WO2023203596A1 - Stent production method and stent - Google Patents

Stent production method and stent Download PDF

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Publication number
WO2023203596A1
WO2023203596A1 PCT/JP2022/018008 JP2022018008W WO2023203596A1 WO 2023203596 A1 WO2023203596 A1 WO 2023203596A1 JP 2022018008 W JP2022018008 W JP 2022018008W WO 2023203596 A1 WO2023203596 A1 WO 2023203596A1
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WO
WIPO (PCT)
Prior art keywords
wire
point
stent
junction
manufacturing
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Application number
PCT/JP2022/018008
Other languages
French (fr)
Japanese (ja)
Inventor
完太 佐々木
講 瀧田
由佳 香田
Original Assignee
オリンパス株式会社
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Application filed by オリンパス株式会社 filed Critical オリンパス株式会社
Priority to PCT/JP2022/018008 priority Critical patent/WO2023203596A1/en
Publication of WO2023203596A1 publication Critical patent/WO2023203596A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure

Definitions

  • the present invention relates to a method for manufacturing a stent and a stent.
  • Patent Document 1 discloses a method for manufacturing a stent in which a wire is knitted in a zigzag pattern from one end of a jig to the other end, and then the wire is knitted in a zigzag pattern from the other end of the jig to one end.
  • the stent of Patent Document 1 includes a hooking portion in which two portions of the wire are hooked to each other. In forming the hook, after passing the end of the wire radially inside one section, it is necessary to pull the entire length of the remaining section of the wire that is not yet braided. Since the stent manufacturing method of Patent Document 1 uses one long wire, it takes time to form each engaging portion, and as a result, it takes a long time to manufacture the stent.
  • the present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a stent manufacturing method and stent that can shorten the stent manufacturing time.
  • One aspect of the present invention is a method for manufacturing a stent formed by weaving a wire from a first point through a continuous path to the first point, the method comprising: providing a first wire and a second wire; , braiding the first wire from the first point to a joining point, braiding the second wire from the joining point to the first point, one end of the first wire and the second wire at the first point. and joining the other end of the first wire and the other end of the second wire to each other at the joining point, the first wire and the second wire
  • Another aspect of the invention is a method of manufacturing a stent formed by weaving a wire through a continuous path from a first point to a second point, the method comprising: providing a first wire and a second wire; , braiding the first wire from the first point to a junction between the first and second points, braiding the second wire from the junction to the second point, and joining one end of the first wire and one end of the second wire to each other at a joining point, wherein the first wire and the second wire divide the total length of the wires constituting the stent into two.
  • This is a method of manufacturing a stent having divided lengths.
  • Another aspect of the invention is to weave a wire through a continuous first path from a first point to a second point, and from a third point near the first point to a fourth point near the second point.
  • the third wire and the fourth wire have a length that is half of the total length of the wire constituting the stent.
  • Another aspect of the invention is a stent formed from a wire braided from a first point through a continuous path to said first point, the first wire being braided from said first point to a junction point.
  • Another aspect of the invention is a stent formed from a wire woven through a continuous path from a first point to a second point, the stent being formed from a wire woven through a continuous path from the first point to the first point and the second point. a first wire braided to a junction between said junction point and a second wire braided from said junction point to said second point;
  • the stent is provided with a joint portion in which one end of the stent and a joint portion are joined to each other.
  • Another aspect of the invention includes a wire woven through a continuous first path from a first point to a second point; and another wire woven through a continuous second path up to four points, the first wire woven from the first point to the second point, and the third point.
  • the stent includes a joint portion where one end of the third wire and one end of the fourth wire are joined to each other.
  • FIG. 2 is a side view of the stent according to the first embodiment.
  • FIG. 2 is a developed view of the stent of FIG. 1;
  • FIG. 2 is a partially enlarged view of the stent of FIG. 1;
  • It is a figure which shows the procedure of forming an engaging part.
  • It is a flowchart of the manufacturing method of the stent concerning a 1st embodiment. It is a figure showing an example of the jig used in a manufacturing method.
  • FIG. 2 is a developed view of a modified example of the stent in FIG. 1;
  • FIG. 2 is a developed view of another modification of the stent in FIG. 1;
  • FIG. 3 is a developed view of a stent according to a second embodiment.
  • FIG. 7 is a side view of a stent according to a third embodiment.
  • FIG. 12 is a partially enlarged view of the stent of FIG. 11; It is a flowchart of the manufacturing method of the stent concerning a 3rd embodiment.
  • FIGS. 1 and 2 A stent and a method for manufacturing the stent according to a first embodiment of the present invention will be described with reference to the drawings.
  • the stent 10 according to this embodiment is formed by weaving wire into a cylindrical shape.
  • FIG. 2 is a developed view of the stent 10 expanded in the circumferential direction, with the vertical direction corresponding to the longitudinal direction of the stent 10 and the lateral direction corresponding to the circumferential direction of the stent 10.
  • the stent 10 has a starting point (first point) S/E, and is formed by sequentially weaving two wires 1 and 2 from the starting point S/E through a continuous predetermined path to the starting point S/E. has been done. That is, the starting point S/E is also the end point of the predetermined route.
  • the stent 10 includes a first wire 1 woven in a zigzag pattern along a predetermined path from a starting point S/E to a junction point A, and a first wire 1 woven from a starting point S/E to a starting point S/E.
  • first wire 1 is shown as a thick solid line
  • second wire 2 is shown as a thick broken line.
  • the starting point S/E is an arbitrary position on the predetermined route.
  • the junction point A is a position different from the starting point S/E on the predetermined route, and is determined depending on the starting point S/E and the length of the first wire 1.
  • the starting point S/E is located between one end 10a and the other end 10b of the stent 10, and the joining point A is located between the starting point S/E and the other end 10b. Therefore, the first wire 1 is braided from the starting point S/E to the junction point A via the other end 10b, and the second wire 2 is braided from the junction point A to the starting point S/E via the one end 10a. ing.
  • the central portion of the stent 10 in the longitudinal direction is placed at the stenosis of the tubular organ and contributes to relief of the stenosis. Since the strength of the joints 5A, 5B is weaker than the other parts of the stent 10, it is preferable that at least one of the joints 5A, 5B be disposed at a position away from the center of the stent 10. Therefore, as shown in FIGS. 1 and 2, the starting point S/E is preferably a position away from the center of the stent 10 toward one end 10a.
  • the stent 10 is formed from two wires 1, 2 connected in series with each other. Therefore, the wires 1 and 2 have a length obtained by dividing the total length L of the wires constituting the stent 10 (that is, the total length of the predetermined route) into two, and are each shorter than the total length L. In this embodiment, each of the wires 1 and 2 has a length L/2, which is half the total length L.
  • the two portions of the wires 1 and 2 are mutually caught at the intersection of the plurality of rows of vertical lines a1, a2, ..., a11 and the plurality of rows of circumferential lines b1, b2, ..., b11. It has a hooking part 7 (see FIG. 3).
  • the plurality of vertical lines a1, a2, . . . extend in the longitudinal direction of the stent 10 and divide the circumference of the stent 10 into a plurality of equal parts.
  • the stent 10 extend in the circumferential direction of the stent 10, equally divide the length of the stent 10 into a plurality of lines, and are orthogonal to the vertical lines.
  • the stent 10 also has a straight line intersection part 8 (see FIG. 3) where the two substantially straight straight parts 8a and 8b of the wires 1 and 2 intersect with each other.
  • the two parts of the wires 1, 2 are mutually displaced at the engagement part 7 and the straight intersection part 8.
  • the starting point S/E and the joining point A where the joining parts 5A and 5B are formed may be at positions other than the engaging part 7 and the straight intersection part 8.
  • FIG. 3 shows an enlarged view of a portion of stent 10.
  • Each of the zigzag wires 1 and 2 has peaks 7a and valleys 7b arranged alternately in the circumferential direction of the stent 10.
  • the mountain portion 7a is a portion of the wires 1 and 2 that is bent toward one end 10a and protrudes toward the other end 10b.
  • the trough portion 7b is a portion of the wires 1 and 2 that is bent toward the other end 10b and protrudes toward the one end 10a.
  • the engaging portion 7 is formed from a peak portion 7a and a valley portion 7b that are engaged with each other.
  • the peak portions 7a and the valley portions 7b are connected to each other so as to be freely displaceable.
  • the stent 10 can maintain its tubular shape using only the wires 1 and 2, and can be flexibly curved with little or no elastic force to return to the straight shape.
  • FIG. 4 explains the procedure for forming the engaging part 7.
  • this procedure includes a step of passing the tip of the wire 1 or 2 through the radially inner side of the peak portion 7a or the trough portion 7b (left figure), and a step of pulling the wire 1 or 2 (center figure). , and the step of folding back the wire 1 or 2 (see the right figure).
  • the pulling process it is necessary to pull the entire length of the remaining part of the wire 1 or 2 that is not yet braided. Therefore, the longer the wires 1, 2, the longer the time required for the pulling process.
  • the method for manufacturing the stent 10 includes step SA1 of preparing a jig 40, step SA2 of preparing two wires 1 and 2, and setting the first wire 1 as a starting point.
  • Step SA3 of knitting from S/E to joining point A Step SA4 of knitting the second wire 2 from joining point A to starting point S/E, Step SA5 of removing the knitted wires 1 and 2 from the jig 40, and the starting point Step SA6 of joining one end of the first wire 1 and one end of the second wire 2 to each other in S/E, and joining the other end of the first wire 1 and the other end of the second wire 2 to each other at the joining point A.
  • step SA7 of joining The method for manufacturing the stent 10 includes step SA8 of attaching an X-ray visibility marker to the braided wires 1 and 2, step SA9 of pre-cleaning the braided wires 1 and 2, and heat treatment of the braided wires 1 and 2.
  • the process may further include step SA10.
  • FIG. 6 shows an example of the jig 40.
  • the jig 40 includes a cylindrical shaft 41 and a plurality of pins 42 attached to the outer peripheral surface of the shaft 41.
  • a hole for inserting a pin 42 is provided on the outer circumferential surface of the shaft 41 at a position corresponding to the intersection in the exploded view of FIG.
  • pins 42 are inserted and attached to holes corresponding to peaks 7a and troughs 7b.
  • step SA2 a first wire 1 and a second wire 2 each having a length L/2, which is half the total length L necessary for forming the stent 10, are prepared. Wires 1, 2 may be prepared by splitting one wire of length L in half, or may be prepared separately.
  • the order of step SA1 and step SA2 is arbitrary, and step SA1 may be performed after step SA2.
  • step SA3 the first wire 1 is knitted along a predetermined path from the starting point S/E to the joining point A via the other end 10b while being wound in the circumferential direction.
  • step SA4 the second wire 2 is knitted along a predetermined path from the joining point A to the starting point S/E via the one end 10a while being wound in the circumferential direction.
  • steps SA3 and SA4 include the step of forming the engaging portion 7 shown in FIG. 4. Specifically, in step SA3, in the process of weaving the first wire 1 from the one end 10a to the joining point A, the engaging portion 7 is formed. In step SA4, the engaging portion 7 is formed in the process of knitting from the joining point A to the starting point S/E and in the process of knitting from the other end 10b to the starting point S/E.
  • steps SA3 and SA4 steps SA8, SA9, and SA10 are performed as necessary.
  • the X-ray visible marker is used to enable the stent 10 inserted into the body to be observed from outside the body using X-rays.
  • Step SA8 may be omitted.
  • step SA10 when the wires 1 and 2 are made of a shape memory alloy such as NiTi, the wires 1 and 2 are subjected to heat treatment to cause the wires 1 and 2 to memorize the knitted shape. Before step SA10, pre-cleaning of the wires 1 and 2 in step SA9 may be performed.
  • step SA5 the pin 42 is removed from the shaft 41, and then the braided wires 1 and 2 are removed from the shaft 41.
  • step SA6 one end of the first wire 1 and one end of the second wire 2 are joined to each other at the starting point S/E to form the first joint portion 5A.
  • step SA7 the other end of the first wire 1 and the other end of the second wire 2 are joined to each other at the joining point A to form the second joining part 5B.
  • Steps SA6 and SA7 may be executed not only after steps SA8 to SA10 and SA5 but also at any timing after step SA4. Further, step SA6 may be executed during step SA4.
  • the ends of the wires 1 and 2 are joined in steps SA6 and SA7 by caulking, laser welding, close winding, or using an X-ray visible marker.
  • Caulking is a method of crimping the ends of the wires 1 and 2 and the pipe by caulking a metal pipe into which the ends of the wires 1 and 2 are inserted.
  • Tight winding is a method in which one end of the wires 1, 2 is tightly wound around the other end of the wires 1, 2.
  • the ends of the wires 1, 2 may each be fixed to an X-ray visible marker.
  • the stent 10 is formed from two wires 1 and 2 having a length L/2, which is obtained by dividing the entire length L. Therefore, in forming the engaging part 7 in steps SA3 and SA4, the lengths of the wires 1 and 2 to be pulled are shorter than when one wire of length L is used, and the wires 1 and 2 are pulled.
  • the time required for the process is shortened.
