JP2003339718A - Clip device for endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clip device for an endoscope capable of being simplified in ordinary maintenance by preventing a connection member released from the connection state with a clip from entering a sheath to a constant degree or more. <P>SOLUTION: A connection member penetration control means 40, which controls that the connection member 5 rearwardly extending from the clip 1 to be arranged to be connected to the traction member 3 deeply enters the distal end part of a sheath 7 over a constant range or more, is provided. As the connection member 5, a string member or the like, which is drawn by the traction member 3 and cut after the clip 1 is held to a state closed by a clip closing member 6, is used. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope which is used by passing through a treatment instrument insertion channel of an endoscope and is left in the body with a clip closed in order to perform hemostasis, ligation, marking or the like in the body. The present invention relates to a clip device for a mirror.

[0002]

2. Description of the Related Art In general, a clip device for an endoscope includes a clip that can be opened and closed and a clip closing member that holds the clip in a closed state, which is inserted into and removed from a treatment instrument insertion channel of an endoscope. Is arranged at the distal end of the sheath.

Then, by pulling the operation wire inserted through the sheath so as to be able to advance and retreat in the axial direction from the proximal side, the cord-like body extended backward from the clip and connected to the operation wire, etc. The connecting member is pulled into the distal end portion of the sheath, whereby the clip is opened and then closed, and the closed state is held by the clip closing member.

In this state, the string-shaped body is cut by the pulling force of the operation wire, and the connected state between the clip and the connecting member is released, and the clip closed by the clip closing member is separated from the sheath. Be placed in the body.

[0005]

In the conventional clip device for an endoscope as described above, after the clip is left in place, the connection member released from the connection state with the clip is inserted deep into the sheath. Sometimes, it was necessary to check and maintain the condition on a daily basis, and management was troublesome.

Therefore, the present invention provides a clip device for an endoscope which can simplify daily maintenance by preventing a connecting member, which has been disconnected from a clip, from entering a sheath more than a certain amount. The purpose is to provide.

[0007]

In order to achieve the above object, the clip device for an endoscope of the present invention comprises a clip that can be opened and closed and a clip closing member that holds the clip in a closed state. Is placed at the tip of the sheath,
By pulling the pulling member that is inserted through the sheath so as to be movable back and forth in the axial direction from the proximal side, the connecting member that is extended rearward from the clip and is connected to the pulling member is pulled into the distal end portion of the sheath. In the endoscope clip device, the clip is opened and closed after the clip is opened, and the closed state is held by the clip closing member to release the connected state between the clip and the connecting member. The connecting member invasion restricting means for restricting the intrusion of a part beyond a certain range in the tip end portion is provided.

Alternatively, the connecting member may be a string-like member, which is pulled by a pulling member to hold the clip closed by the clip closing member and then cut.

Further, the connecting member intrusion restricting means may be provided at the tip end portion of the pulling member connected to the connecting member or in the vicinity thereof, and the connecting member intrusion restricting means is
It may be formed of a sheath.

[0010]

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, in which a clip 1 is arranged at a tip portion of a flexible outer tube 2 made of, for example, a tetrafluoroethylene resin tube or a superelastic alloy tube. .

In FIG. 2, the clip 1 has a portion near the base end housed in the distal end of the outer tube 2, and is formed so as to inwardly project to the arm portion 1a and the respective distal ends thereof which are open to some extent. The front claw 1d is visible.

The outer tube 2 which is inserted into and removed from a treatment tool insertion channel of an endoscope (not shown) is loosely fitted to a flexible sheath 7 which is a coil pipe in which a stainless steel wire is closely wound with a constant diameter. It can be moved back and forth in the axial direction.

The operating portion 20 connected to the proximal end of the flexible sheath 7 has a body hook 2 with a finger hook 22 attached to the end portion.
A slider 23, to which the proximal end of the operation wire 3 (pulling member) is connected, is slidably attached to 1, so that the operation wire 3 can be pulled in the axial direction.

Further, the base end tubular body 24 of the outer tube 2 is slidably arranged independently of the body shaft 21.
Liquid can be fed into the outer tube 2 from a water feed inlet 25 projecting from the proximal tubular body 24.

In FIG. 1, the clip 1 is closed and the outer tube 2 is inserted.
4 shows a distal end portion of the clip device for an endoscope in a state of being pulled in. The clip 1 is formed by, for example, bending a stainless steel plate for springs or the like so as to be connected to each other.
In b, the three arm portions 1a connected to each other are arranged at equal intervals (that is, approximately 120 ° intervals) so that they can be opened and closed in a radial manner without crossing each other.

