Tubular fabric and method of making same, suture ring and method of making same

Abstract

This invention provides a tubular fabric and its preparation method, as well as a suture ring and its preparation method. The tubular fabric is cylindrical and is formed by combining warp and weft yarns through a densification process. The fabric structure includes plain weave and satin weave, spaced apart in the weft direction. The preparation method includes: sizing pre-obtained warp yarns; warping the sized warp yarns; weaving the warped warp yarns and pre-obtained weft yarns to obtain a preliminary tubular fabric product; and densifying the preliminary tubular fabric product to obtain the final tubular fabric. The suture ring includes an inner ring and the aforementioned tubular fabric, with the tubular fabric covering the outer surface of the inner ring and connected to it via a suture thread. The suture ring provided by this invention has a smoother surface, effectively preventing problems with poor fit to the apex of the heart caused by uneven suture ring surfaces.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a tubular fabric and its preparation method, and a suture ring and its preparation method. Background Technology

[0002] An artificial heart, or ventricular assist device (VAD), is a mechanical device that can be implanted to temporarily partially or completely replace the heart's function and propel blood circulation when the heart has partially or completely lost its function due to damage and is unable to maintain normal systemic circulation. Artificial hearts are divided into assistive artificial hearts and total artificial hearts. Assistive artificial hearts include left ventricular assist, right ventricular assist, and biventricular assist, and are further divided into temporary assistance (within two weeks) and permanent assistance (two years) based on the duration of assistance. Total artificial hearts include temporary total artificial hearts, used to assist the heart while awaiting transplantation.

[0003] Before implanting an artificial heart, a suture loop must be sewn onto the apex of the heart and then anastomosed with a ventricular assist device.

[0004] Currently, the suture rings are mainly made of polyester flat fabric (polyester felt), which is sewn into a cylindrical shape and then sutured to a metal ring. Not only does the fabric absorb a lot of water after suturing, resulting in continuous bleeding during surgery, but it also causes unevenness in the skirt of the suture ring, which can hinder the complete anastomosis between the suture ring and the apex of the heart. In addition, the high density of sutures may cause local compression of the apex of the heart.

[0005] It should be noted that the information disclosed in the background section of this invention is intended only to enhance the understanding of the general background of this invention, and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide a tubular fabric and its preparation method, and a suture ring and its preparation method, which can solve the problems of uneven edges and difficulty in fitting of the suture ring in the prior art.

[0007] To solve the above-mentioned technical problems, the present invention provides a tubular fabric, which is cylindrical in shape and is formed by combining warp and weft yarns through a compaction process. The fabric structure includes plain weave and satin weave, which are spaced apart in the weft direction.

[0008] Optionally, the satin weave is woven from a single warp yarn that spans the length of 2-8 weft yarns.

[0009] Optionally, the warp yarns of the tubular fabric have one or more of the following characteristics:

[0010] The density of the warp yarns is 110-160 yarns / inch;

[0011] The fineness of the warp yarn is 100D-300D;

[0012] The warp yarn has a multifilament count of 30-50f.

[0013] Optionally, the weft yarns of the tubular fabric have one or more of the following characteristics:

[0014] The density of the weft yarn is 75-90 yarns / inch;

[0015] The fineness of the weft yarn is 100D-160D;

[0016] The weft yarn has a multifilament count of 30-40f.

[0017] To solve the above-mentioned technical problems, the present invention provides a method for preparing a tubular fabric, used to prepare the tubular fabric described above, the method comprising:

[0018] The pre-obtained warp yarns are sized.

[0019] The sized warp yarns are then warped.

[0020] The warp yarns after warping and the pre-obtained weft yarns are woven together to obtain a preliminary tubular fabric.

[0021] The tubular fabric is subjected to a densification treatment to obtain a tubular fabric.

[0022] Optionally, the densification treatment temperature is 100-150℃, and the densification treatment time is 3-8 hours.

[0023] To solve the above-mentioned technical problems, the present invention also provides a suture ring, the suture ring comprising an inner ring and the tubular fabric described above, the tubular fabric covering the outer surface of the inner ring and connected to the inner ring by a suture thread;

[0024] When the tubular fabric is a single layer, the stitching is located on the surface of the tubular fabric; when the tubular fabric is multi-layered, the stitching is located inside the tubular fabric.

[0025] The suture is located inside the tubular fabric, meaning that the suture does not appear on the outer surface of the tubular fabric.

[0026] Optionally, the inner ring is provided with a plurality of suture holes along its circumference, and the suture holes have one or more of the following features:

[0027] Each of the aforementioned suture holes contains multiple sutures.

[0028] Each of the aforementioned suture holes contains 6-8 suture threads.

[0029] Each of the aforementioned suture holes is provided with sealant.

[0030] Optionally, the distal end of the inner ring is provided with a fastening device for securing the auxiliary ventricular assist device.

[0031] To address the aforementioned technical problems, the present invention also provides a method for preparing a suture ring, the method comprising:

[0032] At least two layers of tubular fabric are fitted onto the pre-obtained inner ring, wherein the tubular fabric is the tubular fabric described above.

[0033] The middle portion of the at least two layers of tubular fabric is sewn to the proximal end of the inner ring to sew the at least two layers of tubular fabric onto the inner ring;

[0034] The sewn tubular fabric is folded outward from the proximal end of the inner ring to the distal end of the inner ring so that the folded tubular fabric can cover the suture line.

[0035] The folded tubular fabric is then subjected to heat setting treatment;

[0036] After heat setting, the two joints of the folded tubular fabric are fixed at the distal end of the inner ring.

[0037] To address the aforementioned technical problems, the present invention also provides a method for preparing a suture ring, the method comprising:

[0038] A single-layer tubular fabric is fitted onto a pre-obtained inner ring, with a longer tubular fabric reserved on one side of the proximal end of the inner ring. The tubular fabric is the tubular fabric described above.

