WO2013141441A1

WO2013141441A1 - Flexible stent

Info

Publication number: WO2013141441A1
Application number: PCT/KR2012/003467
Authority: WO
Inventors: 김철수; 이석재
Original assignee: 주식회사 엠아이텍
Priority date: 2012-03-19
Filing date: 2012-05-03
Publication date: 2013-09-26
Also published as: KR20130106115A; KR101320480B1

Abstract

The present invention relates to a flexible stent. The flexible stent comprises: a first hollow unit having a plurality of peaks and valleys formed by winding a first wire in a zigzag manner along a plurality of fixing pins arranged in a cylindrical stent manufacturing jig, the first hollow unit forming a cylindrical structure; and a second hollow unit formed by winding a second wire along the fixing pins from among the plurality of fixing pins not wound by the first wire, the second wire intersecting the first wire and forming a separate cylindrical structure along an outer circumferential surface of the first hollow unit. The present invention provides stent technology in which a plurality of peaks and valleys that constitute the first hollow unit are interposed between the plurality of peaks and valleys constituting the second hollow unit in such a manner that the first wire constituting the first hollow unit is prevented from protruding from the second hollow unit in the event that the shape of the first hollow unit is deformed. Therefore, the stent of the present invention may maintain a curved state to fit the shape of the curved body part undergoing surgery and may provide convenience in carrying out a surgical procedure.

Description

Flexible stent

The present invention relates to a flexible stent.

In general, the stent is a luminal dilation apparatus used to expand a narrowed passage due to stenosis, and is widely used for the treatment of cancer diseases or vascular diseases. The stent in the patient's body forms a strong frictional force with blood vessels or conduits in the constricted body so as not to be released from the initial installation position by external force or pressure acting in the body.

On the other hand, as a method for maintaining the diameter and installation state of the stent in close contact with the lesion for a long time, a stent structure has been developed in which a spiral strut is formed by continuously twisting an extra wire to a part of the wire constituting the stent body. It became.

However, the above-described stent structure is characterized by the fact that the elastic force is increased in the radial direction from the center of the stent so that the stent is kept in a straight state because a separate post is wound around the wire constituting the stent body to form a spiral strut. .

In other words, when the stent is inserted into a curved digestive organ such as the large intestine or duodenum, the stent is temporarily deformed due to the bending of the digestive organ, but the force to restore the original form by the axial force is reduced. Due to the action of the wire, both ends of the stent penetrated the lesion tissue and had the disadvantage of leaving the initial insertion position.

The disadvantage of stents with stents was that there was a risk of causing perforation depending on the surgical site as the stents penetrated the curved digestive organs in the process of restoring to a straight state. In addition, when the stent is formed in the stent is curved, such as the colon or duodenum, the metal fatigue of the wire due to the axial force increases as the stent is deformed, shortening the life of the wire.

On the other hand, in addition to the stent stent is formed a lot of development has been made for a new stent structure that can maintain the original shape of the surgical site. However, in most of the stents under development, the peaks and valleys of the stent wires cross each other, and as the wire banding structure is formed along the circumference of the circumferential surface of the stent body, the stent wires are interwoven with each other. The tendency to maintain its initial diameter was strong.

Therefore, in the existing stent structure in which the wire banding structure is formed in the horizontal direction, the diameter of the stent is not deformed well by external pressure, so that the process of compressing the stent into the stent insertion device is difficult to perform the stent at the stenosis of the body. In order to position the stent in the site, more force than necessary is to be applied in the process of releasing the stent from the stent insertion apparatus again, thereby lowering the efficiency of the procedure and inconvenient to perform the procedure.

The present invention is to solve the above-described problems, and to provide a stent technology that maintains the curved state further to suit the shape of the curved surgical site, and the procedure is convenient.

In order to achieve this object, in one aspect of the present invention, the flexible stent includes a plurality of peaks and valleys wound around the first wire by zigzag along a plurality of fixing pins provided in a jig for manufacturing a cylindrical stent, and having a cylindrical structure. A first hollow portion forming a; And a second wire wound in a zigzag form along a fixing pin, to which the first wire is not wound, of the plurality of fixing pins to cross the first wire, and to form a separate cylindrical structure on an outer circumferential surface of the first hollow part. Hollow part; When the shape of the first hollow portion is deformed, the peak portion and the valley portion constituting the first hollow portion so that the first wire constituting the first hollow portion does not protrude out of the second hollow portion It is located between a plurality of peaks and valleys constituting the second hollow portion.

The first wire and the second wire form peaks or valleys at both ends of the first hollow portion and the second hollow portion, respectively, and the second wire is formed between a plurality of peaks or valley portions formed by the first wire. Is characterized in that to form a separate peak or valley portion.

The plurality of peaks and valleys constituting the first hollow portion are arranged to be in a straight line in the longitudinal direction of the first hollow portion, and the first wire crosses both sides of the peak portion and the valley portion arranged in a straight line in the vertical direction. And has a mesh structure.

The first hollow portion may include: a first portion starting from any fixed pin provided in the jig and rotating along the circumferential surface of the jig to form a plurality of rows; And a second part starting from the fixing pin where the formation of the first part is completed, rotating along the circumferential surface of the jig, and forming a plurality of rows to cross the first part; The second hollow portion includes a third portion which rotates along the circumferential surface of the jig starting from another fixing pin located on the same horizontal line as the first fixing pin at which the first portion starts and forms a plurality of rows. ; And a fourth part starting from the fixing pin where the formation of the third part is completed, rotating along the circumferential surface of the jig, and forming a plurality of rows to cross the third part. Characterized in that it comprises a.

The first portion moves zigzag along the circumferential surface of the jig from the first fixing pin from which the first portion starts and forms a plurality of peaks and valleys, the plurality of which are located on the same horizontal line as the first fixing pin. Row 1-1 passing through the fixing pins to form a plurality of peaks; Moving from the fixing pins in which the formation of the first-first row is completed to the zigzag along the circumferential surface of the jig, and bent through another plurality of the fixing pins located on the same horizontal line as the peak portion of the first-first row First to second columns forming a plurality of peaks and valleys; A plurality of peaks are formed by moving from the fixing pins in which the formation of the first to second columns is completed to the zigzag along the circumferential surface of the jig, wherein any one of the formed peaks is one of the valleys formed in the first to second columns. Rows 1 to 3 intersecting and intertwining with any one; A plurality of peaks are formed in the zigzag along the circumferential surface of the jig from the fixing pins in which the formation of the first to third rows is completed, and the plurality of peaks are formed in the first-first row and the first-second row. Rows 1 to 4 intersecting and interlacing with any one of the plurality of valley portions; A plurality of peaks are formed by moving from the fixing pins in which the formation of the first to fourth rows is completed to the zigzag along the circumferential surface of the jig, wherein any one of the plurality of peaks is formed in the first to first columns. Columns 1-5 intersected with and intertwined with any of the parts; And first to sixth rows spaced apart from the first to fifth rows at regular intervals from the point at which the first to fifth rows are terminated along the circumferential surface of the jig. Characterized in that it comprises a.

