CN115737894A - Medical suture with negative Poisson ratio effect - Google Patents
Medical suture with negative Poisson ratio effect Download PDFInfo
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- CN115737894A CN115737894A CN202211539864.1A CN202211539864A CN115737894A CN 115737894 A CN115737894 A CN 115737894A CN 202211539864 A CN202211539864 A CN 202211539864A CN 115737894 A CN115737894 A CN 115737894A
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- medical suture
- negative poisson
- ratio effect
- suture
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Abstract
The application relates to a medical suture with a negative Poisson ratio effect, and relates to the field of biomedical materials. The medical suture with the negative Poisson ratio effect is formed by weaving through a knitting and weaving process, and has a mesh structure with the negative Poisson ratio effect, and the mesh structure with the negative Poisson ratio effect comprises a plurality of coils which are sequentially connected; the medical suture is in a flat belt shape or a hollow column shape. The problem of current medical suture because axial load, its certain structure shrink phenomenon still can appear in the tensile process, leads to the cross sectional area of suture to reduce, stress concentration, still can cause the cutting to the tissue in the follow-up draft process is solved.
Description
Technical Field
The application relates to the technical field of biomedical materials, in particular to a medical suture with a negative Poisson ratio effect.
Background
The medical suture is one of the most commonly used medical consumables and is widely applied to suture of wounds, involution of tissues, ligation and anastomosis of cavity tubes, fixation of joints and implants, wound surface and ligament repair and the like. Conventional sutures are generally cylindrical in structure and are very thin, which can cause the suture to cut through other intact tissues like a sharp steel saw under traction, resulting in problems of tissue dehiscence, hernia formation and tendon dysfunction. And the knotted nodules of the traditional suture are large in size compared with the diameter of the traditional suture. While related inventions have been presented for mesh sutures (e.g., CN107405145 a), which improve the biocompatibility of the suture, the mesh allows for tissue integration after introduction into the body, as the structure of the mesh allows for lateral loading of the suture by the tissue. However, in actual use, due to the axial load, a certain structural contraction phenomenon still occurs during the stretching process, the cross-sectional area of the suture thread is reduced, stress concentration is caused, and the cutting of the tissue is still caused during the subsequent stretching process.
In order to slow down the cutting of the suture to the tissue in the using process and improve the biocompatibility of the suture, the invention provides the suture with the negative Poisson ratio effect. Conventional sutures tend to shrink in the transverse direction (in cross-section) during stretching, which can exacerbate the cutting of tissue, due to loading of the suture in the axial direction during use. Whereas sutures with a negative poisson's ratio effect will expand somewhat in the transverse direction (along the cross-sectional direction) when stretched in the axial direction, avoiding cutting of tissue by stretching it too thin in diameter. At the same time, the mesh on the suture wall allows the tissue to grow in during the wound healing phase, better fusion between the tissue and the suture, minimizing the formation of gaps between the tissue and the suture, allowing tissue ingrowth and implant incorporation. Its larger surface area may also reduce force concentration, may flatten out inside the tissue as it is squeezed to better balance the distribution of force between the sutured tissues, and the mesh structure makes the suture easier to handle, use and knot, may collapse when knotted, and is smaller than its oversized diameter.
Disclosure of Invention
The application aims to provide a medical suture with a negative Poisson ratio effect, and the medical suture is used for solving the problems that the cross section area of the suture is reduced, stress is concentrated and the tissue is cut in the subsequent drawing process because the conventional medical suture still has a certain structural shrinkage phenomenon in the drawing process due to axial load.
In order to achieve the purpose, the technical scheme adopted by the application is as follows:
a medical suture with a negative Poisson ratio effect is formed by weaving through a knitting and weaving process, the medical suture has a negative Poisson ratio effect mesh structure, and the negative Poisson ratio effect mesh structure comprises a plurality of coils which are connected in sequence;
the medical suture is in a flat belt shape or a hollow column shape.
In one possible implementation, the yarn material used for the medical suture comprises one or more of natural materials or synthetic materials.
In one possible implementation manner, the medical suture is formed by weaving in a knitting process, and includes: the warp knitting forming or the weft knitting forming is adopted.
In one possible implementation, the medical suture is knitted using a double needle bed raschel knitting machine having six and more bars.
In one possible implementation, the medical suture comprises a front piece and a back piece, and the front piece and the back piece are connected into a whole through a left connection part and a right connection part; the front piece and the back piece are single-side woven regions, and the left connecting part and the right connecting part are double-side woven regions.
