sheath 1, the clip 2 is placed together with the clip closing ring 6 in a state where the blood vessel of the diseased part 100 is sandwiched, and the blood is stopped.

[0024]

According to the present invention, by providing a fixed needle projecting into the clip from the vicinity of the base of the clip toward the distal end side, the fixed needle is pierced into the target diseased part with the clip opened. Then, by closing the clip, the clip can be placed while maintaining a state where the target affected part is accurately pinched.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a distal end portion of an endoscope clip device according to an embodiment of the present invention.

FIG. 2 is a side sectional view of a distal end portion of the endoscope clip device according to the embodiment of the present invention.

FIG. 3 is a front cross-sectional view of a distal end portion when the clip device for an endoscope according to the embodiment of the present invention shifts to an indwelling state.

FIG. 4 is a front sectional view of the clipping device for an endoscope according to the embodiment of the present invention in an indwelling state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flexible sheath 2 Clip 3 Operation wire 4 Clip connection hook 4n Fixed needle 6 Clip closing ring 7 Ring operation tube

Claims (2)

[Claims] 1. A clip detachably connected to a distal end of an operation wire disposed at an axial position of a sheath, and a clip closing ring that engages with the clip to maintain the clip in a closed state. The clip closing ring, which is disposed near the distal end of the sheath so as to be detachable from the sheath and is not engaged near the proximal connection portion of the clip, is remotely operated from the proximal side of the sheath. An endoscope clip device in which an operation motion transmitting member to be engaged near the base end coupling portion is inserted through the sheath, and fixedly protruding into the clip from near the base portion of the clip toward the distal end side. An endoscope clip device comprising a needle. 2. The endoscope clip device according to claim 1, wherein the fixed needle is attached so as to remain on the sheath side when the clip is detached from the sheath.