[0039] The tubular fabric is rolled up multiple times from the proximal end of the inner ring outwards and then flattened.

[0040] The rolled-up tubular fabric is then subjected to heat setting treatment;

[0041] After heat setting, the rolled-up tubular fabric is sewn to the inner ring at the proximal end of the inner ring to sew the rolled-up tubular fabric onto the inner ring.

[0042] The sewn tubular fabric is then fixed to the edge of the inner ring.

[0043] Optionally, the temperature of the heat setting treatment is 90-180℃, the pressure of the heat setting treatment is 4-8MPa, and the time of the heat setting treatment is 10-30 minutes.

[0044] Optionally, the inner ring is provided with a plurality of stitching holes along its circumference;

[0045] The tubular fabric is sewn onto the inner ring by using a backstitch along the plurality of seam holes.

[0046] Optionally, after sewing the tubular fabric onto the inner ring, the preparation method further includes:

[0047] Apply adhesive to the plurality of suture holes.

[0048] Compared with the prior art, the tubular fabric and its preparation method, and the sewing ring and its preparation method provided by the present invention have the following advantages:

[0049] (1) Since the tubular fabric provided by this invention is formed directly through weaving, compared with the prior art using flat fabric sewn into a cylindrical structure, the tubular fabric provided by this invention not only has higher overall strength and elasticity, and is less prone to deformation and breakage during suturing, but also fits better with the inner ring when used as the skirt of the suture ring, avoiding obstacles to the complete anastomosis between the suture ring and the apex of the heart. In addition, since the tubular fabric provided by this invention has undergone a densification treatment, the water seepage of the tubular fabric provided by this invention is low, which can effectively reduce the amount of bleeding during surgery. Furthermore, since the tissue structure of the tubular fabric provided by this invention includes plain weave and satin weave, and the plain weave and satin weave are spaced apart in the weft direction, the tubular fabric provided by this invention not only has high strength and elasticity and a relatively soft texture, but also facilitates the adhesion and growth of endothelial cells in blood vessels.

[0050] (2) The method for preparing tubular fabric provided by the present invention involves first sizing the pre-obtained warp yarns, then warping the sized warp yarns, then weaving the warped warp yarns and the pre-obtained weft yarns to obtain a preliminary tubular fabric product, and finally performing a densification treatment on the obtained preliminary tubular fabric product to obtain a tubular fabric. Because the present invention first sizing the warp yarns and then warping them, it ensures that the yarns are less prone to pilling during weaving, resulting in a smoother surface of the final tubular fabric. Furthermore, by performing a densification treatment on the woven preliminary tubular fabric product, the present invention makes the structure of the final tubular fabric more compact, thereby effectively improving the overall strength and elasticity of the final tubular fabric, making it less prone to deformation and breakage. This allows for better fit with the inner ring when preparing the suture ring, and also effectively reduces the amount of water seepage in the final tubular fabric, thus effectively reducing bleeding during surgery.

[0051] (3) Since the suture ring provided by the present invention includes the tubular fabric described above, the surface of the suture ring provided by the present invention is smoother, which effectively avoids the problem of poor anastomosis with the apex of the heart caused by the uneven surface of the suture ring. In addition, the suture ring provided by the present invention can not only effectively reduce the amount of bleeding during the operation, but also help the endothelial cells in the blood vessels to attach and grow.

[0052] (4) The suture ring preparation method provided by the present invention first places at least two layers of tubular fabric as described above onto the inner ring, then sutures the middle part of the at least two layers of tubular fabric to the proximal end of the inner ring; then folds the sutured tubular fabric outward from the proximal end of the inner ring to the distal end of the inner ring so that the folded tubular fabric can cover the suture line; then heat-set the folded tubular fabric; finally, fix the two joints of the heat-set tubular fabric at the distal end of the inner ring. Because the suture ring preparation method provided by the present invention, after sewing at least two layers of tubular fabric onto the inner ring, folds the tubular fabric outward from the proximal end of the inner ring to the distal end of the inner ring, it can not only bury the suture line inside the multiple layers of tubular fabric to reduce thrombus formation, but also improve the overall thickness and overall strength of the skirt of the finally prepared suture ring, further reducing the amount of bleeding during the operation of the finally prepared suture ring. Furthermore, since the suture ring preparation method provided by the present invention heat-sets the folded tubular fabric, the prepared suture ring can have a smoother surface, effectively preventing the problem of poor fit with the apex of the heart caused by uneven suture ring surface.

[0053] (5) The suture ring preparation method provided by the present invention first places a single layer of the tubular fabric described above onto a pre-obtained inner ring; then rolls the tubular fabric multiple times from the proximal end of the inner ring outwards, and then flattens it; then heat-sets the rolled tubular fabric; then sutures the rolled tubular fabric to the inner ring at the proximal end; and finally fixes the sutured tubular fabric to the edge of the inner ring. Because the suture ring preparation method provided by the present invention rolls the tubular fabric multiple times from the proximal end of the inner ring outwards, the overall thickness and strength of the skirt of the finally prepared suture ring can be increased, further reducing the amount of bleeding during surgery. Furthermore, because the suture ring preparation method provided by the present invention heat-sets the rolled tubular fabric, the prepared suture ring has a smoother surface, effectively preventing problems caused by uneven suture ring surface and poor anastomosis with the apex of the heart. Attached Figure Description

[0054] Figure 1 This is a schematic diagram of the overall structure of the tubular fabric in one embodiment of the present invention;

[0055] Figure 2 This is a partial structural diagram of the tubular fabric after it has been unfolded according to one embodiment of the present invention;

[0056] Figure 3 This is a schematic flowchart of a method for preparing tubular fabric according to an embodiment of the present invention;

[0057] Figure 4a This is a top view of the suture ring according to one embodiment of the present invention;

[0058] Figure 4b for Figure 4a The suture loop shown is a cross-sectional view along section AA;

[0059] Figure 5a This is a top view of the suture ring according to another embodiment of the present invention;

[0060] Figure 5b for Figure 5a The suture loop shown is a cross-sectional view along the BB section;

[0061] Figure 6 This is a schematic flowchart of a method for preparing a suture ring according to one embodiment of the present invention;

[0062] Figure 7 This is a schematic flowchart of a method for preparing a suture ring according to another embodiment of the present invention.

