Suture line with drainage function and surgical suturing instrument adopting suture line

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a suture line with a drainage function and a surgical suturing instrument adopting the suture line. A drainage channel penetrating through the suture line body in the length direction of the suture line body is formed in the middle or the side portion of the suture line body, and the drainage channel is communicated with the tissue needle channel and used for draining liquid in the tissue needle channel and the suture area. Liquid drainage of a suture area can be completed, and various complications such as edema, delayed healing and infection of a wound area which are aggravated due to the fact that generated blood or tissue fluid cannot be effectively drained are avoided; in addition, the drainage channel is continuously arranged, so that the negative pressure limitation of tissues around the suture channel on the suture line and the needle can be relieved in the suture operation process, the needle threading operation is facilitated, and the drainage release of tissue fluid is facilitated in the static process; in order to prevent the drainage channel from being blocked, an anti-coagulation coating is arranged in the drainage channel, and a suture needle which is connected with a suture line and provided with a longitudinal groove body is further arranged.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular, relates to a suture with drainage function and a surgical suturing instrument using the suture. Background Art

[0002] Surgical suturing is a crucial step in the surgical process, with the main purpose of restoring tissue integrity and promoting wound healing. However, traditional suturing techniques often face the problem of poor drainage in the surgical area after surgery, resulting in the accumulation of blood and tissue fluid in the surgical area, which can cause tissue swelling, increase the risk of infection, and may prolong the patient's recovery time.

[0003] Although a variety of techniques and devices have been developed over the past few decades to improve suturing results and speed up patient recovery, including the use of staples, skin glue, and suture needles and sutures of different shapes and sizes made of various materials, these improvements have provided more options for various types of wounds. However, existing technologies still cannot completely avoid the accumulation of blood and tissue fluid in the suture area, which often causes edema and other complications.

[0004] Therefore, there is an urgent need for a simple, easy-to-promote surgical suturing instrument with drainage function to better address the limitations of existing suturing technology, reduce the risk of complications, and improve postoperative recovery efficiency. Summary of the invention

[0005] In view of the defects of the prior art, the present invention proposes a suture with drainage function and a surgical suturing instrument using the suture. By setting a drainage channel on the suture, efficient drainage of tissue fluid in the suture area is achieved, thereby achieving the purpose of simultaneous suturing and drainage, and effectively improving postoperative wound management and healing effects.

[0006] In one aspect, the present invention provides a suture with drainage function, the suture comprising a suture body;

[0007] A drainage channel is provided in the middle or side of the suture body and runs through along the length direction thereof;

[0008] The drainage channel is communicated with the tissue needle channel and is used for draining liquid exuded from the tissue needle channel and the suture area.

[0009] By adopting the above technical solution, the drainage channel set in the middle or side of the suture body can run through the length of the suture to ensure that the exuded liquid can be quickly drained away. This design effectively reduces the accumulation of blood and tissue fluid in the postoperative suture area, reduces the risk of tissue swelling, and helps reduce infection. By draining the exudate in time, the liquid retention and pressure at the edge of the wound are reduced, thereby reducing the chance of inflammatory response and scar hyperplasia caused by fluid accumulation. The drainage suture is suitable for various surgical sutures, especially for areas with high exudate or high risk of infection, such as abdominal and chest surgeries.

[0010] Optionally, the structure of the suture thread adopts a single-strand thread body or a multi-strand thread body;

[0011] The suture thread of the single-strand body is provided with an opening in communication with the drainage channel and the tissue needle channel on its side, and the opening is used to drain the liquid in the tissue needle channel and the suture area to the drainage channel;

[0012] The multiple strands of the suture are connected to each other via a connecting portion, and the connecting portion is arranged along the suture path; the connecting portion is recessed inwardly relative to the surface of the thread connected to it, and the recess serves as a drainage channel; the number of the multiple strands is 2-6.

[0013] By adopting the above technical solution, the single-strand suture is provided with an opening on the side that is connected to the drainage channel and the tissue needle channel. This design can effectively guide the exudate in the suture area and the tissue needle channel into the drainage channel. The multi-strand suture is connected by a connecting part, so that each strand maintains a stable structure. The depression formed by the connecting part creates a drainage path between different strands, which is suitable for handling complex situations of liquid exudation in the surgical area and enhancing the adaptability of the suture. The multi-strand design provides a flexible choice of 2-6 strands. Medical staff can choose the appropriate number of strands according to specific surgical needs to adapt to the size and shape of different wounds, thereby realizing a personalized suture solution.

[0014] Optionally, the opening is a plurality of openings arranged along the side of the suture, or a side groove extending along the longitudinal axis of the suture and running through the entire length thereof;

[0015] When the opening of the suture of the single-strand body is a side groove, the opening angles of the edges on both sides of the cross section of the suture are greater than 0° and less than 180°.

