A braided scaffold for digestive organs adapted to intestinal peristalsis and its braiding method

Abstract

This invention discloses a woven scaffold for digestive organs adapted to intestinal peristalsis and its weaving method. The scaffold is woven from several main filaments and several auxiliary filaments on a fixture with protruding pins, forming a first end, a second end, and several main body segments between the first and second ends. The main filaments are woven into the end or main body segments to form a columnar scaffold. The auxiliary filaments are wound from top to bottom around the columnar scaffold formed by the main filaments. The total number of main filaments and auxiliary filaments is not greater than the number of protruding pins in the circumferential direction of the fixture. The tail portion of the main filaments is wound parallel to the auxiliary filaments. This invention uses multiple main filaments to form a columnar scaffold, avoiding the problem of easy breakage when weaving with a single main filament. Furthermore, the use of auxiliary filaments wound around the outer circumference of the main filaments improves the radial support force of the scaffold, making it more adaptable to the variability of the intestine and extending its service life.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a woven scaffold for digestive organs adapted to intestinal peristalsis and its weaving method. Background Technology

[0002] Existing braided stents for digestive organs typically use a maximum of three threads: one in the middle and one at each end. This method is prone to thread breakage during weaving, increasing the difficulty for weavers. Furthermore, due to the irregular peristalsis of the intestines, the braided stent must withstand significant radial forces as the intestines deform. Current braided stents suffer from insufficient radial support, resulting in a shorter lifespan. Therefore, a braided stent for digestive organs is needed that reduces weaving difficulty, adapts to intestinal peristalsis, and provides effective radial support. Summary of the Invention

[0003] To address the technical problems of high weaving difficulty and insufficient radial support in existing digestive organ braided stents, this invention provides a digestive organ braided stent adapted to intestinal peristalsis and its weaving method to solve the above problems.

[0004] This invention proposes a woven scaffold for digestive organs adapted to intestinal peristalsis. The scaffold is woven from several main filaments and several auxiliary filaments on a fixture with protruding pins, forming a first end, a second end, and several main body segments between the first and second ends. The main filaments are woven into the end or main body segments to form a columnar scaffold. The auxiliary filaments are wound from top to bottom on the columnar scaffold formed by the main filaments. The total number of main filaments and auxiliary filaments is not greater than the number of protruding pins in the circumferential direction of the fixture. The tail portion of the main filaments is wound parallel to the auxiliary filaments.

[0005] Furthermore, the main filament includes a first main filament, a second main filament, and a third main filament, and five auxiliary filaments are provided. The first and third main filaments are each woven with a head end and 2 to 4 main body segments; the second main filament is woven with 6 to 8 main body segments.

[0006] Furthermore, there are connecting sections between the head end and the main body segment, as well as between two adjacent main body segments. The head end and the main body segment are woven into a diamond-shaped mesh structure. The connecting sections are formed by the straight extension of the silk threads and are used to connect the upper and lower diamond-shaped mesh structures.

[0007] Furthermore, the axial length of the connecting segment is less than the axial length of the main body segment and the head end.

[0008] Furthermore, the axial length of the first head end and the second head end is greater than the axial length of the main body segment.

[0009] This invention also proposes a scaffold weaving method, which is used to weave the digestive organ scaffold adapted to intestinal peristalsis as described above, including the following steps:

[0010] S11: After leaving an end section at one end of the first main yarn, begin weaving part of the main body section, and leave a finishing section at the other end.

[0011] S12: The second main filament starts from the first end and winds around to the weaving position of the first main filament. Then, continue weaving the main body section and leave the tail section. Continue weaving several main body sections in this way.

[0012] S13: The last main yarn starts from the first end and winds around to the completed main body section, then continues to weave the remaining main body section and the second end, leaving a finishing section.

[0013] S14: The first end of the first main yarn is woven.

[0014] S15: Several secondary filaments are spirally wound from the first end to the second end, and the tail section of each main filament is spirally wound towards the second end.

[0015] This invention also proposes a scaffold weaving method, which is used to weave the digestive organ scaffold adapted to intestinal peristalsis as described above, including the following steps:

[0016] S21: Protruding pins are arranged in a circumferential array on the fixture.

[0017] S22: One end of the first main yarn is reserved as an end section, and the first winding starting point is selected at one end of the axial direction of the fixture; the winding angle span corresponding to the cross weaving cycle extends to the bottom of the first end.