At least one peak portion formed on the same horizontal line as the peak portion formed in the first-first column among the plurality of peak portions formed in the first-first column, the first-second column and the first-third column, is spaced apart at regular intervals, respectively It is characterized by.

Columns 1-1, 1-2, 1-3, and 1-4 are zigzag along the circumferential surface of the jig and cross each other.

Columns 1-1, 1-2, 1-3, and 1-4 are moved in the direction of the fixing pin ending from the starting pin of each row and cross each other, and the first-first column, Columns 1-2, 1-3, and 1-3 intersect each other's columns that cross each other when moving from the valley to the peak of each column, and when moving from the peak to the valley of each column, Characterized by crossing down.

The second part sets the fixing pins at which the formation of the first part is completed as the starting point of the second part, moves zigzag along the circumferential surface of the jig, and forms a plurality of peaks and valleys, Rows 2-1 passing through a plurality of fixing pins positioned on the same horizontal line to form a plurality of valleys; A plurality of peaks and valleys are formed along the circumferential surface of the jig from the fixing pins in which the formation of the second column is completed, and a plurality of peaks and valleys are formed on the same horizontal line as the valleys of the second column. Rows 2-2 passing through a plurality of fixing pins to form a plurality of valleys; A plurality of peaks and valleys are formed by moving from the fixing pins in which the formation of the second column to the second end is completed to the zigzag along the circumferential surface of the jig, wherein the plurality of valleys are formed in the columns 2-1 and 2; Rows 2 to 3 intersecting and interlacing with any one of a plurality of peaks formed in two rows; A plurality of peaks and valleys are formed by moving from the fixing pins in which the formation of the second to third columns is completed to the zigzag along the circumferential surface of the jig, wherein any one of the valleys is formed in the second column. Rows 2-4 intersecting and interlacing with any one of the peaks; And a plurality of peaks and valleys moving along the circumferential surface of the jig from the fixing pins in which the formation of the second to fourth columns is completed, and forming a plurality of peaks and valleys, spaced apart from the second to fourth columns at regular intervals. Heat; Characterized in that it comprises a.

Columns 2-1, 2-2 and 2-3 are zigzag along the circumferential surface of the jig and cross each other.

Rows 2-1, 2-2, and 2-3 move in the direction of the fixing pins ending with the fixing pins at the beginning of each row, wherein columns 2-1, 2-2, and 2- The three columns are intersected above the other rows that cross each other when moving from the valley to the peak of each column, and cross below the other rows that cross each other when moving from the peak to the valley of each column.

The third part starts from another fixing pin located on the same horizontal line as the fixing pin from which the first part starts, and moves zigzag along the circumferential surface of the jig to form a plurality of peaks and valleys. Heat; Columns 3-2 moving from the fixing pins in which the formation of the column 3-1 is completed to the zigzag along the circumferential surface of the jig and forming a plurality of peaks and valleys; A plurality of peaks and valleys are formed at regular intervals from the fixed pins in which the formation of the third column is completed, along the circumferential surface of the jig along the circumferential surface of the jig, and at regular intervals from the peaks and valleys formed in the third column. Row 3-3; A plurality of peaks and valleys are formed at regular intervals from the fixing pins in which the formation of the third column is completed, along the circumferential surface of the jig along the circumferential surface of the jig, and at regular intervals from the peaks and valleys formed in the third column. Row 3-4; A plurality of peaks and valleys are formed by moving from the fixing pins in which the formation of the third to fourth columns is completed to the zigzag along the circumferential surface of the jig, wherein any one of the formed plurality of peaks is formed in the third to fourth rows. Rows 3 to 5 intersecting and interlacing with any one of the plurality of valley portions; And forming a plurality of peaks and valleys along the circumferential surface of the jig from the fixing pins in which the formation of the third to fifth columns is completed, and forming a plurality of peaks and valleys, wherein any one of the formed plurality of peaks is arranged in the third to fifth columns. Rows 3-6 which intersect and intersect any one of a plurality of valleys formed or a plurality of valleys formed in rows 3-4; Characterized in that it comprises a.

Rows 3-5 and 3-6 move in the direction of the fixing pins ending from the starting pins of each row and cross each other, and columns 3-5 and 3-6 are valleys at the peak of each row. When moving to the cross is crossed over the other intersected rows, when moving from the valley portion of each column to the peak portion is characterized in that it crosses under the other cross.

The fourth part sets the fixing pin where the formation of the third part is completed to the starting point of the fourth part, and moves in a zigzag along the circumferential surface of the jig to form a plurality of peaks and valleys. Heat; Columns 4-2 which move from the fixing pins in which the formation of the column 4-1 is completed to the zigzag along the circumferential surface of the jig and form a plurality of peaks and valleys; A plurality of peaks and valleys are formed at regular intervals from the fixing pins in which the formation of the second column is completed in the zigzag along the circumferential surface of the jig, and at regular intervals from the peaks and the valleys formed in the fourth column. Rows 4-3; A plurality of peaks and valleys are formed at regular intervals from the fixing pins in which the formation of the third row is completed, along the circumferential surface of the jig, and the peaks and valleys formed in the fourth row. Rows 4-4; A plurality of peaks and valleys are formed at regular intervals from the peaks and valleys formed in the fourth through fourth rows from the fixing pins in which the formation of the fourth to fourth rows is completed, and move along the circumferential surface of the jig. Rows 4-5; And forming a plurality of peaks and valleys along the circumferential surface of the jig from the fixing pins in which the formation of the fourth to fifth rows is completed, and forming a plurality of peaks and valleys, wherein any one of the plurality of valleys is formed in the fourth to fourth columns. Rows 4-6 arranged to intersect and intersect with any one of a plurality of peaks formed or a plurality of peaks formed in columns 4-5; Characterized in that it comprises a.

Rows 4-5 and 4-6 move in the direction of the fixing pins ending from the starting pins of each row, while columns 4-5 and 4-6 move from the peak to the valley of each row. Crossing over the other columns intersected with each other, and when moving from the valley portion to the peak portion of each column, it is characterized in that they cross below the other columns intersected with each other.

