WO2020055142A1

WO2020055142A1 - Snare catheter

Info

Publication number: WO2020055142A1
Application number: PCT/KR2019/011794
Authority: WO
Inventors: 김준홍; 박기완
Original assignee: 주식회사 타우피엔유메디칼
Priority date: 2018-09-13
Filing date: 2019-09-11
Publication date: 2020-03-19
Also published as: KR20200030766A

Abstract

The present invention relates to a snare catheter and, more specifically, to a snare catheter which allows an operator to fit a snare which has been inserted into a blood vessel or a digestive system to fix or remove a foreign substance, into a commercial catheter, when needed. A snare catheter according to a preferred embodiment of the present invention comprises: a snare formed of a plurality of annular snare parts and one body part having a straight shape; and a catheter tube including an insertion portion where a commercial catheter lumen is formed so that the commercial catheter can be inserted, and a separation portion, extending from an upper end of the insertion portion, in which an upper central hole having a diameter smaller than that of the commercial catheter lumen is formed and a plurality of snare lumens are formed in a circular arrangement around the upper central hole, such that the snare is separated along the plurality of snare lumens.

Description

Snare catheter

The present invention relates to a snare catheter, and more particularly, to a snare catheter that is inserted into a blood vessel or digestive system and used to fix or remove foreign substances into a commercial catheter when the operator needs it.

Minimally invasive porcedure is generally preferred because it can reduce pain and provide a relatively fast recovery time compared to conventional open medical surgery. Many minimally invasive surgeries are performed with an endoscope.

Surgery using an endoscope is divided into two types, one is laparoscopic (whole body anesthesia is required) and one is an endoscope performed without general anesthesia. In the latter case, medical tools and accessories are placed inside the patient through small access holes in the patient's body, allowing manipulation and viewing.

Among them, when performing minimally invasive surgery using an endoscope, for example, when removing polyps in the large intestine by minimally invasive surgery, a surgical instrument that performs surgery employs a snare that catches the tissue and then excises the tissue. Is done.

In the existing snare device, a flexible wire is inserted into the flexible insulating tube, and an operation portion consisting of a device and an operation tool is installed at one end of the wire, and a snare is formed on the other side to push and pull the wire through the operation of the operation tool to pull the noose into the insulation tube. It protrudes from the end of.

The diameter of the noose portion protrudes outward from the end of the insulating tube, and the diameter of the noose portion decreases due to the diameter of the insulating tube when it is input from the end of the insulating tube to the inside.

Therefore, the snare device protrudes the noose part outward of the end of the insulating tube, enlarges the diameter of the noose part, and then inserts a protruding structure such as a polyp inside the noose part, and pulls a wire to reduce the diameter of the noose part to reduce the diameter of the noose part. The tissue is picked up by the noose, and a high-frequency current flows through the wire to treat excision such as polyps and treatment of necrosis and hemostasis.

In addition to removing polyps in the large intestine, medical snares have various guide catheters, EP catheters for arrhythmia procedures, and various purposes for fixing or removing guide wires, blood clots, foreign substances, and abnormal tissues in blood vessels. Is used.

In the conventional snare device, the snare and the insulated tube are composed of one device, and when a different catheter is inserted into the body during the procedure, the catheter must be removed and the snare device must be inserted, and the snare easily includes a single snare, which makes it easy to target the desired target. There is a problem that can not be grasped.

An object of the present invention is to solve the above problems and to provide a snare device applicable to various commercial catheters.

In addition, another object of the present invention is to provide a snare device for inserting a snare without removing an existing catheter if the operator needs it during the catheter procedure.

In addition, the snare device is to provide a snare device that can easily hold, fix or remove a desired target.

The objects of the present invention are not limited to the objects mentioned above, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object of the present invention, a snare catheter according to a preferred embodiment of the present invention includes a snare formed of a plurality of annular lasso parts and a straight body part; And a commercial catheter lumen formed to insert a commercial catheter, and an upper central hole formed to extend from the upper end of the commercial catheter and having a diameter smaller than the diameter of the commercial catheter lumen, centered on the upper central hole. It includes; a catheter tube consisting of a plurality of snare lumens are formed to form a circular arrangement and the snares are separated along the plurality of snare lumens.

The snare lumen is characterized in that the diameter is smaller than the diameter of the upper central hole and is formed on the inner wall of the separation part, and the snare lumen and the upper central hole are in communication with the commercial catheter lumen.