  • the pulling process occupies a large proportion of the time required to form the engaging parts 7, the time taken to form each engaging part 7 can be effectively shortened by shortening the time required for the pulling process. Thereby, the manufacturing time of the stent 10 can be effectively shortened.
  • the stent 10 includes many hooking portions 7, and the time required to form the hooking portions 7 occupies much of the time required for steps SA3 and SA4 for braiding the wires 1 and 2. Therefore, by shortening the time required to form each engaging portion 7, the entire manufacturing time can be effectively shortened.
  • the number of joining parts 5B increases by one by using the two wires 1 and 2, the time required for joining is sufficiently shorter than the time required for forming a large number of engaging parts 7. Therefore, by using two wires 1 and 2, the overall manufacturing time of the stent 10 can be shortened.
  • the stent 10 is formed from two wires 1 and 2 having equal lengths, but the number and length of the wires forming the stent 10 are not limited to this. , can be changed as appropriate.
  • the stent 10 may be formed from three or more wires. That is, at least one of the first wire 1 and the second wire 2 may include two or more wires that are joined to each other.
  • FIG. 7 shows a developed view of a stent 10 formed from three wires 1, 2, 3.
  • Wire 1 solid line
  • wire 2 two-dot chain line
  • the wire 3 (broken line) is knitted from the second joining point A2 to the starting point S/E via one end 10a.
  • the ends of the wires 1 and 3 are joined to each other at the joint 5A of the starting point S/E
  • the ends of the wires 1 and 2 are joined to each other at the joint 5B of the first joint A1
  • the ends of the wires 1 and 2 are joined to each other at the joint 5B of the first joint A1.
  • each of wires 1, 2, 3 is shorter than half the total length L/2. Therefore, according to the first modification, the manufacturing time of the stent 10 can be further shortened compared to the stent 10 of FIGS. 1 and 2.
  • the lengths of the plurality of wires forming the stent 10 may be different from each other.
  • FIG. 8 shows a developed view of a stent 10 formed from a first wire 1 (solid line) with a length of L/3 and a second wire 2 (broken line) with a length of 2L/3.
  • the starting point S/E can be selected arbitrarily, and the joining point A is determined by the length of the first wire 1. Therefore, by using wires of different lengths, the positions of the joints 5A, 5B can be adjusted. For example, as shown in FIG. 8, both junctions 5A and 5B can be located off-center of the stent 10.
  • Example 1 of the present invention one wire with a length of 3/L and one wire with a length of 2L/3 were used.
  • Example 2 of the present invention three wires with a length of 3/L were used.
  • the comparative example one wire of length L was used.
  • the wire is a NiTi wire.
  • the reduction rate is the reduction rate of the time required to knit all the wires, based on the comparative example.
  • Example 2 As can be seen from Table 1, compared to the comparative example, the time required to knit the wire was reduced by about 27% in Example 1 and by about 33% in Example 2. In this manner, it was confirmed that by using a plurality of wires having lengths obtained by dividing the total length L, the time for manufacturing the stent 10 can be effectively shortened. Further, in Example 2 using three wires, the manufacturing time could be further shortened than in Example 1 using two wires.
  • FIG. 9 shows a developed view of the stent 20 according to this embodiment.
  • the stent 20 of this embodiment differs from the stent 10 of the first embodiment in the way the wires are woven.
  • the stent 20 has a starting point (first point) S and an ending point (second point) E that is different from the starting point S.
  • the starting point S is located at or near one end 20a of the stent 20, and the ending point E is arranged at or near the other end 20b of the stent 20.
  • the stent 20 is formed by sequentially weaving two wires 1 and 2 from a starting point S through a continuous predetermined path to an ending point E.
  • the stent 20 includes a first wire 1 that is woven in a zigzag spiral along a predetermined route from a starting point S to a junction point A, and a first wire 1 that is woven in a zigzag spiral along a predetermined route from a junction point A to an end point E.
  • the second wire 2 is spirally knitted, a joint 5 formed at a joint A, and joints 6A and 6B formed at a starting point S and an ending point E, respectively.
  • the first wire 1 is shown as a thick solid line
  • the second wire 2 is shown as a thick broken line.
  • the junction point A is an arbitrary position between the starting point S and the ending point E on the predetermined route, and is determined according to the length of the first wire 1.
  • a joint portion 5 at a joint point A one end of the first wire 1 and one end of the second wire 2 are joined to each other.
  • a joint 6A is formed where the other end of the first wire 1 is joined to another part of the first wire 1, and at the end point E, the other end of the second wire 2 is joined to another part of the second wire 2.
  • a joint portion 6B joined to other parts is formed.
  • the stent 20 is formed from two wires 1, 2 connected in series with each other. Therefore, the wires 1 and 2 have a length obtained by dividing the total length L of the wires constituting the stent 20 (that is, the total length of the predetermined route) into two, and are each shorter than the total length L. In this embodiment, each of the wires 1 and 2 has a length L/2, which is half the total length L.
  • the circumferential lines b1, b2, ..., b8 extend continuously in a spiral shape around the central axis of the stent 20.
  • Each of the zigzag wires 1 and 2 has peaks 7a and valleys 7b arranged alternately in the circumferential direction of the stent 20.
  • the stent 20 has engaging portions 7 at intersections where the circumferential lines b1, b2,..., b8 intersect with a plurality of vertical lines.
  • vertical lines have been omitted to simplify the drawing.
  • the method for manufacturing the stent 20 includes step SB1 of preparing a jig 40, step SB2 of preparing two wires 1 and 2, and setting the first wire 1 as a starting point.
  • Step SB3 of knitting the second wire 2 from S to the junction point A Step SB4 of knitting the second wire 2 from the junction point A to the end point E, Step SB5 of removing the knitted wires 1 and 2 from the jig 40, and
  • the method includes step SB6 of joining one end of the first wire 1 and one end of the second wire 2 to each other, and step SB7 of joining the ends of the wires 1 and 2 at the starting point S and the ending point E, respectively.
  • the method for manufacturing stent 20 may further include steps SA8, SA9, and SA10 described in the first embodiment.
  • step SB1 pins 42 are inserted and attached to holes in shaft 41 corresponding to peaks 7a and troughs 7b.
  • step SB2 similarly to step SA2, the first wire 1 and the second wire 2 each having a length L/2, which is half the total length L necessary for forming the stent 20, are prepared.
  • the order of step SB1 and step SB2 is arbitrary.
  • step SB3 the first wire 1 is weaved along a predetermined path from the starting point S to the joining point A while being spirally wound in the circumferential direction.
  • step SB4 the second wire 2 is knitted along a predetermined path from the joining point A to the end point E while being spirally wound in the circumferential direction.
  • steps SB3 and SB4 each include a step of forming the engaging portion 7.
  • step SB5 the braided wires 1 and 2 are removed from the shaft 41, similarly to step SA5.
  • step SB6 similarly to step SA6, one end of the first wire 1 and one end of the second wire 2 are joined to each other at the joining point A to form the joining part 5.
  • step SB7 the other ends of the wires 1 and 2 are joined to other parts of the wires 1 and 2, respectively, to form joints 6A and 6B.
  • the stent 20 is formed from two wires 1 and 2 having a length L/2, which is obtained by dividing the entire length L. Therefore, similarly to the first embodiment, the time for forming the individual engaging portions 7 can be effectively shortened, and thereby the time for manufacturing the stent 20 can be effectively shortened.
  • the first modification and the second modification of the first embodiment can be applied.
  • the stent 20 may be formed from three or more wires. That is, at least one of the first wire 1 and the second wire 2 may include two or more wires that are joined to each other.
  • the lengths of the plurality of wires forming the stent 20 may be different from each other. For example, if the length of the first wire 1 is L/3, the length of the second wire 2 is 2L/3, and the junction point A is located away from the center of the stent 20 toward one end 20a. It's okay.
  • FIG. 11 and 12 show a side view and a partially enlarged view, respectively, of the stent 30 according to this embodiment.
  • the stent 30 differs from the stent 10 of the first embodiment in the way the wires are woven.
  • the stent 30 has a first starting point (first point) S1, a first ending point (second point) E1 different from the first starting point S1, and a second starting point (third point) located near the first starting point S1. S2, and a second end point (fourth point) E2 located near the first end point E1 and different from the second start point S2.
  • the starting points S1 and S2 are arranged at or near one end 30a of the stent 30, and the ending points E1 and E2 are arranged at or near the other end 30b of the stent 30.
  • the stent 30 weaves the wire 1 from a first starting point S1 through a continuous predetermined first path to a first end point E1, and then from a second starting point S2 through a continuous predetermined path different from the first path. It is formed by sequentially weaving the two wires 3 and 4 through the second path to the second end point E2.
  • the stent 30 includes a first wire 1 woven in a zigzag pattern from a first starting point S1 to a first end point E1 along a predetermined first path, and a predetermined first wire 1 woven from a second starting point S2 to a junction point A.
  • a third wire 3 is woven in a zigzag pattern along two routes
  • a fourth wire 4 is woven in a zigzag pattern along a predetermined second route from the junction point A to the second end point E2
  • a third wire 3 is woven in a zigzag pattern along two routes. and joint parts 6A, 6B, 6C, and 6D formed at starting points S1, S2 and ending points E1, E2.
  • the second wire 2 knitted from the second starting point S2 to the second ending point E2 consists of the third wire 3 and the fourth wire 4.
  • the first wire 1 is shown as a solid line
  • the second wire 2 is shown as a broken line.
  • the junction point A is an arbitrary position between the second starting point S2 and the second ending point E2 on the predetermined second route, and is determined according to the length of the third wire 3.
  • one end of the third wire 3 and one end of the fourth wire 4 are joined to each other.
  • One end of the first wire 1 is joined to the third wire 3 at the joining part 6A at the first starting point S1, and the other end of the third wire 3 is joined to the first wire 1 at the joining part 6B at the second starting point S2.
  • the other end of the first wire 1 is joined to the fourth wire 4 at the joint 6C at the first end point E1, and the other end of the fourth wire 4 is joined to the first wire 1 at the joint 6D at the second end point E2. has been done.
  • the stent 30 is thus formed from two wires 1, 2 woven through different paths, the second wire 2 consisting of two wires 3, 4 connected in series with each other. Ru. Therefore, the wires 3 and 4 have a length that is half of the total length L of the wires constituting the stent 30 (that is, the total length of the second path), and are each shorter than the length L/2.
  • each of the zigzag wires 1 and 2 has peaks 7a and valleys 7b arranged alternately in the circumferential direction of the stent 30.
  • the crest 7a of the first wire 1 and the trough 7b of the second wire 2 form the engaging part 7, and the trough 7b of the first wire 1 and the crest 7a of the second wire 2 form the engaging part 7. are doing.
  • the method for manufacturing the stent 30 includes a step SC1 of preparing a jig 40, a step SC2 of preparing a first wire 1 and a second wire 2, and a step SC2 of preparing a first wire 1 and a second wire 2.
  • step SC1 of preparing a jig 40
  • step SC2 of preparing a first wire 1 and a second wire 2
  • step SC2 of preparing a first wire 1 and a second wire 2.
  • the method for manufacturing stent 30 may further include steps SA8, SA9, and SA10 described in the first embodiment.
  • step SC1 pins 42 are inserted and attached to holes in shaft 41 corresponding to peaks 7a and troughs 7b.
  • step SC2 similarly to step SA2, the first wire 1 and the second wire 2 each having a length L/2, which is half the total length L necessary for forming the stent 30, are prepared.
  • the second wire 2 a third wire 3 and a fourth wire 4 are prepared.
  • the third wire 3 and the fourth wire 4 may have mutually equal lengths or may have mutually different lengths.
  • the order of step SC1 and step SC2 is arbitrary.
  • step SC3 the first wire 1 is weaved along a predetermined first path from the first starting point S1 to the first ending point E1 while spirally winding the first wire 1 in a zigzag manner in the circumferential direction.
  • step SC41 the third wire 3 is knitted along a predetermined second path from the second starting point S2 to the joining point A while spirally winding the third wire 3 in a zigzag manner in the circumferential direction.
  • step SC42 the fourth wire 4 is weaved along a predetermined second path from the joining point A to the second end point E2 while spirally winding the fourth wire 4 in a zigzag manner in the circumferential direction.
  • steps SC41 and SC42 include a step of forming the engaging portion 7.
  • step SC5 the braided wires 1, 3, and 4 are removed from the shaft 41, similarly to step SA5.
  • step SC6 similarly to step SA6, one end of the third wire 3 and one end of the fourth wire 4 are joined to each other at the joining point A to form the joining part 5.
  • step SB7 both ends of the wire 1 are joined to the wires 3 and 4, respectively, to form joints 6A and 6C.
  • the other ends of the wires 3 and 4 are joined to the wire 1, respectively, to form joint parts 6B and 6D.
  • the second wire 2 of the stent 30 is composed of two wires 3 and 4, and each wire 3 and 4 has a length obtained by dividing the entire length L/2 of the second wire 2. It has a certain quality. Therefore, in forming the engaging portion 7 in steps SC41 and SC42, the lengths of the wires 3 and 4 to be pulled are shortened compared to the case where one second wire with a length L/2 is used, and the wire 3 , 4 is shortened. Thereby, it is possible to effectively shorten the time for forming each of the engaging portions 7, and to effectively shorten the time for manufacturing the stent 30.