[0018] S23: The first main yarn continues to extend obliquely to the top of the first main body segment, and the first main body segment begins to be woven; a connecting segment is formed between the bottom of the first end and the top of the first main body segment.

[0019] S24: The first main yarn continues to extend obliquely to the top of the second main section, and the second main section begins to be woven; a connecting section is formed between the bottom of the first main section and the top of the second main section; and a finishing section is left at the bottom of the second main section.

[0020] S25: The second main wire selects a second winding starting point that is parallel to and does not overlap with the first winding starting point on the fixture, and extends along the winding angle span corresponding to the cross weaving cycle to the bottom of the second main body segment; six main body segments are woven in the same way as in step S24, and a finishing segment is left at the bottom of the eighth main body segment.

[0021] S26: The third main wire selects a third winding starting point that is parallel to and does not overlap with the first and second winding starting points on the fixture, and extends along the winding angle span corresponding to the cross weaving cycle to the bottom of the eighth main segment; the two main segments are woven in the same way as the first main wire.

[0022] S27: After a connecting section, weave the second end and leave the finishing section.

[0023] S28: Weave the first head end using the end section of the first main yarn.

[0024] S29: Spiral wind the finishing sections of the first main filament, the second main filament, and the third main filament along the weaving route; select other protruding pins on the fixture that are parallel to and do not overlap with the first winding starting point, the second winding starting point, and the third winding starting point as the winding starting point of the five auxiliary filaments, and wind them from the first end to the second end along a winding route parallel to the finishing section.

[0025] Furthermore, the cross-weaving cycle of the first and second ends is 11, and the cross-weaving cycle of the main body segment is 5.

[0026] Furthermore, as the main wire passes through the two protruding pins in sequence, it makes tangential contact with the opposite sides of the two adjacent protruding pins.

[0027] Furthermore, sixteen protruding pins are evenly distributed on the same circumferential surface of the fixture; there is one protruding pin between adjacent winding starting points.

[0028] The beneficial effects of this invention are:

[0029] (1) The present invention uses multiple main filaments to form a columnar support, which avoids the phenomenon that the main filament is easy to break when it is woven with a single main filament. In addition, auxiliary filaments are wrapped around the outer periphery of the main filament, thereby improving the radial support force of the support and making the support more adaptable to the variability of the intestine and improving the service life of the support.

[0030] (2) The present invention provides a connecting section between adjacent braided sections. The connecting section does not have a braided structure, so it is more likely to deform. Moreover, the deformation has less impact on the human body. It can play a buffering role during esophageal peristalsis and reduce the stress response of the human body to the deformation of the stent. Attached Figure Description

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0032] Figure 1 This is a front view of the digestive organ braided scaffold adapted to intestinal peristalsis described in this invention;

[0033] Figure 2 yes Figure 1 Enlarged view of point a in the middle;

[0034] Figure 3 yes Figure 1 Enlarged view at point b in the middle;

[0035] Figure 4 yes Figure 1 Enlarged view at point d;

[0036] Figure 5 yes Figure 1 Enlarged view at point e in the middle;

[0037] Figure 6 This is a winding route diagram for step S22 in the weaving method described in this invention;

[0038] Figure 7 This is a winding route diagram for step S23 in the weaving method described in this invention;

[0039] Figure 8 This is a diagram illustrating the cross-knitting cycle;

[0040] Figure 9 This is a winding route diagram for step S24 in the weaving method described in this invention;

[0041] Figure 10 This is the winding route diagram for the second main wire;

[0042] Figure 11 This is a schematic diagram of the support structure after step S25 is completed;

[0043] Figure 12 This is the winding route diagram for the third main wire;

[0044] Figure 13 This is a schematic diagram of the support structure after step S27 (the middle part is omitted).

[0045] Figure 14 It is the winding route diagram of the first end of the weaving process;

[0046] Figure 15 It is a route diagram for the winding of the secondary filament and the final winding of the main filament.

