KR102230324B1 - Stent delivery system and stent knot method - Google Patents

Abstract

The stent delivery system of the present invention forms a plurality of cells 20 by weaving wires together, and has a hollow cylindrical shape, and the cell 20 includes an end cell 30 formed at the end of the stent 1, The stent insertion device includes a passing tube (2) for guiding a guide wire, and the stent (1) is fastened to the passing tube (2) by a knot, and the knot is inserted into the end (40) of the end cell (30). And a first knot 210 passing through the end cell 30 in a zigzag and a second knot 220 crossing the end cell 30.

Description

Stent delivery system and stent knot method {STENT DELIVERY SYSTEM AND STENT KNOT METHOD}

The present invention relates to a stent delivery system and a stent knotting method, and more particularly, to a stent delivery system and a stent knotting method for minimizing resistance by blood flow in blood vessels by reducing the volume of the end of the stent.

With the development of medicine, procedures for inserting stents into various human organs such as blood vessels, esophagus, and biliary tract are increasing. A stent is a medical device that is inserted into human organs such as blood vessels, esophagus, and biliary tract to resolve strictures caused by blood clots or tumors in organs such as blood vessels, esophagus, and biliary tract to secure a certain inner diameter of blood vessels, esophagus, and biliary tract. As, it is made of shape memory alloy.

On the other hand, since the stent used for blood vessels is covered with an artificial blood vessel material, when the stent is installed in the aneurysm of the blood vessel with a stent insertion device, when the tip of the stent is expanded due to expansion, the blood is transferred to the artificial blood vessel material of the stent. Since it flows only inside, there is a problem that resistance by the flow of blood in the blood vessel is severely applied.

Therefore, in order to solve the above-described problem, there was a technique of controlling the expansion due to expansion by bending the cells at the end of the stent, but the volume itself at the end of the stent was slightly reduced, so that resistance due to the flow of blood in the blood vessel was still severely applied. There was a problem.

In addition, when the volume of the end of the stent is minimized, blood flows only outside the artificial blood vessel material of the stent, and thus there is a problem that resistance by the flow of blood is severely applied.

In view of these circumstances, the present invention provides a stent delivery system and a stent knot method for minimizing resistance by blood flow in blood vessels by effectively reducing the volume of the end of the stent.

However, the subject of the present invention is not limited to the above-mentioned subject, and another subject not mentioned will be clearly understood by those skilled in the art from the following description.

In the present invention, the stent 1 forms a plurality of cells 20 by weaving wires together, and has a hollow cylindrical shape, and the cell 20 includes an end cell 30 formed at the end of the stent 1 And, the stent insertion device includes a passing tube (2) for guiding a guide wire, the stent (1) is fastened to the passing tube (2) by a knot, the knot is, the end (40) of the end cell (30) It characterized in that it comprises a first knot 210 passing through the end cell 30 in a zigzag and a second knot 220 crossing the end cell 30 while wearing.

In addition, according to an embodiment of the present invention, the stent insertion device includes a delay wire 3 coupled to the passing tube 2, and the delay wire 3 includes a first knot 210 and a second knot 220 ).

Further, according to an embodiment of the present invention, the second knot 220 is characterized in that it has a plurality of straight portions and curved portions, and the curved portions are formed in a part of the contact point of the end cell and the delay wire 3.

In addition, according to an embodiment of the present invention, the end cell 30 is composed of first to seventh end cells 31.1, 31.2, 31.3, 31.4, 31.5, 31.6, 31.7 in a clockwise direction, and a curved portion is formed. The contact point of the end cell is the contact point of the first end cell 31.1 and the second end cell 31.2, the contact point of the third end cell 31.3 and the fourth end cell 31.4, the fifth end cell 31.5 and It is characterized by being a contact point of the sixth end cell (31.6), the contact point of the seventh end cell (31.7) and the first end cell (31.1).

Further, according to an embodiment of the present invention, the end cell 30 is composed of first to eighth end cells (32.1, 32.2, 32.3, 32.4, 32.5, 32.6, 32.7, 32.8) in a clockwise direction, and the curved portion The contact points of the end cells to be formed are the contact points of the first end cells 321 and the second end cells 32.2, the contact points of the third end cells 32.3 and the fourth end cells 3244, and the fourth end cells 3244. ) And the contact point of the fifth end cell 32.5, the contact point of the fifth end cell 32.5 and the sixth end cell (32.6), the contact point of the sixth end cell (32.6) and the seventh end cell (32.7), the eighth It is characterized in that it is the contact point of the end cell 32.8 and the first end cell 332.

