KR102307346B1 - Stent Insertion device - Google Patents

Abstract

An object of the present invention is to provide a bidirectional ureteral stent used to expand and maintain a narrowed ureter into a space of a certain volume. Accordingly, disclosed is a bidirectional ureteral stent connector comprising: first and second stents which forms an incision unit by making an incision in the middle of the ureter connecting the kidney and the bladder, respectively, and is inserted into each side through the incision unit to expand a passage; and a connector which is inserted through the incision unit and in which the corresponding ends of the first and second stents are fitted on both sides of the intermediate body to maintain the connection state, respectively.

Description

ureteral stent bidirectional connector {Stent Insertion device}

The present invention relates to a ureteral stent used to expand and maintain a narrowed ureter into a space of a certain volume, and more particularly, after cutting the middle part of the ureter connecting the kidney and the bladder, the stent is inserted through it on both sides, It relates to a ureteral stent bidirectional connector that connects them through a connector to secure a passageway through which urine flows and maintain the lumen.

The ureteral stent secures a way for urine to flow when the ureter is narrowed or blocked due to primary malignant tumors of the urinary system, metastasis from malignant tumors of other organs, infection, tuberculosis, stones, trauma, and injuries during surgery, etc. It is inserted into the ureter to reduce the pressure in the urinary tract leading up to the ureter.

These ureteral stents are about 12 to 23 cm in length, and as shown in FIG. 1, one end is located in the kidney and the other is located in the bladder, and both ends are rolled in a circle like a pig's tail to prevent the stent from moving. A DJ (double-J) stent made of a flexible polymer material with biocompatibility is the most widely used.

However, the conventional ureteral stent has a problem in that the kidney or bladder must be opened and inserted from either side, and if there is a stone in the middle part of the ureter, the ureter is incised and inserted after an additional kidney or bladder incision. .

In addition, the length of the ureteral stent cannot be adjusted because it is provided with a predetermined length to pass through the entire length of the ureter to accommodate the ureter length range of various patients such as dogs or cats, and thus enter the kidney and bladder. In the case of a ring shaft whose length is different from the average length, there is a limitation in that it is very difficult to insert it with an appropriate length.

On the other hand, one end of the general guide wire used to guide the ureteral stent into the ureter is thinner and more flexible than the middle part, and it has a thicker and harder structure toward the middle part, so it can induce the stent while minimizing stimulation in the human body. can

And the pusher used to insert the ureteral stent into the ureter is similar to the diameter of the stent, and although the material is polymer-based, the tip is made more rigidly, so that one end of the stent can be effectively pushed into it.

In the conventional ureteral stent insertion procedure, a guide wire is inserted through the ureter to the kidney, the guide wire is inserted into the middle lumen of the ureteral stent, both ends of the ureteral stent are stretched in a straight line, and a pusher is inserted into the guide wire in a straight line. Push the outer end of the stretched ureteral stent and insert it along the guide wire to the kidney. Thereafter, when the guide wire and the pusher are removed, only the ureteral stent remains in the human body to secure a passageway through which urine of the ureter flows and maintain the lumen.

The background art or prior art described herein is information possessed by the inventor or acquired in the process of deriving the present invention, and is only intended to help understand the technical meaning of the present invention, and prior to the filing of the present invention, the technology to which this invention belongs It does not mean that the technology is widely known in the field.

KR Patent Publication No. 10-2010-0090986 Publication Date 2010.08.18 KR Patent Publication No. 10-2018-0124847 Publication Date 2018.11.21 KR Patent Registration No. 10-2007179 Registration Date 2019.07.30 KR Patent Registration No. 10-1501445 Registration Date 2015.03.05

Accordingly, the present inventor comprehensively considers all the above and at the same time, in the idea of solving the technical limitations and problems of the existing ureteral stent, a new ureteral stent device that allows the stent to be conveniently operated in the ureter connecting the kidney and the bladder The present invention was created as a result of incessant research by making every effort to develop a.

Therefore, the technical problem and object to be solved by the present invention is to make an incision approximately in the middle of the ureter connecting the kidney and the bladder, and then sequentially insert the stents on both sides through this, and connect the corresponding end of the inserted stent with a connector for a convenient operation It is to provide a bidirectional stent connector that allows

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

A specific means according to an embodiment of the present invention for effectively achieving a specific technical purpose while embodying a new idea for solving the technical problem of the present invention as described above is, in the middle of the ureter connecting the kidney and the bladder The first and second stents are inserted through the incision to form an incision and are respectively inserted through the incision on both sides to expand the passage, and the first and second stents are inserted through the incision and on both sides with respect to the intermediate body. A ureteral stent bidirectional connecting device is provided, including a connector in which the corresponding ends of each are fitted to maintain a connected state.

Accordingly, in the present invention, the first and second stents are sequentially inserted in different directions through the incision of the ureter, and the corresponding ends of the inserted first and second stents are connected with a connector, so that they can be conveniently mounted.

In a preferred embodiment of the present invention, the intermediate body forms a first insertion portion in which at least one first locking jaw protrudes from the outer circumferential surface so that the first stent is not inserted into one side of the central guide hole communicating with the passage, and the other side It can be configured by forming a second inserting portion in which at least one second locking jaw protrudes from the outer peripheral surface so as not to be inserted into the second stent and fall out.

In another embodiment of the present invention, the intermediate body may form an occlusion prevention line cut along the longitudinal direction including the first and second insertion portions.

In another embodiment of the present invention, it is possible to apply that the fixing groove is formed so that the ends of the first and second stents fitted into the first and second inserts are fitted on both sides of the intermediate body to maintain a fixed state. have.

In another embodiment of the present invention, a screw hole is formed in the intermediate body along the axial direction, and a screw portion screwed to the screw hole is formed at the ends of the first and second inserts, and it can be applied to each other. have.

According to the technical idea and embodiment of the present invention, which is based on a unique solution to solve the above technical problem, the first and second stents are inserted in both directions through an incision made approximately in the middle of the ureter, respectively Then, by connecting the corresponding end with a connector, it can be mounted (stenting) without additional incision of the kidney or bladder, and can be safely and efficiently mounted by adjusting the appropriate length according to the length of the ureter of various affected axes.

In addition, an occlusion prevention line of a cut-out type is formed on one side of the central guide hole communicating with the passage in the connector, so that when the central guide hole is blocked, an open state is maintained to prevent the occlusion phenomenon.
In other words, when the central guide hole and the occlusion prevention line on one side maintain an open state and the central guiding hole is blocked, the occlusion prevention line maintains an open state, thereby serving as a passage without clogging.

In addition, since both sides of the connector can be assembled from the intermediate body, there is an effect of simplifying manufacturing as well as simplifying assembly and improving installation efficiency.

Here, the effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a schematic diagram showing a state in which the ureteral stent bidirectional connection device according to the present invention is installed.
Figure 2 is an exploded front view of the ureteral stent bidirectional connection device according to an embodiment of the present invention.
Figure 3 is an enlarged perspective view showing a connector among the components constituting the ureteral stent bidirectional connection device according to an embodiment of the present invention.
FIG. 4 is a longitudinal cross-sectional view of FIG. 3 .
5 is a cross-sectional view showing another example of a connector according to the present invention.
FIG. 6 is a plan view illustrating the plane of FIG. 4 .
7 is a perspective view showing another example of a connector according to the present invention.
8 is a cross-sectional view showing another example of a connector according to the present invention.

Hereinafter, an embodiment according to the present invention will be described in more detail with reference to the accompanying drawings.

Prior to this, the following terms are defined in consideration of the functions in the present invention, and it is specified that they should be interpreted as concepts consistent with the technical spirit of the present invention and meanings commonly or commonly recognized in the art.

In addition, if it is determined that a detailed description of a well-known function or configuration related to the present invention may obscure the gist of the present invention, the detailed description thereof will be omitted.

The accompanying drawings show that parts are exaggerated or simplified for the sake of convenience and clarity of explanation and understanding of the configuration and operation of the technology, and it is revealed that each component does not exactly correspond to the actual size and shape.

In addition, in this specification and/or the term "and/or" is meant to include a combination of a plurality of related described items or any of a plurality of related described items, and when a part includes a certain component, it is a particularly opposite description This does not mean that other components are excluded, but other components can be further included.

That is, terms such as 'comprising' or 'having', 'having', etc. mean that the features, number, steps, operations, components, parts, or combinations thereof set forth in this specification exist, one or It is to be understood that this does not exclude the possibility of adding or adding other features or numbers, step operation components, parts, or combinations thereof.

In addition, each step may occur in a different order from the stated order unless the context clearly indicates a specific order. That is, each step may occur in the same order as specified, may be performed substantially simultaneously, or may be performed in the reverse order.

And terms such as upper, lower, upper, lower, or upper, lower, upper, lower, front and rear, left and right are used for convenience to distinguish relative positions of each component. For example, the upper side in the drawing may be named or referred to as the upper side and the lower side as the lower side, the longitudinal direction may be named or referred to as the front-back direction, and the width direction may be named or referred to as the left/right direction.

Also, terms such as first, second, etc. may be used to describe various components. That is, terms such as 1st, 2nd, etc. may be used only for the purpose of distinguishing one component from another component. For example, a first component may be referred to as a second component without departing from the protection scope of the present invention, and the second component may also be referred to as a first component.