As described above, the present invention has the following effects.

First, the stent according to the present invention can maintain a curved shape to be suitable for the severely curved surgical site as the first wire and the second wire are woven in different ways to form a cylindrical first hollow portion and a second hollow portion, respectively. have.

Second, since the stent according to the present invention does not form a separate strut, the axial force is reduced, so that the stent inserted into the surgical site can maintain a curved form, so that the stent has a straight shape, which is the first form of the stent by the axial force. It is not restored.

Therefore, the flexible stent is suitable for insertion of curved digestive organs or blood vessels, and does not cause perforation of the surgical site by restoring the shape of the stent, so that the severe flexion of the digestive organ is not deformed and is maintained in its original form. have.

Third, since the stent according to the present invention can be modified in the form of the stent according to the shape of the curved surgical site, the metal fatigue of the wire is reduced.

Fourth, the stent according to the present invention is arranged so that the peaks and valleys of the wires constituting the stent meet each other and interweave are arranged in a straight line in the longitudinal direction of the stent, the peaks and valleys arranged in a straight line As the wire mesh structure is formed on both sides of the part, a process of compressing the stent in the stent insertion device or discharging the stent to the outside of the stent insertion device is convenient.

In other words, the wires constituting the stent overlap each other, so that all the wires act as props in the longitudinal direction of the stent, the stent treatment is easy.

Fifth, since the peak portion and the valley portion of the wire constituting the first hollow portion do not protrude to the outside by the second hollow portion, there is no damage due to the protruding portion of the stent on the surgical site.

1 illustrates a flexible stent according to an embodiment of the present invention.

2 to 8 illustrate a method of manufacturing a flexible stent according to an embodiment of the present invention.

Figure 9 shows a flexible stent in accordance with one embodiment of the present invention is compressed than the original diameter to be inserted into the stent insertion mechanism.

10 illustrates peaks and valleys formed at the ends of the flexible stent according to an embodiment of the present invention.

10: flexible stent

100 First Division

W1 first wire

110: first part

111: Column 1-1

112: column 1-2

113: Column 1-3

114: columns 1-4

115: columns 1-5

116: Columns 1-6

120: second part

121: row 2-1

122: row 2-2

123: column 2-3

124: Row 2-4

125: rows 2-5

200: Second Hollow Division

W2: 2nd wire

210: third part

211: Row 3-1

212: Row 3-2

213: Row 3-3

214: Row 3-4

215: Row 3-5

216: Columns 3-6

220: fourth part

221: column 4-1

222: column 4-2

223: column 4-3

224: columns 4-4

225: Rows 4-5

226: columns 4-6

J: Stenting Jig

P: peak portion

V: Valley

F: fixed pin

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings, and the well-known technical parts will be omitted or compressed for brevity of description.

The flexible stent 10 according to the present invention includes a first hollow portion 100 and a second hollow portion 200, which will be described with reference to FIGS. 1 to 10.

The first hollow part 100 is a cylindrical structure in which a first wire W1 is wound in a zigzag along a plurality of fixing pins F provided in a jig J for forming a stent. Here, the first wire W1 is wound around a plurality of fixing pins F provided on the surface of the jig J and constitutes a plurality of peak portions P and valley portions V. As shown in FIG.

The first hollow part 100 starts from an arbitrary fixing pin F provided in the stent fabrication jig J and rotates along the circumferential surface of the jig J to form a plurality of rows 110. ) And a second part which rotates along the circumferential surface of the jig J and forms a plurality of rows starting from the fixing pin F where the formation of the first part 110 is completed and intersects with the first part 110. 120.

2 to 8 show a development view in which the jig J for manufacturing a stent in a flat shape is unfolded, and a fixing pin F for accommodating a plurality of fixing pins F on the surface of the jig J. A plurality of dragon grooves are formed at regular intervals, and the plurality of fixing pins F are arranged to protrude in the circumferential direction of the jig J. The number and arrangement of the fixing pins F is not limited to the embodiment shown in the drawings, and various embodiments are possible depending on the shape and size of the stent to be manufactured.

2 shows columns 1-1, 111, 1-2, 112, 1-3, 113, 1-4, 114, 1-5, 115, and 1st. The process of manufacturing the first portion 110 including -6 columns 116 is shown. First, the first-first column 111 moves along the circumferential surface of the jig J, starting from the point X1Y1, which is the first fixing pin F at which the first portion 110 starts, but X5Y5, X9Y1, and X10Y2. Passing through the points located at X11Y1, X14Y4, X17Y1, and X1Y3, a plurality of peaks P and valleys V are formed, and are terminated at the point X1Y3.

At this time, the first wire W1 is bent while passing through a plurality of fixing pins F positioned on the same horizontal line as the X1Y1 point, which is the first fixing pin F, at which the first-first column 111 starts. The peak portion P is formed. That is, in the first-first column 111, the peak portions P are formed at the points X9Y1, X11Y1, and X17Y1, respectively.

The first-second row 112 starts at the X1Y3 point, which is the pin (F) where the formation of the first-first row 111 is completed, and moves zigzag along the circumferential surface of the jig J, but X1Y3 and X3Y1. , Passing through the points located at X5Y3, X7Y1, X10Y4, X13Y1, X14Y2, and X15Y1, forms a plurality of peaks P and valleys V, and ends at the point X1Y5. The first-second column 112 forms the peak portion P at the points X3Y1, X7Y1, X13Y1, and X15Y1 positioned on the same horizontal line as the peak portion P formed in the first-first column 111.

Columns 1-3 113 start at the X1Y5 point, which is the fixed pin F, in which the formation of the 1st-2nd column 112 is completed, and move to the zigzag along the circumferential surface of the jig J, and the X5Y1 and X14Y2 points. Respectively form two peaks P, ending at X1Y7. Here, the first-third row 113 is interwoven with the valley portion V of the first-second row 112 at the X14Y2 point and is interwoven to form a coupling between the two rows.

The first to fourth columns 114 start at the X1Y7 point, which is the fixed pin F, in which the formation of the first to third columns 113 is completed, and move to the zigzag along the circumferential surface of the jig J and the X5Y3 and X14Y4 points. Respectively form two peaks P, ending at X1Y9. Rows 1-4 114 intersect and intersect with the valleys V of rows 1-2 at 112 at X5Y3, and valleys V of columns 1-1-1 1 1 at row X14Y4. By interweaving, they are combined with the first-first row 111 and the first-second row 112.