[0016] By adopting the above technical solution, the design of the opening can adopt multiple openings arranged along the side of the suture line, and can also adopt a side groove extending along the longitudinal axis of the suture line and running through the entire length. This diversified drainage path ensures that the exudate can be guided to the drainage channel under different surgical conditions. When the opening is a side groove and the angle of the opening is greater than 30° and less than 90°, such an angle range can provide sufficient drainage space to prevent the drainage channel from being closed due to tissue compression.

[0017] Optionally, when the suture line is in a straight line, the drainage channel extends along the longitudinal axis of the suture line.

[0018] By adopting the above technical solution, the drainage channel is designed to extend along the longitudinal axis of the suture line, so that the drainage effect can cover the entire length of the suture line, ensuring the penetration and continuity of the drainage channel, so that all parts of the wound can be effectively drained.

[0019] Optionally, the opening edge of the single-strand suture body has suture wings extending outward, and the suture wings extend from one end to the other end along the longitudinal axis direction of the suture body.

[0020] By adopting the above technical solution, the suture side wings can open the soft tissue around the suture body to prevent the drainage channel from being squeezed and closed by the surrounding soft tissue.

[0021] Optionally, the cross-sectional shape of the drainage channel of the single-strand wire body includes one of a crescent shape, a semicircular shape, a square shape, and an elliptical shape.

[0022] By adopting the above technical solution, the cross-sectional shape of the drainage channel adopts a variety of designs, which can optimize the drainage performance according to different surgical requirements.

[0023] Optionally, the material of the suture includes non-degradable materials and / or biodegradable materials; non-degradable materials include one or more of nylon, polytetrafluoroethylene, polyester fiber, stainless steel, nickel-chromium alloy, titanium and titanium alloy; biodegradable materials include one or more of polyacetic acid, polylactic acid-glycolic acid copolymer, polyglycolic acid-ethyl ester, magnesium and magnesium alloys, iron and iron alloys, zinc and zinc alloys.

[0024] By adopting the above technical solutions, the sutures are designed with non-degradable materials and / or biodegradable materials, providing a wide range of material options. Non-degradable materials have excellent strength, durability and biocompatibility, and are suitable for surgeries that require long-term suture support, such as joint repair and heart valve fixation; biodegradable materials can gradually degrade in the body and are suitable for situations that do not require permanent suture support, such as skin sutures, muscle repairs and visceral surgery, which helps reduce postoperative foreign body reactions and the need for secondary surgery. The flexible choice of materials enables sutures to adapt to a wide range of clinical scenarios and provide precise postoperative support.

[0025] Optionally, the inner and outer surfaces of the suture are coated with a hydrophobic coating containing an anti-infective drug; or coated with a hydrophilic coating containing an anti-infective drug.

[0026] By adopting the above technical solution, the inner and outer surfaces of the suture are coated with a coating containing anti-infection drugs. Whether it is a hydrophobic coating or a hydrophilic coating, it can effectively release the anti-infection drugs, directly act on the suture area, inhibit the growth and reproduction of bacteria, reduce the risk of postoperative infection, and improve the safety of surgery and the patient's recovery effect.

[0027] On the other hand, the present invention further provides a surgical suturing instrument, the surgical suturing instrument comprising a suturing needle connected to a suture thread; the suturing needle is provided with at least one guide groove, the guide groove is used to release the negative pressure restriction of the surrounding tissue on the suturing needle during the dynamic needle threading process;

[0028] The surgical suturing instrument may use any of the above-mentioned sutures with drainage function, or a conventional suture.

[0029] By adopting the above technical solution, the suturing instrument is not only compatible with sutures with drainage function, but also can use conventional sutures. Medical staff can choose suitable sutures according to the type of surgery and the specific situation of the patient, realize personalized surgical plans, and meet different clinical needs. The guide groove set on the suture needle can effectively remove the negative pressure restriction of the surrounding tissue on the suture needle during the dynamic needle threading process, and reduce the adsorption and friction of the tissue on the needle body.

[0030] Optionally, the guide groove is longitudinally arranged on the surface of the needle body of the suture needle, and the guide groove starts from a part of the needle body close to the needle head, extends smoothly along the curved surface of the suture needle and passes through the needle body to the needle tail.

[0031] By adopting the above technical solution and providing a smoothly extending guide groove, the pressure exerted by the suture needle on the tissue during the puncture process is effectively dispersed, thereby reducing the cutting and compression damage to the tissue. This design helps to reduce intraoperative bleeding and tissue trauma, promote postoperative healing and reduce the occurrence of complications.