[0063] The reference numerals in the attached figures are as follows:

[0064] Tubular fabric-1; Plain weave-11; Satin weave-12;

[0065] Suture 2; Inner ring 3; Suture hole 4; Distal end 5. Detailed Implementation

[0066] The tubular fabric and its preparation method, as well as the sewing ring and its preparation method, proposed in this invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, only for the purpose of conveniently and clearly illustrating the embodiments of this invention. Please refer to the drawings to make the objectives, features, and advantages of this invention more apparent and understandable. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this invention. Any modifications to the structure, changes in proportions, or adjustments to the size, if they are the same as or similar to the effects and objectives achieved by this invention, should still fall within the scope of the technical content disclosed in this invention. Specific design features of the invention disclosed herein, including, for example, specific dimensions, orientations, positions, and shapes, will be determined in part by the specific application and usage environment. Furthermore, in the embodiments described below, the same reference numerals are sometimes used across different drawings to denote the same parts or parts with the same function, and repeated descriptions are omitted. In this specification, similar reference numerals and letters are used to denote similar items; therefore, once an item is defined in one figure, it need not be discussed further in subsequent figures. Furthermore, if the methods described herein involve a series of steps, and the order of these steps presented herein is not necessarily the only possible order in which they can be performed, some of the described steps may be omitted and / or other steps not described herein may be added to the method.

[0067] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The singular forms “a,” “an,” and “the” include plural objects. The term “or” is generally used to mean “and / or.” The term “several” is generally used to mean “at least one.” The term “at least two” is generally used to mean “two or more.” The term “multiple” is generally used to mean “two or more.” Furthermore, the terms “first,” “second,” and “third” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0068] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0069] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0070] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0071] The core idea of ​​this invention is to provide a tubular fabric and its preparation method, and a sewing ring and its preparation method, so as to solve the problems of uneven edges and difficulty in fitting of the sewing ring in the prior art.

[0072] To achieve the above-mentioned goals, this invention provides a tubular fabric, please refer to... Figure 1 and Figure 2 ,in Figure 1 A schematic diagram of the overall structure of the tubular fabric provided in one embodiment of the present invention is shown (the specific weave structure is not shown); Figure 2 A schematic diagram of a partial structure of the tubular fabric after unfolding according to an embodiment of the present invention is shown.

[0073] like Figure 1 and Figure 2 As shown, the tubular fabric 1 is cylindrical and is formed by combining warp and weft yarns through a compaction process. The fabric structure includes a plain weave 11 and a satin weave 12, which are spaced apart in the weft direction (transverse direction). The plain weave 11 is formed by weaving one warp yarn across one weft yarn, thus creating... Figure 2 The black and white pattern in the design, where black represents threads floating on the fabric surface; the satin weave 12 is formed by weaving a warp thread across 2-8 weft threads, thus creating... Figure 2 The pattern is gray and white, with gray lines indicated by floating threads on the fabric surface.

[0074] Since the tubular fabric 1 provided by this invention is formed directly through weaving, compared with the prior art's use of flat fabric sewn into a cylindrical structure, the tubular fabric 1 of this invention not only has higher overall strength and elasticity, but is also less prone to deformation and breakage during sewing. In addition, the plain weave and satin weave structure design of this invention not only has high strength and elasticity but also a relatively soft texture; the presence of the floating threads of the satin weave 12 is more conducive to the adhesion, migration, and growth of endothelial cells in blood vessels.

[0075] In one exemplary embodiment, the warp yarns of the tubular fabric 1 have one or more of the following characteristics: the warp yarn density is 110-160 ends / inch; the warp yarn fineness is 100D-300D; and the warp yarn multifilament count is 30-50f. The weft yarns of the tubular fabric 1 have one or more of the following characteristics: the weft yarn density is 75-90 ends / inch; the weft yarn fineness is 100D-160D; and the weft yarn multifilament count is 30-40f. This further improves the tightness of the tubular fabric 1, effectively reduces the amount of bleeding from the tubular fabric 1, and also further improves the overall strength of the tubular fabric 1, preventing deformation and tearing during the sewing process.

[0076] Based on the same inventive concept, this invention provides a method for preparing the tubular fabric described above. Please refer to [link / reference]. Figure 3 It schematically illustrates a flow chart of a method for preparing a tubular fabric according to an embodiment of the present invention. For example... Figure 3 As shown, the method for preparing the tubular fabric includes the following steps:

[0077] Step S110: Sizing the pre-obtained warp yarns.

[0078] Step S120: Perform warping treatment on the sized warp yarns.

[0079] Step S130: Weave the warp yarns after warping and the pre-obtained weft yarns to obtain a preliminary tubular fabric.

[0080] Step S140: Perform a densification treatment on the initial tubular fabric product to obtain a tubular fabric.

[0081] Because this invention first sizing the warp yarns before warping, it ensures that the yarns are less prone to pilling during weaving, resulting in a smoother surface for the final tubular fabric. Since this invention directly weaves the tubular fabric, compared to the prior art of sewing polyester flat fabric into a cylinder, this invention can further reduce the density at the seams, minimizing localized pressure on the apex caused by excessive density at the seams.