[0047] In the diagram, 1. protruding pin, 2. first end, 3. second end, 4. main body section, 5. first main wire, 6. second main wire, 7. third main wire, 8. auxiliary wire, 9. connecting section, 10. end section, 11. finishing section, 12. first winding start point, 13. second winding start point, 14. third winding start point, 15. developing mark. Detailed Implementation

[0048] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0049] like Figures 1-6 As shown, a digestive organ braided scaffold adapted to intestinal peristalsis is provided. The scaffold is formed by weaving several main wires and several auxiliary wires 8 on a fixture with protruding pins 1, and has a first end 2, a second end 3 and several main body segments 4 located between the first end 2 and the second end 3 in its shape. The first end 2 and the second end 3 are located at both ends of the scaffold.

[0050] Several main filaments are woven together at the head end or main body segment 4 to form a columnar support. Multiple main filaments are used for weaving, and the axial length of each main filament can be reduced to avoid breakage during the weaving process. The auxiliary filaments 8 are wound from top to bottom on the columnar support formed by the main filaments, which can improve the radial support force of the support. The total number of main filaments and auxiliary filaments 8 is not greater than the number of protruding pins 1 in the circumferential direction of the fixture tooling. This can avoid the main filaments and auxiliary filaments 8 from overlapping and interfering with each other at the starting end of the weaving. The tail end of the main filaments is wound parallel to the auxiliary filaments 8.

[0051] In a specific embodiment of the present invention, there are three main filaments and five auxiliary filaments 8. The main filaments include a first main filament 5, a second main filament 6 and a third main filament 7. There are five auxiliary filaments 8. The first main filament 5 and the third main filament 7 are each woven with a head end and 2 to 4 main body segments 4. The second main filament 6 is woven with 6 to 8 main body segments 4.

[0052] In a further design, a connecting segment 9 is provided between the head end and the main body segment 4, as well as between two adjacent main body segments 4. The head end and the main body segment 4 are woven into a diamond-shaped mesh structure. The connecting segment 9 is formed by the straight extension of silk threads and is used to connect the upper and lower diamond-shaped mesh structures. The connecting segment 9 mainly connects the head end and the main body segment 4, or the main body segment 4 to the main body segment 4. It does not need to be woven. The connecting segment 9 can play a buffering role. Since esophageal peristalsis will generate contact stimulation, the stress response of the human body to the foreign object such as the stent will be smaller after the buffering effect of the connecting segment 9. The axial length of the connecting segment 9 is preferably less than the axial length of the main body segment 4 and the head end.

[0053] The axial length of the first end 2 and the second end 3 is greater than the axial length of the main body segment 4.

[0054] This invention also proposes a scaffold weaving method, which is used to weave the digestive organ scaffold adapted to intestinal peristalsis as described above, including the following steps:

[0055] S11: After leaving the end section 10 at one end of the first main yarn, we begin weaving the main body section 4, and leave the end section 11 at the other end.

[0056] S12: The second main filament starts from the first end 2 and winds to the weaving position of the first main filament. Then, it continues to weave the main body section 4 and leaves the tail section 11. Several main body sections 4 are woven in this way.

[0057] S13: After the last main filament is wound from the first end 2 to the completed main body section 4, continue weaving the remaining main body section 4 and the second end 3, leaving the finishing section 11.

[0058] S14: The end section 10 of the first main yarn is woven into the first head end 2.

[0059] S15: Several secondary filaments 8 are spirally wound from the first end 2 to the second end 3, and the tail section 11 of each main filament is spirally wound from the second end 3.

[0060] Unlike traditional weaving methods, the protruding pins 1 on the fixture used to weave the bracket described in this invention are not evenly distributed in the axial direction. That is, the axial length of each weaving segment is different. The two end segments have the longest axial length, which facilitates diameter expansion and provides better anti-displacement function. The connecting segment 9 has the shortest axial length, which ensures the overall structural strength of the bracket.

[0061] The following describes in detail the weaving process of a support structure with ten main segments and two end segments, using three main wires and five auxiliary wires:

[0062] S21: As Figure 6 As shown, sixteen protruding pins 1 are arranged in a circular array on the fixture. The distance between the protruding pins 1 in the axial direction is not equal, that is, the circumferential dividing lines of the fixture are equidistantly distributed, while the axial dividing lines are not equidistantly distributed.