In one possible implementation, the negative poisson's ratio effect mesh structure includes at least one or more combinations of varying warp flat, varying chaining, and varying weft insertion; when the yarns are used for weaving the front piece and the rear piece in a single-side weaving area, the yarns are padded only in the front needle bed and the rear needle bed to form loops; when the yarns weave the connecting parts of the left connecting part and the right connecting part in the double-sided weaving area, the yarns are padded with yarns at the front needle bed and the rear needle bed simultaneously to form loops.
In one possible implementation mode, the medical suture adopts a yarn material of polypropylene fibers, and the negative poisson's ratio effect mesh structure comprises a variable warp and weft insertion; and after the medical suture is woven, carrying out dry heating setting on the medical suture to obtain the medical suture with a hollow circular cross section and a negative Poisson ratio effect.
In one possible implementation, the medical suture is woven using a circular weft knitting machine.
In one possible implementation, the yarns are in turn padded loops on cylinder needles and dial needles, and the negative poisson's ratio effect mesh structure at least comprises one or more combinations of rib weave, tuck weave, plating weave and pad weave.
In a possible implementation manner, the medical suture adopts polyamide fiber as a yarn material, and after the medical suture is woven, the medical suture is subjected to damp-heat heating setting to obtain the medical suture with the cross section being in a hollow circular shape and the negative Poisson ratio effect.
The beneficial effect that technical scheme that this application provided brought includes at least:
1. when the medical suture with the negative Poisson ratio effect is stretched along the axial direction, the medical suture can be expanded to a certain extent along the transverse direction (along the cross section direction), and the tissue cutting caused by the thin cross section is avoided.
2. The medical suture with the negative Poisson ratio effect has the advantages that the large surface area can reduce force concentration, and the inner part of the tissue can be flattened due to compression so as to better balance the force distribution between the sutured tissues.
3. The mesh on the medical suture with the negative poisson's ratio effect allows tissue ingrowth at the wound healing stage, better fusion between the tissue and the suture, minimized gap formation between the tissue and the suture, and allows tissue ingrowth and implant bonding.
4. The mesh structure of the medical suture with the negative poisson's ratio effect makes the suture easier to handle, use and tie, it can collapse when tied, and the knot is smaller compared with its oversized diameter.
Drawings
The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiment(s) of the application and together with the description serve to explain the application and not limit the application. In the drawings:
FIG. 1 is a schematic view of a medical suture having a negative Poisson's ratio effect in a flattened ribbon configuration, according to an exemplary embodiment of the present application;
FIG. 2 is a schematic view of axial tension deformation of a medical suture having a negative Poisson's ratio effect in a flattened ribbon form according to an exemplary embodiment of the present application;
FIG. 3 is a schematic view of a medical suture having a negative Poisson's ratio effect according to an exemplary embodiment of the present application in a hollow cylindrical shape;
FIG. 4 is a schematic view of another negative Poisson's ratio medical suture in a flattened ribbon configuration provided by an exemplary embodiment of the present application;
FIG. 5 is a schematic view of axial tension deformation of another medical suture having a negative Poisson's ratio effect provided in accordance with an exemplary embodiment of the present application in a flattened ribbon shape.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The present application will be further described with reference to the following drawings and examples.
First, the terms referred to in the embodiments of the present application will be briefly described:
the negative poisson's ratio effect (NPR), which refers to the fact that a material expands laterally in the elastic range when stretched, and contracts laterally when compressed.
Referring to fig. 1 and 4, the medical suture is formed by knitting through a knitting process, and has a negative poisson's ratio mesh structure, which facilitates tissue ingrowth and reduces tissue cutting, and includes a plurality of coils 1 connected in sequence.
It should be noted that, referring to fig. 2 and 5, due to the negative poisson's ratio effect of the medical suture, when the medical suture is stretched, the cross-sectional width of the suture is increased, so as to exhibit the negative poisson's ratio effect, thereby preventing the suture from generating the cutting phenomenon of stress concentration on the tissue due to the larger stress thinning.
Notably, the end of the medical suture may be reduced in diameter by compression to facilitate attachment to a suture needle.
Optionally, the medical suture is formed by warp knitting or weft knitting.
Optionally, the medical suture thread adopts a yarn material at least comprising one or more of natural materials (animal tendon, sheep intestine, silk, cotton, etc.), synthetic materials (polyamide fiber, polyethylene fiber, polypropylene fiber, polylactic acid fiber, polyester fiber, polyglycolic acid fiber, polylactic acid glycolate fiber, polydioxanone fiber, etc.).