[0032] In summary, the present invention includes at least one of the following beneficial technical effects:

[0033] First, the drainage channel and guide groove design of the suture thread of the present invention can guide the exudate in the surgical area, reduce the accumulation of blood and tissue fluid, reduce the risk of postoperative infection and tissue swelling, and promote wound healing.

[0034] Second, the multi-strand thread design of the present invention provides flexible selection of 2-6 strands, and the appropriate number of threads can be selected according to surgical requirements to adapt to different wound sizes and shapes, providing personalized suturing solutions.

[0035] Third, the suture of the present invention prevents the drainage channel from being closed due to soft tissue compression by designing the side groove opening and the suture side wings, thereby ensuring the continuity and permeability of the drainage channel.

[0036] Fourth, the suture of the present invention can be made of non-degradable materials or biodegradable materials to meet the requirements of different surgeries for durability and biocompatibility. Non-degradable materials provide long-term support, and biodegradable materials reduce foreign body reactions and the need for secondary surgery.

[0037] Fifth, the suture of the present invention can be coated with a hydrophobic coating or a hydrophilic coating containing anti-infective drugs and anticoagulant drugs to effectively prevent infection and improve the lubricity of suture operation. The hydrophobic coating reduces liquid adhesion, and the hydrophilic coating enhances the operating performance to meet different postoperative care needs.

[0038] Sixth, the suturing device of the present invention is compatible with drainage sutures and conventional sutures, providing flexibility in surgical plans. By providing a drainage groove, the negative pressure restriction of the tissue on the suture needle is reduced, thereby improving suturing efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a three-dimensional structural diagram of a single-strand suture thread according to Example 1 of the present invention;

[0040] Figure 2 is a side view of a single-strand suture according to Example 1 of the present invention;

[0041] Figure 3 is a partial photo 1 of the single-strand suture thread of Example 1 of the present invention;

[0042] Figure 4 is a second partial photograph of the single-strand suture thread of Example 1 of the present invention;

[0043] Figure 5 This is a rendering of the effect of the existing single-strand suture without drainage channel in the suture area;

[0044] Figure 6 This is a rendering of the effect of the single-strand suture thread in the suture area according to Example 1 of the present invention;

[0045] Figure 7 is a three-dimensional structural diagram of a single-strand suture thread according to Embodiment 2 of the present invention;

[0046] Figure 8 is a three-dimensional structural diagram of a double-strand suture thread according to Embodiment 3 of the present invention;

[0047] Fig. 9 is a real photo of the double-strand suture thread of Example 3 of the present invention;

[0048] Fig.10 is a diagram showing the effect of the double-strand suture thread in the suture area according to Example 3 of the present invention;

[0049] Fig.11 is a three-dimensional structural diagram of a three-strand suture thread according to Embodiment 4 of the present invention;

[0050] Fig.12 is a three-dimensional structural diagram of a single-strand suture thread of a variant structure of Example 4 of the present invention;

[0051] Fig.13 is a schematic structural diagram of a suturing device according to Embodiment 5 of the present invention;

[0052] Fig.14 is a three-dimensional structural diagram of a suture needle according to Embodiment 5 of the present invention;

[0053] Fig.15 This is a photo of a suturing device according to Embodiment 4 of the present invention.

[0054] Among them, 1-suture; 10-drainage channel; 11-opening; 12-connecting part; 13-suture flank; 2-transition part; 3-suture needle; 30-guide groove. DETAILED DESCRIPTION

[0055] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0056] In the description of this application, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. Terms such as "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0057] In the description of the present application, it should be understood that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the present application.

[0058] In the description of this specification, the description of the terms "one embodiment / method", "some embodiments / methods", "specific embodiments / methods", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments / methods or examples in a suitable manner.

[0059] The present invention describes a suture with drainage function and a surgical suture instrument using the suture. The suture is provided with a drainage channel running along the length of the suture, and the suture is connected with a suture needle for use. When the suture needle penetrates the skin or muscle tissue, a needle channel is formed, and the suture follows the needle body into the needle channel. The drainage channel timely drains the exudate around the needle channel, effectively avoiding the retention of blood or tissue fluid, reducing the occurrence of wound complications, and promoting wound healing.

[0060] Example 1

[0061] As the instruction manual Figure 1 The suture with drainage function of the present invention comprises a suture body, and a drainage channel 10 is arranged along the length direction of the suture body in the middle or side portion thereof. This channel is connected to a channel formed when the suture needle passes through the tissue (hereinafter referred to as the channel as the suture needle channel), and is used to drain the liquid (such as blood or tissue fluid) exuded during the operation to the outside of the suture area to prevent complications caused by liquid accumulation.

