JP2000262526A - O ring mounting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device which enables handy, safe and accurate mounting of an O ring on a kit for ligation to endoscopically ligate a tissue in a body cavity with the O ring mounted on the outer circumference of the tip part thereof. SOLUTION: This device is constituted of a base plate 1 provided with at least one hole 2 and having a protrusion 3 or a rib 5 on the undersurface thereof, a cylindrical body 4 slidable into the holes having a rib on the outer circumference part of the rear end thereof and a rib with the inner diameter thereof smaller than the outer diameter of the tip part of an inner cylinder of a kit for ligation or a concentric step on the inner diameter thereof and a tool 6 for dilation which is provided with a recess part 7 with the inner diameter almost equal to the outer diameter of the cylinder body at the rear end thereof while being tapered on the rear end side thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple and reliable ligation tool for a ligation kit used for ligating tissue in a body cavity such as gastroesophageal varices ligation or internal hemorrhoid ligation.
The present invention relates to an O-ring mounting tool for setting a ring.

[0002]

2. Description of the Related Art In recent years, as a method for treating gastroesophageal varices caused by liver disease, an O-ring is used instead of endoscopic sclerotherapy, which uses a drug with side effects to block blood circulation and devastate varicose veins. Endoscopic ligation therapy, which mechanically blocks blood circulation by the force of rubber and devastates varicose veins, has been widely used due to its safety and simplicity of the procedure. In addition to the treatment of gastroesophageal varices, the use of a ligation kit includes internal hemorrhoid ligation therapy. This method is similar to gastroesophageal vein ligation and is a treatment that mechanically blocks blood flow and devastates hemorrhoids with the force of the rubber of the O-ring. It is expected that the application of this therapy will increase in the future from the viewpoint of improving the quality of life of patients because there is no need for hospitalization.

[0003] A ligation kit used for endoscopic ligation will now be described. FIG. 4 (a) shows U.S. Pat.
1 shows a structure of a ligation kit disclosed in Japanese Patent No. 735194, in which a tubular device (22) mounted on the distal end of an endoscope (20) has an O-ring (23) mounted on the distal end. A wire (24) passed through a forceps hole (25) of the endoscope is connected to the cylinder (21) in advance.
Cylinder (21) by pulling wire (24)
Recedes, so that the O-ring (23) moves the cylinder (2
It falls from 1).

However, in this ligation kit, when the O-ring (23) is set in the device (22), the tip of the wire (24) passed through the forceps hole (25) of the endoscope (20) is shown in FIG. As shown in FIG. 4 (b), the O-ring is attached to the hook (26) inside the cylinder (21) to which the O-ring is mounted in advance, and the cylinder (21) is fixed to the device (22).
Since the wire (24) is thin and the hook of the cylinder (21) is small, it is difficult to fit the tip of the wire to the hook. During treatment, the wire (24) or the device ( 22) becomes slippery,
There are drawbacks such as difficulty in wearing, and there are problems that the treatment time is long and that the O-ring (23) cannot be used by being dropped when worn.

As a tool for expanding the O-ring (23) to be mounted on the tip of the cylinder (21), a conical auxiliary tool (28) as shown in FIG. 5 is disclosed in US Pat. No. 4,735,194. Is disclosed. In this method, the auxiliary tool (28) is put on the tip side of the cylinder (21), expanded while pressing the O-ring (23) from the pointed end, and moved to the tip of the cylinder (21) for mounting. However, since it is necessary to mount a small part such as the cylinder (21) while applying a large force, the workability is poor, and the cylinder and the O-ring may be dropped.

In order to solve these problems, Japanese Patent Application Laid-Open No. 8-52147 discloses an O-ring mounting tool that can easily and safely mount an O-ring on a ligation kit. However, in this case, particularly, the outer diameter of the tip of the slide cylinder (32) as shown in FIG. 6 is larger than the outer diameter of the O-ring (8) mounted on the cylindrical body (4), and When used in a ligation kit having a structure in which the inner diameter of the peripheral rib is substantially equal to the outer diameter of the distal end of the cylindrical body (4), an O-ring () is provided between the substrate (1) and the slide cylinder (32). 8), the O-ring cannot be attached to the ligation kit because the inner tube (32) of the ligation kit cannot be pushed in until the tubular body (4) is completely detached from the substrate (1). there were.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a method disclosed in
An object of the present invention is to solve the problem of the O-ring mounting tool disclosed in Japanese Patent No. 52147, and an object thereof is to easily and safely mount an O-ring during a treatment, thereby shortening a treatment time. In particular, when the O-ring is attached to the tip of the inner cylinder of the ligation kit, the tubular body is completely retracted regardless of the shape of the slide cylinder. And surely O
An object of the present invention is to provide an O-ring mounting tool in which a ring can be mounted on a distal end of an inner cylinder of a ligation kit.

[0008]

That is, the present invention relates to a ligation kit for ligating tissue in a body cavity endoscopically with an O-ring mounted on the outer periphery of the distal end portion. A tool for mounting an O-ring,
(A) a substrate having at least one hole and having a projection or rib on the lower surface; and (b) a rib slidable in the hole and having a rib on an outer peripheral portion of a rear end, and an inner diameter of a ligation kit. A cylindrical body having a rib or a concentric step having an inner diameter smaller than the outer diameter of the distal end of the cylinder, and (c) a concave portion having an inner diameter substantially equal to the outer diameter of the cylindrical body provided at the distal end, and a rear end side tapered. An O-ring mounting tool characterized by comprising an expansion tool formed in a shape.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram showing a configuration of an O-ring mounting tool according to one embodiment of the present invention. Substrate according to the invention (1)
Is provided with at least one hole, and on its lower surface, a plurality of, for example, protrusions (3) are provided at four corners of the substrate (1), or skirt-shaped ribs are provided around the periphery of the substrate (1). The space is formed between the lower surface of the substrate (1) and the floor surface (or table surface). The cylindrical body (4) is inserted into each of the holes (2). On the other hand, the expansion tool (6) is a tool for mounting an O-ring on the top of a tubular body (4) inserted into the hole (2) of the substrate (1) and protruding from the upper surface, and is shown in FIG. )
As shown in (2), a concave portion (7) having an inner diameter substantially equal to the outer diameter of the cylindrical body (4) is provided at the front end (right side in the figure), and the rear end side is formed in a tapered shape.

Next, a method of using the O-ring mounting tool of the present invention will be described. First, add O to the rear end point of the expansion tool.
Fit the ring and expand the O-ring while moving it distally along the taper. Here, as shown in FIG. 2 (a), the top of the cylindrical body (4) inserted into the hole (2) of the substrate (1) is fitted by fitting the recess at the tip of the extension tool (6), O
Remove the extension (6) while pressing the ring (8) against the substrate (1). In addition, it is preferable to apply a small amount of silicone oil or the like to the O-ring because the O-ring can be easily slipped and easily attached.

As a result, as shown in FIG. 2B, the O-ring (8) is mounted on the outer periphery of the top of the tubular body (4). At this time, in order to keep the length of the cylindrical body (4) protruding to the upper surface of the substrate (1) constant, as shown in FIG.
It is preferable that a rib larger than the inner diameter of the hole (2) of the substrate (1) is provided at the lower end of the substrate. When the O-ring is mounted, the cylindrical body (4) is stabilized by pressing the rib (5) from the lower surface side of the substrate (1), so that the mounting operation can be performed smoothly. Also, by providing the rib (5),
Since the tubular body (4) to which the O-ring (8) is attached is fixed and does not fall off, it is convenient to carry.

After the O-ring is expanded and attached (set) to the tubular body (4) in this manner, the O-ring is used to attach the O-ring to the distal end of the inner cylinder of the ligation kit as shown in FIG. 3 or FIG. O
Attach the ring. That is, when the distal end portion of the inner tube (11, 31) of the ligation kit is inserted into the lumen of the tubular body (4) of the O-ring mounting tool of the present invention in which the O-ring (8) is set, the inner tube ( The tip of the tubular body (11, 31) abuts on an inner rib (9) or a step (10) provided on the inner peripheral portion of the tubular body (4), and the tubular body (4) is pushed back and retreated. At this time, there is always an interval of the thickness of the O-ring (8) between the tip of the slide cylinder (12, 32) or the outer cylinder (13) and the top of the cylindrical body (4). Pushing can be reliably performed until the tubular body (4) comes off. As a result, the O-ring (8) moves to the outer periphery of the distal end of the inner cylinder (11, 31),
The attachment of the ring (8) to the ligation kit is completed.

In the O-ring mounting tool according to the present invention, the substrate (1), the tubular body (4), the O-ring (8) and the expansion tool (6) are prepared as parts, and can be assembled as necessary. It is also possible to insert the tubular body (4) in the substrate (1) in advance and supply the O-ring (8) in a set state. The ligation kit shown in FIGS. 3 and 6 uses an endoscope (16, 3) with a mounting tube (17, 37).
It is used by being attached to the tip of 6).
The slide tubes (12, 32) around the (1, 31) are retracted rearward, but at the time of ligation, the tubes (15, 35)
The fluid moves toward the front end by press-fitting the fluid from below, and pushes down the O-ring (8). The O-ring mounting tool of the present invention is particularly effective for a ligation kit having such a structure, but is not limited thereto.

The inner diameter of the hole (2) of the substrate (1) is such that the cylindrical body (4) can slide smoothly and the O-ring can be smoothly inserted into the ligating kit unless the O-ring is dimensioned so as not to enter the gap. May not move to The clearance between the cylindrical body (4) and the hole (2) of the substrate (1) is 0.
1 to 1.0 mm is preferred. The inner diameter of the tubular body (4) is large enough to allow the O-ring mounting portion of the ligation kit to be inserted smoothly, and the thickness of the tubular body (4) is deformed when the O-ring (8) is mounted. It is necessary to have enough strength so that it does not have to be strong. However, when the wall thickness is increased, the outer diameter increases, and when the O-ring is mounted, the O-ring may be too elongated to completely shrink. Therefore, it is better to reduce the outer diameter as much as possible by reducing the wall thickness. It is suitable without burdening

Further, the shape of the inner rib (9) provided on the inner peripheral portion of the tubular body (4) is not particularly limited, but the tubular body (4)
In order to uniformly push in, it is preferable to adopt a structure in which projections are arranged at least at two locations on the inner periphery at equal intervals, or a structure having projections on the entire inner periphery. Alternatively, a structure in which a step (10) is simply provided without forming a protrusion may be adopted.
Also, the inner diameter of the inner rib (9) or the step (10) needs to be smaller than the outer diameter of the inner tube (11, 31) of the ligating kit in order to surely retract the tubular body (4). Further, the depth of the inner rib (9) or the step (10) from the top of the tubular body (4) is adjusted so that the O-ring can be transferred to the ligating kit without fail. ) Slide tube (12, 32) or outer tube (1)
It is preferable that the distance is obtained by adding the thickness of the O-ring (8) to one half of the thickness of the O-ring (8) to the distance of the tip of (3, 33).

The material of the substrate (1), the tubular body (4) and the extension tool (6) constituting the O-ring mounting tool of the present invention includes a tubular body (4) and further an O-ring (8). A material that slides smoothly and has good slippage is preferable. Also, the dimensions of the contact portion between the cylindrical body (4) and the hole (2) of the substrate (1) need to have an appropriate clearance, so that it is easy to process and easy to achieve dimensional accuracy. As a material that does not undergo thermal deformation due to time or temperature, for example, a metal such as stainless steel or a hard plastic is preferable. Here, examples of use of the endoscopic ligation kit and the O-ring mounting tool according to the present invention will be described based on the internal hemorrhoid ligation kit shown in FIG. First, as shown in FIG. 6A, a ligation kit is attached to the end of the endoscope (36). Next, when the distal end of the ligation kit is inserted into the lumen of the tubular body (4) of the O-ring mounting tool of the present invention in which an O-ring is set in advance, the distal end of the ligation kit is inserted into the tubular body (4). When it hits the rib (9) and pushes it further, the tubular body (4) falls off and the O-ring moves to the tip of the ligation kit.

Subsequently, an endoscope equipped with a ligation kit is inserted into the anus, and the internal hemorrhoids in the anus are observed and diagnosed. After the ligation site is determined, the operation lever is moved forward to form a suction space. The internal hemorrhoid (40) is sucked into the distal end portion of the ligation kit by a suction mechanism attached to the endoscope. Thereafter, using a syringe (39) or the like, a fluid is injected into the ligation device via the tube (35), and the slide cylinder (32) is slid to the distal end to drop the O-ring (8) to remove internal hemorrhoids. Ligation. Thereafter, the endoscope is removed for each ligation, and the O-ring (8) is set. Therefore, when the number of ligations is large, a necessary number of O-rings (8) are set in advance using the substrate (1) provided with a plurality of holes (2).

[0018]

As is apparent from the above, according to the present invention, a ligation kit used for ligating tissue in a body cavity such as gastroesophageal varices ligation or internal hemorrhoid ligation is provided in a simple and safe manner. The present invention is suitable as an auxiliary tool for ligating, since an O-ring can be attached to the device and the operator can easily use it during the operation.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an O-ring mounting tool according to an embodiment of the present invention.

FIG. 2 shows an O-ring mounting tool according to an embodiment of the present invention.
It is a figure showing the method of setting a ring.

FIG. 3 is a view showing an example of an endoscope ligation kit using the O-ring mounting tool of the present invention.

FIGS. 4A and 4B are views showing a ligation kit disclosed in US Pat. No. 4,735,194, wherein FIG. 4A is a cross-sectional view showing a state where the kit is attached to an endoscope, FIG.
(C) is a figure which shows the state which is sucking the varicose vein.

FIG. 5 is a view showing an O-ring mounting aid disclosed in US Pat. No. 4,735,194.

FIG. 6 is a view showing another embodiment of a ligation kit for an endoscope using the O-ring mounting tool of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Substrate 2 Hole 3 Projection 4 Cylindrical body 5 Rib 6 Expansion tool 7 Recessed part 8, 23 O-ring 9 Inner rib 10 Step 11, 31, Inner cylinder 12, 32 Slide cylinder 13, 33 Outer cylinder 16, 20, 36 Endoscope

Claims (1)

[Claims] 1. A ligation kit for endoscopically ligating a tissue in a body cavity with an O-ring mounted on the outer periphery of a distal end portion. (A) a substrate having at least one hole and having protrusions or ribs on the lower surface; and (b) a rib slidable in the hole and having a rib on the outer peripheral portion of the rear end, and a ligature on the inner diameter. A cylindrical member having a rib or a concentric step having an inner diameter smaller than the outer diameter of the inner cylinder front end portion; and (c) a concave portion having an inner diameter substantially equal to the outer diameter of the cylindrical body at the front end and a rear end. An O-ring mounting tool, comprising an expansion tool having a tapered side.