At a position near the base end of each arm portion 1a, an opening / closing drive portion 1c is formed in which a bulging portion 1c2 bulging outward in an arc shape is formed immediately after the constricted portion 1c1 constricted inward. Is formed, and the arm portion 1 is formed by deforming the opening / closing drive portion 1c.
a opens and closes.

An operation wire 3 (pulling member) which is operated to move back and forth in the axial direction by the slider 23 arranged on the operation portion 20 is arranged at the axial position of the outer tube 2 and has a clip at its tip. A clip connecting hook 4 that can be engaged with and disengaged from a clip connecting wire 5 extending rearward from 1 is fixed.

In the clip connecting hook 4, the tip of the operation wire 3 is connected and fixed to the rear half by soldering or the like, and a string-like clip connecting wire is formed in a recess 4a formed by recessing in the side surface of the front half. 5 (connecting member) can be disengaged.

The clip connecting wire 5 of this embodiment is formed into an annular shape by bundling both ends of a single flexible cord-like wire, inserting the bundled wire into the binding pipe 5a, and fixing them integrally there.

In the rear half of the clip connecting hook 4, the maximum clearance between the rear half of the clip connecting hook 4 and the inner surface of the flexible sheath 7 is smaller than the wire diameter of the clip connecting wire 5, and the maximum gap is smaller than that in the flexible sheath 7. The connecting member intrusion restricting means 40 restricts the clip connecting wire 5 from entering the inner part.

Reference numeral 6 denotes a clip closing ring (clip closing member) for pressing and deforming the bulging portion 1c2 of the clip 1 from the outer surface side, which is a ring receiver fixed to the distal end portion of the flexible sheath 7. It is arranged to be detachable from the front of the tube 8.

Further, from the opening / closing drive portion 1c of the clip 1 to the base end portion 1b, a clip core metal 9 is provided inside the arm portion 1a.
Are interpolated. The clip core metal 9 has a constricted portion 1c.
The portion located inside 1 is formed in a thin cylindrical shape (narrow diameter portion 9a), and the rear portion thereof is formed in a thick cylindrical shape that cannot pass through the constricted portion 1c1, and the arm portion 1a of the clip 1 It is designed so that it cannot get out of the inside.

As shown in FIG. 3, the clip 1 portion of the thus configured endoscope clip device constitutes one unit together with the clip connecting wire 5, the clip closing ring 6 and the clip core metal 9. ing.

The clip connecting wire 5 is loosely passed between the base end portion 1b of the clip 1 and the rear end surface of the clip core metal 9 and extends rearward, and the clip closing ring 6 is connected to the base end portion of the clip 1. It is fitted on the outer surface of 1b and locked there by frictional force.

In use, when the mantle tube 2 is retracted rearward from the setting state shown in FIG. 1 and then the operating wire 3 is pulled toward the operating portion 20, the clip 1 swells as shown in FIG. When the portion 1c2 is drawn into the clip closing ring 6 and is deformed, the arm portion 1a is largely opened.

Next, when the operating wire 3 is pulled more strongly toward the operating portion 20, a part of the expanded portion of the arm portion 1a of the clip 1 is pulled into the clip closing ring 6 as shown in FIG. It becomes a state and is narrowed, and each arm 1a
The tip claw 1d at the tip of the pierces the mucous membrane in a state of wrapping the affected area.

In the clip connecting hook 4 of this embodiment,
An acute angle portion 4b for cutting the clip connecting wire 5 by being strongly pressed against the clip connecting wire 5 is formed, and at the end of a series of operations for pulling the operation wire 3 toward the operation section 20, the clip connecting wire 5 is removed. The clip connecting hook 4 is strongly pressed against the acute angle portion 4b to be cut.

The clip connecting wire 5 cut in this way is disengaged from the clip 1 by being pulled by the clip connecting hook 4 as shown in FIG. 6, and the flexible sheath 7 as shown in FIG. Is pulled into the tip of the.

However, the rear half of the clip connecting hook 4 is placed between the clip connecting wire 5 and the inner surface of the flexible sheath 7.
Connecting member intrusion restricting means 4 that does not form a gap for passing through
Since it is 0, the clip connecting wire 5 does not enter the depth of the flexible sheath 7 beyond the clip connecting hook 4.

Therefore, the operation wire 3 is made to project the clip connecting hook 4 from the tip of the flexible sheath 7.
The clip connecting wire 5 can be reliably removed from the clip connecting hook 4 by pushing in the operation portion 20 side.

The present invention is not limited to the above-mentioned embodiment, and as shown in FIG. 8, for example, a gap is formed between the inner surface of the flexible sheath 7 and the clip connecting wire 5 to be inserted therein. The connecting member intrusion restricting means 40 may be formed as an independent member and fixed to the operation wire 3 near the rear side of the clip connecting hook 4, as shown in FIG. The operation wire 3 may be connected using the means 40.

Further, as shown in FIG. 10, the operating wire 3 may be formed to have a large diameter from the proximal end side to the vicinity of the distal end, and it may be used as the connecting member intrusion restricting means 40. Reference numeral 41 is a brazing portion connecting the wires.

Further, as shown in FIG. 11, the flexible sheath 7 has a rear inner diameter smaller than the vicinity of the distal end thereof so that there is no gap between the inner surface of the clip connecting hook 4 and the clip connecting wire 5 therethrough. The member intrusion restricting means 40 may be used.

In each of the above embodiments, the clip 1
Although the string-shaped clip connecting wire 5 is used as the connecting member extending rearward from the connecting member, the connecting member of the present invention is not limited to the string-shaped body and may have various forms.

[0035]

According to the present invention, the connecting member is provided to extend rearward from the clip and connected to the pulling member so as to prevent the connecting member from going deeper than a certain range in the distal end portion of the sheath. By providing the restricting means, the connecting member whose connection with the clip has been released does not enter the sheath for a certain amount or more, so there is no need to check the insertion of the connecting member into the sheath one by one, and daily maintenance is possible. It can be greatly simplified.

[Brief description of 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 overall configuration of the endoscope clip device according to the first embodiment of the present invention.

FIG. 3 is a plan partial sectional view of a unit of a clip portion of the endoscope clip device according to the first embodiment of the present invention.

FIG. 4 is a side sectional view showing an open state in the opening / closing operation of the clip of the endoscope clip device of the first embodiment of the present invention.

FIG. 5 is a side cross-sectional view showing a closed state in the opening / closing operation 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 an operation after clipping of the endoscope clip device according to the first embodiment of the present invention.

FIG. 7 is a side cross-sectional view showing a state inside the sheath after clipping of the endoscope clip device according to the first embodiment of the present invention.

FIG. 8 is a side sectional view showing a state inside the sheath after clipping of the endoscope clip device according to the second embodiment of the present invention.

FIG. 9 is a side sectional view showing the state inside the sheath after clipping of the endoscope clip device of the third embodiment of the present invention.

FIG. 10 is a side cross-sectional view showing a state inside the sheath after clipping of the endoscope clip device according to the fourth embodiment of the present invention.

FIG. 11 is a side sectional view showing a state inside the sheath after clipping of the endoscope clip device of the fifth embodiment of the present invention.

[Explanation of symbols]

1 clip 1a arm 2 mantle tube 3 operation wire (traction member) 4 clip connection hook 5 Clip connecting wire (connecting member) 5a Bundling pipe 6 Clip closing ring (clip closing member) 7 Flexible sheath 20 Operation part 40 Connection member intrusion control means

Claims (4)

[Claims] 1. A clip provided to be openable and closable and a clip closing member for holding the clip in a closed state are arranged at a distal end portion of a sheath, and are inserted in the sheath so as to be capable of advancing and retracting in an axial direction. By pulling the pulling member from the proximal side, the connecting member extended rearward from the clip and connected to the pulling member is drawn into the distal end portion of the sheath to close the clip after opening. In the endoscope clip device configured to hold the closed state by the clip closing member and release the connected state between the clip and the connecting member, the connecting member has a distal end portion of the sheath. A clip device for an endoscope, which is provided with a connecting member invasion restricting means for restricting an intrusion from a certain range inside. 2. The connecting member is a cord-like body, and is pulled by the pulling member so as to be cut after the clip is held in the closed state by the clip closing member. Item 2. The clip device for an endoscope according to Item 1. 3. The clip device for an endoscope according to claim 1, wherein the connecting member intrusion restricting means is provided at a tip end portion of the pulling member connected to the connecting member or a portion in the vicinity thereof. . 4. The clip device for an endoscope according to claim 1, wherein the connecting member intrusion restricting means is formed by the sheath.