[0062] The suture 1 is composed of a single strand, and an opening is provided on its side to communicate with the drainage channel 10 and the tissue needle channel. The function of the opening is to drain the liquid in the needle channel and the suture area to the drainage channel 10, thereby ensuring that the liquid can be discharged smoothly and reducing the risk of postoperative infection and swelling. The opening is a side groove that runs through the suture 1 along the longitudinal axis.

[0063] As the instruction manual Figure 2, when the suture is in a straight state and is not subjected to force, the opening angle α of the edges on both sides of the cross-section of the suture 1 is between 0° and 180°. A smaller angle (close to 0°) may make the channel narrower and more susceptible to external pressure; while a larger angle (close to 180°) increases the openness of the drainage channel, it may affect the overall strength and operability of the suture. In order to optimize the drainage effect and the structural stability of the suture, the preferred range of angle α is 30° to 90°. Selecting an angle between 30° and 90° can not only optimize the smoothness of liquid drainage and reduce the risk of channel closure due to tissue compression, but also ensure that the suture maintains high mechanical strength and stability during operation.

[0064] The cross-section of the drainage channel can be in a variety of shapes, such as crescent, semicircular, square or elliptical, depending on the surgical requirements. Such a design helps to maintain the patency of the channel and effective drainage.

[0065] In this embodiment, the wall thickness of the suture 1 is 0.2 to 0.5 times the diameter of the drainage channel 10. If the wall thickness is set too thin, the suture may break due to excessive tension during the suturing process; if it is too thick, it may affect the flexibility of the suture and the effectiveness of the drainage channel. Selecting a ratio of 0.2 to 0.5 times effectively avoids these two types of problems and ensures a balance between drainage function and structural integrity. When selecting a specific ratio, 0.3 to 0.4 times is the recommended range. Within this range, the suture can provide sufficient tensile strength and avoid the risk of breakage due to too thin wall thickness. The design of the wall thickness directly affects the ultimate tensile strength of the suture. By controlling the ratio of wall thickness to drainage channel diameter between 0.2 and 0.5, it is ensured that the suture can withstand an effective tension exceeding the required for wound closure during use. In surgeries with higher strength requirements (such as joint repair and large abdominal incision surgery), a wall thickness close to 0.5 times can be selected to increase tensile strength; in surgeries with soft tissue or surface sutures, a wall thickness close to 0.2 times helps to increase flexibility and ease of operation.

[0066] Optionally, the material of the suture 1 includes non-degradable materials, and / or biodegradable materials. Non-degradable materials include one or more of nylon, polytetrafluoroethylene, polyester fiber, stainless steel, nickel-chromium alloy, titanium and titanium alloy; biodegradable materials include polyacetic acid, polylactic acid-glycolic acid copolymer, polyglycolic acid-ethyl ester, magnesium and magnesium alloy, iron and iron alloy, zinc and zinc alloy. These materials all have a certain mechanical strength to ensure that the suture 1 will not cause the drainage channel 10 to be squeezed and deformed due to expansion and deformation due to absorption of blood or tissue fluid or suture distortion during use, thereby ensuring smooth drainage during the suture process. In clinical scenario adaptation, a combination of materials is selected according to the type of surgery (such as orthopedics, plastic surgery, gastrointestinal surgery) to meet the specific mechanical requirements, drainage requirements and biocompatibility requirements of the surgery. For example: For soft tissue repair surgery (such as skin suture, plastic surgery), the suture needs to have good flexibility and biocompatibility, and the drainage channel is required to prevent the accumulation of postoperative exudate. Nylon and polytetrafluoroethylene materials are soft and low-irritating, suitable for soft tissue suture without affecting the natural healing process of the tissue. The drainage channel helps keep the incision area dry and reduces infection and scar formation. For surgery in high-risk infection areas (such as the abdomen and urogenital system), these surgical sites have high requirements for infection control and may require temporary drainage functions. Degradable polymer materials, such as polylactic acid-glycolic acid copolymer, are used to provide temporary support and can gradually degrade to reduce foreign body reactions. Titanium alloys are suitable for scenarios that require high-strength support, and the anti-infection coating coated on their surface can significantly reduce the risk of infection. For orthopedic surgery (such as joint repair and fracture fixation), extremely high tensile strength and durability are required, while adapting to the biomechanical environment of bones. Stainless steel and nickel-chromium alloys are selected to provide excellent mechanical strength and biocompatibility, suitable for long-term retention. Magnesium alloys have a fast degradation rate and are suitable for situations where no long-term support is required after bone healing. For cardiovascular surgery (such as vascular suture, valve repair), sutures are required to have good blood compatibility, low friction and tensile strength to prevent thrombosis and tissue reaction. Polytetrafluoroethylene and polyester fibers have good flexibility and biocompatibility.