[0082] Furthermore, by densifying the pre-finished tubular fabric, this invention results in a denser structure, effectively improving the overall strength and elasticity of the final tubular fabric. This makes the fabric less prone to deformation and breakage, allowing for better fit with the inner ring during suture preparation and preventing obstacles to complete anastomosis between the suture ring and the apex of the heart. Simultaneously, it effectively reduces water seepage in the final tubular fabric, thus minimizing bleeding during surgery.

[0083] In one exemplary embodiment, the densification treatment temperature is 100-150°C, and the densification treatment time is 3-8 hours. Specifically, in actual operation, the pre-finished tubular fabric is first washed and dried. Then, the dried tubular fabric is placed in a densification device, and a densification gas, such as dichloromethane vapor, is introduced into it. The temperature is then raised to 100-150°C, and the treatment lasts for 3-8 hours. Thus, utilizing the permeability of dichloromethane vapor under high temperature and pressure, the yarns of the tubular fabric can expand linearly, causing the tubular fabric to shrink, thereby making the structure of the tubular fabric more compact. After cooling, the shape of the tubular fabric does not return, but it still retains the ability to deform to maintain the elasticity of the fabric, thereby achieving the purpose of improving the strength and elasticity of the tubular fabric. Since dichloromethane has the advantages of being non-flammable, having low toxicity, and good stability during recycling, this invention, by using dichloromethane vapor as the densification gas, can not only improve the densification effect but also improve the safety performance during the densification process. The densification process described in this invention can effectively improve the densification effect, making the structure of the tubular fabric after densification more compact, further improving the overall strength and elasticity of the tubular fabric and further reducing the water seepage of the tubular fabric.

[0084] After densifying the initial tubular fabric to obtain a tubular fabric, the preparation method further includes: cleaning the tubular fabric. Cleaning the tubular fabric effectively removes densifying gases, such as dichloromethane, adhering to it.

[0085] The preparation method of the tubular fabric provided by the present invention will be described below through specific embodiments.

[0086] Example 1

[0087] The method for preparing the tubular fabric includes the following steps:

[0088] Step 1: Sizing the polyester yarn (warp) with a specification of 100D / 36f;

[0089] Step 2: Perform warping treatment on the sized polyester yarn (warp) with a specification of 100D / 36f;

[0090] Step 3: Use a knitting machine to knit the warp yarn (100D / 36f) and weft yarn (130D / 35f) after warping to obtain the initial finished tubular fabric. The knitting method is to knit plain weave and satin weave at intervals along the weft direction. In the satin weave, one warp yarn crosses 6 weft yarns.

[0091] Step 4: Place the woven tubular fabric into a compacting device, introduce dichloromethane vapor, and heat to 130°C, then keep it warm for 3 hours.

[0092] Step 5: Clean the tubular fabric after the densification process.

[0093] Example 2

[0094] The method for preparing the tubular fabric includes the following steps:

[0095] Step 1: Sizing the polyester yarn (warp) with a specification of 150D / 40f;

[0096] Step 2: Perform warping treatment on the sized polyester yarn (warp) with a specification of 150D / 40f;

[0097] Step 3: Use a knitting machine to knit the warp yarn (150D / 40f) and weft yarn (100D / 40f) after warping to obtain a tubular fabric. The knitting method is to knit plain weave and satin weave at intervals along the weft direction. In the satin weave, one warp yarn crosses four weft yarns.

[0098] Step 4: Place the woven tubular fabric into a compaction device, introduce dichloromethane vapor, heat to 125°C, and keep warm for 5.5 hours.

[0099] Step 5: Clean the tubular fabric after the densification process.

[0100] Example 3

[0101] The method for preparing the tubular fabric includes the following steps:

[0102] Step 1: Sizing the polyester yarn (warp) with a specification of 200D / 40f;

[0103] Step 2: Perform warping treatment on the sized polyester yarn (warp) with a specification of 200D / 40f;

[0104] Step 3: Use a knitting machine to knit the warp yarn (200D / 40f) and weft yarn (160D / 30f) after warping to obtain the initial finished tubular fabric. The knitting method is to knit plain weave and satin weave at intervals along the weft direction. In the satin weave, one warp yarn crosses 6 weft yarns.

[0105] Step 4: Place the woven tubular fabric into a compaction device, introduce dichloromethane vapor, and heat to 150°C, then keep it warm for 3 hours.

[0106] Step 5: Clean the tubular fabric after the densification process.

[0107] Example 4

[0108] The method for preparing the tubular fabric includes the following steps:

[0109] Step 1: Sizing the polyester yarn (warp) with a specification of 300D / 30f;

[0110] Step 2: Perform warping treatment on the sizing polyester yarn (warp) with a specification of 300D / 30f;

[0111] Step 3: Use a knitting machine to knit the warp yarn (300D / 30f) and weft yarn (100D / 40f) after warping to obtain the initial finished tubular fabric. The knitting method is to knit plain weave and satin weave at intervals along the weft direction. In the satin weave, one warp yarn crosses four weft yarns.

[0112] Step 4: Place the woven tubular fabric into a compaction device, introduce dichloromethane vapor, heat to 100°C, and keep warm for 8 hours.

[0113] Based on the same inventive concept, the present invention also provides a suture ring, please refer to [reference needed]. Figure 4a and Figure 4b ,in Figure 4a A schematic top view of a suture ring provided according to an embodiment of the present invention is shown; Figure 4b for Figure 4a The suture loop shown is a cross-sectional view along section AA (which passes through one of the suture holes). Figure 4a and Figure 4b As shown, the suture ring includes an inner ring 3 and the tubular fabric 1 described above. The tubular fabric 1 covers the outer surface of the inner ring 3 and is connected to the inner ring 3 via suture 2. Because the suture ring provided by this invention includes the tubular fabric described above, and because the tubular fabric is tightly processed, the surface of the suture ring provided by this invention is smoother, effectively avoiding the problem of incomplete anastomosis with the apex of the heart caused by uneven suture ring surface. Furthermore, the suture ring provided by this invention can not only effectively reduce bleeding during surgery but also promote the adhesion and growth of endothelial cells in blood vessels.