  • the first modification and the second modification of the first embodiment can be applied.
  • the second wire 2 of the stent 30 may be composed of three or more wires. That is, at least one of the third wire 3 and the fourth wire 4 may include two or more wires that are joined to each other.
  • the lengths of the plurality of wires constituting the second wire 2 may be different from each other.
  • the length of the third wire 3 is L/3
  • the length of the fourth wire 4 is 2L/3
  • the junction point A is located away from the center of the stent 30 toward one end 30a. It's okay.

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Abstract

This stent production method is for forming a stent (10) by weaving a wire along a continuous path from a first point (S/E) and to the first point (S/E). The stent production method comprises: preparing a first wire (1) and a second wire (2); weaving the first wire (1) from a first point (S/E) to a joining point (A); weaving the second wire (2) from the joining point (A) to the first point (S/E); joining one end of each of the first and second wires (1, 2) to each other at the first point (S/E); and joining the other end of each of the first and second wire (1, 2) to each other at the joining point (A). The first and second wire (1, 2) each have a length that is half the entire length of the wire constituting the stent (10).

Description

ステントの製造方法およびステントStent manufacturing method and stent
　本発明は、ステントの製造方法およびステントに関するものである。 The present invention relates to a method for manufacturing a stent and a stent.
　従来、血管、気管、胆管、食道、十二指腸または尿道等の管状器官の狭窄部に配置され、狭窄部を拡張するステントが知られている（例えば、特許文献１参照。）。
　特許文献１には、ワイヤを治具の一端側から他端側までジグザグに編み、続いて、ワイヤを治具の他端側から一端側までジグザグに編むステントの製造方法が開示されている。 BACKGROUND ART Stents have been known that are placed in a narrowed part of a tubular organ such as a blood vessel, trachea, bile duct, esophagus, duodenum, or urethra to dilate the narrowed part (for example, see Patent Document 1).
Patent Document 1 discloses a method for manufacturing a stent in which a wire is knitted in a zigzag pattern from one end of a jig to the other end, and then the wire is knitted in a zigzag pattern from the other end of the jig to one end.
特許第６４２０９１８号公報Patent No. 6420918
　特許文献１のステントは、ワイヤの２つの部分が相互に引っ掛かった掛合部を含む。掛合部の形成において、ワイヤの端部を１つの部分の径方向内側に通した後、未だ編まれていないワイヤの残りの部分の全長を引っ張る必要が有る。
　特許文献１のステントの製造方法は、１本の長いワイヤを使用するため、１つ１つの掛合部の形成に時間を要し、その結果、ステントの製造に長い時間を要する。 The stent of Patent Document 1 includes a hooking portion in which two portions of the wire are hooked to each other. In forming the hook, after passing the end of the wire radially inside one section, it is necessary to pull the entire length of the remaining section of the wire that is not yet braided.
Since the stent manufacturing method of Patent Document 1 uses one long wire, it takes time to form each engaging portion, and as a result, it takes a long time to manufacture the stent.
　本発明は、上述した事情に鑑みてなされたものであって、ステントの作製時間を短縮することができるステントの製造方法およびステントを提供することを目的とする。 The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a stent manufacturing method and stent that can shorten the stent manufacturing time.
　本発明の一態様は、第１地点からひと続きの経路を通って前記第１地点までワイヤを編むことによって形成されるステントの製造方法であって、第１ワイヤおよび第２ワイヤを準備すること、前記第１地点から接合点まで前記第１ワイヤを編むこと、前記接合点から前記第１地点まで前記第２ワイヤを編むこと、前記第１地点において前記第１ワイヤの一端と前記第２ワイヤの一端とを相互に接合すること、および、前記接合点において前記第１ワイヤの他端と前記第２ワイヤの他端とを相互に接合すること、を含み、前記第１ワイヤおよび前記第２ワイヤが、前記ステントを構成するワイヤの全長を２つに分割した長さを有する、ステントの製造方法である。 One aspect of the present invention is a method for manufacturing a stent formed by weaving a wire from a first point through a continuous path to the first point, the method comprising: providing a first wire and a second wire; , braiding the first wire from the first point to a joining point, braiding the second wire from the joining point to the first point, one end of the first wire and the second wire at the first point. and joining the other end of the first wire and the other end of the second wire to each other at the joining point, the first wire and the second wire A method for manufacturing a stent, in which the wire has a length obtained by dividing the total length of the wire constituting the stent into two.
　本発明の他の態様は、第１地点から第２地点までひと続きの経路を通ってワイヤを編むことによって形成されるステントの製造方法であって、第１ワイヤおよび第２ワイヤを準備すること、前記第１地点から前記第１地点と前記第２地点との間の接合点まで前記第１ワイヤを編むこと、前記接合点から前記第２地点まで前記第２ワイヤを編むこと、および、前記接合点において前記第１ワイヤの一端と前記第２ワイヤの一端とを相互に接合すること、を含み、前記第１ワイヤおよび前記第２ワイヤが、前記ステントを構成するワイヤの全長を２つに分割した長さを有する、ステントの製造方法である。 Another aspect of the invention is a method of manufacturing a stent formed by weaving a wire through a continuous path from a first point to a second point, the method comprising: providing a first wire and a second wire; , braiding the first wire from the first point to a junction between the first and second points, braiding the second wire from the junction to the second point, and joining one end of the first wire and one end of the second wire to each other at a joining point, wherein the first wire and the second wire divide the total length of the wires constituting the stent into two. This is a method of manufacturing a stent having divided lengths.
　本発明の他の態様は、第１地点から第２地点までひと続きの第１経路を通ってワイヤを編み、前記第１地点の近傍の第３地点から前記第２地点の近傍の第４地点までひと続きの第２経路を通って他のワイヤを編むことによって形成されるステントの製造方法であって、第１ワイヤおよび第２ワイヤを準備し、前記第２ワイヤが第３ワイヤおよび第４ワイヤを含む、こと、前記第１地点から前記第２地点まで前記第１ワイヤを編むこと、前記第３地点から前記第３地点と前記第４地点との間の接合点まで前記第３ワイヤを編むこと、前記接合点から前記第４地点まで前記第４ワイヤを編むこと、および、前記接合点において、前記第３ワイヤの一端と前記第４ワイヤの一端とを相互に接合すること、を含み、前記第３ワイヤおよび前記第４ワイヤが、前記ステントを構成するワイヤの全長の半分を２つに分割した長さを有する、ステントの製造方法である。 Another aspect of the invention is to weave a wire through a continuous first path from a first point to a second point, and from a third point near the first point to a fourth point near the second point. A method of making a stent formed by weaving another wire through a series of second paths until the stent is formed by providing a first wire and a second wire, the second wire passing through a third wire and a fourth wire. braiding the first wire from the first point to the second point; braiding the third wire from the third point to a junction between the third point and the fourth point; braiding, braiding the fourth wire from the junction point to the fourth point, and joining one end of the third wire and one end of the fourth wire to each other at the junction point. In the method of manufacturing a stent, the third wire and the fourth wire have a length that is half of the total length of the wire constituting the stent.
　本発明の他の態様は、第１地点からひと続きの経路を通って前記第１地点まで編まれたワイヤから形成されるステントであって、前記第１地点から接合点まで編まれた第１ワイヤと、前記接合点から前記第１地点まで編まれた第２ワイヤと、前記第１地点に形成され、前記第１ワイヤの一端と前記第２ワイヤの一端とが相互に接合された接合部と、前記接合点に形成され、前記第１ワイヤの他端と前記第２ワイヤの他端とが相互に接合された第２接合部と、を備えるステントである。 Another aspect of the invention is a stent formed from a wire braided from a first point through a continuous path to said first point, the first wire being braided from said first point to a junction point. a wire, a second wire woven from the joining point to the first point, and a joint formed at the first point where one end of the first wire and one end of the second wire are joined to each other. and a second joint part formed at the junction point and in which the other end of the first wire and the other end of the second wire are joined to each other.
　本発明の他の態様は、第１地点から第２地点までひと続きの経路を通って編まれたワイヤから形成されるステントであって、前記第１地点から前記第１地点と前記第２地点との間の接合点まで編まれた第１ワイヤと、前記接合点から前記第２地点まで編まれた第２ワイヤと、前記接合点に形成され、前記第１ワイヤの一端と前記第２ワイヤの一端とが相互に接合された接合部と、を備えるステントである。 Another aspect of the invention is a stent formed from a wire woven through a continuous path from a first point to a second point, the stent being formed from a wire woven through a continuous path from the first point to the first point and the second point. a first wire braided to a junction between said junction point and a second wire braided from said junction point to said second point; The stent is provided with a joint portion in which one end of the stent and a joint portion are joined to each other.
　本発明の他の態様は、第１地点から第２地点までひと続きの第１経路を通って編まれたワイヤと、前記第１地点の近傍の第３地点から前記第２地点の近傍の第４地点までひと続きの第２経路を通って編まれた他のワイヤとから形成されるステントであって、前記第１地点から前記第２地点まで編まれた第１ワイヤと、前記第３地点から前記第３地点と前記第４地点との間の接合点まで編まれた第３ワイヤと、前記接合点から前記第４地点まで編まれた第４ワイヤと、前記接合点に形成され、前記第３ワイヤの一端と前記第４ワイヤの一端とが相互に接合された接合部と、を備えるステントである。 Another aspect of the invention includes a wire woven through a continuous first path from a first point to a second point; and another wire woven through a continuous second path up to four points, the first wire woven from the first point to the second point, and the third point. a third wire knitted from to a junction point between the third point and the fourth point; a fourth wire braided from the junction point to the fourth point; The stent includes a joint portion where one end of the third wire and one end of the fourth wire are joined to each other.
　本発明によれば、ステントの作製時間を短縮することができるという効果を奏する。 According to the present invention, it is possible to shorten the manufacturing time of a stent.
第１実施形態に係るステントの側面図である。FIG. 2 is a side view of the stent according to the first embodiment. 図１のステントの展開図である。FIG. 2 is a developed view of the stent of FIG. 1; 図１のステントの部分拡大図である。FIG. 2 is a partially enlarged view of the stent of FIG. 1; 掛合部を形成する手順を示す図である。It is a figure which shows the procedure of forming an engaging part. 第１実施形態に係るステントの製造方法のフローチャートである。It is a flowchart of the manufacturing method of the stent concerning a 1st embodiment. 製造方法において使用される治具の一例を示す図である。It is a figure showing an example of the jig used in a manufacturing method. 図１のステントの一変形例の展開図である。FIG. 2 is a developed view of a modified example of the stent in FIG. 1; 図１のステントの他の変形例の展開図である。FIG. 2 is a developed view of another modification of the stent in FIG. 1; 第２実施形態に係るステントの展開図である。FIG. 3 is a developed view of a stent according to a second embodiment. 第２実施形態に係るステントの製造方法のフローチャートである。It is a flowchart of the manufacturing method of the stent concerning a 2nd embodiment. 第３実施形態に係るステントの側面図である。FIG. 7 is a side view of a stent according to a third embodiment. 図１１のステントの部分拡大図である。FIG. 12 is a partially enlarged view of the stent of FIG. 11; 第３実施形態に係るステントの製造方法のフローチャートである。It is a flowchart of the manufacturing method of the stent concerning a 3rd embodiment.
（第１実施形態）
　本発明の第１実施形態に係るステントおよびステントの製造方法について図面を参照して説明する。
　図１および図２に示されるように、本実施形態に係るステント１０は、ワイヤを筒状に編むことによって形成されている。図２は、ステント１０を周方向に展開した展開図であり、縦方向がステント１０の長手方向に対応し、横方向がステント１０の周方向に対応する。 (First embodiment)
A stent and a method for manufacturing the stent according to a first embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the stent 10 according to this embodiment is formed by weaving wire into a cylindrical shape. FIG. 2 is a developed view of the stent 10 expanded in the circumferential direction, with the vertical direction corresponding to the longitudinal direction of the stent 10 and the lateral direction corresponding to the circumferential direction of the stent 10.
　ステント１０は、始点（第１地点）Ｓ／Ｅを有し、始点Ｓ／Ｅからひと続きの所定の経路を通って始点Ｓ／Ｅまで２本のワイヤ１，２を順番に編むことによって形成されている。すなわち、始点Ｓ／Ｅは、所定の経路の終点でもある。
　具体的には、図２に示されるように、ステント１０は、始点Ｓ／Ｅから接合点Ａまで所定の経路に沿ってジグザグに編まれた第１ワイヤ１と、接合点Ａから始点Ｓ／Ｅまで所定の経路に沿ってジグザグに編まれた第２ワイヤ２と、始点Ｓ／Ｅに形成された第１接合部５Ａと、接合点Ａに形成された第２接合部５Ｂとを備える。図２において、第１ワイヤ１が太い実線で示され、第２ワイヤ２が太い破線で示されている。 The stent 10 has a starting point (first point) S/E, and is formed by sequentially weaving two wires 1 and 2 from the starting point S/E through a continuous predetermined path to the starting point S/E. has been done. That is, the starting point S/E is also the end point of the predetermined route.