[0067] Optionally, the inner and outer surfaces of the suture 1 are coated with a hydrophobic coating containing anti-infective drugs and anticoagulants; or coated with a hydrophilic coating containing anti-infective drugs and anticoagulants. The hydrophobic coating can repel water and body fluids, reduce the adhesion of liquids on the surface of the suture, and reduce the friction and adhesion between tissues and sutures. It is suitable for surgeries that need to reduce liquid contact and adhesion, such as sutures in the abdominal cavity, thoracic cavity and joints. The hydrophilic coating absorbs moisture and increases the lubricity of the suture, making it smoother during puncture and suturing, reducing damage to tissues. The hydrophilic coating is suitable for suture operations that require high lubricity, such as vascular sutures, cardiovascular surgery, soft tissue repair, etc.

[0068] This embodiment takes die extrusion molding and laser cutting processes as examples to illustrate the preparation process of the suture thread 1:

[0069] S1: Preparation of suture raw materials: Select high-purity polypropylene particles or other applicable polymer materials (such as polytetrafluoroethylene, polyester fiber, etc.) to ensure that the biocompatibility and mechanical properties of the materials meet medical standards. Dry the polypropylene particles to remove moisture from the particles and prevent bubbles or uneven melting during heating. The drying temperature is controlled at 70°C to 80°C and the drying time is 4 to 6 hours.

[0070] S2: Add the dried polypropylene pellets into the melting equipment and heat them to 180°C to 220°C to completely melt the pellets into a uniform liquid state. Constant temperature and pressure must be maintained during the process to ensure uniform melting and plasticization of the material.

[0071] S3: The molten polypropylene is conveyed to the forming die through a screw extruder. The die needs to be precisely designed to match the target structure of the suture, including the shape and size of the drainage channel and the side groove. The extrusion speed of the extruder is controlled at 10 to 20 meters per minute, which is adjusted according to the material properties and the size of the suture to ensure that the extruded suture has a stable and continuous shape.

[0072] S4: The suture thread immediately enters the stretching stage after extrusion, and the suture thread is stretched bidirectionally or unidirectionally by the stretching device set at the exit of the extruder. The stretching ratio is usually in the range of 2 to 5 times, and the mechanical properties and surface smoothness of the suture thread are optimized by adjusting the stretching rate and stretching temperature. The stretching temperature is controlled at 90℃ to 110℃ to prevent material brittleness or breakage caused by excessive stretching.

[0073] S5: Open the first drainage groove: use the in-mold forming method or the cutting method. The in-mold forming method is that the shape of the drainage groove is integrated into the mold design, and the drainage groove is formed synchronously during the extrusion process through the precision channel in the mold. The cutting method is to use laser cutting to cut the drainage groove on the suture line after extrusion.

[0074] S6: After stretching, the suture enters the cooling and shaping stage, and the suture is quickly cooled to room temperature (about 20℃ to 25℃) by water bath cooling or air cooling. The cooling speed must be uniform to avoid warping or surface defects of the suture caused by uneven cooling. Water bath cooling usually uses running water to keep the cooling temperature stable.

[0075] S7: After cooling and shaping, the sutures are surface treated and anti-infection, anticoagulant or lubricating coatings are applied as required, using dipping or spraying techniques to ensure uniformity and effective adhesion of the coatings.

[0076] Through the above preparation process, the Figure 3-4 The suture shown has a drainage channel in the middle, and the side grooves penetrate along the longitudinal axis of the suture 1 .

[0077] The size of the suture 1 can be selected according to different surgical areas. The suture 1 of this embodiment is used for suturing the tibialis anterior muscle, etc.

[0078] As the instruction manual Figure 5-6 , Figure 5 The tibialis anterior muscle of New Zealand white rabbits was pulled together and sutured for the suture structure without drainage channel. Figure 6 The suture structure of this embodiment was used to pull and suture the tibialis anterior muscle of New Zealand white rabbits. Figure 5-6 It can be seen that after suturing the surgical area using sutures without drainage channels, all the blood seeping from the surgical area is accumulated in the surgical area, causing local swelling and inflammatory reaction in the surgical area. However, after suturing using single-strand sutures with internal drainage channels, it can be seen that the blood seeping from the surgical area can flow out along the drainage channel, and the blood congestion in the surgical area is drained out of the surgical area to a great extent. This provides a strong condition for the healing of the wound after suturing and avoids the inflammatory reaction caused by blood clot polarization to a great extent.

[0079] Example 2

[0080] As the instruction manual Figure 7 This embodiment is a variation of the suture, and is different from Embodiment 1 in that the openings on the side of the suture 1 are multiple openings 11 arranged along the side of the suture 1, and the multiple openings 11 are connected to the drainage channel 10 inside the suture 1.