The first to fifth columns 115 start at the X1Y9 point, which is the fixed pin F, at which the formation of the first to fourth columns 114 is completed, and move to the zigzag along the circumferential surface of the jig J and the X5Y5 and X14Y6 points. Respectively form two peaks P, ending at X1Y11. The first to fifth columns 115 are coupled to the first to first columns 111 by crossing and interweaving with the valley portions V of the first to first columns 111 at the X5Y5 point.

The first to sixth columns 116 start at the X1Y11 point, which is the fixed pin F, in which the formation of the first to fifth columns 115 is completed, and move to the zigzag along the circumferential surface of the jig J and the X5Y7 and X14Y8 points. Respectively form two peaks P, ending at X18Y12. In this case, the first to sixth columns 116 are spaced apart from the first to fifth columns 115 at regular intervals, and in an embodiment of the present invention, the first to sixth columns 116 are the first to fifth columns 115. Spaced apart by a vertical distance between the starting point of the and the starting point of the first to sixth columns 116.

On the other hand, the peak portion formed in the first-first column 111 of the plurality of peaks P formed in the first-first column 111, the first-second column 112, and the first-third column 113. One or more peak portions P formed on the same horizontal line as (P) are arranged to be spaced apart at regular intervals, respectively, to form an outer circumferential surface of one end of the first hollow portion 100. That is, the peak portion P formed at the X9Y1, X11Y1, and X17Y1 points of the first-first column 111 among the plurality of peaks P formed in the first-second column 112 and the first-third column 113. The peak portion P formed on the same horizontal line as) is positioned at the points X3Y1, X5Y1, X7Y1, X13Y1, and X15Y1, and the peak portion P is disposed at regular intervals from the peak portion P adjacent to the left and right sides. .

The first-first column 111, the first-second row 112, the first-third row 113, and the first-fourth row 114 move in a zigzag along the circumferential surface of the jig J Intersect at In other words, columns 1-1, 111, 1-2, 112, 1-3, 113, and 1-4 are 114 from the starting pin (F) point of each row. Moving in the direction of the fixing pin (F) point to be terminated to cross each other, column 1-1, 111, 1-2, 112, 1-3, 113 and 1-4 114 crosses each other when crossing from the valley portion (V) of each column to the peak portion (P), and crosses each other when moving from the peak portion (P) of each column to the valley portion (V). Crossed down.

For example, when the first-first column 111 moves from the valley portion V at the X5Y5 point to the peak portion P at the X9Y1 point, the first-first column 111 is the first-second column ( 112), the first to third columns 113 and the first to fourth columns 114 intersect with each other, and the first-first column 111 is the valley portion V of the X14Y4 at the peak portion P at the X11Y1 point. When moving to, the first-first column 111 intersects the first-second column 112 and the first-third column 113.

Figure 3 includes columns 2-1, 121, 2-2, 122, 2-3, 123, 2-4, 124, and 2-5, 125. It shows a process in which the second portion 120 is manufactured. First, column 2-1 121 starts at the point X18Y12, which is the fixed pin F, in which the formation of the first portion 110 is completed, and moves zigzag along the circumferential surface of the jig J, but X1Y11 and X2Y12. , Passing through the points located at X5Y9, X8Y12, X10Y10, X12Y12, X14Y10, X16Y12, forms a plurality of peaks P and valleys V, and ends at the X1Y9 point.

In this case, the first wire W1 is bent while passing through a plurality of fixing pins F positioned on the same horizontal line as the X18Y12 point, which is the first fixing pin F at which the second-first row 121 starts. The valley portion V is formed. That is, in the second-first column 121, valley portions V are formed at X2Y12, X8Y12, X12Y12, and X16Y12 points, respectively.

The 2nd-2nd column 122 starts at the X1Y9 point which is the fixed pin F by which the formation of the 2-1st-throw 121 is complete | finished, and moves to zigzag along the circumferential surface of the jig | J, J4Y12, X5Y11 Passing through the points located at X6Y12, X10Y8, X14Y12, and X1Y7, a plurality of peaks P and valleys V are formed, and are terminated at the X1Y7 point. The second-second row 122 forms the valley portion V at points X4Y12, X6Y12, and X14Y12 positioned on the same horizontal line as the valley portion V formed in the second-first column 121, respectively.

The second to third columns 123 start at the X1Y7 point, which is the fixed pin F, in which the formation of the first to second row 112 ends, and move to the zigzag along the circumferential surface of the jig J, and the X5Y11 and X14Y10 points. Respectively form two valleys (V), ending at X1Y5. Here, the second-third column 123 is combined with the second-second row 122 by interlacing with the peak portion P of the second-second row 122 at the X5Y11 point, and the second-second row at the X14Y10 point. It is coupled with the 2-1st column 121 by intersecting and interweaving with the peak portion P of the −1 column 121.

Columns 2-4 are zigzag along the circumferential surface of jig J starting at the X1Y5 point, which is the fixed pin F, in which the formation of the second-3rd column 123 is completed, and at the X10Y4 point. Two peak portions P are formed, two valley portions V are formed at the X5Y9 and X14Y8 points, respectively, and are terminated at the X1Y3 point. The second-4 columns 124 intersect with the peak portions P of the second-first columns 121 at the X5Y9 point and are intertwined to form a bond between the two rows.

The 2-5th column 125 starts from the X1Y3 point which is the fixed pin F by which the formation of the 2-4th column 124 was completed, and moves to zigzag along the circumferential surface of the jig J, X5Y7 and X14Y6 Two valley portions V are formed at the point, one peak portion P is formed at the X10Y2 point, and ends at the X1Y1 point. In this case, the second to fifth columns 125 are spaced apart from the second to fourth columns 124 at regular intervals, and in the embodiment of the present invention, the second to fifth columns 125 are the second to fourth columns 124. Spaced apart by a vertical distance between the starting point of the and the starting point of the second column 5-5.

A valley portion V formed in the second-first column 121 among the plurality of valley portions V formed in the second-first row 121, the second-second row 122, and the second-third column 123. At least one valley portion (V) formed on the same horizontal line with) is arranged at regular intervals along with the valley portions (V) of the first to sixth columns 116, so that the outer peripheral surface of the other end of the first hollow portion 100 is Will form.

That is, valley portions formed at X2Y12, X8Y12, X12Y12, and X16Y12 points of the second-first column 121 among the plurality of valleys V formed in the second-second row 122 and the second-third column 123. A valley V formed on the same horizontal line as V is located at X4Y12, X6Y12, and X14Y12, and the valley V is a valley V formed at the X10Y12 point of the first to sixth columns 116. Spaced at regular intervals.