Specifically, as shown in FIG. 2, the stent 10 includes a first wire 1 woven in a zigzag pattern along a predetermined path from a starting point S/E to a junction point A, and a first wire 1 woven from a starting point S/E to a starting point S/E. It includes a second wire 2 woven in a zigzag pattern along a predetermined path up to E, a first joint 5A formed at the starting point S/E, and a second joint 5B formed at the joint A. In FIG. 2, the first wire 1 is shown as a thick solid line, and the second wire 2 is shown as a thick broken line.
　始点Ｓ／Ｅは、所定の経路上の任意の位置である。接合点Ａは、所定の経路上の始点Ｓ／Ｅとは異なる位置であり、始点Ｓ／Ｅおよび第１ワイヤ１の長さに応じて決まる。
　本実施形態において、始点Ｓ／Ｅは、ステント１０の一端１０ａと他端１０ｂとの間に位置し、接合点Ａは、始点Ｓ／Ｅと他端１０ｂとの間に位置する。したがって、第１ワイヤ１は、始点Ｓ／Ｅから他端１０ｂを経由して接合点Ａまで編まれ、第２ワイヤ２は、接合点Ａから一端１０ａを経由して始点Ｓ／Ｅまで編まれている。 The starting point S/E is an arbitrary position on the predetermined route. The junction point A is a position different from the starting point S/E on the predetermined route, and is determined depending on the starting point S/E and the length of the first wire 1.
In this embodiment, the starting point S/E is located between one end 10a and the other end 10b of the stent 10, and the joining point A is located between the starting point S/E and the other end 10b. Therefore, the first wire 1 is braided from the starting point S/E to the junction point A via the other end 10b, and the second wire 2 is braided from the junction point A to the starting point S/E via the one end 10a. ing.
　始点Ｓ／Ｅの第１接合部５Ａにおいて、第１ワイヤ１の一端と第２ワイヤ２の一端とが相互に接合され、接合点Ａの第２接合部５Ｂにおいて、第１ワイヤ１の他端と第２ワイヤ２の他端とが相互に接合されている。
　ステント１０の使用時、長手方向におけるステント１０の中央部が、管状器官の狭窄部に配置され、狭窄の解除に寄与する。接合部５Ａ，５Ｂの強度はステント１０の他の部分と比較して弱くなるので、接合部５Ａ，５Ｂの少なくとも一方は、ステント１０の中央部から外れた位置に配置されることが好ましい。したがって、図１および図２に示されるように、始点Ｓ／Ｅは、ステント１０の中央部から一端１０ａ側に外れた位置であることが好ましい。 At the first joint 5A at the starting point S/E, one end of the first wire 1 and one end of the second wire 2 are joined to each other, and at the second joint 5B at the junction A, the other end of the first wire 1 and the other end of the second wire 2 are mutually joined.
When the stent 10 is used, the central portion of the stent 10 in the longitudinal direction is placed at the stenosis of the tubular organ and contributes to relief of the stenosis. Since the strength of the joints 5A, 5B is weaker than the other parts of the stent 10, it is preferable that at least one of the joints 5A, 5B be disposed at a position away from the center of the stent 10. Therefore, as shown in FIGS. 1 and 2, the starting point S/E is preferably a position away from the center of the stent 10 toward one end 10a.
　このように、ステント１０は、相互に直列に接続された２本のワイヤ１，２から形成される。したがって、ワイヤ１，２は、ステント１０を構成するワイヤの全長Ｌ（すなわち、所定の経路の全長）を２つに分割した長さを有し、全長Ｌよりもそれぞれ短い。本実施形態において、ワイヤ１，２の各々は、全長Ｌの半分の長さＬ／２を有する。 Thus, the stent 10 is formed from two wires 1, 2 connected in series with each other. Therefore, the wires 1 and 2 have a length obtained by dividing the total length L of the wires constituting the stent 10 (that is, the total length of the predetermined route) into two, and are each shorter than the total length L. In this embodiment, each of the wires 1 and 2 has a length L/2, which is half the total length L.
　ステント１０は、複数列の縦線ａ１，ａ２，…，ａ１１と複数行の円周線ｂ１，ｂ２，…，ｂ１１とが交差する交点に、ワイヤ１，２の２つの部分が相互に引っ掛かった掛合部７（図３参照。）を有する。図２に示されるように、複数列の縦線ａ１，ａ２，…は、ステント１０の長手方向に延び、ステント１０の円周を複数の均等に分割する線である。複数行の円周線ｂ１，ｂ２，…は、ステント１０の周方向に延び、ステント１０の長さを複数に均等に分割する線であり、縦線と直交する。
　また、ステント１０は、ワイヤ１，２の２つの略直線状の直線部分８ａ，８ｂが相互に交差する直線交差部８（図３参照。）を有する。
　ステント１０が管状器官の形状に沿って湾曲するとき、掛合部７および直線交差部８においてワイヤ１，２の２つの部分が相互に変位する。接合部５Ａ，５Ｂが形成される始点Ｓ／Ｅおよび接合点Ａは、掛合部７および直線交差部８以外の位置であってもよい。 In the stent 10, the two portions of the wires 1 and 2 are mutually caught at the intersection of the plurality of rows of vertical lines a1, a2, ..., a11 and the plurality of rows of circumferential lines b1, b2, ..., b11. It has a hooking part 7 (see FIG. 3). As shown in FIG. 2, the plurality of vertical lines a1, a2, . . . extend in the longitudinal direction of the stent 10 and divide the circumference of the stent 10 into a plurality of equal parts. The multiple rows of circumferential lines b1, b2, . . . extend in the circumferential direction of the stent 10, equally divide the length of the stent 10 into a plurality of lines, and are orthogonal to the vertical lines.
The stent 10 also has a straight line intersection part 8 (see FIG. 3) where the two substantially straight straight parts 8a and 8b of the wires 1 and 2 intersect with each other.
When the stent 10 is curved to follow the shape of the tubular organ, the two parts of the wires 1, 2 are mutually displaced at the engagement part 7 and the straight intersection part 8. The starting point S/E and the joining point A where the joining parts 5A and 5B are formed may be at positions other than the engaging part 7 and the straight intersection part 8.
　図３は、ステント１０の一部分の拡大図を示している。
　ジグザグのワイヤ１，２の各々は、ステント１０の周方向に交互に配列する山部７ａおよび谷部７ｂを有する。山部７ａは、一端１０ａに向かって屈曲し他端１０ｂに向かって突出するワイヤ１，２の一部分である。谷部７ｂは、他端１０ｂに向かって屈曲し一端１０ａに向かって突出するワイヤ１，２の一部分である。掛合部７は、相互に引っ掛かった山部７ａおよび谷部７ｂから形成される。 FIG. 3 shows an enlarged view of a portion of stent 10.
Each of the zigzag wires 1 and 2 has peaks 7a and valleys 7b arranged alternately in the circumferential direction of the stent 10. The mountain portion 7a is a portion of the wires 1 and 2 that is bent toward one end 10a and protrudes toward the other end 10b. The trough portion 7b is a portion of the wires 1 and 2 that is bent toward the other end 10b and protrudes toward the one end 10a. The engaging portion 7 is formed from a peak portion 7a and a valley portion 7b that are engaged with each other.
　掛合部７において、山部７ａおよび谷部７ｂは相互に変位自在に連結される。これにより、ステント１０は、ワイヤ１，２のみで円管状の形態を維持することができ、かつ、直線形状に戻ろうとする弾性力をほとんどまたは全く発生することなく柔軟に湾曲することができる。 In the engaging portion 7, the peak portions 7a and the valley portions 7b are connected to each other so as to be freely displaceable. As a result, the stent 10 can maintain its tubular shape using only the wires 1 and 2, and can be flexibly curved with little or no elastic force to return to the straight shape.
　図４は、掛合部７を形成する手順を説明している。図４に示されるように、この手順は、山部７ａまたは谷部７ｂの径方向内側にワイヤ１または２の先端部を通す工程（左図）、ワイヤ１または２を引っ張る工程（中央図）、および、ワイヤ１または２を折り返す工程（右図）、を含む。
　引っ張る工程において、未だ編まれていないワイヤ１または２の残りの部分の全長を引っ張る必要がある。したがって、ワイヤ１，２が長い程、引っ張る工程に要する時間が長くなる。 FIG. 4 explains the procedure for forming the engaging part 7. As shown in FIG. 4, this procedure includes a step of passing the tip of the wire 1 or 2 through the radially inner side of the peak portion 7a or the trough portion 7b (left figure), and a step of pulling the wire 1 or 2 (center figure). , and the step of folding back the wire 1 or 2 (see the right figure).
In the pulling process, it is necessary to pull the entire length of the remaining part of the wire 1 or 2 that is not yet braided. Therefore, the longer the wires 1, 2, the longer the time required for the pulling process.
　次に、ステント１０の製造方法について説明する。
　図５に示されるように、本実施形態に係るステント１０の製造方法は、治具４０を準備するステップＳＡ１と、２本のワイヤ１，２を準備するステップＳＡ２と、第１ワイヤ１を始点Ｓ／Ｅから接合点Ａまで編むステップＳＡ３と、第２ワイヤ２を接合点Ａから始点Ｓ／Ｅまで編むステップＳＡ４と、編まれたワイヤ１，２を治具４０から取り外すステップＳＡ５と、始点Ｓ／Ｅにおいて第１ワイヤ１の一端と第２ワイヤ２の一端とを相互に接合するステップＳＡ６と、接合点Ａにおいて第１ワイヤ１の他端と第２ワイヤ２の他端とを相互に接合するステップＳＡ７と、を含む。
　ステント１０の製造方法は、編まれたワイヤ１，２にＸ線視認性マーカを取り付けるステップＳＡ８と、編まれたワイヤ１，２を前洗浄するステップＳＡ９と、編まれたワイヤ１，２を熱処理するステップＳＡ１０と、をさらに含んでいてもよい。 Next, a method for manufacturing the stent 10 will be explained.
As shown in FIG. 5, the method for manufacturing the stent 10 according to the present embodiment includes step SA1 of preparing a jig 40, step SA2 of preparing two wires 1 and 2, and setting the first wire 1 as a starting point. Step SA3 of knitting from S/E to joining point A, Step SA4 of knitting the second wire 2 from joining point A to starting point S/E, Step SA5 of removing the knitted wires 1 and 2 from the jig 40, and the starting point Step SA6 of joining one end of the first wire 1 and one end of the second wire 2 to each other in S/E, and joining the other end of the first wire 1 and the other end of the second wire 2 to each other at the joining point A. step SA7 of joining.
The method for manufacturing the stent 10 includes step SA8 of attaching an X-ray visibility marker to the braided wires 1 and 2, step SA9 of pre-cleaning the braided wires 1 and 2, and heat treatment of the braided wires 1 and 2. The process may further include step SA10.
　図６は、治具４０の一例を示している。治具４０は、円柱状のシャフト４１と、シャフト４１の外周面に取り付けられる複数のピン４２とを有する。シャフト４１の外周面には、図２の展開図の交点に対応する位置に、ピン４２を挿入するための孔が設けられている。ステップＳＡ１において、山部７ａおよび谷部７ｂに対応する孔にピン４２を挿入し取り付ける。 FIG. 6 shows an example of the jig 40. The jig 40 includes a cylindrical shaft 41 and a plurality of pins 42 attached to the outer peripheral surface of the shaft 41. A hole for inserting a pin 42 is provided on the outer circumferential surface of the shaft 41 at a position corresponding to the intersection in the exploded view of FIG. In step SA1, pins 42 are inserted and attached to holes corresponding to peaks 7a and troughs 7b.
　ステップＳＡ２において、ステント１０の形成に必要な全長Ｌの半分の長さＬ／２をそれぞれ有する第１ワイヤ１および第２ワイヤ２を準備する。ワイヤ１，２は、長さＬの１本のワイヤを半分に分割することによって準備されてもよく、別々に準備されてもよい。
　ステップＳＡ１とステップＳＡ２の順番は任意であり、ステップＳＡ２の後にステップＳＡ１を行ってもよい。 In step SA2, a first wire 1 and a second wire 2 each having a length L/2, which is half the total length L necessary for forming the stent 10, are prepared. Wires 1, 2 may be prepared by splitting one wire of length L in half, or may be prepared separately.
The order of step SA1 and step SA2 is arbitrary, and step SA1 may be performed after step SA2.
　次に、ステップＳＡ３において、第１ワイヤ１を、周方向に巻きながら始点Ｓ／Ｅから他端１０ｂを経由して接合点Ａまで所定の経路に沿って編む。
　次に、ステップＳＡ４において、第２ワイヤ２を、周方向に巻きながら接合点Ａから一端１０ａを経由して始点Ｓ／Ｅまで所定の経路に沿って編む。 Next, in step SA3, the first wire 1 is knitted along a predetermined path from the starting point S/E to the joining point A via the other end 10b while being wound in the circumferential direction.
Next, in step SA4, the second wire 2 is knitted along a predetermined path from the joining point A to the starting point S/E via the one end 10a while being wound in the circumferential direction.