[0114] Furthermore, such as Figure 4a and Figure 4b As shown, the inner ring 3 has multiple suture holes 4 along its circumference, and each suture hole 4 contains multiple suture threads 2. Because the inner ring 3 has multiple suture holes 4, it not only facilitates suturing but also effectively prevents deformation of the inner ring 3 during the suturing process.

[0115] Furthermore, each of the suture holes 4 is provided with 6-8 sutures 2, which not only ensures the suture strength between the tubular fabric and the inner ring 3, so that the tubular fabric and the inner ring 3 can be firmly connected together, but also avoids the occurrence of local compression of the apex of the heart due to excessive density of sutures 2.

[0116] In one exemplary embodiment, each of the suture holes 4 is further provided with sealant. Thus, by pouring sealant into the suture holes 4, not only can the amount of bleeding at the suture holes 4 be effectively reduced, but also the friction between the suture 2 and the suture holes 4 can be reduced, preventing the suture 2 from breaking due to excessive friction.

[0117] Furthermore, such as Figure 4b As shown, the outer surface of the inner ring 3 is covered with multiple layers of the tubular fabric 1. This further increases the overall thickness and strength of the skirt of the suture ring, and further reduces the amount of bleeding from the suture ring during surgery.

[0118] Furthermore, such as Figure 4b As shown, the suture hole 4 on the inner ring 3 is a through hole, through which the suture 2 passes. The suture 2 is located inside the multi-layered tubular fabric 1 and does not appear on the outer surface of the tubular fabric 1, thereby effectively reducing thrombus formation. A specific implementation method is as follows: First, the tubular fabric 1 is folded into a double layer, then the double-layered tubular fabric 1 is placed over the outer surface of the inner ring 3, with the suture joint placed in the middle of the double-layered tubular fabric 1; then, the suture joint is sutured; after suturing, the tubular fabric 1 is folded from the proximal end to the distal end 5 of the inner ring 3 to cover the suture 2; subsequently, heat treatment is performed for shaping, and finally, the two joints of the tubular fabric 1 at the distal end of the inner ring 3 are fixed, for example, by gluing them to the inner ring 3, completing the suturing process.

[0119] Furthermore, such as Figure 4a As shown, the distal end 5 of the inner ring may also be provided with a fastening device for securing the ventricular assist device. Thus, by providing a fastening device on the distal end 5 of the inner ring 3, after the ventricular assist device is inserted into the distal end 5 of the inner ring 3, the ventricular assist device can be tightly connected to the suture ring by fastening the fastening device.

[0120] Please continue to refer to this. Figure 5a and Figure 5b ,in Figure 5a A top view of a suture loop provided in another embodiment of the present invention is schematically shown; Figure 5b for Figure 5aThe suture loop shown is a partial sectional view along the BB section. (See attached image.) Figure 5a and Figure 5b As shown, the difference between the suture ring provided in this embodiment and the suture ring provided in the previous embodiment is that both ends of the suture thread 2 are exposed outside the tubular fabric 1. Specifically, for example, the tubular fabric 1 is fitted onto the inner ring 3, with the distal end of the tubular fabric 1 being shorter and the proximal end being longer. The proximal end of the tubular fabric 1 is rolled outward from the center into a ring, then flattened, and sewn to the inner ring 3 at the proximal end. The suture thread 2 sewing the inner ring 3 and the tubular fabric 1 is exposed externally. Then, the edges of the tubular fabric 1 and the inner ring 3 are secured with glue. The distal end of the tubular fabric 1 can be cut off or retained.

[0121] Based on the same inventive concept, this invention also provides a method for preparing a suture ring. Please continue to refer to... Figure 6 The diagram illustrates a flowchart of a method for preparing a suture ring according to an embodiment of the present invention. Figure 6 As shown, in this embodiment, the method for preparing the suture ring includes the following steps:

[0122] Step S210: Place at least two layers of tubular fabric onto the pre-obtained inner ring.

[0123] Step S220: Sew the middle part of the at least two layers of tubular fabric to the proximal end of the inner ring to sew the at least two layers of tubular fabric onto the inner ring.

[0124] Step S230: Fold the sewn tubular fabric outward from the proximal end of the inner ring to the distal end of the inner ring so that the folded tubular fabric can cover the suture line.

[0125] Step S240: Perform heat setting treatment on the folded tubular fabric.

[0126] Step S250: After heat setting, fix the two joints of the folded tubular fabric at the distal end of the inner ring.

[0127] Specifically, the tubular fabric is the tubular fabric 1 described above. Because the tubular fabric 1 has high strength and elasticity, it is less prone to tearing during suturing. Furthermore, since the tubular fabric 1 is integrally formed, the suture density can be effectively reduced, effectively preventing localized pressure on the apex of the heart caused by excessive suture density during use of the prepared suture ring. Additionally, the relatively dense tubular fabric 1 effectively reduces the amount of bleeding during use of the prepared suture ring. Moreover, the method for preparing the suture ring provided by this invention, after suturing at least two layers of tubular fabric 1 onto the inner ring 3, folds the tubular fabric 1 from the proximal end to the distal end 5 of the inner ring 3. This not only buries the suture 2 within the multiple layers of tubular fabric 1 to reduce thrombus formation but also increases the overall thickness and strength of the skirt of the final prepared suture ring, further reducing the amount of bleeding during surgery. In addition, the method for preparing the suture ring provided by the present invention can make the prepared suture ring have a smoother surface by heat setting the folded tubular fabric 1, which can effectively prevent the problem of poor fit with the apex of the heart caused by uneven surface of the suture ring.