Further, according to an embodiment of the present invention, the end cells 30 are composed of first to ninth end cells (33.1, 33.2, 33.3, 33.4, 33.5, 33.6, 33.7, 33.8, 33.9) in a clockwise direction, The contact points of the end cells on which the bend is formed are the contacts of the first end cell 33.1 and the second end cell 33.2, the contact of the third end cell 33.3 and the fourth end cell 33.4, and the fourth end cell. (33.4) and the contact point of the fifth end cell (33.5), the contact point of the sixth end cell (33.6) and the seventh end cell (33.7), the contact point of the seventh end cell (33.7) and the eighth end cell (33.8), It is characterized by being the contact point of the ninth end cell (33.9) and the first end cell (33.1).

In addition, according to an embodiment of the present invention, the second knot 220 is symmetrical around the first end cell, and each of the curved portions is characterized in that there are two.

On the other hand, in the present invention, the stent 1 forms a plurality of cells 20 by weaving wires together, and has a hollow cylindrical shape, and the cell 20 includes an end cell 30 formed at the end of the stent. , The stent insertion device includes a passing tube (2) for guiding the guide wire and a delay wire (3) coupled to the passing tube, and a ring made of a first medical thread fits the ends 40 of the end cells 30 and ends. A first knot-forming step of passing the cell 30 in a zigzag, passing the delay wire 3 through both ends of the ring, pulling the ring and tying it to the passing tube 2, and the second medical use tied to the passing tube 2 It characterized in that it comprises a second knot forming step of wrapping the delay wire (3) after both ends of the thread cross the end cell (30), and pulling both ends of the second medical thread to tie it to the passing tube (2).

Further, according to an embodiment of the present invention, the end cell 30 is composed of the first to seventh end cells 31.1, 31.2, 31.3, 31.4, 31.5, 31.6, 31.7 in a clockwise direction, forming a second knot In the step, one end of the second medical seal is curved at the contact point of the first end cell 31.1 and the second end cell 31.2 to cross the second and third end cells 31.2, 31.3 in a straight line, and the third end It is curved at the contact point of the cell 31.3 and the fourth end cell 31.4 to wrap the delay wire 3, and the other end of the second medical seal is at the contact point of the first end cell 31.1 and the seventh end cell 31.7. It is curved and crosses the sixth and seventh end cells 31.6, 31.7 in a straight line, and is curved at the contact point of the fifth end cell 31.5 and the sixth end cell 31.6 to wrap the delay wire 3.

Further, according to an embodiment of the present invention, the end cell 30 is composed of the first to eighth end cells (32.1, 32.2, 32.3, 32.4, 32.5, 32.6, 32.7, 32.8) in a clockwise direction, and the second In the knot forming step, one end of the second medical thread is curved at the contact point between the first end cell 321 and the second end cell 332. Traverse and bent at the junction of the third end cell 32.3 and the fourth end cell 3244 to cross the fourth end cell 3244 in a straight line, and the fourth end cell 332.4 and the fifth end cell 32.5 ) And wraps the delay wire 3, and the other end of the second medical seal is bent at the contact point of the first end cell 321 and the eighth end cell 32.8, Eight end cells 32.8 are traversed in a straight line, and bent at the contact point of the seventh end cells 32.7 and the sixth end cells 32.6 to traverse the sixth end cells 32.6 in a straight line, and the fifth end cells ( 32.5) and the sixth end cell (32.6) is curved at the contact point and is characterized in that it surrounds the delay wire (3).

Further, according to an embodiment of the present invention, the end cells 30 are composed of first to ninth end cells (33.1, 33.2, 33.3, 33.4, 33.5, 33.6, 33.7, 33.8, 33.9) in a clockwise direction, In the second knot forming step, one end of the second medical thread is bent at the contact point of the first end cell 33.1 and the second end cell 33.2 to form the second end cell 33.2 and the third end cell 33.3. Straight across, curved at the junction of the third end cell (33.3) and the fourth end cell (33.4) to cross the fourth end cell (33.4) in a straight line, and the fourth end cell (33.4) and the fifth end cell (33.5) is bent at the contact point and wraps the delay wire (3), and the other end of the second medical seal is bent at the contact point of the first end cell (33.1) and the ninth end cell (33.9), and the eighth end cell (33.8) And crossing the ninth end cell 33.9 in a straight line, curved at the contact point of the seventh end cell 33.7 and the eighth end cell 33.8 to cross the seventh end cell 33.7 in a straight line, and the sixth end It is characterized in that it is curved at the contact point of the cell 33.6 and the seventh end cell 33.7 to surround the delay wire 3.

