JP2002360585A - 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 the vicinity of the base connection part (2c) of the clip (2). In a clip device for an endoscope in which a clip closing ring 6 for keeping an arm 2a closed by being fitted thereto is disposed near the distal end of the sheath 1 so as to be detachable from the sheath 1, the base end connection of the clip 2 When the vicinity of the portion 2c is fitted into the clip closing ring 6,
Friction surfaces 2e, 6e for preventing the vicinity of the base end connecting portion 2c of the clip 2 from coming out of the clip closing ring 6 are provided on the contact surface between the base end connecting portion 2c of the clip 2 and the clip closing ring 6.

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. A clip formed so as to be opened and closed, and a clip closing ring for fitting the vicinity of the base end connecting portion of the clip to maintain the arm in a closed state are disposed near the distal end of the sheath so as to be detachable from 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 placed endoscope clip device, when the vicinity of the base connection portion of the clip is fitted into the clip closing ring, the vicinity of the base connection portion of the clip may be closed by the clip closing ring. The friction surface to prevent the break out, but on the contact surface between the near basal end connecting portion of the clip and the clip closed ring.

[0008] The frictional force generated on the friction surface when the vicinity of the base connection portion of the clip tries to slip out of the clip closing ring is generated when the vicinity of the base connection portion of the clip is fitted into the clip closing ring. The friction surface may be formed so as to be larger than the friction force generated on the friction surface.

[0009]

Embodiments of the present invention will be described with reference to the drawings. FIG. 2 shows the entire configuration of a clip device for an endoscope according to a first embodiment of the present invention. For example, a clip 2 is disposed at a distal end portion of a flexible sheath 1 made of a tetrafluoroethylene resin tube or the like. Have been.

In FIG. 2, the clip 2 has a portion near the base end accommodated in the distal end of the sheath 1, and is formed with a pair of arms 2a in an open state and projecting inward from each distal end thereof. The claw-shaped portion 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. 1 is an enlarged view of the distal end portion of the sheath 1. In this figure, a clip in a natural state (ie, a state in which the pair of arms 2a are parallel) when no external force is applied. 2 is almost completely retracted into the sheath 1.

The clip 2 is formed, for example, by bending a stainless steel plate for a spring or the like, and has a claw-like portion 2b which is bent inward and protrudes from each end of a pair of arms 2a.

The base ends of the pair of arms 2a are approximately 360 °
The arm 2a is opened and closed by deforming the base connection part 2c.

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 the 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 via a connecting member 5.

The clip connecting hook 4 is connected to the clip 2 by engaging a distal end formed in a U-shape with a base connecting portion 2c of the clip 2.
Therefore, by sending the operation wire 3 forward slightly larger, the clip connecting hook 4
Can be disengaged. However, the engagement with the clip 2 may be released by deforming or breaking the distal end portion of the clip connecting hook 4.

In the distal end of the sheath 1, there is disposed a short cylindrical clip closing ring 6 for deforming the proximal connecting portion 2c of the clip 2, and the proximal connecting portion 2c of the clip 2 is provided.
Is deformed by being drawn into and fitted into the clip closing ring 6.

A so-called knurled shape, in which a large frictional force is generated when the outer surface portion of the base end connecting portion 2c of the clip 2 and the base end portion of the inner peripheral surface of the clip closing ring 6 come into contact with each other. Friction surface 2 consisting of uneven surface
e, 6e are formed.

The ring receiving member 8 into which the base end portion of the clip closing ring 6 is removably fitted is connected to the main body shaft 23 of the operating section 20 by a ring extrusion coil 7 made of a tightly wound coil of, for example, a stainless steel wire. It is fixed to the tip of.

In the endoscope clip device configured as described above, the sheath 1 is passed through the treatment tool insertion channel of the endoscope (not shown) so that the clip 2 projects forward from the distal end of the sheath 1. Then, the clip closing ring 6 is pushed out from the operation unit 20 side (or the operation wire 3 is pulled from the operation unit 20 side).

