JPH0513410U - High frequency incision resection tool - Google Patents

Abstract

(57) [Abstract] [Purpose] The main feature of the present invention is to make it easy to bind the loop of the incision wire applied to the lesion and to improve the operability. [Structure] A plurality of slip prevention tips 9a,
9b and 9c are fixed, a large-sized non-slip tip 9a having a large protrusion amount of the incision wire 8 into the loop is arranged on the distal end side of the treatment section 10, and the incision wire 8 is attached to the rear end side of the treatment section 10. It is characterized in that the small-sized anti-slip tips 9b, 9c having a small amount of protrusion into the loop are sequentially arranged.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a high-frequency incision resecting tool such as a high-frequency snare that is endoscopically inserted into a body cavity and incises and excises a lesion in the body cavity with a high-frequency current.

[0002]

[Prior Art]

 Conventionally, high frequency snares have been used for polypectomy, but in recent years, strip biopsy, which is a new technique using high frequency snares, is becoming popular. The outline of strip biopsy is described below.

The area to which the strip biopsy is applied often has a flat lesion site. Therefore, by locally injecting physiological saline into the submucosal tissue layer just below the flat lesion site with an endoscopic needle, the flat lesion site is raised, and a loop of a high-frequency snare is added to this. The entire lesion area is cut out together with the surrounding normal tissue by high-frequency current at once.

In this strip biopsy, the lesion can be neatly resected including the normal tissue around it, so when the excision piece is examined and the lesion is completely localized within the excision piece, the lesion It is confirmed that the part was completely removed. Such a strip biopsy has been rapidly prevailing in recent years as an endoscopic complete treatment of early cancer, and has high expectations.

However, in performing this strip biopsy, in a normal high-frequency snare, when the snare loop is applied to the lesion area raised by local injection of physiological saline, the loop slips and the bondage occurs. There is a problem that it is difficult to do. In other words, even when a flat lesion is raised with physiological saline, the rise is gentler than the polyp that was previously targeted by the high-frequency snare, and the loop slips during binding.

Therefore, in Japanese Patent Application No. 2-38478, by fixing a plurality of anti-slip tips to an incision wire of a high-frequency incision resecting tool, a loop of a snare is hooked on a lesioned part and slipping of the loop is performed. It is proposed that the structure is configured to prevent the above.

[0007]

[Problems to be solved by the device]

 However, since the non-slip tips of the treatment tool disclosed in Japanese Patent Application No. 2-38478 are all formed to have the same size, when the high frequency incision resection is performed using this treatment tool. When binding the lesion, there was a problem that the anti-slip tip on the rear end side of the snare loop deeply bites into the lesion. Therefore, there is a risk that the snare loop applied to the diseased part may not be able to be bound, and high-frequency incision will be difficult to perform.

The present invention has been made in view of the above circumstances, and provides a high-frequency incision excision tool which is capable of facilitating tight binding of a loop of an incision wire applied to a lesion in a strip biopsy and which has good operability. The purpose is that.

[0009]

[Means for Solving the Problems]

 According to the present invention, an incision wire is formed in a loop shape at the tip of an operating member that is inserted into a flexible tube so as to be able to move forward and backward, and a treatment section to which high-frequency current is applied is provided. In a high-frequency incision resecting tool that is operated to project from the tip, fix a plurality of anti-slip tips to the incision wire, and use the large-sized anti-slip tip with a large protrusion amount into the loop of the incision wire. It is arranged on the front end side of the treatment portion, and the small anti-slip tip with a small amount of protrusion of the incision wire into the loop is arranged on the rear end side of the treatment portion.

[0010]

[Action]

 In the above configuration, when the operation of binding the loop of the incision wire that was hung on the lesion site, the small amount of the tip for protruding into the loop on the rear end side of the treatment part was used as a small slip prevention tip At this time, by reducing the amount of the anti-slip tip on the rear end side of the treatment portion that bites into the lesion, it is possible to securely bind the lesion with the incision wire even if the lesion has a small amount of protrusion. It is the one.

[0011]

【Example】

 Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 2 shows a high-frequency snare as a high-frequency incision cutting tool of the present invention, and 1 is a flexible tube. An operation portion 2 is provided at the base end of the flexible tube 1.

The operation portion 2 is composed of a base portion 3 and a slider 4 slidably attached to the base portion 3. To the electrode 5 of the slider 4, a proximal end of an operation wire (operation member) 6 inserted in the flexible tube 1 so as to be able to move forward and backward is connected. A high frequency power source (not shown) is connected to the electrode 5.

A connection tip 7 is attached to the tip of the operation wire 6. Both ends of a cutting wire 8 are connected to the tip 7. The incision wire 8 has a habit of opening in a loop shape in advance. When the incision wire 8 is pulled into the flexible tube 1, it is elastically deformed and crushed into an elongated shape, and when it is projected from the tip of the flexible tube 1. It is designed to spread like a loop.

As shown in FIG. 1, a plurality of anti-slip tips 9a, 9b, 9c, ... Are attached to the front half of the incision wire 8 at intervals, thereby forming a treatment section 10. There is.