　ここで、ステップＳＡ３，ＳＡ４は、図４に示される掛合部７を形成するステップを含む。具体的には、ステップＳＡ３において、一端１０ａから接合点Ａまで第１ワイヤ１を編む過程において、掛合部７が形成される。ステップＳＡ４において、接合点Ａから始点Ｓ／Ｅまで編む過程と、他端１０ｂから始点Ｓ／Ｅまで編む過程と、において掛合部７が形成される。 Here, steps SA3 and SA4 include the step of forming the engaging portion 7 shown in FIG. 4. Specifically, in step SA3, in the process of weaving the first wire 1 from the one end 10a to the joining point A, the engaging portion 7 is formed. In step SA4, the engaging portion 7 is formed in the process of knitting from the joining point A to the starting point S/E and in the process of knitting from the other end 10b to the starting point S/E.
　ステップＳＡ３，ＳＡ４の後、必要に応じてステップＳＡ８，ＳＡ９，ＳＡ１０が行われる。
　Ｘ線視認性マーカは、体内に挿入されたステント１０をＸ線によって体外から観察可能にするためのものである。ステップＳＡ８は、省略されてもよい。
　ステップＳＡ１０において、ワイヤ１，２がＮｉＴｉのような形状記憶合金である場合、編まれた形状をワイヤ１，２に記憶させるための熱処理をワイヤ１，２に施す。ステップＳＡ１０の前に、ステップＳＡ９のワイヤ１，２の前洗浄が行われてもよい。 After steps SA3 and SA4, steps SA8, SA9, and SA10 are performed as necessary.
The X-ray visible marker is used to enable the stent 10 inserted into the body to be observed from outside the body using X-rays. Step SA8 may be omitted.
In step SA10, when the wires 1 and 2 are made of a shape memory alloy such as NiTi, the wires 1 and 2 are subjected to heat treatment to cause the wires 1 and 2 to memorize the knitted shape. Before step SA10, pre-cleaning of the wires 1 and 2 in step SA9 may be performed.
　次に、ステップＳＡ５において、ピン４２をシャフト４１から取り外し、次に、編まれたワイヤ１，２をシャフト４１から取り外す。
　次に、ステップＳＡ６において、第１ワイヤ１の一端と第２ワイヤ２の一端とを始点Ｓ／Ｅにおいて相互に接合し、第１接合部５Ａを形成する。同様に、ステップＳＡ７において、第１ワイヤ１の他端と第２ワイヤ２の他端とを接合点Ａにおいて相互に接合し、第２接合部５Ｂを形成する。ステップＳＡ６，ＳＡ７は、ステップＳＡ８～ＳＡ１０，ＳＡ５の後に限らず、ステップＳＡ４の後の任意のタイミングで実行されてもよい。また、ステップＳＡ６は、ステップＳＡ４の途中に実行されてもよい。 Next, in step SA5, the pin 42 is removed from the shaft 41, and then the braided wires 1 and 2 are removed from the shaft 41.
Next, in step SA6, one end of the first wire 1 and one end of the second wire 2 are joined to each other at the starting point S/E to form the first joint portion 5A. Similarly, in step SA7, the other end of the first wire 1 and the other end of the second wire 2 are joined to each other at the joining point A to form the second joining part 5B. Steps SA6 and SA7 may be executed not only after steps SA8 to SA10 and SA5 but also at any timing after step SA4. Further, step SA6 may be executed during step SA4.
　ステップＳＡ６，ＳＡ７におけるワイヤ１，２の端の接合は、かしめ、レーザ溶接、密着巻き、またはＸ線視認性マーカを用いて行われる。
　かしめは、ワイヤ１，２の端部が挿入された金属のパイプをかしめることによって、ワイヤ１，２の端部とパイプとを圧着する方法である。
　密着巻きは、ワイヤ１，２の一方の端部をワイヤ１，２の他方の端部にきつく巻き付ける方法である。
　ワイヤ１，２の端部が、Ｘ線視認性マーカにそれぞれ固定されてもよい。 The ends of the wires 1 and 2 are joined in steps SA6 and SA7 by caulking, laser welding, close winding, or using an X-ray visible marker.
Caulking is a method of crimping the ends of the wires 1 and 2 and the pipe by caulking a metal pipe into which the ends of the wires 1 and 2 are inserted.
Tight winding is a method in which one end of the wires 1, 2 is tightly wound around the other end of the wires 1, 2.
The ends of the wires 1, 2 may each be fixed to an X-ray visible marker.
　このように、本実施形態によれば、ステント１０は、全長Ｌを分割した長さＬ／２の２本のワイヤ１，２から形成される。したがって、ステップＳＡ３，ＳＡ４の掛合部７の形成において、長さＬの１本のワイヤを使用する場合と比較して、引っ張るべきワイヤ１，２の長さが短くなり、ワイヤ１，２を引っ張る工程に要する時間が短縮される。特に、掛合部７の形成時間において、引っ張る工程が占める割合は大きいので、引っ張る工程の時間短縮によって、個々の掛合部７の形成時間が効果的に短縮される。これにより、ステント１０の作製時間を効果的に短縮することができる。 As described above, according to the present embodiment, the stent 10 is formed from two wires 1 and 2 having a length L/2, which is obtained by dividing the entire length L. Therefore, in forming the engaging part 7 in steps SA3 and SA4, the lengths of the wires 1 and 2 to be pulled are shorter than when one wire of length L is used, and the wires 1 and 2 are pulled. The time required for the process is shortened. In particular, since the pulling process occupies a large proportion of the time required to form the engaging parts 7, the time taken to form each engaging part 7 can be effectively shortened by shortening the time required for the pulling process. Thereby, the manufacturing time of the stent 10 can be effectively shortened.
　特に、ステント１０は多くの掛合部７を含み、掛合部７の形成時間が、ワイヤ１，２を編むステップＳＡ３，ＳＡ４の所要時間の多くを占める。したがって、個々の掛合部７の形成時間の短縮によって、作製時間全体を効果的に短縮することができる。
　なお、２本のワイヤ１，２を使用することによって接合部５Ｂが１つ増えるが、接合に要する時間は、多数の掛合部７の形成に要する時間よりも十分に短い。したがって、２本のワイヤ１，２を使用することによって、ステント１０の作製時間の全体を短縮することができる。 In particular, the stent 10 includes many hooking portions 7, and the time required to form the hooking portions 7 occupies much of the time required for steps SA3 and SA4 for braiding the wires 1 and 2. Therefore, by shortening the time required to form each engaging portion 7, the entire manufacturing time can be effectively shortened.
Although the number of joining parts 5B increases by one by using the two wires 1 and 2, the time required for joining is sufficiently shorter than the time required for forming a large number of engaging parts 7. Therefore, by using two wires 1 and 2, the overall manufacturing time of the stent 10 can be shortened.
　上記実施形態において、ステント１０が、等しい長さを有する２本のワイヤ１，２から形成されることとしたが、ステント１０を形成するワイヤの数および長さはこれに限定されるものではなく、適宜変更可能である。
　本実施形態の第１変形例において、ステント１０は、３本以上のワイヤから形成されてもよい。すなわち、第１ワイヤ１および第２ワイヤ２の少なくとも一方が、相互に接合される２本以上のワイヤを含んでいてもよい。 In the above embodiment, the stent 10 is formed from two wires 1 and 2 having equal lengths, but the number and length of the wires forming the stent 10 are not limited to this. , can be changed as appropriate.
In a first variant of this embodiment, the stent 10 may be formed from three or more wires. That is, at least one of the first wire 1 and the second wire 2 may include two or more wires that are joined to each other.
　図７は、３本のワイヤ１，２，３から形成されるステント１０の展開図を示している。ワイヤ１（実線）は、始点Ｓ／Ｅから他端１０ｂを経由して第１接合点Ａ１まで編まれ、ワイヤ２（二点鎖線）は、第１接合点Ａ１から第２接合点Ａ２まで編まれ、ワイヤ３（破線）は、第２接合点Ａ２から一端１０ａを経由して始点Ｓ／Ｅまで編まれる。始点Ｓ／Ｅの接合部５Ａにおいてワイヤ１，３の端が相互に接合され、第１接合点Ａ１の接合部５Ｂにおいてワイヤ１，２の端が相互に接合され、第２接合点Ａ２の接合部５Ｃにおいて、ワイヤ２，３の端が相互に接合される。
　ワイヤ１，２，３の各々は、全長の半分Ｌ／２よりも短い。したがって、第１変形例によれば、図１および図２のステント１０と比較して、ステント１０の作製時間をさらに短縮することができる。 FIG. 7 shows a developed view of a stent 10 formed from three wires 1, 2, 3. Wire 1 (solid line) is knitted from the starting point S/E to the first joint point A1 via the other end 10b, and wire 2 (two-dot chain line) is knitted from the first joint point A1 to the second joint point A2. The wire 3 (broken line) is knitted from the second joining point A2 to the starting point S/E via one end 10a. The ends of the wires 1 and 3 are joined to each other at the joint 5A of the starting point S/E, the ends of the wires 1 and 2 are joined to each other at the joint 5B of the first joint A1, and the ends of the wires 1 and 2 are joined to each other at the joint 5B of the first joint A1. At section 5C, the ends of wires 2 and 3 are joined together.
Each of wires 1, 2, 3 is shorter than half the total length L/2. Therefore, according to the first modification, the manufacturing time of the stent 10 can be further shortened compared to the stent 10 of FIGS. 1 and 2.
　本実施形態の第２変形例において、ステント１０を形成する複数本のワイヤの長さが、相互に異なっていてもよい。
　図８は、長さＬ／３の第１ワイヤ１（実線）と、長さ２Ｌ／３の第２ワイヤ２（破線）と、から形成されるステント１０の展開図を示している。
　上述したように、始点Ｓ／Ｅは任意に選択可能であり、接合点Ａは、第１ワイヤ１の長さによって決まる。したがって、異なる長さのワイヤを使用することによって接合部５Ａ，５Ｂの位置を調整することができる。例えば、図８に示されるように、接合部５Ａ，５Ｂの両方を、ステント１０の中央部から外れた位置に配置することができる。 In the second modification of this embodiment, the lengths of the plurality of wires forming the stent 10 may be different from each other.
FIG. 8 shows a developed view of a stent 10 formed from a first wire 1 (solid line) with a length of L/3 and a second wire 2 (broken line) with a length of 2L/3.
As mentioned above, the starting point S/E can be selected arbitrarily, and the joining point A is determined by the length of the first wire 1. Therefore, by using wires of different lengths, the positions of the joints 5A, 5B can be adjusted. For example, as shown in FIG. 8, both junctions 5A and 5B can be located off-center of the stent 10.
　下記の表１は、本実施形態に係るステント１０の製造方法の実施例を示している。
　本発明の実施例１において、長さ３／Ｌの１本のワイヤと、長さ２Ｌ／３の１本のワイヤと、を使用した。本発明の実施例２において、長さ３／Ｌの３本のワイヤを使用した。比較例において、長さＬの１本のワイヤを使用した。実施例１，２および比較例において、ワイヤは、ＮｉＴｉ線である。削減率は、比較例を基準としたときの、ワイヤを全て編むのに要する時間の削減率である。 Table 1 below shows an example of the method for manufacturing the stent 10 according to the present embodiment.
In Example 1 of the present invention, one wire with a length of 3/L and one wire with a length of 2L/3 were used. In Example 2 of the present invention, three wires with a length of 3/L were used. In the comparative example, one wire of length L was used. In Examples 1 and 2 and Comparative Example, the wire is a NiTi wire. The reduction rate is the reduction rate of the time required to knit all the wires, based on the comparative example.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　表１から分かるように、比較例と比較し、ワイヤを編むのに要する時間は、実施例１では約２７％短縮され、実施例２では約３３％短縮された。
　このように、全長Ｌを分割した長さの複数本のワイヤを使用することによって、ステント１０の作製時間を効果的に短縮することができることが確認された。また、３本のワイヤを使用する実施例２は、２本のワイヤを使用する実施例１よりも、作製時間をさらに短縮することができた。 As can be seen from Table 1, compared to the comparative example, the time required to knit the wire was reduced by about 27% in Example 1 and by about 33% in Example 2.
In this manner, it was confirmed that by using a plurality of wires having lengths obtained by dividing the total length L, the time for manufacturing the stent 10 can be effectively shortened. Further, in Example 2 using three wires, the manufacturing time could be further shortened than in Example 1 using two wires.
（第２実施形態）
　次に、本発明の第２実施形態に係るステントおよびステントの製造方法について説明する。
　図９は、本実施形態に係るステント２０の展開図を示している。図９に示されるように、本実施形態のステント２０は、ワイヤの編み方において第１実施形態のステント１０と相違する。 (Second embodiment)
Next, a stent and a method for manufacturing the stent according to a second embodiment of the present invention will be described.
FIG. 9 shows a developed view of the stent 20 according to this embodiment. As shown in FIG. 9, the stent 20 of this embodiment differs from the stent 10 of the first embodiment in the way the wires are woven.