[0063] S22: One end of the first main wire 5 is reserved with an end section 10, with a reserved length of approximately 1.6m, and the first winding starting point 12 is selected at one axial end of the fixture (e.g., Figure 6 (As shown); the winding angle span corresponding to the cross weaving cycle extends to the bottom of the first end 2. The cross weaving cycle refers to weaving in a cross weaving manner (along a Z-shaped weaving, the cross weaving pattern is as follows). Figure 4 As shown, the thread passes from the bottom of the first end 2, around the top of the first end 2, and then back down to the bottom of the first end 2. The number of protruding pins 1 that the thread crosses during this process is as follows: Figure 8 As shown, the cross weaving cycle of the first main yarn 5 at the first end 2 is 11.

[0064] S23: The first main yarn 5 continues to extend obliquely to the top of the first main body segment 4, beginning the weaving of the first main body segment 4; a connecting segment 9 is formed between the bottom of the first end 2 and the top of the first main body segment 4. During the weaving process, the main yarn makes tangential contact with the opposite sides of the two adjacent protruding pins 1 as it passes through them in sequence. Figure 7 As shown, the first main wire 5 is tangent to the right side of the protruding pin 1 at the top of the connecting section 9, and tangent to the left side of the protruding pin 1 at the bottom of the connecting section 9.

[0065] S24: As Figure 9 As shown, the first main yarn 5 continues to extend obliquely to the top of the second main body segment 4 and begins to weave the second main body segment 4; a connecting segment 9 is formed between the bottom of the first main body segment 4 and the top of the second main body segment 4; and a finishing segment 11 is left at the bottom of the second main body segment 4. The cross weaving cycle of the first main yarn 5 in the main body segment 4 is 5.

[0066] S25: As Figure 10 As shown, the second main wire 6 selects a second winding starting point 13 on the fixture, parallel to but not overlapping with the first winding starting point 12. A protruding pin 1 separates the second winding starting point 13 from the first winding point. The winding starts along the cross weaving cycle, spanning the corresponding winding angle, to the bottom of the second main body segment 4. The weaving cycle at the first end 2 is 11, and the weaving cycle in the main body segment 4 is 5. Six main body segments 4 are woven in the same manner as in step S24, and a finishing section 11 is left at the bottom of the eighth main body segment 4. The finishing section 11 is approximately 0.4m long. The structure after weaving is as follows. Figure 11 As shown.

[0067] S26: As Figure 12 As shown, the third main wire 7 selects a third winding starting point 14 on the fixture, which is parallel to and does not overlap with the first winding starting point 12 and the second winding starting point 13. The third winding starting point 14 is separated from the second winding point by a protruding pin 1. It extends along the winding angle span corresponding to the cross weaving cycle to the bottom of the eighth main body segment 4, the same as the first main wire 5 and the third main wire 7. The weaving cycle of the third main wire 7 at the first end 2 is 11, and the weaving cycle at the main body segment 4 is 5. The two main body segments 4 are woven in the same way as the first main wire 5.

[0068] S27: As Figure 12 As shown, after a connecting section 9, the second end 3 is woven, leaving a finishing section 11, approximately 0.5m in length. The structure after weaving is as follows. Figure 13 As shown.

[0069] S28: After flipping the fixture so that the first end 2 faces downwards, braid the first end 2 using the end section 10 of the first main yarn 5. The structure after braiding is as follows. Figure 14As shown.

[0070] S29: The finishing sections 11 of the first main yarn 5, the second main yarn 6, and the third main yarn 7 are spirally wound along the braiding path; on the fixture, other protruding pins 1 that are parallel to but do not overlap with the first winding starting point 12, the second winding starting point 13, and the third winding starting point 14 are selected as the winding starting points of the five auxiliary yarns 8, with a protruding pin 1 spaced apart between adjacent winding starting points, and wound from the first end 2 to the second end 3 along a winding path parallel to the finishing section 11 (e.g., ...). Figure 15 (As shown). The spiral winding method of the silk thread is as follows: Figure 5 As shown, the threads not only spirally wind along the shape of the support frame, but also need to be wound around the already braided threads during the winding process. The final winding method for the threads is as follows. Figure 3 As shown.

[0071] The braided support typically requires platinum-iridium developing marks 15, and this invention arranges multiple developing marks 15 at both ends and each main body segment 4 (e.g. Figure 3 As shown in the figure, to avoid forgetting to load, it is preferable to mark the loading mark on the corresponding position of the protruding pin 1 of the fixture tooling.

[0072] In the description of this invention, it should be understood that the terms "upper", "lower", "axial", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0073] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, unless otherwise stated, "a number" means two or more.