As shown in FIG. 3, each of the tips 9a, 9b, 9c has a small tip 9c having the smallest amount of protrusion of the cutting wire 8 into the loop on the side of the flexible tube 1 and directed toward the tip side. Therefore, large chips 9b and 9a are sequentially arranged in a state in which the amount of protrusion of the cutting wire 8 into the loop gradually increases. In this case, the tips 9a, 9b, 9c are fixed to the wires 8 by caulking the base end portions of the tips 9a, 9b, 9c with the incision wire 8 passed through.

Next, the operation of the above configuration will be described. When excising a lesion (not shown) using the high-frequency snare configured as described above, first, the flexible tube 1 is inserted endoscopically into the body cavity.

Subsequently, when the inside of the body cavity is observed with an endoscope and a lesion is found, the slider 4 of the operating portion 2 is operated to move forward, and the incision wire 8 is projected from the distal end of the flexible tube 1. Spread in a loop.

In this state, the incision wire 8 is applied to the lesion area that has been raised in advance with physiological saline, and the slider 4 is further retracted to pull the wire 8 into the flexible tube 1 to thereby remove the lesion area from the wire. Tighten with 8.

At this time, during the work of binding the loop of the incision wire 8 hung on the lesioned part, the non-slip tips 9c, which have a small protrusion amount into the loop on the rear end side of the treatment section 10, are sequentially slip-stopped. When functioning, it is possible to reduce the amount of bite of the anti-slip tip 9c on the rear end side of the treatment portion 10 into the lesion portion. Therefore, even at a diseased part with a small amount of protrusion, the lesioned part can be securely bound by the incision wire 8. Then, by applying a high-frequency current to the incision wire 8 in this state, the lesion part sandwiched by the wire 8 can be excised.

Therefore, in the above-mentioned configuration, the amount of protrusion of the cutting wire 8 into the loop on the flexible tube 1 side of the anti-slip tips 9a, 9b, 9c fixed to the front half of the cutting wire 8 The smallest tip 9c is placed, and the large tips 9b and 9a are sequentially placed with the amount of protrusion of the incision wire 8 gradually increasing toward the distal side. When the loop of the cut incision wire 8 is bound tightly, the treatment part 10 is treated when the non-slip tip 9c, which has a small protrusion amount into the loop on the rear end side of the treatment part 10, functions sequentially from the side. It is possible to reduce the amount of the non-slip tip 9c on the rear end side 10 of the biting part 10 into the lesion.

Therefore, even if the lesion has a small amount of protrusion, the lesion can be tightly bound with the incision wire 8. Therefore, in the strip biopsy, the loop of the incision wire 8 applied to the lesion can be easily bound. It is possible to improve operability.

FIG. 4 shows a second embodiment of the present invention. In this case, a plurality of wire-shaped non-slip tips 11a, 11b, 11c ... Are fixed to the front half of the incision wire 8 by means such as a paddle or a roller. In this case, in each of the tips 11a, 11b, and 11c, a small tip 11c having the smallest protrusion amount into the loop of the incision wire 8 is arranged on the flexible tube 1 side, and the tip of the inside of the loop of the incision wire 8 is arranged. The large chips 11b and 11a are sequentially arranged in such a manner that the amount of protrusion to be gradually increased.

Therefore, in this case as well, when the loop of the incision wire 8 hung on the lesion is bound tightly, the small amount of the small anti-slip tip 11c, which has a small protrusion amount into the loop on the rear end side of the treatment section 10, slides sequentially When the stopper functions, the amount of the slip-prevention chip 11c on the rear end side of the treatment portion 10 biting into the lesion can be reduced, so that the amount of protrusion is small as in the first embodiment. Even at a lesion, the incision wire 8 can securely bind the lesion. The invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the spirit of the invention.

[0024]

[Effect of the device]

 According to the present invention, a plurality of anti-slip tips are fixed to an incision wire, and a large anti-slip tip having a large amount of protrusion of the incision wire into the loop is arranged on the distal end side of the treatment section. Since a small anti-slip tip with a small amount of protrusion of the incision wire into the loop is placed on the end side, it is possible to easily bind the loop of the incision wire hung on the lesion site in strip biopsy, and it is easy to operate. Can be improved.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing the configuration of a main part of a high frequency snare according to a first embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of the entire high frequency snare.

FIG. 3 is a vertical cross-sectional view showing a fixed state of a slip prevention tip of a cutting wire.

FIG. 4 is a vertical cross-sectional view showing a main part configuration of a second embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Flexible tube, 6 ... Operation wire (operation member), 8 ... Incision wire, 9a, 9b, 9c, 11a, 11b, 11c ... Anti-slip tip, 10 ... Treatment part.

Claims (1)

[Scope of utility model registration request] 1. A treatment section, in which a cutting wire is formed in a loop shape and a high-frequency current is passed, is provided at a tip of an operation member which is inserted into a flexible tube so as to be able to advance and retract, and the treatment section is the flexible tube. In a high-frequency incision resecting tool that is operated to project and retract from the tip of, a plurality of anti-slip tips are fixed to the incision wire, and the large-sized anti-slip tip having a large protrusion amount into the loop of the incision wire is A high-frequency incision resecting tool, characterized in that it is arranged on the front end side of the treatment portion, and the small-sized anti-slip tip with a small amount of protrusion of the incision wire into the loop is arranged on the rear end side of the treatment portion.