JPH027950A - Clip device for tissue of living body - Google Patents

Abstract

PURPOSE:To eliminate the puncture of the mucous membrane of a living body even in the combination use with an ultrasonic treatment jig by forming a press tube and a clip so as to bring both of them to an electric insulating state. CONSTITUTION:An insert tube 1 is inserted through the body cavity of a living body through the channel of an endoscope in a freely detachable manner and an operating wire 4 having a hook 7 mounted to the leading end thereof is inserted through the insert tube 1 in a freely advancing and receding state. A press tube 13 having electric insulating properties is mounted to the insert tube in a freely detachable manner. A clip 12 having electric insulating properties is mounted on the hook 7 in a freely detachable manner and closed by pulling the operating wire 4 on this side to draw the clip 12 in the press tube 13.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a biological tissue clipping device for clipping and retaining biological tissue within a biological cavity.

[Conventional technology] Conventionally, it has been possible to treat and treat diseased areas within body cavities with high-frequency treatment instruments, such as bio-observation, which uses a high-frequency snare to ablate diseased areas within body cavities, and cauterize cancer-affected areas with high-frequency treatment instruments. be.

However, it is generally difficult to ablate a smooth lesion with a high-frequency snare, and in such cases, shearing may occur.

Furthermore, when cauterizing a cancerous site, there is a desire to use a clip as a marker for the site.

[Problems to be Solved by the Invention] However, the biological tissue clipping device conventionally known in Japanese Utility Model Publication No. 53-20957 is not originally intended for the above-mentioned purpose, but on the other hand, the material itself is Since it is made of metal, even if it were to be used for the above purpose, there is a risk that a high frequency current would flow through the clip and perforate the mucous membrane of the clipped area.

The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a safe biological tissue clipping device that can prevent dangers caused by high-frequency current even when a clip is used.

[Means and effects for solving the problem] In order to solve the two-legged problem, the biological tissue clipping device of the present invention includes an insertion tube that is inserted into the biological cavity through the channel of the endoscope and into the insertion/removal port. , an operating wire that is inserted into the insertion tube so that it can move forward and backward, and has a hook attached to its tip;
An electrically insulating holding tube is detachably attached to the insertion tube, and an electrically insulating holding tube is detachably attached to the hook and is closed by pulling the L-leg operation wire toward the proximal side and into the holding tube. The device is equipped with a clip that has properties.

According to this biological tissue clipping device, since the holding tube and the clip are formed to be electrically insulating, it is safe even when used in combination with a high-frequency treatment instrument.

[Embodiment] FIGS. 1 to 8 show an embodiment of the present invention. The insertion tube 1 of the main body of the clip device shown in FIGS. 1 and 2 is formed from a flexible tube material such as tetrafluoroethylene resin. The insertion tube 1 has a thickness and flexibility that allows it to be inserted into an insertion channel of an endoscope (not shown) so as to be freely advanced and retracted. An operating tube 3, which serves as a flexible operating member and has a connecting ring 2 made of a single tube made of stainless steel attached to its tip, is inserted into the insertion tube 1 so as to be movable forward and backward. Furthermore, an operating wire 4 made of stainless steel stranded wire or the like is inserted into the interior of the operating tube 3 so as to be freely advanced and retracted.

A hook 7 is provided at the tip of the operating wire 4 and is detachably engaged with a engagement hole 6 of a connecting plate 5, which will be described later.

One half of the distal end of the hook 7 is cut off, and a locking pin 8 is provided on the cut surface in a direction perpendicular to the longitudinal direction of the operating wire 4. This locking pin 8 has a circular head 8a larger in diameter than a long hole 6a of a locking hole 6 formed in a connecting plate 5 and smaller in diameter than a large diameter hole 6b, and a stem having a smaller diameter than the long hole 6a. It consists of part 8b.

Further, an operation section (not shown) is provided at the proximal end of the insertion tube 1, and this operation section includes an operation tube 3 and an operation wire 4.
Two sliders are provided that are connected to the insertion tube and move these sliders individually forward and backward with respect to the insertion tube.

42 The connecting plate 5 has a locking hole 6 formed at the rear end to lock into the locking pin 8 of the hook 7, with the long hole 6a located at the rear and the large diameter hole 6b at the front. formed continuously. Further, a J-shaped hook portion 11 is formed at the front end of the connecting plate 5 and is removably engaged with a clip 12, which will be described later. This connecting plate 5 is formed by punching out a thin plate made of stainless steel.

On the other hand, the clip 12 is constructed as shown in FIGS. 3 and 4. That is, a thin strip-shaped plate made of stainless steel is bent in the middle, and this bent portion is connected to the proximal end 12a.
The arm portion 12 extending from the base end portions 1 and 2 a
b, the spread (interval) of the base of 12b will be described later in presser tube 1
The fitting portion 12c is formed by forming the inner diameter larger than the inner diameter of the fitting portion 12c.