[0074] In this specification, the illustrative expressions of the terms do not necessarily refer to the same embodiments. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments.

[0075] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A stent weaving method, characterized by: The weaving method is used for weaving the following digestive organ woven stents adapting to intestinal peristalsis, the stents are formed by weaving on a clamp tool with protruding pins (1) by using a plurality of main wires and a plurality of auxiliary wires (8), and first head end (2), second head end (3) and a plurality of body sections (4) between the first head end (2) and the second head end (3) are formed on the outer shape; The plurality of main wires respectively weave the head end or the body section (4) to form a columnar stent together, and the auxiliary wires (8) are wound from top to bottom on the basis of the columnar stent formed by the main wires; The total number of the main wires and the auxiliary wires (8) is not more than the number of the protruding pins (1) in the circumferential direction of the clamp tool, and the end part of the main wire is wound in parallel with the auxiliary wire (8); The main wires include first main wire (5), second main wire (6) and third main wire (7), and the auxiliary wire (8) is provided with five, the first main wire (5) and the third main wire (7) are woven with one head end and 2-4 body sections (4); the second main wire (6) is woven with 6-8 body sections (4); The weaving method includes the following steps: S21: arranging the protruding pins (1) in the circumferential array on the clamp tool; S22: reserving an end section (10) at one end of the first main wire (5), and selecting a first winding starting point (12) at one end of the clamp tool in the axial direction; the winding angle span corresponding to the cross weaving period to the bottom of the first head end (2); S23: the first main wire (5) continues to extend obliquely to the top of the first body section (4), and starts to weave the first body section (4); a connecting section (9) is formed between the bottom of the first head end (2) and the top of the first body section (4); S24: the first main wire (5) continues to extend obliquely to the top of the second body section (4), and starts to weave the second body section (4); a connecting section (9) is formed between the bottom of the first body section (4) and the top of the second body section (4); and a tail section (11) is left at the bottom of the second body section (4); S25: the second main wire (6) selects a second winding starting point (13) on the clamp tool which is side by side with the first winding starting point (12) and does not coincide, and the winding angle span corresponding to the cross weaving period to the bottom of the second body section (4); six body sections (4) are woven in the same way as step S24, and a tail section (11) is left at the bottom of the eighth body section (4); S26: the third main wire (7) selects a third winding starting point (14) on the clamp tool which is side by side with the first winding starting point (12) and the second winding starting point (13) and does not coincide, and the winding angle span corresponding to the cross weaving period to the bottom of the eighth body section (4); two body sections (4) are woven in the same way as the first main wire (5); S27: after one connecting section (9), the second head end (3) is woven, and a tail section (11) is left; S28: the first head end (2) is woven by the end section (10) of the first main wire (5); S29: the end section (11) of the first main wire (5), the second main wire (6) and the third main wire (7) is spirally wound along the weaving route; on the fixture tool, other protruding pins (1) which are parallel to the first winding starting point (12), the second winding starting point (13) and the third winding starting point (14) and do not coincide are selected as the winding starting points of the five auxiliary wires (8), and are wound from the first head end (2) to the second head end (3) along the winding route parallel to the end section (11).

2. The stent braiding method of claim 1, wherein: The head end and the body section (4) have a connecting section (9) between them, and between two adjacent body sections (4), and the head end and the body section (4) are woven into a diamond mesh structure. The connecting section (9) is formed by the straight extension of the wire, and is used to connect the upper and lower diamond mesh structures.

3. The stent braiding method of claim 2, wherein: The axial length of the connecting section (9) is less than the axial length of the body section (4) and the head end.

4. The stent braiding method of claim 1, wherein: The axial length of the first head end (2) and the second head end (3) is greater than the axial length of the body section (4).

5. The stent braiding method of claim 1, wherein: The cross-weaving period of the first head end (2) and the second head end (3) is 11, and the cross-weaving period of the body section (4) is 5.

6. The stent braiding method of claim 1, wherein: The main wire is tangent to the opposite sides of the two adjacent protruding pins (1) when passing through the two protruding pins (1) in sequence.

7. The stent braiding method of claim 1, wherein: There are sixteen protruding pins (1) circumferentially distributed on the same circumferential surface of the fixture tool; there is one protruding pin (1) between adjacent winding starting points.

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