In addition, the snare is characterized in that the ends of the plurality of annular snares and one end of the body are coupled through a coupling body, and the snare is closed when inserted into the snare lumen with a shape memory alloy or an elastic body or a self-expanding stent. It is characterized by unfolding when protruding from the snare lumen.

A snare catheter according to another preferred embodiment of the present invention includes a snare formed of a plurality of annular lasso parts and a single body part in a straight shape; And a commercial catheter lumen is formed so that a commercial catheter is inserted, and an insertion portion in which a snare body moving lumen is formed parallel to the commercial catheter lumen, is formed to extend from the upper end of the commercial catheter, and has a diameter greater than the diameter of the commercial catheter lumen. The branch has a central space portion formed with a central portion hole, and is formed to extend from an upper end of the central space portion, and has an upper central hole having a diameter smaller than the diameter of the central portion, and a plurality of circularly arranged centers around the upper central hole. A catheter tube having a snare lumen formed and a separation part separating the snare along the plurality of snare lumens; It includes.

At this time, the moving lumen of the snare body is smaller than the diameter of the commercial catheter lumen, and is characterized in that it is formed on the inner wall of the insert, and the snare lumen has a diameter smaller than the diameter of the upper central hole and the separation inner wall. It is characterized by being formed in.

In addition, the snare lumen and the upper central hole are in communication with the central hole, and the central hole is characterized in that the commercial catheter lumen and the snare body portion moving lumen is in communication, the snare is the plurality of annular snare parts It characterized in that the end and one end of the body portion is coupled through a coupling body.

The snare is a shape memory alloy or an elastic body or a self-expanding stent, which is closed when inserted into the snare lumen and unfolds when projecting from the snare lumen, and the body is inserted into the snare body moving lumen and the body moving lumen It is characterized in that the operator of one side of the body portion 120 that has passed through the body 224 and pushed or pulled.

The snare catheter according to the present invention can be used with various commercial catheters.

In addition, the operator can use the snare at a desired position by inserting the snare catheter according to the present invention without removing or moving the catheter inserted into the body first if necessary.

In addition, a desired target can be easily fixed or removed from the body using a plurality of lasso parts.

1 is a perspective cross-sectional view of a snare catheter according to a preferred embodiment of the present invention.

Figure 2 is a perspective cross-sectional view showing the snare of the snare catheter according to a preferred embodiment of the present invention.

3 is a perspective cross-sectional view of a snare catheter according to another preferred embodiment of the present invention.

4 is a perspective sectional view showing a commercial catheter inserted into a snare catheter according to a preferred embodiment of the present invention.

100: snare

110: noose

120: body

130: conjugate

200: catheter tube

210: separation

212: Upper Central Hall

214: Snare Lumen

220: insert

222: commercial catheter lumen

224: Snare body moving lumen

230: Central Space Department

232: Central Hall

300: commercial catheter

Advantages and features of the present invention, and methods for achieving them will be clarified with reference to embodiments described below in detail along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only the present embodiments allow the disclosure of the present invention to be complete, and the ordinary knowledge in the technical field to which the present invention pertains. It is provided to fully inform the holder of the scope of the invention, and the invention is only defined by the scope of the claims.

Hereinafter, specific contents for carrying out the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals refer to the same components regardless of the drawings, and "and / or" includes each and every combination of one or more of the mentioned items.

Although the first, second, etc. are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are only used to distinguish one component from another component. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical spirit of the present invention.

The terminology used herein is for describing the embodiments, and is not intended to limit the present invention. In the present specification, the singular form also includes the plural form unless otherwise specified in the phrase. As used herein, “comprises” and / or “comprising” does not exclude the presence or addition of one or more other components other than the components mentioned.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used as meanings commonly understood by those skilled in the art to which the present invention pertains. In addition, terms defined in the commonly used dictionary are not ideally or excessively interpreted unless specifically defined.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective cross-sectional view of a snare catheter according to a preferred embodiment of the present invention. Referring to FIG. 1, a snare catheter according to a preferred embodiment of the present invention includes a snare 100 and a catheter tube 200.

The snare 100 consists of a plurality of lasso parts 110 that are annular and one body part 120 that is linear. The snare is stainless steel or a wire made of Nitinol or metal, and is a shape memory alloy or an elastic body or a self-expanding stent.