Furthermore, the arm parts 12b, 12b extend beyond the fitting part 12c to intersect with each other, and the distal ends thereof are bent to face each other, and this part constitutes a holding part 12d. As shown in FIG. 4, the clamping portion 12d is elastically biased to expand in its natural state.

Further, the outer periphery of the rear part of the presser tube 13 is made smaller in diameter than the tip, and a step 13a is provided. The tip is removable and tightly fitted.

The surfaces of the clip 12 and presser tube 13 are coated with an electrically insulating material such as tetrafluoroethylene resin. Therefore, the clip 12 and the holding tube 13 have electrical insulation properties due to their insulating coating 15.15.

Then, the hook portion 11 of the connecting plate 5 is hooked and locked on the proximal end 12a of the clip 820, and in this state, the connecting plate 5 is inserted into the presser tube 13 from the side with the larger outer diameter, and the presser tube 13 is filled with a fixing agent 16 and temporarily fixed. The cassette type clip assembly 17 is removed by the three parties in this state.

Next, the operation when using the L-shaped lip device will be explained. First, the cassette type clip assembly 17 is attached to the hook 7 on the side of the main body of the clip device. This installation method is to insert the locking pin 8 into the large diameter hole 6b of the locking hole 6 of the connecting plate 5.
, and pull the clip assembly 17 forward. As a result, the stem portion 8b of the locking bottle 8 fits into the elongated hole portion 6a of the locking hole 6, and does not come off easily. In this state, pull the operating wire 4 so that the presser tube 13 connects to the connecting ring 2.
Get stuck in it. Furthermore, the operation tube 3 and the operation wire 4 are simultaneously pulled toward the proximal side, and the clip f, 11 and the vertical body 17 are housed inside the distal end of the insertion tube. At this time, the arm portion 12b of the clip 12.

12b is pressed down by the inner wall of the insertion tube 1, and is compressed and stored as shown in FIGS. 1 and 2.

Once this preparation is complete, it is introduced into the body cavity through the insertion channel of the endoscope.

Then, by observing with an endoscope, the position is determined toward the living tissue part 19 such as an affected area, and the operation tube 3 is pushed out as shown in FIG. Then, the clip 12 is released from the restraint by its insertion tube 1 and its clamping part 1
2d expands to maximum size.

Here, as shown in FIG. 5, the expanded holding portion 12d
While pressing against the surface of the tissue with the biological tissue part 19 to be held inside thereof, pull the operating wire 4 toward the proximal side, and insert the fitting part of the clip 12], 2b.
, 12b are fitted with the presser tube 13. As a result, the 61st
As shown by the threshold, the clamping part 1.2d of the clip 12 closes and clamps one living tissue part. Furthermore, by pulling the operating wire 4 toward the hand side, the hook portion 11 of the connecting plate 5 is stretched as shown in FIGS. 6 and 7, and one clip 2
comes off from the connecting plate 5. In addition, since the presser tube 13 presses the arms 12b, 12b of the clip 12 at 1j,
As shown in FIG. 6, the clip 12 remains in the body together with the clip 2 without coming off.

With this procedure, the clip 12 is clipped to the target site, for example, as shown in FIG. Excise 22.

At this time, the clip 12.12 and the presser tube 13 are electrically insulated by the insulating coating 15.15. In particular, since the clips 12.12 are electrically insulating, no high frequency current can flow through them.

Therefore, the region clipped by the clip 1212 is prevented from being perforated by the high frequency current, and the living body 311 can be safely excised. Note that this effect can be applied to various purposes, such as when the irradiated lesion site is used as a "1" mark. Furthermore, the number of clips 12 used is not limited to one or two.

Further, the present invention is not limited to the above embodiments. For example, the presser tube may be made of an electrically insulating material such as resin or ceramic.

[Effects of the Invention] As explained below, since the crimping device of the present invention is formed so that its holding tube and clip are electrically insulating, it can be used with a high-frequency treatment tool (7). It can be used safely without causing any perforation.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which FIG. 1 is a plan sectional view of the tip, FIG. 2 is a side sectional view of the tip, and FIG. 3 is a plan sectional view of the clip assembly. FIG. 4 is a side sectional view of the clip assembly, FIGS. 5 and 6.
The figure is a side sectional view of the device in use, FIG. 7 is a plan sectional view of the device in use, and the eighth figure is a perspective view of the device in use. 1... Insertion tube, 2... Connection ring, 3...
Operating tube, 4... Operating wire, 5... Connecting plate, 7...
・Hook, 8... Locking pin,... Hook part, 2... Crib, 3... Holder tube, d... Clamping part, 15... Coating, 9... Living tissue part .

Claims (1)

[Claims] An insertion tube that is removably inserted into a biological cavity through a channel of an endoscope; an operation wire that is inserted into the insertion tube so that it can be retracted and retracted, and that has a hook attached to its tip;
An electrically insulating holding tube is detachably attached to the insertion tube, and an electrically insulating holding tube is detachably attached to the hook and is closed when the operating wire is pulled toward the proximal side and into the holding tube. 1. A biological tissue clipping device comprising: