JPH0852147A - O-ring fitting device - Google Patents

Abstract

PURPOSE:To provide a device capable of conveniently, safely and securely fitting an O-ring during an operation in a A' kit for covering and banding the O-ring mounted on the tip periphery of this O-ring fitting device on a varix of stomach or gullet with an endoscope. CONSTITUTION:This O-ring fitting device is based on construction comprising a substrate with one or plural holes 2, protrusions 3 or libs on the back side face, and a tube body with an outer diameter capable of smoothly inserting into those holes. And, an expansion tool 6 with a recession 7 with an equal inner diameter to the outer diameter of the tube body at the top side and a form tapered at the rear side is added to make the construction.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a stomach derived from liver disease,
For the purpose of treating esophageal varices, a simple and reliable O-ring is applied to the ligation tool of the ligation kit used for ligation to ligate the varicose veins and mechanically block the blood flow to reduce, eliminate, or thrombosis the varicose veins. The present invention relates to an O-ring mounting tool for setting.

[0002]

2. Description of the Related Art A method for treating gastric and esophageal varices associated with liver cirrhosis has hitherto been performed by locally injecting a sclerosing agent having endothelial cytotoxicity such as endoscopic sclerotherapy into the varicose vein or outside the varicose vein. Block blood circulation by stagnating and forming thrombus,
The mainstream technique was devastating varicose veins.

However, the intravenous administration of a drug having side effects to the living body causes various complications such as pulmonary embolism, pulmonary insufficiency, and renal disorder together with complicated hemodynamics of portal hypertension. Is causing. Therefore, the amount of the curing agent used at one time is also limited, and the treatment takes into consideration the recovery of thought, and the treatment period becomes long.

Therefore, in recent years, ligation of the esophageal varices has come to be used as a treatment method for stomach and esophageal varices. As shown in FIG. 4, the esophageal varices ligation is performed by sucking the varicose veins (27) into a tubular device (22) attached to the tip of an endoscope (5) and preliminarily applying the varicose veins to the outside of the device. The cylinder (21) is pulled off with the wire (24) inserted from the forceps hole, and the O-ring (23) set by unfolding is pulled off, and it is hung on the root part of the varicose vein that has been suctioned to form a polyp.
It is a procedure to mechanically ligate a varicose vein by the force of the rubber of the ring to destroy it.

By the ligation of the esophageal varices, the amount of the curing agent used can be reduced by not using the curing agent or by using it in combination with sclerotherapy, so that complications are reduced and the burden on the patient is reduced. In addition, the number of treatments and the number of days are reduced, and it is expected that the application of this treatment method will increase in the future.

Now, the ligation kit currently used will be described. FIG. 3 shows the structure of the present ligation kit. The tubular device (22) attached to the tip of the endoscope (20) is a cylinder (with an O-ring (23) attached to the tip ( 21) is inside. A wire (24) which has been passed through a forceps hole (25) of an endoscope is connected to the cylinder (21) in advance.
By pulling 4), the cylinder (21) retracts, and as a result, the O-ring (23) falls off from the cylinder (21).

However, in the present 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 is moved to the position shown in FIG. As shown in b), the O-ring is attached to the hook (26) on the inside of the cylinder (21) and fixed, and the cylinder (21) is attached to the device (22). The wire (24) Since the wire is thin and the hook of the cylinder (21) is small, it is difficult to fit the tip of the wire, or the wire (24) or device (22) becomes slippery due to leakage of body fluid during treatment, making it difficult to wear. There is a long treatment time,
There is a problem that the ring cannot be used when it is dropped.

As a tool for expanding the O-ring (23) and mounting it 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. No. In this, the auxiliary tool (28) is put on the tip end side of the cylinder (21), expanded while pushing the O-ring (23) from the tip end side, and transferred to the tip end part of the cylinder (21) to be attached. However, since a small part called a cylinder (21) needs to be mounted while applying a large force, the workability is poor, and the cylinder and the O-ring are often dropped.

[0009]

DISCLOSURE OF THE INVENTION The present invention has been made as a result of various studies in order to solve the problem that it is difficult to attach an O-ring in a conventional ligation kit and it takes a long time. Is a ligation kit O-ring mounting tool which solves the above-mentioned drawbacks of the conventional O-ring mounting method and allows the O-ring to be simply and safely mounted during the treatment and shortens the treatment time. To provide.

[0010]

That is, the present invention provides an inner cylinder of a ligation kit for endoscopically attaching and ligating an O-ring mounted on the outer periphery of a distal end portion to a stomach or esophageal varices. A tool for mounting an O-ring on the outer periphery of the tip end of a substrate, which has one or a plurality of holes and a projection or rib on the lower surface, and which can be smoothly inserted into and removed from the holes. It is based on an O-ring mounting tool, which is characterized in that it is composed of a tubular body having an outer diameter.

An O-ring mounting tool in which a cylindrical body is inserted into one or a plurality of holes provided in the substrate and an O-ring is mounted near the top of the cylindrical body protruding from the upper surface of the substrate,
Furthermore, the substrate and the tubular body are provided with a concave portion having an inner diameter substantially equal to the outer diameter of the tubular body on the tip side,
An O-ring mounting tool having a configuration in which a rear end side has a tapered expansion tool is also included in the scope of the present invention.

The present invention will be described in detail below with reference to the drawings. FIG. 1 is a diagram showing a configuration of an O-ring mounting tool according to an embodiment of the present invention.

The substrate (1) is provided with one or a plurality of holes (2), and a plurality of holes (2) are provided on the lower surface thereof, for example, projections (3) are provided at four corners of the substrate (1), or the substrate (1) is provided. ) Is provided with a skirt-like rib in the peripheral portion so that a space is provided 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 inserting an O-ring on the top of the cylindrical body (4) inserted into the hole (2) of the substrate (1) and protruding from the upper surface. As shown in c), a concave portion (7) having an inner diameter substantially equal to the outer diameter of the tubular body (4) is provided on the front end side (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, the O-ring is fitted to the tip of the expansion tool (6) on the rear end side, and the O-ring is expanded while moving toward the tip side along the tapered portion. Here, FIG. 2 (a)
As shown in FIG. 2, a concave portion (7) on the tip side of the expansion tool (6) is provided at the top of the tubular body (4) inserted into the hole (2) of the substrate (1).
Then, the expansion tool (6) is removed while pressing the O-ring (8) against the substrate (1) side. Incidentally, it is preferable to apply a small amount of silicone oil or the like to the O-ring so that the O-ring can be slipped easily and can be easily mounted.

As a result, as shown in FIG. 2B, the O-ring (8) is attached to the outer circumference of the top of the tubular body (4). At this time, in order to keep the length of protrusion of the tubular body (4) on the upper surface of the substrate (1) constant, as shown in FIG.
It is preferable to provide a rib (5) larger than the outer diameter of the hole (2) of the substrate (1) at the lower end of the. When the O-ring is attached, the rib (5) is pressed from the lower surface side of the substrate (1) so that the tubular body (4) is stable and the attachment operation can be performed smoothly. Further, by providing the rib (5), the cylindrical body (4) having the O-ring attached thereto is fixed and does not fall off, which is convenient for carrying.

In this way, the O-ring is expanded and attached (set) to each tubular body (4), and then the O-ring is used to set the O-ring as shown in FIG.
An O-ring is attached to the distal end of the inner cylinder of a ligation kit for endoscopically attaching and ligating an O-ring to the stomach and esophageal varices.
Put on the ring. That is, when the distal end portion of the inner cylinder (11) of the ligation kit is inserted and fitted into the inner cavity of the cylindrical body (4) of the O-ring mounting device of the present invention in which the O-ring is set, the slide is performed. The tubular body (4) is pushed by the tip of the barrel (12) or the outer barrel (13) to retract, and the O-ring (8)
Moves to the outer circumference of the tip of the inner cylinder (11), and the O-ring (8)
The attachment 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, respectively, and used as needed. It may be assembled, or it is possible to insert the tubular body (4) into the substrate (1) in advance and supply it with the O-ring (8) set.

The ligation kit shown in FIG. 3 is used by being attached to the distal end portion of the endoscope (16) by the attachment tube (17), and it is a slide tube (around the inner tube (11)). 1
2) and the outer cylinder (13) are retracted rearward, but at the time of ligation, the fluid is pressed from the tube (15) to move toward the distal end side, and the O-ring (8) is pushed down. There is. The O-ring mounting tool of the present invention is particularly effective for a ligation kit having such a structure, but is not limited to this.

The inner diameter of the hole (2) of the base plate (1) allows the tubular body (4) to slide smoothly, and the O-ring must be sized so that the O-ring does not fit into the gap. The transition may not be smooth. The clearance between the tubular body (4) and the hole (2) of the substrate is 0.1
1.0 mm is preferable.

The inner diameter of the tubular body (4) is such that the O-ring mounting portion of the ligation kit can be inserted smoothly, and the wall thickness of the tubular body is when the O-ring (8) is mounted. However, it is necessary to have enough strength to prevent deformation, and select a wall thickness that has an appropriate strength in combination with the material. However, the thicker the wall, the larger the outer diameter.
The O-ring may stretch too much and may not shrink completely, so it is better to reduce the outer diameter as much as possible by reducing the wall thickness.
Suitable for O-rings because it does not burden you.