On the other hand, the term "lumen" used in the present invention means a passage through the center of the ureteral stent. One end of the lumen opens into the kidney and the other end of the lumen opens into the bladder. The term “stenting” refers to the process of placing a ureteral stent in a patient. The term “guide wire” refers to a thin, flexible wire used to place a ureteral stent. The term "pusher" refers to a thin, flexible tube that wraps around a guide wire and is used to advance a ureteral stent along the guide wire.

The present invention relates to a ureteral stent bidirectional connector for connecting a ureter to a stent.

1 to 4, the ureteral stent bidirectional connection device according to the present invention includes a first stent 10, a second stent 20 and a connector (30).

The first stent 10 has a constant length and diameter and is formed in a tube shape with a lumen.

The second stent 20 has a constant length and diameter and is formed in a tube shape with a lumen.

Here, the end of the first stent 10 and the second stent 20 entering the kidney S and the bladder B may be curved or coiled to prevent displacement.

In addition, the first stent 10 and the second stent 20 may be made of a radiopaque material whose position can be confirmed by X-ray or fluoroscopy.

In addition, the polymers constituting the first stent 10 and the second stent 20 may include radiopaque or opaque markers. For example, the first stent 10 and the second stent 20 may include radiopaque markers at regular intervals (3 to 5 cm) along their length.

In addition, the first stent 10 and the second stent 20 may have a hydrophilic coating to improve the patient's comfort or to facilitate insertion.

In addition, the first stent 10 and the second stent 20 may be coated with an antibacterial or antimicrobial single material or a combination of multiple materials, such as heparin, to reduce infection or encrustation. .

And an appropriate length of the first stent 10 and the second stent 20 is 8 to 25 cm, preferably 10 to 23 cm, and the outer diameter may be formed to a size that matches the diameter of a typical dog or cat ureter (U). have.

The connector 30 is formed in a tubular shape with a lumen in order to interconnect both ends by inserting both ends into the first stent 10 and the second stent 20 .

That is, the connector 30 has a first insertion part 31 and a second insertion part 32 on both sides with the middle body 33 as the center, and a center guide hole H is formed at the center along the axial direction. is formed

The first insertion part 31 is formed to be inserted into the first stent 10 .

And on the outer circumferential surface (outer curved surface) of the first insertion part 31, the first locking jaw 31a to prevent it from being easily pulled out while being fitted in the first stent 10 is formed to protrude in multiple stages at least one or more along its longitudinal direction. has been

The second insertion portion 32 is formed to be inserted into the second stent 20 .

And on the outer circumferential surface (outer curved surface) of the second insertion part 32, a second locking jaw 32a that does not easily fall out while being fitted in the second stent 20 is formed to protrude in multiple stages at least one or more along its longitudinal direction. has been

Here, the first insertion portion 31 is inserted into the second stent 20 , and the second insertion portion 32 may be inserted into the first stent 10 , of course.

In addition, in order to easily fit the first insertion part 31 and the second insertion part 32 into the first stent 10 and the second stent 20, as well as to stably maintain the combined state, the first locking jaw (31a) and the second locking protrusion (32a) is preferably formed in the shape of an approximate cross-section having an inclined plane toward the outside in opposite directions to each other in a right triangle shape.

In addition, the first stent 10, which is inserted by forming a wedge-shaped first and second fixing jaws 34a and 35a between the intermediate body 33 and the first and second locking jaws 31a and 32a. And the second stent 20 is more firmly fixed.

The middle body 33 has an outer diameter greater than the outer diameter of the first and second insertion portions 31 and 32, and one end of the first stent 10 and the second stent 20 faces each other and is in close contact. formed to be

Here, as the material of the connector 30, it is possible to minimize irritation by manufacturing it using stainless steel, a shape memory alloy, Nitinol, a cobalt alloy, a nickel alloy, and the like.

A procedure method through a ureteral stent bidirectional connection device according to an embodiment of the present invention will be described as follows.

First, as shown in FIG. 1 , the middle portion of the ureter (U) is cut, and a guide wire is inserted into the proximal ureter (U) through the incision. At this time, of course, the guide wire may be inserted into the distal ureter (U). Then, the first stent 10 having a constant length and diameter along the guide wire is inserted into the renal pelvis of the kidney (S). Then, after removing the guide wire, the exposed portion of the first stent 10 is cut. Successively, one end of the tubular connector 30 having a lumen at the end of the first stent 10 is inserted and fixed, and another guide wire is inserted into the distal ureter through the incision, and a certain length and diameter are drawn along the guide wire. The second stent 20 having the is inserted into the bladder (B). In this case, of course, the guide wire may be inserted into the proximal ureter. After continuously removing the guide wire, the exposed portion of the second stent 20 is cut. Sequentially, by inserting the opposite end of the connector 30 to the end of the second stent 20, the first stent 10 and the second stent 20 are interconnected, and then the incision is sutured.

