JP2002345830A - Endoscope clip device - Google Patents

Abstract

(57) [Problem] To provide an endoscope clip device in which a clip closing ring is hardly detached from a clip in an indwelling state, and an excellent indwelling property can be obtained. A clip (2) formed so that a pair of arms (2a) connected on the base end side are opened and closed by deforming the vicinity of the base connection part (2c), and a pair of arms (2a) near the base end connection part (2c) of the clip (2). In a clip device for an endoscope in which a clip closing ring 6 for maintaining an arm portion 2a closed by engagement is disposed near the distal end of the sheath 1 so as to be detachable from the sheath 1, A non-return stopper 6a is formed on the clip closing ring 6 for preventing the engagement from being released when the engagement with the clip 2 is made.

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 to perform hemostasis, ligation or marking in a body.

[0002]

2. Description of the Related Art In general, a clip device for an endoscope is configured such that a pair of arms of a clip are connected at a base end side, and the arms are opened and closed by deforming the vicinity of the base connection portion. I have.

[0003] A clip closing ring is provided to keep the arm portion of the clip closed by engaging it near the base connecting portion of the clip, and the clip closing ring and the clip are arranged near the distal end of the sheath. Is arranged so as to be detachable from the sheath.

[0004] By operating the operating motion transmitting member inserted through the sheath from the proximal end side of the sheath, the clip closing ring not engaged near the proximal end connecting portion of the clip is engaged with the base of the clip. The clip can be retained in a state where the clip is engaged with the vicinity of the end connection portion so as to sandwich the mucous membrane of the affected part or the like.

[0005]

In the conventional clip device for an endoscope constructed as described above, when an external force is applied to the in-dwelling clip closed by the clip closing ring, the clip is closed from the clip. It was not uncommon for the ring to come off, resulting in the clip falling off the mucous membrane.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a clip device for an endoscope in which a clip closing ring is hardly detached from a clip in a detained state, and excellent detainability can be obtained.

[0007]

In order to achieve the above object, an endoscope clip device according to the present invention is characterized in that a pair of arms connected on the proximal end deforms the vicinity of the proximal connection. And a clip closing ring that engages near the base end connecting portion of the clip to maintain the arm in a closed state and is detachably disposed near the distal end of the sheath. An operation transmitting member for engaging the clip closing ring, which is not engaged near the proximal connection portion of the clip, near the proximal connection portion of the clip by remote operation from the proximal end of the sheath is inserted into the sheath. In the arranged endoscope clip device, a check stopper is formed on the clip closing ring to prevent the clip closing ring from being released when the clip closing ring is engaged with the clip. It is intended.

The check stopper is a small-diameter portion formed on the inner peripheral surface of the rear end of the clip closing ring, and has passed through the small-diameter portion in a state where the base connecting portion of the clip has been elastically deformed and collapsed. By expanding at the position, the engagement between the clip closing ring and the clip may be difficult to release.

[0009]

Embodiments of the present invention will be described with reference to the drawings. FIG. 2 shows the overall configuration of the endoscope clip device, in which a clip 2 is arranged at a distal end portion of a flexible sheath 1 made of, for example, a tetrafluoroethylene resin tube.

In FIG. 2, the clip 2 has a base end portion accommodated in the distal end of the sheath 1, and has a pair of arms 2a in an open state and claws formed to protrude inward at respective distal ends thereof. The shape 2b is visible.

An operation unit 20 connected to the proximal end of the sheath 1
The slider 22 is slidably attached to a main body shaft 23 having a finger hook 23a attached to the end, and the proximal cylindrical body 21 of the sheath 1 is slidably disposed independently of the main body shaft 23 and the slider 22. It is configured.

FIG. 3 shows the distal end of the sheath 1 in an enlarged manner. The clip 2 is formed by bending a stainless steel plate for a spring, for example, to form a pair of arms 2a.
The claw-like portion 2b is formed to be bent inward and protrude from each of the tip portions.

The base ends of the pair of arms 2a are connected to each other by a base connecting portion 2c formed in a slightly rectangular α shape, and the arms are formed by deforming the base connecting portion 2c. The part 2a opens and closes. In this figure, the clip 2 is elastically deformed by being pulled into the distal end of the sheath 1, and the arm 2a is in a closed state.

An operation wire 3 which is operated in the axial direction by the above-mentioned slider 22 arranged in the operation section 20 is arranged at an axial position of the sheath 1 so as to be able to advance and retreat in the axial direction. A clip connecting hook 4 that can be disengaged from the clip 2 is attached.