The materials of the substrate (1), the tubular body (4), and the expansion tool (6) which compose the O-ring mounting tool of the present invention include the tubular body (4) and the O-ring (8). It is preferable to use a material that slides smoothly and has good slipperiness. Also,
The size of the contact portion between the cylindrical body (4) and the hole (2) of the substrate (1) is required to have an appropriate clearance, so that it is easy to process and the dimensional accuracy is good, and further, at the time of heat sterilization. Metals such as stainless steel and hard plastics are preferable as the material that does not undergo thermal deformation due to temperature or the like, but are not limited thereto.

Now, an example of using the endoscopic ligation kit and the O-ring mounting device according to the present invention will be described. First, xylocaine jelly or the like is applied to the outer surface of the fiber portion of the endoscope and set in the inner cavity of the guide tube for passage through the pharynx. Next, insert only the tip of the endoscope into the pharynx, then slide the guide tube along the endoscope to insert it into the pharynx, and insert the mouthpiece attached to the rear end of the guide tube to the patient. Hold it in the mouth and fix it.

At this point, the endoscope is taken out, and an endoscopic ligation kit as shown in FIG. 3 is set at the tip of the endoscope (16). Next, the tip of the ligation kit is attached to the tubular body (4) of the O-ring mounting tool of the present invention in which the O-ring is set in advance.
O-ring on the outer circumference of the inner cylinder (11) of the ligation kit by inserting it into the inner cavity of the ligation kit and pressing it against the substrate (1) until the tubular body (4) retracts and the O-ring (8) falls off. (8) shifts.

The endoscope in which the ligation kit is set is again inserted through the guide tube to the site of the varicose vein to be ligated. The tip of the kit is applied perpendicularly to the ligation site as much as possible, and suction is performed by the suction mechanism attached to the endoscope to draw the varicose vein into the tip of the kit.
When the polyp-shaped varicose vein drawn into the field of view of the endoscope turns red, fluid is injected into the tube (15) using a syringe or the like, and the slide cylinder (12) is slid toward the distal end side to O-ring. And ligate the varicose vein. Below, 1
For each ligation, remove the endoscope and set the O-ring (8). Therefore, when the number of times of ligation is large, the required number of O-rings (8) are set in advance using the substrate (1) provided with a plurality of holes (2).

[0025]

EFFECTS OF THE INVENTION The use of the O-ring attachment device of the present invention eliminates the problem that the conventional O-ring is difficult to attach in the operation of ligating the stomach and esophageal varices. The O-ring can be attached safely and securely, and is suitable as an auxiliary tool for ligation.

[Brief description of 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 which shows the method of setting a ring.

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

FIG. 4 is a view showing a conventional ligation kit, (a) is a cross-sectional view showing a state of being attached to an endoscope, (b) is a view showing a state of being fitted with an O-ring, and (c) is a varicose vein. It is a figure which shows the state which is sucking.

[Explanation of symbols]

 1 Substrate 2 Hole 3 Protrusion 4 Cylindrical body 5 Rib 6 Expansion tool 7 Recessed portion 8,23 O-ring 11 Inner tube 12 Slide tube 13 Outer tube 16,20 Endoscope

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] December 13, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 5

[Correction method] Added

[Correction content]

FIG. 5 is a view showing a conventional auxiliary tool for mounting an O-ring.

Claims (4)

[Claims] 1. A ligation kit for endoscopically attaching and ligating an O-ring attached to the outer periphery of the distal end to the stomach and esophageal varices, the O-ring being attached to the outer periphery of the distal end of the inner cylinder. A tool for doing so, comprising: a substrate having one or a plurality of holes and a projection or a rib on the lower surface thereof; and a cylindrical body having an outer diameter capable of being smoothly inserted into and removed from the holes. An O-ring mounting tool characterized by being configured. 2. The O-ring mounting tool according to claim 1, wherein a rib larger than the inner diameter of the hole of the substrate is provided at the lower end of the tubular body. 3. A cylindrical body is inserted into one or a plurality of holes provided in a substrate, and an O-ring is attached near the top of the cylindrical body protruding from the upper surface of the substrate. The O-ring mounting tool according to claim (1) or claim (2). 4. A substrate having one or a plurality of holes and a projection or a rib on the lower surface, a cylindrical body having an outer diameter capable of being smoothly inserted into and removed from the holes, and a substrate on the tip side. Claim (1) or Claim (2), characterized in that it is provided with a recess having an inner diameter substantially equal to the outer diameter of the tubular body, and is constituted by an expansion tool having a tapered rear end side. The described O-ring mounting tool.