In this way, the middle part of the ureter (U) is cut, and the first and second stents 10 and 20 are inserted through the incision in the up and down direction, and then the connector 30 is inserted and connected to the kidney (S) or bladder ( B) can be easily mounted (stenting) without additional incision.

5 and 6 are another example of a connector in the stent bidirectional connecting device according to the present invention, wherein the intermediate body 33 constituting the connector 30a includes the first and second insertion portions 31 and 32. Thus, it is shown that the occlusion prevention line 50 in an open form is formed by incision along the longitudinal direction.

The occlusion prevention line 50 is elastically in close contact with the inner diameter of the first and second stents 10 and 20 fitted to the first and second insertion parts 31 and 32 through the elasticity of the incision shape. In addition, when the central guide hole (H) connected to the passage is narrowed and an occlusion phenomenon occurs, it serves to form a detour, thereby preventing the occlusion phenomenon.

7 is another example of a connector in the stent bidirectional connecting device according to the present invention, the first and second insertion portions 31 and 32 on both sides of the intermediate body 33 constituting the connector 30b. It is shown that the fixing groove 60 is formed so that the ends of the first and second stents 10 and 20 that are fitted and coupled are fitted while maintaining a fixed state.

The fixing groove 60 allows the ends of the first and second stents 10 and 20 to be fitted into the first and second inserts 31 and 32 to maintain a stable fixed state.

8 is another example of a connector in the stent bidirectional connection device according to the present invention, so that the screw hole 70 is formed through the inner side of the intermediate body 33 constituting the connector 30c, and the first and second 2 It is shown that the screw parts 38 and 39 screwed to the screw hole 70 are formed at the ends of the insertion parts 31 and 32 so that they can be coupled to each other in a separated state.

That is, the first and second screws are symmetrically screwed into the screw holes 70 of the intermediate body 33 through the screw portions 38 and 39 formed in the first and second insertion portions 31 and 32 , respectively. The stents 10 and 20 can be coupled, and the first and second inserts 31 and 32 are respectively fixed to the first and second stents 10 and 20, respectively, and then the ureter (U) It can be installed by inserting it inside.

The screw hole 70 may be formed with a protrusion so that the ends of the first and second stents 10 and 20 are caught and fixed in the middle of the inner side, and the screw hole 70 is a projection and a groove that is not in a spiral direction. It is made in the form of this continuously repeated protrusion coupling portion so that the first and second stents 10 and 20 are fitted with the protrusion coupling portion formed at the end thereof.

Here, among the components related to the ureteral stent according to another embodiment of the present invention, the components having the same or similar effects as those of the above-described embodiment use the same reference numerals, and repetitive and detailed description thereof will be omitted.

On the other hand, the present invention is not limited by the above-described embodiment and the accompanying drawings, and can be variously modified and applied in various ways not illustrated within the scope without departing from the technical spirit of the present invention, as well as each It is apparent to those of ordinary skill in the art to which the present invention pertains that it can be widely applied by changing the substitution of components and other equivalent embodiments.

Therefore, the contents related to the modification and application of the technical features of the present invention should be interpreted as being included within the technical spirit and scope of the present invention.

U: ureter
S: kidney
B: bladder
10: first stent 20: second stent
30,30a,30b,30c: connector
H: central information hall
31: first insertion portion 32: second insertion portion 33: middle body
50: blockage prevention line
70: screw hole

Claims (5)

The first and second stents 10 and 20 connecting the kidney (S) and the bladder (B) are respectively inserted into both sides through the middle incision of the ureter (U) to expand the passage, and both ends are and a connector 30a connecting the first and second stents 10 and 20 and forming a central guide hole H along the axial direction to be connected to the passage;
The connector 30a,
The intermediate body 33, and the first inserting part 31 with at least one first locking protrusion 31a protruding from the outer peripheral surface so that the first stent 10 is not inserted into one side of the intermediate body 33 and , to be fitted to the second stent 20 on the other side of the intermediate body 33 so that the second engaging projection 32a is formed with at least one protruding second insertion portion 32 on the outer circumferential surface so as not to fall out;
A ureteral stent bidirectional connection device, characterized in that the ureteral stent is communicated with the central guide hole (H) on the outside of the connector (30a) and forms an occlusion prevention line (50) cut along the longitudinal direction.
delete delete According to claim 1,
A ureteral stent bidirectional connector, characterized in that the ends of the first and second stents fitted into the first and second inserts are fitted on both sides of the intermediate body to form a fixing groove to maintain a fixed state.
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