In addition, according to an embodiment of the present invention, in the second knot forming step, after each of both ends of the second medical thread wraps the delay wire 3, it crosses the end cell 30 again along each trace. , Characterized in that it is pulled out and bound to the passing tube (2).

On the other hand, the number of end cells is given for illustration, it goes without saying that the present invention is not limited by this number.

In addition, the contact points of the end cells are given for illustrative purposes, and it goes without saying that the present invention is not limited thereby.

According to the present invention, it is possible to prevent blood vessel friction caused by the ends of the stent end cells.

In addition, according to the present invention, it can be effectively reduced without minimizing the volume of the end of the stent. Accordingly, it is possible to accurately install the stent at the lesion site by minimizing resistance due to blood flow in the blood vessel.

In addition, according to the present invention, by releasing the delay wire passing through the first knot and the second knot, it is possible to easily expand the stent fastened to the passing tube.

In addition, according to the present invention, the first knot and the second knot are untangled without being entangled, so that the stent fastened to the passing tube can be easily expanded, and the volume of the end of the stent can be easily reduced.

The following drawings attached to the present specification illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention together with the detailed description of the present invention, so the present invention is limited to the matters described in such drawings. And should not be interpreted.
1 is an embodiment of the stent according to the present invention, showing the appearance of the stent.
2 shows a state before the stent is fastened to the passing tube by a first knot.
3 shows a state before a stent having 7 end cells is fastened to the passing tube by a second knot.
4 shows a state before a stent having 8 end cells is fastened to the passing tube by a second knot.
5 shows a state before a stent having 9 end cells is fastened to the passing tube by a second knot.
6 is an enlarged view of FIG. 5.
7 and 8 illustrate a stent fastened to the passing tube by a first knot and a second knot.

Hereinafter, preferred embodiments of the present invention in which the object of the present invention can be realized in detail will be described with reference to the accompanying drawings. However, the accompanying drawings are only described in order to more easily disclose the contents of the present invention, but the scope of the present invention is not limited to the scope of the accompanying drawings, and those of ordinary skill in the art can easily You will know.

Referring to Figures 1 and 5, the stent delivery system and stent knot method according to an embodiment of the present invention includes a stent (1) and a passing tube (2) guiding a guide wire and a delay wire (3). It includes a stent insertion device.

On the other hand, each of one end and the other end of the delay wire 3 can be fastened to one end and the other end of the side of the passing tube 2, and when the delay wire 3 is pulled, the delay wire 3 is removed from the passing tube 2 It is released.

In addition, in general, the stent (1) has a hollow tubular shape, and one or more strands of shape memory alloy wires cross each other so that a plurality of cells 20, an end cell 30 and an end of the end cell are intersected on the surface. Form 40. Preferably, the stent 1 is covered on one side of the outer circumferential surface by a cover portion.

In addition, since the stent 1 is made of a shape memory alloy and expands to its original shape by its own elasticity in the blood vessel as soon as it exits the stent insertion device, the first knot 210 and the second knot ( 220) to the passing tube (2), so that it remains in a reduced state before being installed in the lesion site.

On the other hand, the first knot 210 of the stent delivery system passes through the end cell 30 in a zigzag manner while sandwiching the end 40 of the end cell 30 of the stent.

Specifically, as shown in Fig. 2, for example, when the stent consists of nine end cells, that is, the first end cells to the ninth end cells (33.1 to 33.9), it is made by tying both ends of the first medical thread. Pass one end of the ring through the first end cell, and zigzag the inner and outer sides of each end cell (33.2 to 33.5) while inserting the ends 40 of the second to fifth end cells (33.2 to 33.5) in a clockwise direction. Pass through, and the other end of the ring passes through the first end cell (33.1), and after the end 40 of the sixth to ninth end cells (33.6 to 33.9) in a counterclockwise direction, each end cell (33.9) is fitted. ~ 33.6) through the inside and outside in zigzag. Then, pass the passing tube 2 to which one end of the delay wire 3 is fastened to the stent 1, and pass through the one end side of the ring and the sixth end cell 33.6 passing through the fifth end cell 33.5. The other end of the delay wire 3 is passed through the other end of one ring. Preferably, the other end of the delay wire 3 is also fastened to the other end of the passing tube 2 so that the ring does not fall out along the delay wire 3.