[0128] In one exemplary embodiment, the method further includes, prior to heat setting the folded tubular fabric:

[0129] One end of the folded tubular fabric, near the distal end of the inner ring, is fixed to the distal end of the inner ring.

[0130] Specifically, the end of the folded tubular fabric 1 closest to the distal end 5 of the inner ring 3 can be fixed to the distal end 5 of the inner ring 3 using straps or thin thread. This fixes the folded tubular fabric 1 to the distal end 5 of the inner ring 3, facilitating subsequent heat setting. After heat setting, the two joints of the folded tubular fabric 1 are glued to the distal end 5 of the inner ring 3, further improving the smoothness of the final sewn ring surface. It should be noted that, as those skilled in the art will understand, after heat setting, the straps or thin thread should be removed first, and then the two joints of the tubular fabric 1 should be glued to the distal end of the inner ring 3.

[0131] Please continue to refer to this. Figure 7 The diagram illustrates a flowchart of a method for preparing a suture ring according to another embodiment of the present invention. Figure 7 As shown, in this embodiment, the method for preparing the suture ring includes the following steps:

[0132] Step S310: Place the single-layer tubular fabric onto the pre-obtained inner ring;

[0133] Step S320: Roll the tubular fabric outward from the proximal end of the inner ring multiple times, and then flatten it;

[0134] Step S330: Perform heat setting treatment on the rolled-up tubular fabric;

[0135] Step S340: After heat setting, the rolled-up tubular fabric is sewn to the inner ring at the proximal end of the inner ring to sew the rolled-up tubular fabric onto the inner ring.

[0136] Step S350: Fix the sewn tubular fabric to the edge of the inner ring.

[0137] Specifically, the tubular fabric is the tubular fabric 1 described above, and a longer portion of the tubular fabric 1 is reserved on the proximal side of the inner ring 3. Because the tubular fabric 1 has high strength and elasticity, it is less prone to tearing during suturing. Simultaneously, since the tubular fabric 1 is integrally formed, the suture density can be effectively reduced, effectively preventing localized pressure on the apex of the heart caused by excessive density at the suture line during use of the prepared suture ring. Furthermore, because the tubular fabric 1 is relatively dense, the amount of bleeding during use of the prepared suture ring can be effectively reduced. In addition, since the suture ring preparation method provided by this invention involves repeatedly rolling the tubular fabric 1 from the proximal end of the inner ring 3 outwards, the overall thickness and strength of the skirt of the final prepared suture ring can be increased, further reducing the amount of bleeding during surgery. In addition, since the suture ring preparation method provided by the present invention heat-sets the rolled-up tubular fabric 1, the prepared suture ring can have a smoother surface, effectively preventing the problem of poor fit with the apex of the heart caused by uneven suture ring surface.

[0138] In one exemplary embodiment, the heat-setting treatment temperature is 90-180°C, the heat-setting treatment pressure is 4-8 MPa, and the heat-setting treatment time is 10-30 minutes. Specifically, in actual operation, the tubular fabric 1, along with the inner ring 3, is placed in an oven at a temperature of 90-180°C and subjected to a pressure of 4-8 MPa for 10-30 minutes. It is then removed and placed at room temperature to cool, thus completing the heat-setting treatment. The suture ring preparation method provided by this invention, by setting the heat-setting temperature to 90-180°C, the pressure to 4-8 MPa, and the time to 10-30 minutes, ensures that the surface of the initial suture ring obtained after heat-setting treatment is smoother, allowing the tubular fabric 1 to fit tightly against the inner ring 3, effectively preventing the occurrence of incomplete fit with the apex of the heart due to uneven suture ring surface.

[0139] In one exemplary embodiment, the inner ring has a plurality of stitching holes along its circumference.

[0140] Correspondingly, the suture ring preparation method provided by the present invention uses a backstitch to sew along the plurality of suture holes to sew the tubular fabric onto the inner ring.

[0141] Because the inner ring 3 has multiple suture holes 4, it is not only easier to sew, but also effectively prevents deformation of the inner ring during the sewing process. Furthermore, since this invention uses a backstitching method to sew the initial sewn ring along the multiple suture holes 4, knots can be avoided, effectively simplifying the sewing process and improving sewing efficiency. Specifically, sewing can be performed back and forth along the multiple suture holes 4. After sewing, each suture hole 4 contains 6-8 suture threads. This not only ensures the sewing strength between the tubular fabric 1 and the inner ring 3, but also avoids localized pressure on the apex of the heart caused by excessive suture density.

[0142] The suture material can be any one or more of polyester, polypropylene, and ultra-high molecular weight polyethylene. Therefore, by using any one or more of polyester, polypropylene, and ultra-high molecular weight polyethylene as the suture material, not only can the biocompatibility of the suture be guaranteed, but its strength can also be effectively improved, preventing breakage during use. The suture diameter can be any one of 3-0, 4-0, 5-0, and 6-0, and this invention does not limit this.

[0143] In one exemplary embodiment, after sewing the tubular fabric onto the inner ring, the preparation method further includes:

[0144] Apply adhesive to the plurality of suture holes.

[0145] Therefore, by applying adhesive to the multiple suture holes 4, not only can the amount of bleeding at the suture holes 4 be effectively reduced, but also the friction between the suture 2 and the suture holes 4 can be reduced, avoiding suture breakage due to excessive friction. Specifically, in actual operation, adhesive can be injected into the distal end 5 of the multiple suture holes 4 near the inner ring 3 to seal the suture holes 4, and then the tubular fabric 1 and the inner ring 3 can be bonded together with adhesive. The adhesive is a biocompatible adhesive, and the adhesive can be any one or more of natural rubber, acrylic copolymer, silicone copolymer, polyurethane, etc.