The second-first row 121, the second-second row 122, and the second-third row 123 cross each other in the process of moving in a zigzag along the circumferential surface of the jig J. Columns 2-1, 121, 2-2, 122, and 2-3, 123 move in the direction of the fixing pin (F) point ending from the fixing pin (F) point at the beginning of each column. Intersections are made, but columns 2-1, 121, 2-2, 122, and 2-3 are reciprocated when moving from the valley portion V to the peak portion P of each column. They cross over the other rows that intersect and cross below the other rows that cross each other when moving from the peak portion P to the valley portion V in each row.

For example, when the second-first column 121 moves from the valley portion V of the X2Y12 point to the peak portion P of the X5Y9 point, the second-first column 121 is the second-second column ( 122) and the second to third columns 123, and when the second to first columns 121 are moved from the peak portion P at the X5Y9 point to the valley portion V at the X8Y12 point, The first column 121 crosses below the second-second column 122 and the second-third column 123.

4 illustrates a state in which formation of the first portion 110 and the second portion 120 is completed. As shown in FIG. 4, the first wire W1 starts from the X1Y1 point and ends at the X18Y12 point to form the first part 110, and then starts from the X18Y12 point and goes up to the X1Y1 point to the second part 120. ) To form the first hollow portion 100.

In this case, since the second part 120 is in contact with the first part 110 at the X1Y1 point, it is preferable to join the first part 110 and the second part 120 using laser welding.

As shown in FIG. 4, the plurality of peaks P and valleys V constituting the first hollow portion 100 are arranged to form a straight line in the longitudinal direction of the first hollow portion 100. The first portion 110 and the second portion 120 intersect in the vertical direction on both sides of the peak portion P and the valley portion V arranged in a straight line to have a mesh structure.

That is, the flexible stent 10 according to the present invention has a wire band structure composed of a peak portion P and a valley portion V is formed in the longitudinal direction of the flexible stent 10, the circumference of the circumferential surface of the stent body Accordingly, unlike the existing stent in which the peak portion P and the valley portion V are formed in the horizontal direction, the appearance of the stent may be maintained in a curved form.

In addition, since the flexible stent 10 is not restored to a straight shape, which is the first form of the stent, the flexible stent 10 is suitable for insertion of curved surgical sites such as the large intestine or duodenum and does not cause perforation of the surgical sites.

The second hollow portion 200 is a second wire (W2) provided separately from the first wire (W1) along the fixing pin (F) is not wound around the first wire (W1) forming the first hollow portion 100 ) Is wound in a cylindrical jig (J) in a zigzag to cross the first wire (W1), to form a separate cylindrical structure on the outer peripheral surface of the first hollow portion (100).

The second hollow part 200 rotates along the circumferential surface of the jig J, starting from another fixing pin F positioned on the same horizontal line as the first fixing pin F at which the first part 110 starts. Starting from the pinned portion F in which the third portion 210 and the third portion 210 are formed to form a plurality of rows, rotate along the circumferential surface of the jig J, and form a plurality of rows. And a fourth portion 220 intersecting with the third portion 210.

5 shows columns 3-1, 211, 3-2, 212, 3-3, 213, 3-4, 214, 3-5, 215, and 3rd. The process of manufacturing the third part 210 including the -6 rows 216 is shown. First, the 3-1st column 211 starts with the jig (starting at the X2Y1 point of the fixing pin F located on the same horizontal line as the X1Y1 point of the first fixing pin F at which the first portion 110 starts). J) move zigzag along the circumferential surface of J), passing through the points X3Y2, X4Y1, X6Y3, X7Y2, X9Y4, X11Y2, X12Y3, X13Y2, X15Y4, X16Y3, X18Y5 Form and terminate at the X1Y4 point.

The third column 212 starts at the X1Y4 point, which is the fixing pin F, in which the formation of the third column 211 is completed, and moves to the zigzag along the circumferential surface of the jig J, but X2Y3 and X3Y4. , Passing through the points located at X4Y3, X6Y5, X7Y4, X9Y6, X11Y4, X12Y5, X13Y4, X15Y6, X16Y5, and X18Y7, forms a plurality of peaks P and valleys V and ends at the X1Y6 point.

The third column 213 starts at the point X1Y6, which is the fixing pin F, in which the formation of the third column 212 is completed, and moves zigzag along the circumferential surface of the jig J, but X2Y5 and X3Y6 , Passing through the points located at X4Y5, X6Y7, X7Y6, X9Y8, X11Y6, X12Y7, X13Y6, X15Y8, X16Y7, X18Y9, forms a plurality of peaks (P) and valleys (V), and ends at the X1Y8 point. At this time, the third to third columns 213 are spaced apart from the third to second columns 212 at regular intervals, and in an embodiment of the present invention, the third to third columns 213 are the third to second columns 212. Spaced apart by a vertical distance between the starting point of the and the starting point of the third column 213.

Columns 3-4 are zigzag along the circumferential surface of jig J, starting from the X1Y8 point, which is the fixed pin F, in which the formation of the third-3rd column 213 is completed, and X2Y7 and X3Y8. , Passing through the points located at X4Y7, X6Y9, X7Y8, X9Y10, X11Y8, X12Y9, X13Y8, X15Y10, X16Y9, X18Y11, forms a plurality of peaks (P) and valleys (V), and ends at the X1Y10 point. Columns 3-4 are spaced apart from columns 3-3 at regular intervals, and in an embodiment of the present invention, columns 3-4 are the starting points of columns 3-3. And a vertical distance between the start points of the third through fourth columns 214.

Columns 3-5 215 start at the point X1Y10, which is the fixed pin F, in which the formation of the columns 3-4 214 is completed, and move zigzag along the circumferential surface of the jig J, wherein X2Y9 and X3Y10 , Passing through the points located at X4Y9, X6Y11, X7Y10, X9Y12, X11Y10, X12Y11, X13Y10, X15Y12, X16Y11, X17Y12, X18Y11, forms a plurality of peaks (P) and valleys (V), and ends at the X1Y12 point . The third through fifth columns 215 are interwoven with the peak portions P of the third through sixth columns 216 at X6Y11 and X12Y11 to be combined with the third through sixth rows 216. In addition, the third to fifth columns 215 are interwoven with the valley portions V of the third to fourth columns 214 at the X18Y11 point, thereby being combined with the third to fourth columns 214.

Rows 3-6 216 start at the X1Y12 point, which is the fixed pin F, in which the formation of the third-5th column 215 is finished, and move zigzag along the circumferential surface of the jig J, at the X9Y10 point. Intersect with the valleys V of the third to fourth columns 214 to engage with the third to fourth columns 214.