Both ends of the plurality of annular parts 110 and one end of the body part 120 are coupled by a coupling body 130. The other end of the body portion 120 is located outside the body, the operator can move the lasso portion 110 by pushing or pulling the other end of the body portion 120. The assembly 130 is a stainless steel or Nitinol or a metal-made hypo-tube. The noose portion 110 and the body portion 120 are coupled to the coupling body 130 by crimping or welding.

The catheter tube 200 is preferably a cylindrical tube shape, but is not limited to this, and may be made of synthetic resin materials such as soft rubber materials, soft plastic materials, soft, high ductility, excellent flexibility and resilience, and insulation Phosphorus material is used.

The catheter tube 200 includes a separation part 210 and an insertion part 220. The insertion part 220 is a portion into which a commercial catheter 300 is inserted, and a commercial catheter lumen 222 is formed therein.

The separation portion 210 is formed to extend from the top of the insertion portion 220, and the separation portion 210 includes an upper central hole 212 and a snare lumen 214. The upper central hole 212 is formed coaxially with the commercial catheter lumen 222, but has a smaller diameter than the commercial catheter lumen 222. A plurality of the snare lumens 214 are formed on the inner wall of the separation part 210 to form a circular arrangement around the upper center hole 212, and the diameter of the snare lumens 214 is the upper center hole 212 ) Is smaller than the diameter and is formed at regular intervals. Referring to FIG. 1, the snare lumens 214 are shown as three, but the snare lumens 214 may be three or more, and two snare lumens 214 may be formed.

A plurality of snare parts 110 are respectively inserted into the plurality of snare lumens 214, and when the operator pushes the other end of the body part 120 outside the body, the lasso part 110 protrudes, and the body part When the other end of 120 is pulled, the lasso 110 is inserted into the snare lumen 214. At this time, since the snare 100 is a shape memory alloy or an elastic body or a self-expanding stent, the diameter is enlarged when the noose part 110 protrudes, and again when the noose part 110 is inserted into the snare lumen 214 The diameter is reduced.

The upper central hole 212 and the snare lumen 214 communicate with the commercial catheter lumen 222.

Accordingly, the snare catheter according to the present invention inserts the commercial catheter 300 first inserted into the body into the upper central hole 212 and the commercial catheter lumen 222, and the snare along the commercial catheter 300 The catheter can be inserted into the body and the snare can be used at the position desired by the operator.

Referring to FIG. 2, in the snare catheter according to the preferred embodiment of the present invention, the body portion 120 is located in the commercial catheter lumen 222.

1, one end of the body portion 120 is coupled by a coupling body 130, and the other end of the body portion 120 is placed outside the body through the commercial catheter lumen 222, and the operator The lasso portion 110 may be moved by pushing or pulling the other end of the body portion 120 located outside the body.

2 shows that the snare 110 is inserted into the snare lumen 214 by pulling the other end of the body 120.

3 is a perspective cross-sectional view of a snare catheter according to another preferred embodiment of the present invention. 3, the snare catheter according to another preferred embodiment of the present invention includes a snare 100 and a catheter tube 200, the snare 100 is as described above in FIG. The catheter tube 200 includes a separation part 210, an insertion part 220, and a central space part 230.

The insertion portion 220 includes a commercial catheter lumen 222 and a snare body moving lumen 224. The commercial catheter lumen 222 is a portion into which the commercial catheter 300 is inserted, and the snare body moving lumen 224 is formed parallel to the commercial catheter lumen 222 on the inner wall of the insert 220. . The snare body portion moving lumen 224 is characterized in that it is formed smaller than the diameter of the commercial catheter lumen 222, the snare body portion moving lumen 224 is the body portion 120 of the snare 100 Is inserted.

The central space portion 230 is formed so as to extend from the top of the insertion portion 220, and the central space portion 230 includes a central portion hole 232. The central hole 232 is formed to be coaxial with the commercial catheter lumen 222 and is characterized by having a larger diameter than the commercial catheter lumen 222. The snare body moving lumen 224 and the commercial catheter lumen 222 communicate with the central hole 232.

The separation portion 210 is formed to extend from the top of the central space portion 230, and the separation portion 210 includes an upper central hole 212 and a snare lumen 214. The upper central hole 212 is formed to be coaxial with the central hole 232 and has a diameter smaller than the diameter of the central hole 232. The snare lumen 214 is formed to form a circular arrangement around the upper center hole 212, and the snare lumen 214 is formed to have a diameter smaller than the diameter of the upper center hole 212.

