JP2002345827A - Clipping device for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clipping device for an endoscope in which an indwelled clip does not easily come off from an affected region due to an external force, or the like, thus retaining its excellent indwelling property. SOLUTION: In the clipping device for the endoscope, a clip 2 formed to open and close by allowing a pair of arm portions 2a linked with the basic edge to deform a neighboring site of its basic connection 2c, and a clip closing ring 6 that maintains the arm portion 2a in a closed status nearby the basic connection 2c of the clip 2 to be fixed therewith are arranged in a leading edge of a sheath 1 in a status separable from the sheath 1, wherein a member inserted in the sheath 1 and remote controlled from the basic end of the sheath 1 for transmitting the processing movement fixes the clip closing ring 6 in a status not being fixed nearby the basic connection 2c of the clip 2, where a nail-shaped portion 2b is formed to protrude inward from each leading edge of a pair of portions 2a of the clip 2 in a sharp angle toward the arm portion 2a.

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 instrument insertion channel of an endoscope to perform hemostasis, ligation or marking in a body.

[0002]

2. Description of the Related Art As shown in FIG. 6, an endoscope clip device generally includes a clip 2 having a pair of arms 2a which can be opened and closed by deforming a proximal end connecting portion 2c. Are formed in the vicinity of the tip of the arm 2a, and a claw-like portion 2b bent inward is formed at each tip of the arm 2a.

[0003] A clip 2 is provided so that the arm 2a is closed.
A clip closing ring 6 for deforming the base connecting portion 2c is disposed in the distal end of the sheath so as to be detachable from the sheath.

When the clip closing ring 6 is pushed over the base connecting portion 2c of the clip 2 by the operation transmitting member inserted and disposed in the sheath, the arm 2a is closed, as shown in FIG. The clip 2 can be placed in the affected area with the nail 2b piercing the mucous membrane.

[0005]

However, in the conventional clipping device for an endoscope, the claw-like portion 2 is attached to the arm portion 2a.
Since the angle made by b is a right angle or an obtuse angle (for example, Japanese Patent Publication No. H8-17778), when an external force acts on the clip 2 being placed, the claw-like portion 2b comes out of the mucous membrane, and the clip 2 is relatively easily affected. Had dropped out of 100.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an endoscope clip device having a good indwelling property so that a clip during the indwelling is not easily dropped from an affected part by an action of an external force or the like.

[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 that is detachable from the sheath near the distal end of the sheath. An operation transmitting member for engaging the clip closing ring, which is not engaged with the vicinity of the base end portion of the clip, near the base end portion of the clip by remote operation from the base end side of the sheath is inserted into the sheath. In the arranged endoscope clip device, a claw-like portion that projects inward at an acute angle with respect to the arm portion is formed so as to protrude from each end of the pair of arm portions of the clip.

The angle formed by the claw portion with respect to the arm portion is 3
When the angle is in the range of 0 ° to 60 °, the mucous membrane is easily stabbed and hard to come out, and is very preferable.

[0009]

Embodiments of the present invention will be described with reference to the drawings. FIG. 2 shows the entire configuration of the clip device for an endoscope, 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 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 the respective distal ends thereof. The claw 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 an end thereof, 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, the clip is in a natural state (ie, a state in which the pair of arms 2a are parallel) when no external force is applied. 2 has been drawn almost completely 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 formed by bending inward from each end of a pair of arms 2a and projecting therefrom. 2a is an acute angle (that is, less than 90 °).

The base ends of the pair of arms 2a are approximately 360 °
The arm 2a is opened and closed by deforming the base connecting portion 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 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 via a connecting member 5.

As shown in FIG. 1, the clip connecting hook 4 has a distal end portion having a large outer diameter passed through a connecting hole 2d formed at the base end of the base end connecting portion 2c of the clip 2. It is connected to the clip 2 by being in the stop state.

Then, as shown in FIG.
By elastically deforming the slit formed in the axial direction of the clip connecting hook 4 so as to narrow it, the clip connecting hook 4 can be pulled out from the connecting hole 2d and the connected state to the clip 2 can be released.

A clip closing ring 6 for deforming the proximal connecting portion 2c of the clip 2 is arranged in the distal end of the sheath 1. The clip closing ring 6 is formed in a short cylindrical shape in which the inner diameter at the proximal end is smaller than the distal end.
The base end connecting portion 2c of the clip 2 is
It is deformed by being pulled inside.

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 thus configured, 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, the base end connecting portion 2c of the clip 2 is drawn into the clip closing ring 6 and deformed, so that the pair of arms 2a is opened. Changes to

In this state, when the affected part is positioned between the pair of arms 2a and the clip closing ring 6 is pushed out from the operation part 20, the base connecting part 2c is further deformed as shown in FIG. The tip of the clip closing ring 6 pushes the pair of arms 2a of the clip 2 from the back side, whereby the pair of arms 2a is closed in parallel, and the claw-like portion 2b
Pierces the mucous membrane of the affected part 100.

Further, the base connecting portion 2c of the clip 2 is deformed into a state of being squashed by being fitted into the small inner diameter portion on the base side of the clip closing ring 6, whereby the clip connecting hook 4 is crushed and connected. The hole 2d can be released.

Then, the clip connecting hook 4 is detached from the clip 2 and the entire portion on the sheath 1 side is pulled out to the hand side. As shown in FIG. Detained in a state of biting the mucous membrane.

In this indwelling state, the claw 2b of the clip 2 piercing the mucous membrane of the affected part 100 is
Is an acute angle, the clip 2 is
Even when an external force acts in a direction deviating from 00, the clip 2 does not easily fall off the mucous membrane because the claw-shaped portion 2b is hooked to the mucous membrane.

The angle θ formed between the claw 2b and the arm 2a
Is close to 90 °, the claw-shaped portion 2b is easily removed from the mucous membrane, and if it is close to 0 °, it is difficult to pierce the mucous membrane.
When it is in the range of about 60 °, it is most preferable because it is easy to stick and it is difficult to come out.

[0027]

According to the present invention, a clip can be easily placed, and a claw-like portion protruding from each end of a pair of arms of the clip at an acute angle inward with respect to the arm is formed. By doing so, the clip during placement does not easily fall off the affected part due to 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 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 cross-sectional view showing an open state of the clipping device for an endoscope according to the embodiment of the present invention in opening and closing operations of the clip.

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 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.

FIG. 6 is a side sectional view showing a state where a clip of a conventional endoscope clip device is placed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sheath 2 Clip 2a Arm part 2b Claw part 2c Base end connection part 3 Operation wire (operation operation transmission member) 4 Clip connection hook 5 Connecting member 6 Clip closing ring 7 Ring push-out 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 engages 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 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 into the sheath and arranged. A clip device for an endoscope, wherein a claw-like portion inwardly projecting at an acute angle with respect to the arm portion is formed so as to protrude from each end of the arm portion. 2. The endoscope clip device according to claim 1, wherein the angle formed by the claw-shaped portion with respect to the arm portion is in a range of 30 ° to 60 °.