After that, pulling one thread of the ring passing through the first end cell (33.1) causes the end (40) of each end cell (33.1 to 33.9) to be closed toward the passing tube (2), and pulled in that state. When the thread is cut and tied to the passing tube 2, the first knot 210 is formed.

Due to this, as shown in Fig. 2, the end 40 of the end cell is fastened to the passing tube 2, so that each end cell 33.1 to 33.9 is bent. Therefore, the volume of the stent tip is reduced, and when the stent 1 is moved from the blood vessel to the lesion site by the stent insertion device, it is possible to prevent vascular friction by the ends 40 of each end cell (33.1 to 33.9). I can.

In addition, since the delay wire 3 is passing through the first knot 210, when the delay wire 3 is released from the passing tube 2, the first knot 210 surrounding the delay wire 3 is It is released, and the end 40 of the end cell 30 fastened to the passing tube 2 by the first knot 210 is expanded.

On the other hand, the second knot 220 of the stent delivery system crosses the end cell 30.

Specifically, as shown in Figs. 3 to 5, the second knot 220 is, after each of both ends of the second medical thread tied to the passing tube 2 crosses the end cell 30, the delay wire 3 After passing between the and the passing tube 2 to wrap the delay wire 3, it is formed by pulling both ends of the second medical thread and binding to the passing tube 2.

Accordingly, the end cell 30 that the second knot 220 crosses is bent toward the passing tube 2, and the volume of the stent tip is reduced once more.

That is, since the end cell 30 bent by the first knot 210 can be bent once more, the volume of the stent tip can be effectively reduced.

In addition, when the second medical thread of the second knot 220 surrounds the delay wire 3 and the delay wire 3 is released from the passing tube 2, the second knot wrapped around the delay wire 3 220 is released, and the end cell 30 bent by the second knot 220 is expanded.

Preferably, the second knot 220 has a plurality of straight portions and curved portions, and the curved portions are formed in the delay wire 3 and a part of the contact point between the end cells 30 and 30.

Accordingly, the contact point of the end cell 30 in which the curved portion is formed is fastened to the passing tube 2 so that the end cell 30 is bent, and the volume of the tip end of the stent can be effectively reduced. In addition, since the curved portion is not formed at the contact point 30 of all the end cells, but is formed at a part of the end cell contact point 30, the volume of the end of the stent is not minimized.

Accordingly, it is possible to accurately install the stent at the lesion site by minimizing the resistance caused by the blood flow in the blood vessel.

On the other hand, in the present invention, the second knot 220 may be configured in various forms according to the number of end cells 30, as shown in FIGS. 2 to 4 attached thereto.

First, as shown in FIG. 3, the stent delivery system and stent knot method according to an embodiment of the present invention include a stent having 7 end cells, and the end cells 30 are first to first in a clockwise direction. It consists of 7 end cells (31.1, 31.2, 31.3, 31.4, 31.5, 31.6, 31.7).

Specifically, one end side of the second medical seal crosses from the passing tube 2 in the contact direction of the first end cell 31.1 and the second end cell 31.2, and the first end cell 31.1 and the second end It is curved while surrounding the contact point of the cell 31.2, then crosses the second end cell 31.2 and the third end cell 31.3 in a straight line, and the third end cell 31.3 and the fourth end cell 31.4 It is curved while surrounding the contact point of, and after crossing in the direction of the delay wire 3, the delay wire 3 is wrapped.

In addition, the other end side of the second medical seal crosses from the passing tube in the contact direction of the first end cell 31.1 and the seventh end cell 31.7, and between the first end cell 31.1 and the seventh end cell 31.7. It is curved while surrounding the contact point. Subsequently, the sixth and seventh end cells 31.6 and 31.7 are crossed in a straight line, curved while surrounding the contact point of the fifth end cell 31.5 and the sixth end cell 31.6, and traversed in the direction of the delay wire, Wrap the delay wire (3).

That is, the curved portion is the contact point of the first end cell 31.1 and the second end cell 31.2, the contact point of the third end cell 31.3 and the fourth end cell 31.4, the fifth end cell 31.5 and the sixth It is formed in the contact point of the end cell 31.6, the contact point of the 7th end cell 31.7 and the 1st end cell 31.1, and the delay wire 3.