[0081] The diameter of each opening 11 is less than 1 / 2 of the diameter of the suture, and the specific size can be adjusted according to the overall diameter of the suture and the application scenario. Smaller pore sizes are suitable for low-exudate environments, while larger pore sizes are suitable for drainage needs of high-exudate or large wounds. In one implementation, the openings 11 are symmetrically arranged along the longitudinal direction of the suture, and the two adjacent rows of openings 11 in the longitudinal direction are staggered. This arrangement ensures that each area can obtain effective drainage support without affecting the overall strength of the suture.

[0082] The multiple openings 11 provide a multi-point drainage path, which is suitable for surgical scenarios with uneven exudate, such as deep tissue or multi-site exudate treatment. Multi-point drainage can more flexibly adapt to the distribution of exudate in the surgical area, effectively reduce fluid accumulation, and improve overall drainage efficiency. The design of the openings 11 can also reduce the pressure of the suture on the surrounding tissue during surgery, reducing pain and discomfort. It is suitable for surgeries that require decentralized drainage.

[0083] Example 3

[0084] As the instruction manual Figure 8This embodiment is a variant of the suture. The structure of the suture 1 is a multi-strand body, and each strand is connected to each other through a connecting portion 12. The connecting portion 12 is arranged along the path of the suture 1. The connecting portion 12 is recessed inward relative to the surface of the body connected thereto, and the recess serves as a drainage channel 10 for draining exudate during surgery. When in use, the suture 1 follows the suture needle into the tissue. Since the suture 1 is a multi-strand body, they can slightly open the needle channel of the tissue. This design ensures that the liquid inside the tissue can be discharged through the recess, reducing the risk of postoperative infection.

[0085] Such a suture may be composed of 2 to 6 strands. For example, in one design, the suture is composed of two solid strands arranged side by side and connected by a connecting portion 12. Such a suture is dumbbell-shaped in cross section when no force is applied. The connecting portion 12 may be in different shapes, for example, the upper and lower end surfaces of the connecting portion 12 may be flat, or may be curved.

[0086] It should be noted that the preparation process of the suture 1 of the structure of this embodiment (melting and plasticizing raw materials, extrusion molding, stretching, cooling and shaping) is the same as the preparation process of the suture 1 of Example 1. The preparation of the suture 1 of this embodiment can be achieved by replacing the molding die in the extruder. Fig. 9 Suture lines shown.

[0087] The size of the suture 1 can be selected according to different surgical areas. The suture 1 of this embodiment can be used for suturing mucosa, skin, organs, etc. according to its thickness and tensile strength.

[0088] As the instruction manual Figure 5 and 10 , Figure 5 The tibialis anterior muscle of New Zealand white rabbits was pulled together and sutured for the suture structure without drainage channel. Fig.10 The suture structure of this embodiment was used to pull and suture the tibialis anterior muscle of New Zealand white rabbits. Figure 5 and Fig.10 It can be seen that after suturing the surgical area using sutures without drainage channels, all the blood seeping from the surgical area is accumulated in the surgical area, causing local swelling and inflammatory reaction in the surgical area. However, after suturing using double-strand sutures with drainage channels on the surface of the suture body, it can be seen that the blood seeping from the surgical area can flow out along the drainage channels on the upper and lower sides, and the blood congestion in the surgical area is drained out of the surgical area to a great extent. This provides a strong condition for the healing of the wound after suturing and avoids the inflammatory reaction caused by blood clot polarization to a great extent.

[0089] Example 4

[0090] As the instruction manual Fig.11 As shown, Fig.11This is a variation of Example 3. The suture 1 of this embodiment is formed by fusing three solid strands. The cross-section of this suture is shaped like a triangle with a dome. Similar to Example 3, each strand is also connected to each other through a connecting portion 12. The connecting portion 12 is recessed inward relative to the surface of the strand connected thereto, forming three drainage channels 10. When the suture 1 follows the suture needle into the tissue, the outer edges of the three strands are used to open the needle channel inside the tissue, ensuring that the liquid in the needle channel can be discharged smoothly through the three drainage channels 10.

[0091] It should be noted that the preparation process of the suture 1 of the structure of this embodiment (melting and plasticizing of raw materials, extrusion molding, stretching, cooling and shaping) is the same as the preparation process of the suture 1 of Example 1. The preparation of the suture 1 of this embodiment can be achieved by replacing the molding mold in the extruder.

[0092] The size of the suture 1 of this embodiment can be selected according to different surgical requirements. The suture of this design can be used in various surgeries according to its thickness and tensile strength, such as for suturing mucosa, skin and internal organs. It can not only suture wounds, but also effectively drain exudate during surgery, helping wounds heal faster.