The third through

third columns

215 and 216 through 216 intersect with each other during the zigzag movement along the circumferential surface of the jig J. FIG. In other words, columns 3-5 and 215 and columns 3-6 and 216 move in the direction of the fixing pin (F) point ending from the fixing pin (F) point of the start of each row and cross each other, Columns 3-5 and 215 and 3-6 and 216 cross each other below each other when they move from the valley portion V of each column to the peak portion P, and the peak portion P of each column. When moving from) to valley (V), they cross over each other.

For example, when the third to fifth columns 215 move from the peak portion P at the X7Y10 point to the valley portion V at the X9Y12 point, the third to fifth columns 215 are arranged in the third to sixth columns ( 216 intersects above, and when columns 3-5 are moved from the valley portion V at the X9Y12 point to the peak portion P at the X11Y10 point, the third 3-5 columns 215 are the third to third portions. Intersect six columns 216 down.

6 shows columns 4-1, 221, 4-2, 222, 4-3, 223, 4-4, 224, 4-5, 225, and 4th. 4 shows the process of manufacturing the fourth part 220 including the sixth column 226. First, the fourth column 221 starts at the point X13Y12 which is the fixed pin F where the formation of the third portion 210 is completed, and then moves zigzag along the circumferential surface of the jig J, X15Y10 and X16Y11. , Passing through a point located at X18Y9, forms a plurality of peaks P and valleys V, and ends at the point X1Y10.

The 4-2nd column 222 moves from the zigzag along the circumferential surface of the jig J, starting from the X1Y10 point which is the fixing pin F in which the formation of the 4-1th column 221 is finished, but X1Y10 and X2Y11 , Passing through the points located at X3Y10, X4Y11, X6Y9, X7Y10, X9Y8, X11Y10, X12Y9, X13Y10, X15Y8, X16Y9, X18Y7, forms a plurality of peaks (P) and valleys (V), and ends at the X1Y8 point .

The third column 223 starts at the point X1Y8, which is the fixed pin F, in which the formation of the fourth column 222 is completed, and moves to the zigzag along the circumferential surface of the jig J, but X2Y9 and X3Y8. , Passing through the points located at X4Y9, X6Y7, X7Y8, X9Y6, X11Y8, X12Y7, X13Y8, X15Y6, X16Y7, X18Y5, forms a plurality of peaks (P) and valleys (V), and ends at the X1Y6 point. The third column 223 is spaced apart from the second column 222 at regular intervals, and in one embodiment of the present invention, the fourth column 223 is the starting point of the fourth column 223. And spaced apart from each other by a vertical distance between the starting points of the second column 2-222.

The 4th-4th column 224 starts at the X1Y6 point which is the fixed pin F by which the formation of the 4th-3rd column 223 is complete | finished, and moves to a zigzag along the circumferential surface of the jig J, X2Y7 and X3Y6 , Passing through the points located at X4Y7, X6Y5, X7Y6, X9Y4, X11Y6, X12Y5, X13Y6, X15Y4, X16Y5, X18Y3, forms a plurality of peaks P and valleys V and ends at the X1Y4 point. Columns 4-4 are spaced apart from the third column 223 at regular intervals, and in an embodiment of the present invention, fourth columns 224 are starting points of the fourth column 223. And a vertical distance between the start points of the fourth through fourth columns 224.

The fourth to fifth columns 225 start at the X1Y4 point, which is the fixed pin F, in which the formation of the fourth to fourth columns 224 is completed, and move zigzag along the circumferential surface of the jig J, but X2Y5 and X3Y4. , Passing through the points located at X4Y5, X6Y3, X7Y4, X9Y2, X11Y4, X12Y3, X13Y4, X15Y2, X16Y3, X18Y1, forms a plurality of peaks P and valleys V and ends at the X1Y2 point. Columns 4-5 225 are spaced apart at regular intervals from columns 4-4 224. In one embodiment of the present invention, columns 4-5 225 are starting points of columns 4-4 224. And a vertical distance between the start points of the fourth to fifth columns 225.

Columns 4-6 226 move zigzag along the circumferential surface of jig J starting at the point X1Y2 where formation of columns 4-5 225 is completed, and X2Y3, X3Y2, X4Y3, X6Y1, and X7Y2. , Passing through the points located at X8Y1, X9Y2, X10Y1, X11Y2, X12Y1, X13Y2, X14Y1, X15Y2, X16Y1, X18Y3, forms a plurality of peaks P and valleys V and ends at the X2Y1 point.

Herein, the fourth through sixth columns 226 are combined with the fourth through fifth columns 225 by crossing and interweaving the peak portions P of the fourth through fifth columns 225 at the X9Y2 and X15Y2 points, and the X18Y3 points. In FIG. 4, the fourth and fourth columns 224 are combined to intersect with the peak portions P of the fourth and fourth columns 224.

Columns 4-5 and 225 and 4-6 and 226 move in the direction of the fixing pin (F) point ending from the fixing pin (F) starting point of each row, and cross each other, the fourth Columns 225 and 4-6, 226 intersect over the other rows that cross each other when moving from the peak portion P of each column to the valley portion V, and the peak portion of the valley portion V of each column. When moving to (P), they cross below each other.

For example, when the fourth to fifth columns 225 move from the valley portion V at the X16Y3 point to the peak portion P at the X18Y1 point, the fourth to fifth columns 225 are the fourth to sixth columns ( 226 is crossed down.

FIG. 7 illustrates the formation of the third portion 210 and the fourth portion 220. As shown in FIG. 7, the second wire W2 starts from the X2Y1 point and ends at the X13Y12 point to form the third part 210, and then starts from the X13Y12 point and goes up to the X2Y1 point to the fourth part 220. ) To complete the second hollow portion 200.

At this time, since the fourth part 220 is in contact with the third part 210 at the X2Y1 point, it is preferable to join the third part 210 and the fourth part 220 by using laser welding.

8 illustrates the formation of the first portion 110 and the second portion 120 of the first hollow portion 100 and the third portion 210 and the fourth portion 220 of the second hollow portion 200. It is shown. As shown in FIG. 8, the peak portion P and the valley portion V constituting the first hollow portion 100 form a straight line in the longitudinal direction of the stent, and constitute a plurality of the second hollow portions 200. A peak portion P and a valley portion V constituting the first hollow portion 100 are positioned between the peak portion P and the valley portion V of the peak portion P and the valley portion V.