In addition, as shown in Figure 4, the stent delivery system and stent knot method according to another embodiment of the present invention includes a stent having 8 end cells, and the end cells 30 are clockwise from first to It consists of an eighth end cell (32.1, 32.2, 32.3, 32.4, 32.5, 32.6, 32.7, 32.8).

Specifically, one end side of the second medical seal crosses from the passing tube 2 in the contact direction of the first end cell 321 and the second end cell 332. It is curved while surrounding the contact point of the cell 332. Then, it crosses the second end cell 32.2 and the third end cell 323 in a straight line, and the third end cell 32.3 and the fourth end cell 3244 It is curved while surrounding the contact point of, and then crosses the fourth end cell 3244 in a straight line, and is curved while surrounding the contact point of the fourth end cell 3244 and the fifth end cell 32.5, and the delay wire 3 ) And wrap the delay wire (3).

Further, the other end side of the second medical seal crosses from the passing tube 2 in the contact direction of the first end cell 332.1 and the eighth end cell 32.8, and the first end cell 32.1 and the eighth end cell ( 32.8) is curved while surrounding the contact point, and then straightly traverses the seventh end cell 32.7 and the eighth end cell 32.8, and the contact point of the seventh end cell 32.7 and the sixth end cell 32.6 Is bent while wrapping, and then crossing the sixth end cell (32.6) in a straight line, and bent while wrapping the contact point between the fifth end cell (32.5) and the sixth end cell (32.6), and the direction of the delay wire (3) After crossing with, wrap the delay wire (3).

That is, the curved portion is the contact point of the first end cell 321 and the second end cell 32.2, the contact point of the third end cell 32.3 and the fourth end cell 3244, the fourth end cell 3244 and the fifth end cell 332. The contact point of the end cell 32.5, the contact point of the fifth end cell 32.5 and the sixth end cell 32.6, the contact point of the sixth end cell 32.6 and the seventh end cell 32.7, the eighth end cell 32.8 ) And the contact point of the first end cell 321 and the delay wire 3.

In addition, as shown in FIG. 5, the stent knotting method of another embodiment of the present invention includes a stent having 9 end cells, and the end cells 30 are first to ninth end cells in a clockwise direction. (33.1, 33.2, 33.3, 33.4, 33.5, 33.6, 33.7, 33.8, 33.9).

Specifically, one end side of the second medical seal crosses from the passing tube 2 in the contact direction of the first end cell 33.1 and the second end cell 33.2, and the first end cell 33.1 and the second end It is curved while surrounding the contact point of the cell 33.2, then crosses the second end cell 33.2 and the third end cell 33.3 in a straight line, and between the third end cell 33.3 and the fourth end cell 33.4 It is curved while surrounding the contact point and crosses the fourth end cell (33.4) in a straight line, and is curved while surrounding the contact point of the fourth end cell (33.4) and the fifth end cell (33.5), and crosses in the direction of the delay wire (3). After, wrap the delay wire (3).

Further, the other end side of the second medical seal crosses from the passing tube 2 in the contact direction of the first end cell 33.1 and the ninth end cell 33.9, and the first end cell 33.1 and the ninth end cell ( 33.9) is curved while surrounding the contact point, then crosses the eighth end cell (33.8) and the ninth end cell (33.9) in a straight line, and the contact point of the seventh end cell (33.7) and the eighth end cell (33.8) It is curved while wrapping and crossing the seventh end cell (33.7) in a straight line, and is curved while wrapping around the contact point between the sixth end cell (33.6) and the seventh end cell (33.7) and crosses in the direction of the delay wire (3). Wrap the wire (3).

That is, the curved portion is the contact point of the first end cell 33.1 and the second end cell 33.2, the contact point of the third end cell 33.3 and the fourth end cell 33.4, the fourth end cell 33.4 and the fifth The contact point of the end cell 33.5, the contact point of the sixth end cell 33.6 and the seventh end cell 33.7, the contact point of the seventh end cell 33.7 and the eighth end cell 33.8, the ninth end cell 33.9 ) And the contact of the first end cell 33.1 and the delay wire 3.