[0093] Example 5

[0094] As the instruction manual Fig.12 , Fig.12 This is another variation of Example 1. In this embodiment, the suture 1 of this embodiment has the same main structure as that of Example 1, both of which are designed as a single-strand body. An opening is provided in the middle of the suture body along the length direction of the suture to drain exudate during surgery.

[0095] Suture side wings 13 extending outward are respectively provided on both sides of the opening of the suture body. Each side wing extends from one end to the other end along the longitudinal length of the suture body to form a continuous structure. The suture side wings can slightly open the surrounding soft tissue through their external expansion to form a more spacious drainage path. This opening effect reduces the direct pressure of the suture on the surrounding tissue and reduces the direct contact area between the outer surface of the suture and the tissue.

[0096] The bottom of the suture side wing 13 is recessed inward at the junction with the outer surface of the suture body. Although the recess is not directly connected to the opening, it can serve as part of the surface drainage path, forming a slight negative pressure environment, guiding part of the exudate to flow along the outer surface of the suture 1, and assisting in promoting the discharge of tissue fluid. This design can reduce liquid retention and reduce the risk of infection in a sterile environment.

[0097] Example 6

[0098] As the instruction manual Figure 13-15 The present invention also provides a surgical suturing instrument, which includes a suture needle 3 connected to a suture thread, and a transition portion 2 connecting the suture thread and the suture needle 3.

[0099] The surface of the suture needle 3 has one or more guide grooves 30 extending longitudinally, which start from the vicinity of the needle head and extend all the way to the needle tail. The design purpose of the guide grooves 30 is to help drain excess liquid, such as exuded blood, during the suturing process to prevent these liquids from staying in the surgical site. This can keep the surgical field clear and avoid affecting the surgical process. These guide grooves 30 can also reduce the negative pressure effect of the tissue around the suture line on the suture needle, making the needle threading process smoother.

[0100] The suture may be a conventional suture or any one of the sutures with drainage function in the above embodiments 1 to 5. The use of the suture with drainage function helps to drain exudate during surgery and reduce postoperative complications.

[0101] The transition part connecting the suture needle and the suture is designed to taper from the suture needle end to the suture end. This design can enhance the stability of the connection, reduce the sudden transition between the suture and the needle body, and prevent the leakage of blood or tissue fluid caused by the mismatch of the connection parts. The diameter of the transition part is slightly larger than the suture, so that the suture can smoothly pass through the transition part into the surgical area.

[0102] Optionally, the cross section of the suture needle 3 can be circular, triangular, oval or spade-shaped, and these shapes help the needle holder to clamp the suture needle 3 more firmly during surgery, and it is not easy to slip off or deviate. As required, the suture needle can also be straight or curved, and the curvature of the curve can be 1 / 4 arc, 3 / 8 arc, 1 / 2 arc, 5 / 8 arc, etc., to adapt to different surgical needs.

[0103] Optionally, the arrangement of the guide groove 30 can be unilateral arrangement, bilateral symmetrical arrangement, three-sided arrangement, surrounding arrangement, multi-segment distributed arrangement and a combination of the above multiple arrangements according to the cross-section of the suture needle 3. Unilateral arrangement means that the guide groove is located on one side of the suture needle, extending from near the needle head to the needle tail. The unilateral arrangement can effectively guide the liquid to be discharged from the surgical site, which is suitable for surgical scenes requiring a small amount of drainage. Bilateral symmetrical arrangement means that two guide grooves are symmetrically arranged on both sides of the suture needle and extend along the curved surface of the suture needle. This arrangement can increase the drainage efficiency, is suitable for surgical scenes with more exudate, can provide a more balanced drainage effect, and effectively avoid the deviation and unevenness that may be caused by unilateral drainage. The three-sided arrangement means that the guide grooves are respectively arranged on the three surfaces of the suture needle to form a multi-faceted drainage design to ensure that the liquid can be drained smoothly regardless of how the rotation angle of the suture needle changes during the operation. The surrounding arrangement means that the guide groove is arranged in a spiral shape on the surface of the suture needle, extending from the needle head to the needle tail. This design can provide a continuous drainage path during the needle threading process without being restricted by direction. The multi-segment distributed layout is to arrange the guide grooves on the surface of the suture needle in multiple segments to form an interval drainage path. There is a certain interval between each section of the guide groove to reduce the weakening of the needle body. The above multiple layout forms can also be combined to arrange the guide grooves into a complex form that meets the specific surgical requirements according to the surgical requirements and the design characteristics of the suture needle.

[0104] The method of using the surgical suturing instrument of this embodiment:

[0105] Step 1: Hold the needle holder with your right hand to grasp the back 1 / 3 of the needle body, and use the forceps with your left hand to extract the tissue to be sutured.