The clip connecting hook 4 is formed with an arcuate slit-like engaging groove 4 a having an open side surface so as to engage with the base end of the clip 2. Therefore, the delivery portion of the operation wire 3 bends simply by sending the operation wire 3 slightly forward of the sheath 1, and at the same time, the clip connecting hook 4 bends and the engagement with the clip 2 is released.

In the distal end of the sheath 1, a short cylindrical clip closing ring 6 for deforming the proximal connecting portion 2c of the clip 2 is arranged. The proximal end portion of the clip closing ring 6 is removably fitted to the distal end portion of the flexible operation tube 7 connected to the main body shaft 23 of the operation portion 20, and the proximal end connecting portion 2c of the clip 2 is It is deformed by being pulled into the clip closing ring 6.

The inner peripheral surface of the clip closing ring 6 has a constant diameter except for the vicinity of the rear end, and only the vicinity of the rear end is formed in a shape tapered outwardly. The position is the small diameter portion 6a.

As a result, the proximal connecting portion 2c of the clip 2
After passing through the clip closing ring 6 in a state of being elastically deformed and crushed, as shown in FIG. 1, the small diameter portion 6a spreads out of the position close to the small diameter portion 6a. This serves as a check stopper for preventing the engagement with the clip 2 from being released, so that the clip closing ring 6 is very hard to come off from the base end connecting portion 2c of the clip 2.

When using the endoscope clip device configured as described above, the sheath 1 is passed through the treatment tool insertion channel of the endoscope (not shown), and as shown in FIG. Is projected forward from the distal end of the sheath 1 so that the pair of arms 2a is opened.

In this state, the affected part 10 is placed between the pair of arms 2a.
0, and when the clip closing ring 6 is pushed out from the operation section 20 side, as shown in FIG. The end connecting portion 2c is deformed, whereby the pair of arms 2a are closed in parallel, and the pair of arms 2a sandwich the affected part 100.

Then, the clip connecting hook 4 is detached from the clip 2 and the member on the side of the sheath 1 is pulled toward the user, so that the clip closing ring 6 is engaged with the clip 2 as shown in FIG. , The clip 2 is the affected part 10
0 is placed in a state of sandwiching the mucous membrane.

In the indwelling state, the base end connecting portion 2c of the clip 2 is connected to the small diameter portion 6 at the rear end of the clip closing ring 6.
In this state, the head is extended outward from the a, and the clip closing ring 6 is prevented from retreating from the clip 2, so that the engagement of the clip closing ring 6 with the clip 2 even when an external force acts. Therefore, the clip 2 does not easily fall off the diseased part 100.

[0023]

According to the present invention, when the clip closing ring is engaged with the clip, the engagement is restricted by the non-return stopper so that the engagement is not released, and the closed state of the clip is maintained. The clip indwelling does not easily fall off from the affected part by the action of external force or the like, and excellent indwelling properties can be obtained.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a closed state in opening and closing operations of a clip of an endoscope clip device according to an embodiment of the present invention.

FIG. 2 is an external view showing the entire configuration of the endoscope clip device according to the embodiment of the present invention.

FIG. 3 is a side sectional view of a distal end portion of the endoscope clip device according to the embodiment of the present invention.

FIG. 4 is a side cross-sectional view showing an open state in opening and closing operations of the clip of the endoscope clip device according to the embodiment of the present invention.

FIG. 5 is a side cross-sectional view showing the indwelling state of the clip of the endoscope clip device according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sheath 2 Clip 2a Arm part 2c Base end connection part 3 Operation wire (operation operation transmission member) 4 Clip connection hook 6 Clip closing ring 6a Small diameter part (return stopper) 7 Flexible operation tube (operation operation transmission member) 20 Operation unit

Claims (2)

[Claims] 1. A clip formed so that a pair of arms connected on the base end side can be opened and closed by deforming the vicinity of the base connection part, and engaging near the base connection part of the clip. A clip closing ring for keeping the arm closed by disposing the clip closing ring near the distal end of the sheath so as to be detachable from the sheath and not engaging the clip near the base coupling portion of the clip An endoscope clip device, wherein an operation transmitting member for engaging a ring near a base end connecting portion of the clip by remote operation from a base end side of the sheath is inserted through the sheath, wherein the clip closing ring Wherein the clip closing ring has a check stopper for preventing the engagement of the clip from being released when the clip is engaged with the clip. Backup device. 2. The non-return stopper is a small-diameter portion formed on an inner peripheral surface of a rear end portion of the clip closing ring, and the base connection portion of the clip is elastically deformed to collapse the small-diameter portion. The clip device for an endoscope according to claim 1, wherein the clip is closed at a position passing through the portion, so that the clip closing ring and the clip are hardly disengaged.