In addition, the medical suture is in a flat belt shape after being knitted and formed by adopting a knitting and weaving process, can be directly used, and can also be subjected to heat setting treatment according to specific requirements, so that the medical suture is in a hollow column shape with different sections. In the examples of the present application, the heat setting treatment means that dry heat setting or wet heat setting can be selected according to the specific raw materials used. For example, polyester and polypropylene are dry heat-set, and nylon is often wet heat-set.
For a better understanding of the present application, reference is made to the following description of the present application in conjunction with the accompanying drawings and two specific embodiments. It should be noted that the described embodiments are only a part of the embodiments of the present application, and do not limit the protection scope of the present application.
Detailed description of the preferred embodiment
The medical suture is knitted by a double needle bed Raschel warp knitting machine with six or more guide bars, please refer to FIG. 3, the medical suture comprises a front piece 2 and a back piece 3, the front piece 2 and the back piece 3 are connected into a whole by a left connecting part 4 and a right connecting part 5; the front sheet 2 and the back sheet 3 are single-side woven regions, and the left joint 4 and the right joint 5 are double-side woven regions. The mesh structure with the negative Poisson ratio effect at least comprises one or more combinations of variable warp flat, variable chaining and variable weft insertion; when the yarns are used for weaving the front piece 2 and the rear piece 3 in the single-side weaving area, the yarns are only padded in the front needle bed and the rear needle bed to form loops; when the yarn weaves the joint of the left joint 4 and the right joint 5 in the double-side weaving area, it simultaneously carries out yarn laying and looping on the front needle bed and the back needle bed.
In the embodiment of the application, the medical suture adopts any synthetic yarn and natural yarn with knitting performance, and can be designed and configured according to the quality of the knitting performance of the yarn and the knitting structure pattern, such as polypropylene fiber, polyester fiber, polyamide fiber, polylactic acid fiber, silk and the like.
Preferably, the medical suture adopts a yarn material of polypropylene fiber, the negative poisson's ratio mesh structure comprises a variable warp and weft insertion, the medical suture presents a flat belt shape as shown in figures 1 and 2 after being woven, and then is subjected to dry-heat setting according to specific size requirements, so that the medical suture with the negative poisson's ratio and the hollow circular cross section as shown in figure 3 is obtained.
Detailed description of the invention
The medical suture is knitted by a small-cylinder-diameter circular weft knitting machine, yarns are in alternate-flow yarn laying looping on cylinder needles and dial needles, and a mesh structure with a negative Poisson ratio effect at least comprises one or more combinations of rib textures, tuck textures, plating textures and lining textures.
In the embodiment of the application, the medical suture adopts any synthetic yarn and natural yarn with knitting performance, and can be designed and configured according to the quality of the knitting performance of the yarn and the knitting structure pattern, such as polypropylene fiber, polyester fiber, polyamide fiber, polylactic acid fiber, silk and the like.
Preferably, the medical suture thread adopts polyamide fiber as the yarn material, the medical suture thread presents a flat belt shape as shown in fig. 4 and fig. 5 after being woven, and then is subjected to damp-heat setting according to specific size requirements, and the medical suture thread with a hollow circular cross section and a negative Poisson ratio effect is obtained.
In summary, the medical suture with the negative poisson's ratio effect provided by the present application has a certain degree of expansion in the transverse direction (along the cross-section direction) when being stretched in the axial direction, so that the tissue is prevented from being cut by the thin cross-section of the medical suture. On the other hand, its larger surface area may also reduce force concentration, and may also flatten out within the tissue as it is squeezed to better balance the distribution of force between the stapled tissues. On the other hand, the mesh on the medical suture with the negative poisson's ratio effect allows the ingrowth of the tissue in the wound healing stage, enables better fusion between the tissue and the suture, minimizes the formation of gaps between the tissue and the suture, and allows tissue ingrowth and implant bonding. On the other hand, the mesh structure of the medical suture with the negative poisson's ratio effect makes the suture easier to handle, use and tie, it can collapse when tied, and the knot is smaller compared with its oversized diameter. The problem of current medical suture because axial load, its certain structure shrink phenomenon still can appear in the tensile process, leads to the cross sectional area of suture to reduce, stress concentration, still can cause the cutting to the tissue in the follow-up draft process is solved.
The above description is only a preferred embodiment of the present application, and it should be noted that: it will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the principles of the application, and such modifications and enhancements are intended to be included within the scope of the application.
Claims (10)
1. The medical suture line with the negative Poisson ratio effect is characterized in that the medical suture line is formed by weaving through a knitting and weaving process, the medical suture line has a mesh structure with the negative Poisson ratio effect, and the mesh structure with the negative Poisson ratio effect comprises a plurality of coils which are connected in sequence;
the medical suture is in a flat belt shape or a hollow column shape.