[0146] The preparation method of the suture ring provided by the present invention will be described below through specific embodiments.

[0147] Example 5

[0148] The method for preparing the suture ring provided by the present invention includes the following steps:

[0149] Step 1: Place at least two layers of the tubular fabric 1 described above onto the pre-obtained inner ring 3, and sew along the multiple sewing holes 4 on the inner ring 3 using a backstitching method to sew the middle part of the at least two layers of tubular fabric 1 to the proximal end of the inner ring 3.

[0150] Step 2: Inject glue into the distal end 5 of the plurality of suture holes 4 near the inner ring 3 to seal the suture holes 4.

[0151] Step 3: Cut off the excess fabric 1 at the distal end 5 of the inner ring 3, and fold the tubular fabric 1 from the proximal end of the inner ring 3 to the distal end 5 of the inner ring 3 so that the folded tubular fabric 1 can cover the suture line 2.

[0152] Step 4: Tie and fix one end of the folded tubular fabric 1 near the distal end 5 of the inner ring 3 to the distal end 5 of the inner ring 3, and place the tubular fabric 1 together with the inner ring 3 in an oven at 135°C and apply a pressure of 6MPa for 20 minutes to perform heat setting treatment on the tubular fabric 1.

[0153] Step 5: Remove the heat-set tubular fabric 1 along with the inner ring 3 and place it at room temperature to cool.

[0154] Step 6: Use glue to bond and fix the two joints of the tubular fabric 1 at the distal end 5 of the inner ring 3.

[0155] The specific structure of the suture ring prepared by the method provided in Example 5 can be seen in Figure 4.

[0156] Example 6

[0157] Step 1: Place the single-layer tubular fabric 1 described above onto the pre-obtained inner ring 3. Leave a longer tubular fabric 1 on one side of the inner ring 3 near the center. Roll the tubular fabric 1 outward from the center of the inner ring 3 multiple times, and then flatten it.

[0158] Step 2: Place the inner ring 3, which is fitted with the tubular fabric 1, in an oven at 135°C and apply a pressure of 6MPa for 20 minutes to perform heat setting on the tubular fabric 1.

[0159] Step 3: Remove the heat-set tubular fabric 1 along with the inner ring 3 and place it at room temperature to cool.

[0160] Step 4: Cut off the excess fabric at the distal end 5 of the inner ring, and sew along the multiple sewing holes 4 on the inner ring 3 using a backstitch, so as to sew the rolled-up tubular fabric 1 onto the inner ring 3.

[0161] Step 5: Inject glue into the distal end 5 of the plurality of suture holes 4 near the inner ring 3 to seal the suture holes 4.

[0162] Step 6: Use glue to bond and fix the tubular fabric 1 to the edge of the inner ring 3.

[0163] The specific structure of the suture ring prepared by the method provided in Example 6 can be seen in Figure 5.

[0164] In summary, compared with the prior art, the tubular fabric and its preparation method, and the sewing ring and its preparation method provided by the present invention have the following advantages:

[0165] (1) Since the tubular fabric provided by this invention is formed directly through weaving, compared with the prior art using flat fabric sewn into a cylindrical structure, the tubular fabric provided by this invention not only has higher overall strength and elasticity, and is less prone to deformation and breakage during suturing, but also fits better with the inner ring when used as the skirt of the suture ring, avoiding obstacles to the complete anastomosis between the suture ring and the apex of the heart. In addition, since the tubular fabric provided by this invention has undergone a densification treatment, the water seepage of the tubular fabric provided by this invention is low, which can effectively reduce the amount of bleeding during surgery. Furthermore, since the tissue structure of the tubular fabric provided by this invention includes plain weave and satin weave, and the plain weave and satin weave are spaced apart in the weft direction, the tubular fabric provided by this invention not only has high strength and elasticity and a relatively soft texture, but also facilitates the adhesion and growth of endothelial cells in blood vessels.

[0166] (2) The method for preparing tubular fabric provided by the present invention involves first sizing the pre-obtained warp yarns, then warping the sized warp yarns, then weaving the warped warp yarns and the pre-obtained weft yarns to obtain a preliminary tubular fabric product, and finally performing a densification treatment on the obtained preliminary tubular fabric product to obtain a tubular fabric. Because the present invention first sizing the warp yarns and then warping them, it ensures that the yarns are less prone to pilling during weaving, resulting in a smoother surface of the final tubular fabric. Furthermore, by performing a densification treatment on the woven preliminary tubular fabric product, the present invention makes the structure of the final tubular fabric more compact, thereby effectively improving the overall strength and elasticity of the final tubular fabric, making it less prone to deformation and breakage. This allows for better fit with the inner ring when preparing the suture ring, and also effectively reduces the amount of water seepage in the final tubular fabric, thus effectively reducing bleeding during surgery.

[0167] (3) Since the suture ring provided by the present invention includes the tubular fabric described above, the surface of the suture ring provided by the present invention is smoother, which effectively avoids the problem of poor anastomosis with the apex of the heart caused by the uneven surface of the suture ring. In addition, the suture ring provided by the present invention can not only effectively reduce the amount of bleeding during the operation, but also help the endothelial cells in the blood vessels to attach and grow.