That is, the flexible stent 10 according to the present invention is different from the structure of the first hollow portion 100 and the second hollow portion 200 to form a cylindrical structure, the flexible stent 10 to the curved surgical site Even when the shape of the stent is inserted and deformed, the band structure of the first wire W1 including the peak portion P and the valley portion V does not protrude outward. Therefore, the present invention does not damage the lesion at the site of the procedure.

9 is a view illustrating a state in which the flexible stent 10 according to the present invention is compressed than the original diameter to be inserted into the stent insertion mechanism, and the first wire W1 and the second wire W2 overlap each other. When the diameter of the flexible stent 10 is compressed, the distribution of the force applied to the first wire W1 and the second wire W2 is equalized from one end to the other end of the flexible stent 10. Can be.

Therefore, when the operator is operating the flexible stent 10 on the lesion site, the operation of releasing the flexible stent 10 from the stent insertion mechanism is made easy, thereby providing convenience in the procedure.

Meanwhile, in the present invention, the first wire W1 and the second wire W2 are peak portions P or valley portions V at both ends of the first hollow portion 100 and the second hollow portion 200, respectively. The second wire (W2) is formed between the plurality of peaks (P) or valleys (V) formed by the first wire (W1) is a separate peak (P) or valley (V) To form.

The second hollow part 200 has a cylindrical structure separate from the first hollow part 100 by winding the second wire W2 in a zigzag along a fixing pin F on which the first wire W1 is not wound. It is formed. In the process of forming the second hollow part 200 by the second wire W2, the second wire W2 intersects with the adjacent first wire W1, and the second wire W2 is the first wire W1. Is wound around the fixing pin (F) that is not wound, so that the peak portion (P) and the valley portion (V) are formed at positions different from the peak portion (P) and the valley portion (V) formed by the first wire (W1). do.

For example, as shown in FIG. 10, the first wire W1 and the second wire W2 have peak portions P at one ends of the first hollow portion 100 and the second hollow portion 200, respectively. ) Is formed, and the peak portion P formed by the second wire W2 is positioned between the plurality of peak portions P formed by the first wire W1. That is, after the shape of the first hollow portion 100 is completed by the first wire W1, the fixing pin F is not wound around the first wire W1 for the manufacture of the second hollow portion 200. Accordingly, the second wire W2 is wound. In this case, the second wire W2 alternately passes through the first wire W1 in the vertical direction of the first wire W1, so that both ends of the first hollow part 100 and the second hollow part 200 are one. The cylindrical structure of the.

Meanwhile, the flexible stent 10 according to the present invention may further include an identification member (not shown) which is a wire coated with a radiopaque material. The identification member is preferably wound and wound in the form of a coil on the surface of the first wire W1 or the second wire W2, and is identified through X-ray or endoscope when the operator inserts the flexible stent 10 into the patient's lumen. Since the position of the member can be grasped, the insertion and removal of the flexible stent 10 is easy.

As described above, the detailed description of the present invention has been made by the embodiments with reference to the accompanying drawings. However, since the above-described embodiments have only been described with reference to preferred examples of the present invention, the present invention is limited to the above embodiments. It should not be understood that the scope of the present invention is to be understood by the claims and equivalent concepts described below.

Claims

A first hollow portion configured to form a plurality of peaks and valleys in which the first wire is zigzagly wound along a plurality of fixing pins provided in the cylindrical stent fabrication jig; And

A second hollow of the plurality of fixing pins, the second wire is wound in a zigzag along the fixing pin that is not wound around the first wire to cross the first wire, and form a separate cylindrical structure on the outer circumferential surface of the first hollow portion. part; Including,

When the shape of the first hollow portion is deformed, the peak portion and the valley portion constituting the first hollow portion may prevent the first wire constituting the first hollow portion from protruding out of the second hollow portion. It is located between the some peak part and valley part which comprise

Flexible stent.
The method of claim 1,

The first wire and the second wire form a peak portion or a valley portion at both ends of the first hollow portion and the second hollow portion, respectively, and the second portion between the plurality of peak portions or valley portions formed by the first wire. Characterized in that the wires form separate peaks or valleys.

Flexible stent.
The method of claim 1,

The plurality of peaks and valleys constituting the first hollow portion are arranged to be in a straight line in the longitudinal direction of the first hollow portion, and the first wire is vertically disposed on both sides of the peak and valley portions arranged in a straight line. Characterized by having a mesh structure

Flexible stent.
The method of claim 1,

The first hollow portion

A first portion starting from any fixed pin provided in the jig and rotating along the circumferential surface of the jig to form a plurality of rows; And

A second part starting from the fixing pin where the formation of the first part is completed, rotating along the circumferential surface of the jig, and forming a plurality of rows to cross the first part; Including,

The second hollow portion

A third portion starting from another fixing pin positioned on the same horizontal line as the first fixing pin at which the first portion starts and rotating along the circumferential surface of the jig to form a plurality of rows; And

A fourth part starting from the fixing pin where the third part is formed and rotating along the circumferential surface of the jig, and forming a plurality of rows to cross the third part; Characterized in that it comprises

Flexible stent.
The method of claim 4, wherein

The first part

A plurality of peaks and valleys are formed in a zigzag direction along the circumferential surface of the jig from the first fixing pin at which the first part starts, and passes through a plurality of fixing pins located on the same horizontal line as the first fixing pin. Row 1-1 to be bent to form a plurality of peaks;

Moving from the fixing pins in which the formation of the first-first row is completed to the zigzag along the circumferential surface of the jig, and bent through another plurality of the fixing pins located on the same horizontal line as the peak portion of the first-first row First to second columns forming a plurality of peaks and valleys;

A plurality of peaks are formed by moving from the fixing pins in which the formation of the first to second columns is completed to the zigzag along the circumferential surface of the jig, wherein any one of the formed peaks is one of the valleys formed in the first to second columns. Rows 1 to 3 intersecting and intertwining with any one;

A plurality of peaks are formed in the zigzag along the circumferential surface of the jig from the fixing pins in which the formation of the first to third rows is completed, and the plurality of peaks are formed in the first-first row and the first-second row. Rows 1 to 4 intersecting and interlacing with any one of the plurality of valley portions;

A plurality of peaks are formed by moving from the fixing pins in which the formation of the first to fourth rows is completed to the zigzag along the circumferential surface of the jig, wherein any one of the plurality of peaks is formed in the first to first columns. Columns 1-5 intersected with and intertwined with any of the parts; And

Columns 1-6 which move from the point at which the columns 1-5 are terminated to the zigzag along the circumferential surface of the jig, and are spaced at regular intervals from the columns 1-5; Characterized in that it comprises

Flexible stent.
The method of claim 5,

At least one peak portion formed on the same horizontal line as the peak portion formed in the first-first column among the plurality of peaks formed in the first-first column, the first-second column, and the first-third column, Characterized in that

Flexible stent.
The method of claim 6,

The first-first column, the first-second row, the first-third row and the first-third row may move in a zigzag along the circumferential surface of the jig and cross each other.