2. The medical suture having a negative poisson's ratio effect of claim 1, wherein the medical suture uses a yarn material comprising one or more combinations of natural or synthetic materials.
3. The medical suture with negative poisson's ratio effect of claim 1, wherein said medical suture is braided using a knitting and weaving process comprising:
the warp knitting forming or the weft knitting forming is adopted.
4. The medical suture with negative poisson's ratio effect according to claim 3, wherein said medical suture is woven using a double needle bar raschel machine with six and more bar numbers.
5. The negative Poisson's ratio effect medical suture of claim 4, wherein said medical suture comprises a front sheet and a back sheet, said front sheet and said back sheet being connected as a single piece by a left connection and a right connection;
the front piece and the rear piece are single-side woven regions, and the left connecting part and the right connecting part are double-side woven regions.
6. The negative poisson's ratio medical suture of claim 5, wherein said negative poisson's ratio mesh structure comprises at least one or more combinations of varying warp flats, varying braids, and varying weft insertions;
wherein, when the yarn weaves the front piece and the back piece in a single-side weaving area, the yarn is padded into loops only on a front needle bed and a back needle bed;
when the yarns weave the connecting parts of the left connecting part and the right connecting part in the double-sided weaving area, the yarns are padded with yarns at the front needle bed and the rear needle bed simultaneously to form loops.
7. The medical suture thread with negative Poisson's ratio effect as claimed in claim 6, wherein the yarn material of the medical suture thread is polypropylene fiber, and the mesh structure with negative Poisson's ratio effect comprises varying warp flat and varying weft insertion;
and after the medical suture is woven, carrying out dry heating setting on the medical suture to obtain the medical suture with a hollow circular cross section and a negative Poisson ratio effect.
8. The medical suture having a negative poisson's ratio effect of claim 3, wherein said medical suture is woven using a circular weft knitting machine.
9. The medical suture having negative poisson's ratio effect of claim 8, wherein the yarn is needled and looped on the cylinder and dial needles, and the negative poisson's ratio mesh structure comprises at least one or more combinations of rib weave, tuck weave, plating weave, and backing weave.
10. The medical suture thread with negative poisson's ratio effect as claimed in claim 9, wherein the yarn material of the medical suture thread is polyamide fiber, and the medical suture thread is subjected to damp-heat setting after being woven, so as to obtain the medical suture thread with negative poisson's ratio effect, wherein the cross section of the medical suture thread is hollow and circular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211539864.1A CN115737894B (en) | 2022-12-02 | Medical suture with negative poisson's ratio effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211539864.1A CN115737894B (en) | 2022-12-02 | Medical suture with negative poisson's ratio effect |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115737894A true CN115737894A (en) | 2023-03-07 |
| CN115737894B CN115737894B (en) | 2024-07-02 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110059291A1 (en) * | 2009-09-07 | 2011-03-10 | Boyce Christopher M | Structured materials with tailored isotropic and anisotropic poisson's ratios including negative and zero poisson's ratios |
| CN107119363A (en) * | 2017-05-08 | 2017-09-01 | 东华大学 | A kind of rock-steady structure auxetic composite yarn and its preparation facilities, method and purposes |
| CN108166122A (en) * | 2018-02-08 | 2018-06-15 | 湖北枫树线业有限公司 | The bifilar sewing thread of single multifilament and its manufacturing method with drawn expanded performance |
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110059291A1 (en) * | 2009-09-07 | 2011-03-10 | Boyce Christopher M | Structured materials with tailored isotropic and anisotropic poisson's ratios including negative and zero poisson's ratios |
| CN107119363A (en) * | 2017-05-08 | 2017-09-01 | 东华大学 | A kind of rock-steady structure auxetic composite yarn and its preparation facilities, method and purposes |
| CN108166122A (en) * | 2018-02-08 | 2018-06-15 | 湖北枫树线业有限公司 | The bifilar sewing thread of single multifilament and its manufacturing method with drawn expanded performance |
Non-Patent Citations (3)
| Title |
|---|
| STAN, M, 等: "Applications of auxetic textile structures in the industry and society", INDUSTRIA TEXTILA, vol. 61, no. 5, 31 December 2010 (2010-12-31), pages 232 - 235 * |
| 常玉萍，等: "具有负泊松比效应经编织物的制备及其力学性能", 纺织学报, vol. 36, no. 8, pages 47 * |
| 李思明，等: "具有形状记忆功能的负泊松比结构材料的研究进展", 服装学报, vol. 5, no. 4, pages 290 - 297 * |
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