In the above-described embodiments, when one end side and the other end side of the second medical seal are pulled, as shown in FIGS. 7 and 8, the contact point of the end cell in which the curved portion is formed is closed toward the passing tube 2, As the end cell is bent, the volume of the tip of the stent is reduced to about 30 to 40% of the original volume, so that the blood flows appropriately outside and inside the artificial blood vessel material of the stent, and the stent is minimized by the resistance of the blood flow in the blood vessel. It can be installed accurately on the lesion site.

In addition, more preferably, the second knot 220 is, after each of the both ends of the second medical thread tied to the passing tube 2 wraps the delay wire 3, the end cells 30 along each trace. After crossing again, it is pulled out and tied to the passing tube 2 to form.

That is, since the medical thread is bound to the passing tube 2 after crossing the end cell 30 along its trail, the second knot 220 is not entangled when the delay wire 3 is dismantled from the passing tube 2. It is not released. In addition, since two curved portions are formed at each contact point, when both ends of the second medical thread are pulled, the end cells 30 can be more easily bent. Preferably, the second knot 220 is symmetrical about the first end cell.

On the other hand, the number of end cells is given for illustration, it goes without saying that the present invention is not limited by this number.

In addition, the contact points of the end cells are given for illustrative purposes, and it goes without saying that the present invention is not limited thereby.

1: stent
2: passing tube
3: delay wire
20: cell
30, 31.1 ~ 31. 7, 32.1 ~ 32.8, 33.1 ~ 33.9: end cell
40: end
210: first knot
220: second knot

Claims (12)