[0168] (4) The suture ring preparation method provided by the present invention first places at least two layers of tubular fabric as described above onto the inner ring, then sutures the middle part of the at least two layers of tubular fabric to the proximal end of the inner ring; then folds the sutured tubular fabric outward from the proximal end of the inner ring to the distal end of the inner ring so that the folded tubular fabric can cover the suture line; then heat-set the folded tubular fabric; finally, fix the two joints of the heat-set tubular fabric at the distal end of the inner ring. Because the suture ring preparation method provided by the present invention, after sewing at least two layers of tubular fabric onto the inner ring, folds the tubular fabric outward from the proximal end of the inner ring to the distal end of the inner ring, it can not only bury the suture line inside the multiple layers of tubular fabric to reduce thrombus formation, but also improve the overall thickness and overall strength of the skirt of the finally prepared suture ring, further reducing the amount of bleeding during the operation of the finally prepared suture ring. Furthermore, since the suture ring preparation method provided by the present invention heat-sets the folded tubular fabric, the prepared suture ring can have a smoother surface, effectively preventing the problem of poor fit with the apex of the heart caused by uneven suture ring surface.

[0169] (5) The suture ring preparation method provided by the present invention first places a single layer of the tubular fabric described above onto a pre-obtained inner ring; then rolls the tubular fabric multiple times from the proximal end of the inner ring outwards, and then flattens it; then heat-sets the rolled tubular fabric; then sutures the rolled tubular fabric to the inner ring at the proximal end; and finally fixes the sutured tubular fabric to the edge of the inner ring. Because the suture ring preparation method provided by the present invention rolls the tubular fabric multiple times from the proximal end of the inner ring outwards, it can increase the overall thickness and strength of the skirt of the finally prepared suture ring, further reducing the amount of bleeding during surgery. Furthermore, because the suture ring preparation method provided by the present invention heat-sets the rolled tubular fabric, the prepared suture ring has a smoother surface, effectively preventing problems caused by uneven suture ring surface and poor anastomosis with the apex of the heart.

[0170] Furthermore, in the description of this specification, the reference to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., means that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0171] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure are within the protection scope of the present invention. Obviously, those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Therefore, if these modifications and variations fall within the scope of the present invention and its equivalents, the present invention also intends to include these modifications and variations.

Claims

1. A suture ring, characterized in that, It includes an inner ring and a tubular fabric, the tubular fabric being formed directly by weaving, the tubular fabric being cylindrical, the tubular fabric being formed by combining warp and weft yarns after a compaction process, the structure of the tubular fabric including plain weave and satin weave, the plain weave and the satin weave being spaced apart in the weft direction; The tubular fabric is wrapped around the outer surface of the inner ring and connected to the inner ring by a stitch; When the tubular fabric is a single layer, the stitching is located on the surface of the tubular fabric; when the tubular fabric is multi-layered, the stitching is located inside the tubular fabric. The inner ring is provided with multiple stitching holes along its circumference; The method for preparing the tubular fabric includes: The pre-obtained warp yarns are sized. The sized warp yarns are then warped. The warp yarns after warping and the pre-obtained weft yarns are woven together to obtain a preliminary tubular fabric. After the tubular fabric is cleaned and dried, it is placed in a densification device and dichloromethane vapor is introduced into it. Then, the temperature is raised to 100-150°C and treated for 3-8 hours to obtain the tubular fabric.

2. The suture ring according to claim 1, characterized in that, The satin weave is woven by a single warp yarn that spans the length of 2-8 weft yarns.

3. The suture ring according to claim 1, characterized in that, The warp yarns of the tubular fabric have one or more of the following characteristics: The density of the warp yarns is 110-160 yarns / inch; The fineness of the warp yarn is 100D-300D; The warp yarn has a multifilament count of 30-50f.

4. The suture ring according to claim 1, characterized in that, The weft yarns of the tubular fabric have one or more of the following characteristics: The density of the weft yarn is 75-90 yarns / inch; The fineness of the weft yarn is 100D-160D; The weft yarn has a multifilament count of 30-40f.

5. The suture ring according to claim 1, characterized in that, The suture hole has one of the following characteristics: Each of the aforementioned suture holes is provided with multiple sutures; Each of the aforementioned suture holes is provided with 6-8 of the aforementioned sutures; Each of the aforementioned suture holes is provided with sealant.

6. The suture ring according to claim 1, characterized in that, The distal end of the inner ring is provided with a fastening device for securing the auxiliary ventricular assist device.

7. A method for preparing a suture ring, used to prepare the suture ring according to any one of claims 1 to 6, characterized in that, include: At least two layers of tubular fabric are fitted onto the pre-obtained inner ring; The middle portion of the at least two layers of tubular fabric is sewn to the proximal end of the inner ring to sew the at least two layers of tubular fabric onto the inner ring; The sewn tubular fabric is folded outward from the proximal end of the inner ring to the distal end of the inner ring so that the folded tubular fabric can cover the suture line. The folded tubular fabric is then subjected to heat setting treatment; After heat setting, the two joints of the folded tubular fabric are fixed at the distal end of the inner ring.

8. A method for preparing a suture ring, used to prepare the suture ring according to any one of claims 1 to 6, characterized in that, include: A single-layer tubular fabric is fitted onto a pre-obtained inner ring, with a longer tubular fabric reserved on the proximal side of the inner ring. The tubular fabric is rolled up multiple times from the proximal end of the inner ring outwards and then flattened. The rolled-up tubular fabric is then subjected to heat setting treatment; After heat setting, the rolled-up tubular fabric is sewn to the inner ring at the proximal end of the inner ring to sew the rolled-up tubular fabric onto the inner ring. The sewn tubular fabric is then secured to the edge of the inner ring.

9. The method for preparing the suture ring according to claim 7 or 8, characterized in that, The heat setting treatment is performed at a temperature of 90-180℃, at a pressure of 4-8MPa, and for a time of 10-30 minutes.

10. The method for preparing the suture ring according to claim 7 or 8, characterized in that, The tubular fabric is sewn onto the inner ring by using a backstitch along the plurality of seam holes.

11. The method for preparing the suture ring according to claim 10, characterized in that, After sewing the tubular fabric onto the inner ring, the preparation method further includes: Apply adhesive to the plurality of suture holes.

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