　ステント２０は、始点（第１地点）Ｓと、始点Ｓとは異なる終点（第２地点）Ｅとを有し、始点Ｓは、ステント２０の一端２０ａまたは一端２０ａの近傍に配置され、終点Ｅは、ステント２０の他端２０ｂまたは他端２０ｂの近傍に配置される。ステント２０は、始点Ｓからひと続きの所定の経路を通って終点Ｅまで２本のワイヤ１，２を順番に編むことによって形成されている。 The stent 20 has a starting point (first point) S and an ending point (second point) E that is different from the starting point S. The starting point S is located at or near one end 20a of the stent 20, and the ending point E is arranged at or near the other end 20b of the stent 20. The stent 20 is formed by sequentially weaving two wires 1 and 2 from a starting point S through a continuous predetermined path to an ending point E.
　具体的には、ステント２０は、始点Ｓから接合点Ａまで所定の経路に沿ってジグザグに螺旋状に編まれた第１ワイヤ１と、接合点Ａから終点Ｅまで所定の経路に沿ってジグザグに螺旋状に編まれた第２ワイヤ２と、接合点Ａに形成された接合部５と、始点Ｓおよび終点Ｅにそれぞれ形成された接合部６Ａ，６Ｂと、を備える。図９において、第１ワイヤ１が太い実線で示され、第２ワイヤ２が太い破線で示されている。 Specifically, the stent 20 includes a first wire 1 that is woven in a zigzag spiral along a predetermined route from a starting point S to a junction point A, and a first wire 1 that is woven in a zigzag spiral along a predetermined route from a junction point A to an end point E. The second wire 2 is spirally knitted, a joint 5 formed at a joint A, and joints 6A and 6B formed at a starting point S and an ending point E, respectively. In FIG. 9, the first wire 1 is shown as a thick solid line, and the second wire 2 is shown as a thick broken line.
　接合点Ａは、所定の経路上の始点Ｓと終点Ｅとの間の任意の位置であり、第１ワイヤ１の長さに応じて決まる。接合点Ａの接合部５おいて、第１ワイヤ１の一端と第２ワイヤ２の一端とが相互に接合されている。
　始点Ｓには、第１ワイヤ１の他端が第１ワイヤ１の他の部分と接合された接合部６Ａが形成され、終点Ｅには、第２ワイヤ２の他端が第２ワイヤ２の他の部分と接合された接合部６Ｂが形成されている。 The junction point A is an arbitrary position between the starting point S and the ending point E on the predetermined route, and is determined according to the length of the first wire 1. At a joint portion 5 at a joint point A, one end of the first wire 1 and one end of the second wire 2 are joined to each other.
At the starting point S, a joint 6A is formed where the other end of the first wire 1 is joined to another part of the first wire 1, and at the end point E, the other end of the second wire 2 is joined to another part of the second wire 2. A joint portion 6B joined to other parts is formed.
　このように、ステント２０は、相互に直列に接続された２本のワイヤ１，２から形成される。したがって、ワイヤ１，２は、ステント２０を構成するワイヤの全長Ｌ（すなわち、所定の経路の全長）を２つに分割した長さを有し、全長Ｌよりもそれぞれ短い。本実施形態において、ワイヤ１，２の各々は、全長Ｌの半分の長さＬ／２を有する。 Thus, the stent 20 is formed from two wires 1, 2 connected in series with each other. Therefore, the wires 1 and 2 have a length obtained by dividing the total length L of the wires constituting the stent 20 (that is, the total length of the predetermined route) into two, and are each shorter than the total length L. In this embodiment, each of the wires 1 and 2 has a length L/2, which is half the total length L.
　図９に示されるように、円周線ｂ１，ｂ２，…，ｂ８は、ステント２０の中心軸回りにひと続きに螺旋状に延びる。ジグザグのワイヤ１，２の各々は、ステント２０の周方向に交互に配列する山部７ａおよび谷部７ｂを有する。ステント２０は、円周線ｂ１，ｂ２，…，ｂ８が複数の縦線と交差する交点に、掛合部７を有する。図９において、図面を簡略にするために縦線は省略されている。 As shown in FIG. 9, the circumferential lines b1, b2, ..., b8 extend continuously in a spiral shape around the central axis of the stent 20. Each of the zigzag wires 1 and 2 has peaks 7a and valleys 7b arranged alternately in the circumferential direction of the stent 20. The stent 20 has engaging portions 7 at intersections where the circumferential lines b1, b2,..., b8 intersect with a plurality of vertical lines. In FIG. 9, vertical lines have been omitted to simplify the drawing.
　次に、ステント２０の製造方法について説明する。
　図１０に示されるように、本実施形態に係るステント２０の製造方法は、治具４０を準備するステップＳＢ１と、２本のワイヤ１，２を準備するステップＳＢ２と、第１ワイヤ１を始点Ｓから接合点Ａまで編むステップＳＢ３と、第２ワイヤ２を接合点Ａから終点Ｅまで編むステップＳＢ４と、編まれたワイヤ１，２を治具４０から取り外すステップＳＢ５と、接合点Ａにおいて第１ワイヤ１の一端と第２ワイヤ２の一端とを相互に接合するステップＳＢ６と、始点Ｓおよび終点Ｅにおいてワイヤ１，２の端をそれぞれ接合するステップＳＢ７と、を含む。
　ステント２０の製造方法は、第１実施形態において説明したステップＳＡ８，ＳＡ９，ＳＡ１０をさらに含んでいてもよい。 Next, a method for manufacturing the stent 20 will be explained.
As shown in FIG. 10, the method for manufacturing the stent 20 according to the present embodiment includes step SB1 of preparing a jig 40, step SB2 of preparing two wires 1 and 2, and setting the first wire 1 as a starting point. Step SB3 of knitting the second wire 2 from S to the junction point A, Step SB4 of knitting the second wire 2 from the junction point A to the end point E, Step SB5 of removing the knitted wires 1 and 2 from the jig 40, and The method includes step SB6 of joining one end of the first wire 1 and one end of the second wire 2 to each other, and step SB7 of joining the ends of the wires 1 and 2 at the starting point S and the ending point E, respectively.
The method for manufacturing stent 20 may further include steps SA8, SA9, and SA10 described in the first embodiment.
　ステップＳＢ１において、山部７ａおよび谷部７ｂに対応するシャフト４１の孔にピン４２を挿入し取り付ける。
　ステップＳＢ２において、ステップＳＡ２と同様に、ステント２０の形成に必要な全長Ｌの半分の長さＬ／２をそれぞれ有する第１ワイヤ１および第２ワイヤ２を準備する。
　ステップＳＢ１とステップＳＢ２の順番は任意である。 In step SB1, pins 42 are inserted and attached to holes in shaft 41 corresponding to peaks 7a and troughs 7b.
In step SB2, similarly to step SA2, the first wire 1 and the second wire 2 each having a length L/2, which is half the total length L necessary for forming the stent 20, are prepared.
The order of step SB1 and step SB2 is arbitrary.
　次に、ステップＳＢ３において、第１ワイヤ１を、周方向に螺旋状に巻きながら始点Ｓから接合点Ａまで所定の経路に沿って編む。
　次に、ステップＳＢ４において、第２ワイヤ２を、周方向に螺旋状に巻きながら接合点Ａから終点Ｅまで所定の経路に沿って編む。
　ここで、ステップＳＢ３，ＳＢ４は、掛合部７を形成するステップをそれぞれ含む。 Next, in step SB3, the first wire 1 is weaved along a predetermined path from the starting point S to the joining point A while being spirally wound in the circumferential direction.
Next, in step SB4, the second wire 2 is knitted along a predetermined path from the joining point A to the end point E while being spirally wound in the circumferential direction.
Here, steps SB3 and SB4 each include a step of forming the engaging portion 7.
　次に、ステップＳＢ５において、ステップＳＡ５と同様に、編まれたワイヤ１，２をシャフト４１から取り外す。
　次に、ステップＳＢ６において、ステップＳＡ６と同様に、第１ワイヤ１の一端と第２ワイヤ２の一端とを接合点Ａにおいて相互に接合し、接合部５を形成する。また、ステップＳＢ７において、ワイヤ１，２の他端をワイヤ１，２の他の部分とそれぞれ接合し、接合部６Ａ，６Ｂを形成する。 Next, in step SB5, the braided wires 1 and 2 are removed from the shaft 41, similarly to step SA5.
Next, in step SB6, similarly to step SA6, one end of the first wire 1 and one end of the second wire 2 are joined to each other at the joining point A to form the joining part 5. Further, in step SB7, the other ends of the wires 1 and 2 are joined to other parts of the wires 1 and 2, respectively, to form joints 6A and 6B.
　このように、本実施形態によれば、ステント２０は、全長Ｌを分割した長さＬ／２の２本のワイヤ１，２から形成される。したがって、第１実施形態と同様に、個々の掛合部７の形成時間を効果的に短縮することができ、それにより、ステント２０の作製時間を効果的に短縮することができる。 As described above, according to the present embodiment, the stent 20 is formed from two wires 1 and 2 having a length L/2, which is obtained by dividing the entire length L. Therefore, similarly to the first embodiment, the time for forming the individual engaging portions 7 can be effectively shortened, and thereby the time for manufacturing the stent 20 can be effectively shortened.
　本実施形態においても、第１実施形態の第１変形例および第２変形例を適用することができる。
　具体的には、本実施形態の第１変形例において、ステント２０は、３本以上のワイヤから形成されてもよい。すなわち、第１ワイヤ１および第２ワイヤ２の少なくとも一方が、相互に接合される２本以上のワイヤを含んでいてもよい。
　本実施形態の第２変形例において、ステント２０を形成する複数本のワイヤの長さが、相互に異なっていてもよい。例えば、第１ワイヤ１の長さがＬ／３であり、第２ワイヤ２の長さが２Ｌ／３であり、接合点Ａが、ステント２０の中央部から一端２０ａ側に外れた位置であってもよい。 Also in this embodiment, the first modification and the second modification of the first embodiment can be applied.
Specifically, in the first modification of this embodiment, the stent 20 may be formed from three or more wires. That is, at least one of the first wire 1 and the second wire 2 may include two or more wires that are joined to each other.
In the second modification of the present embodiment, the lengths of the plurality of wires forming the stent 20 may be different from each other. For example, if the length of the first wire 1 is L/3, the length of the second wire 2 is 2L/3, and the junction point A is located away from the center of the stent 20 toward one end 20a. It's okay.
（第３実施形態）
　次に、本発明の第３実施形態に係るステントおよびステントの製造方法について説明する。
　図１１および図１２は、本実施形態に係るステント３０の側面図および部分拡大図をそれぞれ示している。ステント３０は、ワイヤの編み方において第１実施形態のステント１０と相違する。 (Third embodiment)
Next, a stent and a method for manufacturing the stent according to a third embodiment of the present invention will be described.
11 and 12 show a side view and a partially enlarged view, respectively, of the stent 30 according to this embodiment. The stent 30 differs from the stent 10 of the first embodiment in the way the wires are woven.
　ステント３０は、第１始点（第１地点）Ｓ１と、第１始点Ｓ１とは異なる第１終点（第２地点）Ｅ１と、第１始点Ｓ１の近傍に位置する第２始点（第３地点）Ｓ２と、第１終点Ｅ１の近傍に位置し第２始点Ｓ２とは異なる第２終点（第４地点）Ｅ２とを有する。始点Ｓ１，Ｓ２は、ステント３０の一端３０ａまたは一端３０ａの近傍に配置され、終点Ｅ１，Ｅ２は、ステント３０の他端３０ｂまたは他端３０ｂの近傍に配置される。ステント３０は、第１始点Ｓ１からひと続きの所定の第１経路を通って第１終点Ｅ１までワイヤ１を編み、続いて、第２始点Ｓ２から、第１経路とは異なるひと続きの所定の第２経路を通って第２終点Ｅ２まで２本のワイヤ３，４を順番に編むことによって、形成されている。 The stent 30 has a first starting point (first point) S1, a first ending point (second point) E1 different from the first starting point S1, and a second starting point (third point) located near the first starting point S1. S2, and a second end point (fourth point) E2 located near the first end point E1 and different from the second start point S2. The starting points S1 and S2 are arranged at or near one end 30a of the stent 30, and the ending points E1 and E2 are arranged at or near the other end 30b of the stent 30. The stent 30 weaves the wire 1 from a first starting point S1 through a continuous predetermined first path to a first end point E1, and then from a second starting point S2 through a continuous predetermined path different from the first path. It is formed by sequentially weaving the two wires 3 and 4 through the second path to the second end point E2.