In a stent delivery system for installing a stent (1) in a blood vessel through a stent insertion device,
The stent 1 forms a plurality of cells 20 by weaving wires together, and has a hollow cylindrical shape,
The cell 20 includes an end cell 30 formed at the end of the stent 1,
The stent insertion device includes a passing tube (2) for guiding a guide wire,
The stent (1) is fastened to the passing tube (2) by a knot,
The knot is,
A first knot 210 passing through the end cell 30 in a zigzag while inserting the end 40 of the end cell 30; And
A second knot 220 across the end cell 30; Including,
The stent insertion device comprises a delay wire (3) coupled to the passing tube (2),
The delay wire (3), characterized in that passing through the first knot (210) and the second knot (220), stent delivery system. delete The method of claim 1,
The second knot 220 has a plurality of straight portions and curved portions,
The stent delivery system, characterized in that the curved portion is formed in a part of the contact point of the end cell and in the delay wire (3). The method of claim 3,
The end cells 30 are composed of first to seventh end cells 31.1, 31.2, 31.3, 31.4, 31.5, 31.6, 31.7 in a clockwise direction,
The contact point of the end cell on which the curved portion is formed,
A contact point of the first end cell (31.1) and the second end cell (31.2); And
A contact point of the third end cell (31.3) and the fourth end cell (31.4); And
A contact point of the fifth end cell (31.5) and the sixth end cell (31.6); And
A contact point of the seventh end cell (31.7) and the first end cell (31.1);
A stent delivery system characterized in that it is. The method of claim 3,
The end cells 30 are composed of first to eighth end cells (32.1, 32.2, 32.3, 32.4, 32.5, 32.6, 32.7, 32.8) in a clockwise direction,
The contact point of the end cell in which the curved portion is formed,
A contact point of the first end cell (32.1) and the second end cell (32.2); And
A contact point of the third end cell (32.3) and the fourth end cell (32.4); And
A contact point of the fourth end cell (32.4) and the fifth end cell (32.5); And
A contact point of the fifth end cell (32.5) and the sixth end cell (32.6); And
A contact point of the sixth end cell (32.6) and the seventh end cell (32.7); And
A contact point of the eighth end cell (32.8) and the first end cell (32.1);
A stent delivery system characterized in that it is. The method of claim 3,
The end cells 30 are composed of first to ninth end cells (33.1, 33.2, 33.3, 33.4, 33.5, 33.6, 33.7, 33.8, 33.9) in a clockwise direction,
The contact point of the end cell in which the curved portion is formed,
A contact point of the first end cell (33.1) and the second end cell (33.2); And
A contact point of the third end cell (33.3) and the fourth end cell (33.4); And
A contact point of the fourth end cell (33.4) and the fifth end cell (33.5); And
A contact point of the sixth end cell (33.6) and the seventh end cell (33.7); And
A contact point of the seventh end cell (33.7) and the eighth end cell (33.8); And
A contact point of the ninth end cell (33.9) and the first end cell (33.1);
A stent delivery system characterized in that it is. The method according to any one of claims 4 to 6,
The second knot (220) is symmetrical about the first end cell, the stent delivery system, characterized in that there are two each of the curved portions. As a stent knot method for fastening the stent (1) to the stent insertion device,
The stent 1 forms a plurality of cells 20 by weaving wires together, and has a hollow cylindrical shape,
The cell 20 includes an end cell 30 formed at the end of the stent,
The stent insertion device includes a passing tube (2) for guiding a guide wire and a delay wire (3) coupled to the passing tube,
A ring made of a first medical thread fits the end 40 of the end cell 30 and passes through the end cell 30 in a zigzag manner, passes the delay wire 3 through both ends of the ring, and passes the ring. Forming a first knot which is pulled and tied to the passing tube (2); And
The passing tube (2) is wrapped around the delay wire (3) after both ends of the second medical thread tied to the passing tube (2) cross the end cell (30), and pulls both ends of the second medical thread (2). Forming a second knot tying to the end;
The stent knot method comprising a. The method of claim 8,
The end cells 30 are composed of first to seventh end cells 31.1, 31.2, 31.3, 31.4, 31.5, 31.6, 31.7 in a clockwise direction,
In the second knot forming step,
One end side of the second medical seal is curved at the contact point between the first end cell 31.1 and the second end cell 31.2 to make the second end cell 31.2 and the third end cell 31.3 a straight line. Traverse and bent at the contact point of the third end cell 31.3 and the fourth end cell 31.4 to surround the delay wire 3,
The other end side of the second medical seal is curved at the contact point between the first end cell 31.1 and the seventh end cell 31.7 to make the sixth end cell 31.6 and the seventh end cell 31.7 a straight line. A stent knotting method, characterized in that it crosses and is curved at a contact point between the fifth end cell (31.5) and the sixth end cell (31.6) to wrap the delay wire (3). The method of claim 8,
The end cells 30 are composed of first to eighth end cells (32.1, 32.2, 32.3, 32.4, 32.5, 32.6, 32.7, 32.8) in a clockwise direction,
In the second knot forming step,
One end side of the second medical seal is curved at the contact point between the first end cell (32.1) and the second end cell (32.2) to straighten the second end cell (32.2) and the third end cell (32.3). Transverse, curved at the contact point of the third end cell (32.3) and the fourth end cell (32.4) to cross the fourth end cell (32.4) in a straight line, and the fourth end cell (32.4) and the fourth end cell (32.4) 5 bent at the contact point of the end cell 32.5 to wrap the delay wire 3,
The other end side of the second medical seal is curved at the contact point between the first end cell (32.1) and the eighth end cell (32.8) to make the seventh end cell (32.7) and the eighth end cell (32.8) in a straight line. Transverse, curved at the contact point of the seventh end cell (32.7) and the sixth end cell (32.6) to cross the sixth end cell (32.6) in a straight line, and the fifth end cell (32.5) and the fifth end cell (32.5) 6, characterized in that curved at the contact point of the end cell (32.6) to surround the delay wire (3), stent knot method. The method of claim 8,
The end cells 30 are composed of first to ninth end cells (33.1, 33.2, 33.3, 33.4, 33.5, 33.6, 33.7, 33.8, 33.9) in a clockwise direction,
In the second knot forming step,
One end side of the second medical seal is bent at the contact point between the first end cell 33.1 and the second end cell 33.2 to straighten the second end cell 33.2 and the third end cell 33.3. Transverse and curved at the contact point of the third end cell (33.3) and the fourth end cell (33.4) to cross the fourth end cell (33.4) in a straight line, and the fourth end cell (33.4) and the fourth end cell (33.4) 5 bent at the contact point of the end cell (33.5) to wrap the delay wire (3),
The other end side of the second medical seal is curved at the contact point between the first end cell 33.1 and the ninth end cell 33.9 and crosses the eighth end cell 33.8 and the ninth end cell 33.9 in a straight line, and , Curved at the contact point of the seventh end cell (33.7) and the eighth end cell (33.8) to cross the seventh end cell (33.7) in a straight line, and the sixth end cell (33.6) and the seventh end It is curved at the contact point of the cell (33.7), characterized in that surrounding the delay wire (3), the stent knot method. The method according to any one of claims 9 to 11,
The second knot forming step,
Each of both ends of the second medical thread wraps the delay wire (3), and after crossing the end cell (30) again along each trace, it is pulled and bound to the passing tube (2). , Stent knot method.

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