Flexible stent
The method of claim 7, wherein

The first-first column, the first-second row, the first-third column, and the first-third column are moved in the direction of the fixing pin ending from the first fixing pin of each row and cross each other, and the first-first column , Columns 1-2, columns 1-3, and columns 1-4 intersect each other over each other when moving from the valley to the peak of each column, and cross each other when moving from the peak to the valley of each column. Characterized by crossing down the column

Flexible stent.
The method of claim 4, wherein

The second part

Set the fixing pins in which the formation of the first part is completed as a starting point of the second part, move zigzag along the circumferential surface of the jig, and form a plurality of peaks and valleys on the same horizontal line as the starting point. Rows 2-1 passing through a plurality of fixing pins positioned to be bent to form a plurality of valleys;

A plurality of peaks and valleys are formed along the circumferential surface of the jig from the fixing pins in which the formation of the second column is completed, and a plurality of peaks and valleys are formed on the same horizontal line as the valleys of the second column. Rows 2-2 passing through a plurality of fixing pins to form a plurality of valleys;

A plurality of peaks and valleys are formed by moving from the fixing pins in which the formation of the second column to the second end is completed to the zigzag along the circumferential surface of the jig, wherein the plurality of valleys are formed in the columns 2-1 and 2; Rows 2 to 3 intersecting and interlacing with any one of a plurality of peaks formed in two rows;

A plurality of peaks and valleys are formed by moving from the fixing pins in which the formation of the second to third columns is completed to the zigzag along the circumferential surface of the jig, wherein any one of the valleys is formed in the second column. Rows 2-4 intersecting and interlacing with any one of the peaks; And

A plurality of peaks and valleys are formed along the circumferential surface of the jig from the fixing pins in which the formation of the second to fourth columns is completed, and a plurality of peaks and valleys are formed, and the second to fifth columns spaced at regular intervals from the second to fourth columns. ; Characterized in that it comprises

Flexible stent.
The method of claim 9,

The columns 2-1, 2-2 and 2-3 are zigzag along the circumferential surface of the jig and cross each other.

Flexible stent.
The method of claim 10,

The columns 2-1, 2-2, and 2-3 move in the direction of the fixing pins ending with the fixing pins at the beginning of each row, wherein the columns 2-1, 2-2, and 2 are moved. -3 columns are crossed over each other intersected when moving from the valley to the peak of each column, and crossed below the other intersected columns when moving from the peak to the valley of each column.

Flexible stent.
The method of claim 4, wherein

The third part

Column 3-1 starting from another fixing pin positioned on the same horizontal line as the fixing pin where the first portion starts and moving in a zigzag along the circumferential surface of the jig to form a plurality of peaks and valleys;

Columns 3-2 moving from the fixing pins in which the formation of the column 3-1 is completed to the zigzag along the circumferential surface of the jig and forming a plurality of peaks and valleys;

A plurality of peaks and valleys are formed at regular intervals from the fixed pins in which the formation of the third column is completed, along the circumferential surface of the jig along the circumferential surface of the jig, and at regular intervals from the peaks and valleys formed in the third column. Row 3-3;

A plurality of peaks and valleys are formed at regular intervals from the fixing pins in which the formation of the third column is completed, along the circumferential surface of the jig along the circumferential surface of the jig, and at regular intervals from the peaks and valleys formed in the third column. Row 3-4;

A plurality of peaks and valleys are formed by moving from the fixing pins in which the formation of the third to fourth columns is completed to the zigzag along the circumferential surface of the jig, wherein any one of the formed plurality of peaks is formed in the third to fourth rows. Rows 3 to 5 intersecting and interlacing with any one of the plurality of valley portions; And

A plurality of peaks and valleys are formed by moving from the fixing pins in which the formation of the third to fifth rows is completed to the zigzag along the circumferential surface of the jig, wherein any one of the formed plurality of peaks is formed in the third to fifth columns. Rows 3-6 which intersect and intersect any one of a plurality of valleys or a plurality of valleys formed in rows 3-4; Characterized in that it comprises

Flexible stent.
The method of claim 12,

The columns 3-5 and 3-6 move in the direction of the fixing pins ending from the starting pins of each row and cross each other, and the columns 3-5 and 3-6 are each at the peak of each row. When moving to the valley portion intersects the other columns intersected with each other, and when moving from the valley portion to the peak portion of each column is characterized

Flexible stent.
The method of claim 4, wherein

The fourth part is

Column 4-1 for setting the fixing pins at which the third part is formed to be the starting point of the fourth part, moving in zigzag along the circumferential surface of the jig, and forming a plurality of peaks and valleys;

Columns 4-2 which move from the fixing pins in which the formation of the column 4-1 is completed to the zigzag along the circumferential surface of the jig and form a plurality of peaks and valleys;

A plurality of peaks and valleys are formed at regular intervals from the fixing pins in which the formation of the second column is completed in the zigzag along the circumferential surface of the jig, and at regular intervals from the peaks and the valleys formed in the fourth column. Rows 4-3;

A plurality of peaks and valleys are formed at regular intervals from the fixing pins in which the formation of the third row is completed, along the circumferential surface of the jig, and the peaks and valleys formed in the fourth row. Rows 4-4;

A plurality of peaks and valleys are formed at regular intervals from the peaks and valleys formed in the fourth through fourth rows from the fixing pins in which the formation of the fourth to fourth rows is completed, and move along the circumferential surface of the jig. Rows 4-5; And

A plurality of peaks and valleys are formed by moving from the fixing pins in which the formation of the fourth to fifth columns is completed to the zigzag along the circumferential surface of the jig, wherein any one of the formed valleys is formed in the fourth to fourth rows. Rows 4-6 arranged to intersect and intersect any one of a plurality of peaks or a plurality of peaks formed in rows 4-5; Characterized in that it comprises

Flexible stent.
The method of claim 14,

The columns 4-5 and 4-6 move in the direction of the fixing pins ending from the fixed pins starting from each row, while the columns 4-5 and 4-6 move from the peak of each row to the valleys. Intersects the other columns intersecting with each other, and when moving from the valley portion to the peak of each column,

Flexible stent.