The plurality of snare parts 110 of the snare 100 are respectively inserted into the snare lumen 214, and the coupling member 130 combining one end of the snare part 110 and the body part 120 is the center. It is located in the space portion 230 and the other end of the body portion 224 penetrates the snare body portion moving lumen 224 and is located outside the body.

The operator adjusts the snare 100 by pushing or pulling the other end of the body part 120 that has passed through the body movement lumen 224 and came out of the body.

The snare catheter according to the present invention inserts a commercial catheter 300 into the snare catheter as shown in FIG. 4.

The commercial catheter 300 first inserted into the body is inserted into the upper central hole 212 and the commercial catheter lumen 222 to move into the body along the commercial catheter 300 to a desired position by the operator, and the snare ( 100) can be used.

Therefore, the snare catheter according to the present invention can be used with a variety of commercial catheters, and the practitioner wants the position by inserting the snare catheter according to the present invention without removing or moving the catheter inserted into the body first if necessary. You can use snare.

Although the embodiments of the present invention have been described with reference to the above and the accompanying drawings, those of ordinary skill in the art to which the present invention pertains can implement the present invention in other specific forms without changing its technical spirit or essential features. You will understand that there is. Therefore, it should be understood that the above-described embodiments are illustrative in all respects and not restrictive.

Claims

In the snare catheter,

A snare formed of a plurality of annular lasso parts and a straight body part; And

Insertion portion is formed with a commercial catheter lumen so that the commercial catheter is inserted,

It is formed to extend from the upper end of the insertion portion, the upper central hole having a diameter smaller than the diameter of the commercial catheter lumen is formed, a plurality of snare lumens are formed to form a circular arrangement around the upper central hole, the plurality of snares A catheter tube made of a separating part in which the snare is separated along a lumen;

Snare catheter comprising a.
According to claim 1,

The snare lumen is a snare catheter, characterized in that the diameter is smaller than the diameter of the upper central hole and is formed on the inner wall of the separator.
According to claim 1,

Snare catheter, characterized in that the snare lumen and the upper central hole communicate with the commercial catheter lumen.
According to claim 1,

The snare is a snare catheter, characterized in that the ends of the plurality of annular snares and one end of the body are coupled through a coupling body.
According to claim 1,

The snare is a shape memory alloy or an elastic body or a self-expanding stent, which shrinks when inserted into the snare lumen and unfolds when protruding from the snare lumen.
In the snare catheter,

A snare formed of a plurality of annular lasso parts and a straight body part; And

A commercial catheter lumen is formed so that a commercial catheter is inserted, and an insertion part having a snare body moving lumen parallel to the commercial catheter lumen,

It is formed to extend from the top of the insertion portion, the central space portion is formed with a central hole having a diameter larger than the diameter of the commercial catheter lumen,

It is formed to extend from the upper end of the central space portion, an upper central hole having a diameter smaller than the diameter of the central portion hole is formed, a plurality of snare lumens are formed to form a circular arrangement around the upper central hole, the plurality of snare lumens A catheter tube consisting of a separating part in which the snare is separated;

Snare catheter comprising a.
The method of claim 6,

The snare catheter is characterized in that the moving lumen of the snare body is smaller than the diameter of the commercial catheter lumen and is formed on the inner wall of the insert.
The method of claim 6,

The snare lumen has a diameter smaller than the diameter of the upper central hole, and a snare catheter, characterized in that formed on the inner wall of the separation portion.
The method of claim 6,

The snare lumen and the upper central hole communicate with the central portion hole,

The central hole is a snare catheter, characterized in that the commercial catheter lumen and the snare body portion is in communication with the moving lumen.
The method of claim 6,

The snare is a snare catheter, characterized in that the ends of the plurality of annular snares and one end of the body are coupled through a coupling body.
The method of claim 6,

The snare is a shape memory alloy or an elastic body or a self-expanding stent, which shrinks when inserted into the snare lumen and unfolds when protruding from the snare lumen.
The method of claim 6,

The body portion is inserted into the snare body movement lumen, the snare catheter, characterized in that the operator pushes or pulls one side of the body portion that has passed through the body movement lumen and comes out of the body to move the noose.