　具体的には、ステント３０は、第１始点Ｓ１から第１終点Ｅ１まで所定の第１経路に沿ってジグザグに編まれた第１ワイヤ１と、第２始点Ｓ２から接合点Ａまで所定の第２経路に沿ってジグザグに編まれた第３ワイヤ３と、接合点Ａから第２終点Ｅ２まで所定の第２経路に沿ってジグザグに編まれた第４ワイヤ４と、接合点Ａに形成された接合部５と、始点Ｓ１，Ｓ２および終点Ｅ１，Ｅ２に形成された接合部６Ａ，６Ｂ，６Ｃ，６Ｄと、を備える。すなわち、第２始点Ｓ２から第２終点Ｅ２まで編まれる第２ワイヤ２は、第３ワイヤ３と、第４ワイヤ４とからなる。図１２において、第１ワイヤ１が実線で示され、第２ワイヤ２が破線で示されている。 Specifically, the stent 30 includes a first wire 1 woven in a zigzag pattern from a first starting point S1 to a first end point E1 along a predetermined first path, and a predetermined first wire 1 woven from a second starting point S2 to a junction point A. A third wire 3 is woven in a zigzag pattern along two routes, a fourth wire 4 is woven in a zigzag pattern along a predetermined second route from the junction point A to the second end point E2, and a third wire 3 is woven in a zigzag pattern along two routes. and joint parts 6A, 6B, 6C, and 6D formed at starting points S1, S2 and ending points E1, E2. That is, the second wire 2 knitted from the second starting point S2 to the second ending point E2 consists of the third wire 3 and the fourth wire 4. In FIG. 12, the first wire 1 is shown as a solid line, and the second wire 2 is shown as a broken line.
　接合点Ａは、所定の第２経路上の第２始点Ｓ２と第２終点Ｅ２との間の任意の位置であり、第３ワイヤ３の長さに応じて決まる。接合点Ａの接合部５において、第３ワイヤ３の一端と第４ワイヤ４の一端とが相互に接合されている。
　第１始点Ｓ１の接合部６Ａにおいて、第１ワイヤ１の一端が第３ワイヤ３と接合され、第２始点Ｓ２の接合部６Ｂにおいて、第３ワイヤ３の他端が第１ワイヤ１と接合されている。第１終点Ｅ１の接合部６Ｃにおいて、第１ワイヤ１の他端が第４ワイヤ４と接合され、第２終点Ｅ２の接合部６Ｄにおいて、第４ワイヤ４の他端が第１ワイヤ１と接合されている。 The junction point A is an arbitrary position between the second starting point S2 and the second ending point E2 on the predetermined second route, and is determined according to the length of the third wire 3. At the joint portion 5 at the joint point A, one end of the third wire 3 and one end of the fourth wire 4 are joined to each other.
One end of the first wire 1 is joined to the third wire 3 at the joining part 6A at the first starting point S1, and the other end of the third wire 3 is joined to the first wire 1 at the joining part 6B at the second starting point S2. ing. The other end of the first wire 1 is joined to the fourth wire 4 at the joint 6C at the first end point E1, and the other end of the fourth wire 4 is joined to the first wire 1 at the joint 6D at the second end point E2. has been done.
　このように、ステント３０は、異なる経路を通って編まれた２本のワイヤ１，２から形成され、第２ワイヤ２は、相互に直列に接続された２本のワイヤ３，４から構成される。したがって、ワイヤ３，４は、ステント３０を構成するワイヤの全長Ｌの半分（すなわち、第２経路の全長）を２つに分割した長さを有し、長さＬ／２よりもそれぞれ短い。 The stent 30 is thus formed from two wires 1, 2 woven through different paths, the second wire 2 consisting of two wires 3, 4 connected in series with each other. Ru. Therefore, the wires 3 and 4 have a length that is half of the total length L of the wires constituting the stent 30 (that is, the total length of the second path), and are each shorter than the length L/2.
　図１２に示されるように、ジグザグのワイヤ１，２の各々は、ステント３０の周方向に交互に配列する山部７ａおよび谷部７ｂを有する。第１ワイヤ１の山部７ａと第２ワイヤ２の谷部７ｂとが掛合部７を形成し、第１ワイヤ１の谷部７ｂと第２ワイヤ２の山部７ａとが掛合部７を形成している。 As shown in FIG. 12, each of the zigzag wires 1 and 2 has peaks 7a and valleys 7b arranged alternately in the circumferential direction of the stent 30. The crest 7a of the first wire 1 and the trough 7b of the second wire 2 form the engaging part 7, and the trough 7b of the first wire 1 and the crest 7a of the second wire 2 form the engaging part 7. are doing.
　次に、ステント３０の製造方法について説明する。
　図１３に示されるように、本実施形態に係るステント３０の製造方法は、治具４０を準備するステップＳＣ１と、第１ワイヤ１と第２ワイヤ２とを準備するステップＳＣ２と、第１ワイヤ１を第１始点Ｓ１から第１終点Ｅ１まで編むステップＳＣ３と、第３ワイヤ３を第２始点Ｓ２から接合点Ａまで編むステップＳＣ４１と、第４ワイヤ４を接合点Ａから第２終点Ｅ２まで編むステップＳＣ４２と、編まれたワイヤ１，３，４を治具４０から取り外すステップＳＣ５と、接合点Ａにおいて第３ワイヤ３の一端と第４ワイヤ４の一端とを相互に接合するステップＳＣ６と、始点Ｓ１，Ｓ２および終点Ｅ１，Ｅ２においてワイヤ１，３，４の端をそれぞれ接合するステップＳＣ７と、を含む。
　ステント３０の製造方法は、第１実施形態において説明したステップＳＡ８，ＳＡ９，ＳＡ１０をさらに含んでいてもよい。 Next, a method for manufacturing the stent 30 will be explained.
As shown in FIG. 13, the method for manufacturing the stent 30 according to the present embodiment includes a step SC1 of preparing a jig 40, a step SC2 of preparing a first wire 1 and a second wire 2, and a step SC2 of preparing a first wire 1 and a second wire 2. 1 from the first starting point S1 to the first end point E1, step SC41 to knit the third wire 3 from the second starting point S2 to the joining point A, and the fourth wire 4 from the joining point A to the second ending point E2. A step SC42 of knitting, a step SC5 of removing the knitted wires 1, 3, and 4 from the jig 40, and a step SC6 of mutually joining one end of the third wire 3 and one end of the fourth wire 4 at the joining point A. , a step SC7 of joining the ends of the wires 1, 3, and 4 at the starting points S1, S2 and the ending points E1, E2, respectively.
The method for manufacturing stent 30 may further include steps SA8, SA9, and SA10 described in the first embodiment.
　ステップＳＣ１において、山部７ａおよび谷部７ｂに対応するシャフト４１の孔にピン４２を挿入し取り付ける。
　ステップＳＣ２において、ステップＳＡ２と同様に、ステント３０の形成に必要な全長Ｌの半分の長さＬ／２をそれぞれ有する第１ワイヤ１および第２ワイヤ２を準備する。ここで、第２ワイヤ２として、第３ワイヤ３と、第４ワイヤ４とを準備する。第３ワイヤ３および第４ワイヤ４は、相互に等しい長さを有していてもよく、相互に異なる長さを有していてもよい。
　ステップＳＣ１とステップＳＣ２の順番は任意である。 In step SC1, pins 42 are inserted and attached to holes in shaft 41 corresponding to peaks 7a and troughs 7b.
In step SC2, similarly to step SA2, the first wire 1 and the second wire 2 each having a length L/2, which is half the total length L necessary for forming the stent 30, are prepared. Here, as the second wire 2, a third wire 3 and a fourth wire 4 are prepared. The third wire 3 and the fourth wire 4 may have mutually equal lengths or may have mutually different lengths.
The order of step SC1 and step SC2 is arbitrary.
　次に、ステップＳＣ３において、第１ワイヤ１を周方向にジグザグに螺旋状に巻きながら、第１ワイヤ１を第１始点Ｓ１から第１終点Ｅ１まで所定の第１経路に沿って編む。
　次に、ステップＳＣ４１において、第３ワイヤ３を周方向にジグザグに螺旋状に巻きながら、第３ワイヤ３を第２始点Ｓ２から接合点Ａまで所定の第２経路に沿って編む。
　次に、ステップＳＣ４２において、第４ワイヤ４を周方向にジグザグに螺旋状に巻きながら、第４ワイヤ４を接合点Ａから第２終点Ｅ２まで所定の第２経路に沿って編む。
　ここで、ステップＳＣ４１，ＳＣ４２は、掛合部７を形成するステップを含む。 Next, in step SC3, the first wire 1 is weaved along a predetermined first path from the first starting point S1 to the first ending point E1 while spirally winding the first wire 1 in a zigzag manner in the circumferential direction.
Next, in step SC41, the third wire 3 is knitted along a predetermined second path from the second starting point S2 to the joining point A while spirally winding the third wire 3 in a zigzag manner in the circumferential direction.
Next, in step SC42, the fourth wire 4 is weaved along a predetermined second path from the joining point A to the second end point E2 while spirally winding the fourth wire 4 in a zigzag manner in the circumferential direction.
Here, steps SC41 and SC42 include a step of forming the engaging portion 7.
　次に、ステップＳＣ５において、ステップＳＡ５と同様に、編まれたワイヤ１，３，４をシャフト４１から取り外す。
　次に、ステップＳＣ６において、ステップＳＡ６と同様に、第３ワイヤ３の一端と第４ワイヤ４の一端とを接合点Ａにおいて相互に接合し、接合部５を形成する。
　また、ステップＳＢ７において、ワイヤ１の両端をワイヤ３，４とそれぞれ接合し、接合部６Ａ，６Ｃを形成する。また、ワイヤ３，４の他端をワイヤ１とそれぞれ接合し、接合部６Ｂ，６Ｄを形成する。 Next, in step SC5, the braided wires 1, 3, and 4 are removed from the shaft 41, similarly to step SA5.
Next, in step SC6, similarly to step SA6, one end of the third wire 3 and one end of the fourth wire 4 are joined to each other at the joining point A to form the joining part 5.
Further, in step SB7, both ends of the wire 1 are joined to the wires 3 and 4, respectively, to form joints 6A and 6C. Further, the other ends of the wires 3 and 4 are joined to the wire 1, respectively, to form joint parts 6B and 6D.
　このように、本実施形態によれば、ステント３０の第２ワイヤ２は２本のワイヤ３，４から構成され、各ワイヤ３，４は、第２ワイヤ２の全長Ｌ／２を分割した長さを有する。したがって、ステップＳＣ４１，ＳＣ４２の掛合部７の形成において、長さＬ／２の１本の第２ワイヤを使用する場合と比較して、引っ張るべきワイヤ３，４の長さが短くなり、ワイヤ３，４を引っ張る工程に要する時間が短縮される。これにより、個々の掛合部７の形成時間を効果的に短縮し、ステント３０の作製時間を効果的に短縮することができる。 As described above, according to the present embodiment, the second wire 2 of the stent 30 is composed of two wires 3 and 4, and each wire 3 and 4 has a length obtained by dividing the entire length L/2 of the second wire 2. It has a certain quality. Therefore, in forming the engaging portion 7 in steps SC41 and SC42, the lengths of the wires 3 and 4 to be pulled are shortened compared to the case where one second wire with a length L/2 is used, and the wire 3 , 4 is shortened. Thereby, it is possible to effectively shorten the time for forming each of the engaging portions 7, and to effectively shorten the time for manufacturing the stent 30.
　本実施形態においても、第１実施形態の第１変形例および第２変形例を適用することができる。
　具体的には、本実施形態の第１変形例において、ステント３０の第２ワイヤ２は、３本以上のワイヤから構成されていてもよい。すなわち、第３ワイヤ３および第４ワイヤ４の少なくとも一方が、相互に接合される２本以上のワイヤを含んでいてもよい。
　本実施形態の第２変形例において、第２ワイヤ２を構成する複数本のワイヤの長さが、相互に異なっていてもよい。例えば、第３ワイヤ３の長さがＬ／３であり、第４ワイヤ４の長さが２Ｌ／３であり、接合点Ａが、ステント３０の中央部から一端３０ａ側に外れた位置であってもよい。 Also in this embodiment, the first modification and the second modification of the first embodiment can be applied.
Specifically, in the first modification of the present embodiment, the second wire 2 of the stent 30 may be composed of three or more wires. That is, at least one of the third wire 3 and the fourth wire 4 may include two or more wires that are joined to each other.
In the second modification of the present embodiment, the lengths of the plurality of wires constituting the second wire 2 may be different from each other. For example, the length of the third wire 3 is L/3, the length of the fourth wire 4 is 2L/3, and the junction point A is located away from the center of the stent 30 toward one end 30a. It's okay.
１０，２０，３０　ステント
１，２，３，４　ワイヤ
５，５Ａ，５Ｂ，６Ａ，６Ｂ，６Ｃ，６Ｄ　接合部
７　掛合部
８　直線交差部
Ａ，Ａ１，Ａ２　接合点
Ｓ／Ｅ　始点（第１地点）
Ｓ　始点（第１地点）
Ｓ１　第１始点（第１地点）
Ｓ２　第２始点（第３地点）
Ｅ　終点（第２地点）
Ｅ１　第１終点（第２地点）
Ｅ２　第２終点（第４地点） 10, 20, 30 Stent 1, 2, 3, 4 Wire 5, 5A, 5B, 6A, 6B, 6C, 6D Joint part 7 Engaging part 8 Straight intersection part A, A1, A2 Junction point S/E Starting point (first point)
S Starting point (first point)
S1 1st starting point (1st point)
S2 2nd starting point (3rd point)
E End point (second point)
E1 1st terminal point (2nd point)
E2 2nd terminal point (4th point)

Claims (19)

  1. 　第１地点からひと続きの経路を通って前記第１地点までワイヤを編むことによって形成されるステントの製造方法であって、
    　第１ワイヤおよび第２ワイヤを準備すること、
    　前記第１地点から接合点まで前記第１ワイヤを編むこと、
    　前記接合点から前記第１地点まで前記第２ワイヤを編むこと、
    　前記第１地点において前記第１ワイヤの一端と前記第２ワイヤの一端とを相互に接合すること、および、
    　前記接合点において前記第１ワイヤの他端と前記第２ワイヤの他端とを相互に接合すること、を含み、
    　前記第１ワイヤおよび前記第２ワイヤが、前記ステントを構成するワイヤの全長を２つに分割した長さを有する、ステントの製造方法。     A method of manufacturing a stent formed by weaving a wire from a first point through a continuous path to the first point, the method comprising:
    providing a first wire and a second wire;
    braiding the first wire from the first point to a junction point;
    braiding the second wire from the junction point to the first point;
    joining one end of the first wire and one end of the second wire to each other at the first point; and
    joining the other end of the first wire and the other end of the second wire to each other at the joining point,
    A method for manufacturing a stent, wherein the first wire and the second wire have a length that is obtained by dividing the total length of the wires constituting the stent into two.