Then, as shown in FIG. 3, first, the base end connecting portion 2c of the clip 2 is pulled into an intermediate position in the clip closing ring 6 and deformed, so that the pair of arms 2a is formed. Change to open state.

In this state, the affected part is positioned between the pair of arms 2a, and the clip closing ring 6 is pushed out from the operation unit 20 side. As shown in FIG.
Pushes the pair of arms 2a of the clip 2 from the back side,
As a result, the pair of arms 2a is closed in parallel, and the nail-like portion 2b is in a state of piercing the mucous membrane of the affected part 100.

Then, the clip connecting hook 4 is detached from the clip 2 and the entire portion on the sheath 1 side is pulled out close to the hand, so that the clip 2 together with the clip closing ring 6 is attached to the affected part 100 as shown in FIG. Detained in a state of biting the mucous membrane.

In this indwelling state, the base connecting portion 2c of the clip 2 is fitted to an inner position near the base of the clip closing ring 6. As a result, the friction surface 2e formed on the clip 2 side and the friction surface 6e formed on the clip closing ring 6 are in close contact with each other, and there is a force (reaction force) generated by the elastic deformation of the base end connecting portion 2c. ) Works.

As a result, the frictional force generated between the two friction surfaces 2e and 6e prevents the base end connecting portion 2c of the clip 2 from moving out of the clip closing ring 6, so that the clip is not affected by external force. The engagement of the clip closing ring 6 with the clip 2 is not released, so that the clip 2 does not easily fall off the affected part 100.

FIG. 6 shows the inclining state of the clip 2 according to the second embodiment of the present invention, and the friction surface 2e on the clip 2 side.
And a friction surface 6e on the side of the clip closing ring 6 are each formed in a sawtooth cross-sectional shape.

As a result, the frictional force generated on the friction surfaces 2e, 6e when the proximal connecting portion 2c of the clip 2 tries to come out of the clip closing ring 6 closes the proximal connecting portion 2c of the clip 2. It becomes larger than the frictional force generated during the operation of fitting into the ring 6, and the clip 2 is easily fitted into the clip closing ring 6 and hardly comes off.

[0028]

According to the present invention, when the vicinity of the base end connecting portion of the clip is fitted into the clip closing ring, the state is prevented from being released by the frictional force generated on the friction surface, and the clip is closed. Since the clipped state is maintained, the clip during placement does not easily fall off the affected part by the action of external force or the like, and excellent placement properties can be obtained.

[Brief description of the drawings]

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

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

FIG. 3 is a side cross-sectional view showing an open state of the clipping operation of the clip device for an endoscope according to the first embodiment of the present invention in opening and closing operations.

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

FIG. 6 is a side sectional view showing a state where a clip of the endoscope clip device according to the second embodiment of the present invention is placed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sheath 2 Clip 2a Arm part 2c Base end connection part 2e Friction surface 3 Operation wire (operation operation transmission member) 4 Clip connection hook 6 Clip closing ring 6e Friction surface 7 Ring pushing coil (operation operation transmission member) 20 Operation part

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 fitting around the base connection part of the clip. And 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 near the base connecting portion of the clip. An endoscope clip device in which an operation operation transmitting member for engaging a ring near a proximal end connecting portion of the clip by remote operation from a proximal end side of the sheath is inserted through the sheath and includes: Friction that prevents the vicinity of the base connection portion of the clip from coming out of the clip closing ring when the vicinity of the end connection portion is fitted into the clip closing ring. A clip device for an endoscope, wherein a surface is provided on a contact surface between a vicinity of a base end connecting portion of the clip and the clip closing ring. 2. A friction force generated on the friction surface when an operation near the base connection portion of the clip tries to escape from the clip closing ring causes the vicinity of the base connection portion of the clip to be applied to the clip closing ring. The clip device for an endoscope according to claim 1, wherein the friction surface is formed so as to be larger than a friction force generated on the friction surface during the fitting operation.