  2. 　第１地点から第２地点までひと続きの経路を通ってワイヤを編むことによって形成されるステントの製造方法であって、
    　第１ワイヤおよび第２ワイヤを準備すること、
    　前記第１地点から前記第１地点と前記第２地点との間の接合点まで前記第１ワイヤを編むこと、
    　前記接合点から前記第２地点まで前記第２ワイヤを編むこと、および、
    　前記接合点において前記第１ワイヤの一端と前記第２ワイヤの一端とを相互に接合すること、を含み、
    　前記第１ワイヤおよび前記第２ワイヤが、前記ステントを構成するワイヤの全長を２つに分割した長さを有する、ステントの製造方法。     A method of manufacturing a stent formed by weaving a wire through a continuous path from a first point to a second point, the method comprising:
    providing a first wire and a second wire;
    braiding the first wire from the first point to a junction between the first point and the second point;
    braiding the second wire from the junction point to the second point; and
    joining one end of the first wire and one end of the second wire to each other at the joining point,
    A method for manufacturing a stent, wherein the first wire and the second wire have a length that is obtained by dividing the total length of the wires constituting the stent into two.
  3. 　第１地点から第２地点までひと続きの第１経路を通ってワイヤを編み、前記第１地点の近傍の第３地点から前記第２地点の近傍の第４地点までひと続きの第２経路を通って他のワイヤを編むことによって形成されるステントの製造方法であって、
    　第１ワイヤおよび第２ワイヤを準備し、前記第２ワイヤが第３ワイヤおよび第４ワイヤを含む、こと、
    　前記第１地点から前記第２地点まで前記第１ワイヤを編むこと、
    　前記第３地点から前記第３地点と前記第４地点との間の接合点まで前記第３ワイヤを編むこと、
    　前記接合点から前記第４地点まで前記第４ワイヤを編むこと、および、
    　前記接合点において、前記第３ワイヤの一端と前記第４ワイヤの一端とを相互に接合すること、を含み、
    　前記第３ワイヤおよび前記第４ワイヤが、前記ステントを構成するワイヤの全長の半分を２つに分割した長さを有する、ステントの製造方法。     A wire is woven along a continuous first path from a first point to a second point, and a continuous second path is woven from a third point near the first point to a fourth point near the second point. A method of manufacturing a stent formed by weaving other wires through the
    providing a first wire and a second wire, the second wire including a third wire and a fourth wire;
    braiding the first wire from the first point to the second point;
    braiding the third wire from the third point to a junction between the third point and the fourth point;
    braiding the fourth wire from the junction point to the fourth point; and
    joining one end of the third wire and one end of the fourth wire to each other at the joining point,
    The method for manufacturing a stent, wherein the third wire and the fourth wire have a length that is half of the total length of the wires constituting the stent.
  4. 　前記編むことが、前記ワイヤの２つの部分が相互に引っ掛かる掛合部を形成することを含む、請求項１から請求項３のいずれかに記載のステントの製造方法。 The method for manufacturing a stent according to any one of claims 1 to 3, wherein the weaving includes forming a hook portion in which the two portions of the wire are hooked to each other.
  5. 　前記接合点が、前記ステントの長手方向における中央部から外れた位置に配置される、請求項１から請求項３のいずれかに記載のステントの製造方法。 The method for manufacturing a stent according to any one of claims 1 to 3, wherein the junction point is located at a position away from the center in the longitudinal direction of the stent.
  6. 　前記接合点が、掛合部および直線交差部以外の位置であり、
    　前記掛合部において、前記ワイヤの２つの部分が相互に引っ掛かり合い、
    　前記直線交差部において、前記ワイヤの２つの直線部分が相互に交差する、請求項１から請求項３のいずれかに記載のステントの製造方法。     The junction point is at a position other than a hooking part and a straight intersection part,
    In the hooking portion, the two portions of the wire are hooked to each other,
    4. The method for manufacturing a stent according to claim 1, wherein the two straight portions of the wire intersect with each other at the straight line intersection.
  7. 　前記第１地点が、前記ステントの長手方向における中央部から外れた位置に配置される、請求項１に記載のステントの製造方法。 The method for manufacturing a stent according to claim 1, wherein the first point is located at a position away from the center in the longitudinal direction of the stent.
  8. 　前記第１ワイヤおよび前記第２ワイヤが、相互に等しい長さを有する、請求項１または請求項２に記載のステントの製造方法。 The method for manufacturing a stent according to claim 1 or 2, wherein the first wire and the second wire have mutually equal lengths.
  9. 　前記第１ワイヤおよび前記第２ワイヤが、相互に異なる長さを有する、請求項１または請求項２に記載のステントの製造方法。 The method for manufacturing a stent according to claim 1 or 2, wherein the first wire and the second wire have mutually different lengths.
  10. 　前記第３ワイヤおよび前記第４ワイヤが、相互に等しい長さを有する、請求項３に記載のステントの製造方法。 The method for manufacturing a stent according to claim 3, wherein the third wire and the fourth wire have mutually equal lengths.
  11. 　前記第３ワイヤおよび前記第４ワイヤが、相互に異なる長さを有する、請求項３に記載のステントの製造方法。 The method for manufacturing a stent according to claim 3, wherein the third wire and the fourth wire have different lengths.
  12. 　前記接合することが、かしめ、溶接、密着巻き、またはＸ線視認性マーカを用いて行われる、請求項１から請求項３のいずれかに記載のステントの製造方法。 The method for manufacturing a stent according to any one of claims 1 to 3, wherein the joining is performed by caulking, welding, close winding, or using an X-ray visible marker.
  13. 　前記第１ワイヤおよび前記第２ワイヤの少なくとも一方が、２本以上のワイヤを含む、請求項１または請求項２に記載のステントの製造方法。 The method for manufacturing a stent according to claim 1 or 2, wherein at least one of the first wire and the second wire includes two or more wires.
  14. 　第１地点からひと続きの経路を通って前記第１地点まで編まれたワイヤから形成されるステントであって、
    　前記第１地点から接合点まで編まれた第１ワイヤと、
    　前記接合点から前記第１地点まで編まれた第２ワイヤと、
    　前記第１地点に形成され、前記第１ワイヤの一端と前記第２ワイヤの一端とが相互に接合された接合部と、
    　前記接合点に形成され、前記第１ワイヤの他端と前記第２ワイヤの他端とが相互に接合された第２接合部と、を備えるステント。     A stent formed from a wire woven from a first point through a continuous path to the first point, the stent comprising:
    a first wire woven from the first point to a junction point;
    a second wire woven from the junction point to the first point;
    a joint formed at the first point and where one end of the first wire and one end of the second wire are joined to each other;
    A stent comprising: a second joint part formed at the junction point and in which the other end of the first wire and the other end of the second wire are joined to each other.
  15. 　前記第１地点から前記接合点まで前記第１ワイヤを編み、
    　前記接合点から前記第１地点まで前記第２ワイヤを編み、
    　前記第１地点において前記第１ワイヤの一端と前記第２ワイヤの一端とを相互に接合し、
    　前記接合点において前記第１ワイヤの他端と前記第２ワイヤの他端とを相互に接合することによって製造された、請求項１４に記載のステント。     braiding the first wire from the first point to the bonding point;
    braiding the second wire from the junction point to the first point;
    one end of the first wire and one end of the second wire are joined to each other at the first point;
    15. The stent of claim 14, manufactured by joining the other end of the first wire and the other end of the second wire to each other at the junction.
  16. 　第１地点から第２地点までひと続きの経路を通って編まれたワイヤから形成されるステントであって、
    　前記第１地点から前記第１地点と前記第２地点との間の接合点まで編まれた第１ワイヤと、
    　前記接合点から前記第２地点まで編まれた第２ワイヤと、
    　前記接合点に形成され、前記第１ワイヤの一端と前記第２ワイヤの一端とが相互に接合された接合部と、を備えるステント。     A stent formed from wire woven through a continuous path from a first point to a second point, the stent comprising:
    a first wire braided from the first point to a junction between the first point and the second point;
    a second wire woven from the junction point to the second point;
    A stent comprising: a joint part formed at the junction point, where one end of the first wire and one end of the second wire are joined to each other.
  17. 　前記第１地点から前記接合点まで前記第１ワイヤを編み、
    　前記接合点から前記第２地点まで前記第２ワイヤを編み、
    　前記接合点において前記第１ワイヤの一端と前記第２ワイヤの一端とを相互に接合することによって製造された、請求項１６に記載のステント。     braiding the first wire from the first point to the bonding point;
    braiding the second wire from the junction point to the second point;
    17. The stent of claim 16, manufactured by joining one end of the first wire and one end of the second wire together at the junction.
  18. 　第１地点から第２地点までひと続きの第１経路を通って編まれたワイヤと、前記第１地点の近傍の第３地点から前記第２地点の近傍の第４地点までひと続きの第２経路を通って編まれた他のワイヤとから形成されるステントであって、
    　前記第１地点から前記第２地点まで編まれた第１ワイヤと、
    　前記第３地点から前記第３地点と前記第４地点との間の接合点まで編まれた第３ワイヤと、
    　前記接合点から前記第４地点まで編まれた第４ワイヤと、
    　前記接合点に形成され、前記第３ワイヤの一端と前記第４ワイヤの一端とが相互に接合された接合部と、を備えるステント。     A wire woven through a continuous first path from a first point to a second point, and a second continuous wire woven from a third point near the first point to a fourth point near the second point. and other wires woven through a pathway, the stent comprising:
    a first wire woven from the first point to the second point;
    a third wire braided from the third point to a junction between the third point and the fourth point;
    a fourth wire woven from the junction point to the fourth point;
    A stent comprising: a joint part formed at the junction point, where one end of the third wire and one end of the fourth wire are joined to each other.
  19. 　前記第１地点から前記第２地点まで前記第１ワイヤを編み、
    　前記第３地点から前記接合点まで前記第３ワイヤを編み、
    　前記接合点から前記第４地点まで前記第４ワイヤを編み、
    　前記接合点において前記第３ワイヤの一端と前記第４ワイヤの一端とを相互に接合することによって製造された、請求項１８に記載のステント。     knitting the first wire from the first point to the second point;
    braiding the third wire from the third point to the junction point;
    braiding the fourth wire from the junction point to the fourth point;
    19. The stent of claim 18, manufactured by joining one end of the third wire and one end of the fourth wire together at the junction.
PCT/JP2022/018008 2022-04-18 2022-04-18 Stent production method and stent WO2023203596A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100016930A (en) * 2008-08-05 2010-02-16 주식회사 엠아이텍 Stent
JP2018505720A (en) * 2015-01-12 2018-03-01 マイクロベンション インコーポレイテッド Stent
JP2020508795A (en) * 2017-03-06 2020-03-26 カーディバスキュラー・ラブ・ソチエタ・ペル・アツィオーニ・オ・ブレヴェメンテ・シーブイ・ラブ・ソチエタ・ペル・アツィオーニＣＡＲＤＩＯＶＡＳＣＵＬＡＲ ＬＡＢ Ｓ．Ｐ．Ａ． ｏ ｂｒｅｖｅｍｅｎｔｅ ＣＶ ＬＡＢ Ｓ．Ｐ．Ａ． Multi-layer endoluminal prosthesis assembly and method of manufacture

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100016930A (en) * 2008-08-05 2010-02-16 주식회사 엠아이텍 Stent
JP2018505720A (en) * 2015-01-12 2018-03-01 マイクロベンション インコーポレイテッド Stent
JP2020508795A (en) * 2017-03-06 2020-03-26 カーディバスキュラー・ラブ・ソチエタ・ペル・アツィオーニ・オ・ブレヴェメンテ・シーブイ・ラブ・ソチエタ・ペル・アツィオーニＣＡＲＤＩＯＶＡＳＣＵＬＡＲ ＬＡＢ Ｓ．Ｐ．Ａ． ｏ ｂｒｅｖｅｍｅｎｔｅ ＣＶ ＬＡＢ Ｓ．Ｐ．Ａ． Multi-layer endoluminal prosthesis assembly and method of manufacture

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