[0106] Step 2: After aligning the needle tip with the insertion point, insert the needle perpendicular to the suture tissue. Rely on the external rotation force of the wrist to rotate the needle holder in situ. Insert the needle along the arc of the suture needle and exit at the corresponding symmetrical point on the opposite side.

[0107] The type of suture needle 3 can be selected according to the space and environment exposed by different surgical sites. When the surgical site is the skin, eye, blood vessel, nerve and other areas, a 3 / 8 arc needle type can be selected for suturing. When the surgical site is the gastrointestinal tract, muscle and other areas, a 1 / 2 arc needle type can be selected for suturing. When the surgical site is the pelvic cavity, urogenital tract and other areas, a 5 / 8 arc needle type can be selected for suturing. When the surgical site is the eye, oral cavity and other areas, a compound curved needle can be selected for suturing.

[0108] Step 3: After the suture needle 3 passes through the tissue, continue to guide the transition part 2 through the tissue. Since the cross-section of the transition part 2 gradually narrows from the end of the suture needle 3 to the end of the suture line 1, the transition part 2 extending along the longitudinal axis of the suture needle 3 will pass through the pierced tissue during the pulling and suturing process and support the larger opening at the pierced tissue.

[0109] Step 4: Continue to pull the suture needle 3 through the tissue, so that the suture 1 after the transition part 2 can also pass through the punctured tissue and stay in the body. The drainage channel 10 on the suture 1 guides the blood and tissue fluid in the surgical area to flow out of the body along the suture 1. The suture 1 is knotted and cut to complete the suturing.

[0110] The above is only an embodiment of the present invention, and the common sense such as the known specific structure and characteristics in the scheme is not described in detail here. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the attached claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A suture with drainage function, characterized in that: The suture (1) comprises a suture body; A drainage channel (10) is provided in the middle or side of the suture body and runs through along the length direction thereof; The drainage channel (10) is in communication with the tissue needle track and is used to drain liquid exuded from the tissue needle track and the suture area.

2. The suture with drainage function according to claim 1, characterized in that: The structure of the suture (1) is a single-strand or multi-strand structure; The single-strand suture thread (1) is provided with an opening on its side that is connected to the drainage channel (10) and the tissue needle channel, and the opening is used to drain the liquid in the tissue needle channel and the suture area to the drainage channel (10); The multiple strands of the suture (1) are connected to each other via a connecting portion (12), and the connecting portion (12) is arranged along the path of the suture (1); the connecting portion (12) is recessed inwardly relative to the surface of the thread connected thereto, and the recess serves as a drainage channel (10); the number of the multiple strands is 2-6.

3. The suture with drainage function according to claim 2, characterized in that: The opening is a plurality of openings (11) distributed along the outer surface of the suture (1), or a side groove penetrating along the longitudinal axis of the suture (1); When the opening of the suture thread (1) of the single-strand body is a side groove, the opening angles of the edges on both sides of the cross section of the suture thread are greater than 0° and less than 180°.

4. The suture with drainage function according to claim 2, characterized in that: When the suture line (1) is in a straight line state, the drainage channel (10) extends along the longitudinal axis direction of the suture line (1).

5. The suture with drainage function according to claim 2, characterized in that: The opening edge of the single-strand suture (1) has suture side wings (13) extending outwards, and the suture side wings (13) extend from one end to the other end along the longitudinal axis direction of the suture body.

6. The suture with drainage function according to claim 2, characterized in that: The cross-sectional shape of the drainage channel (10) of the single-strand wire body includes one of a crescent shape, a semicircular shape, a square shape, and an elliptical shape.

7. The suture with drainage function according to claim 1, characterized in that: The material of the suture (1) includes non-degradable materials and / or biodegradable materials; the non-degradable materials include one or more of nylon, polytetrafluoroethylene, polyester fiber, stainless steel, nickel-chromium alloy, titanium and titanium alloy; the biodegradable materials include one or more of polyacetic acid, polylactic acid-glycolic acid copolymer, polyglycolic acid-ethyl ester, magnesium and magnesium alloys, iron and iron alloys, zinc and zinc alloys.

8. The suture with drainage function according to claim 1, characterized in that: The inner and outer surfaces of the suture (1) are coated with a hydrophobic coating containing anti-infective drugs and anticoagulant drugs; Or coated with a hydrophilic coating containing anti-infective drugs and anticoagulant drugs.

9. A surgical suturing instrument, characterized in that: The surgical suturing instrument comprises a suturing needle (3) connected to a suture thread; the suturing needle (3) is provided with at least one guide groove (30); The surgical suturing instrument may use the suture with drainage function described in any one of claims 1 to 8, or a conventional suture.

10. The surgical stapling instrument according to claim 9, characterized in that: The guide groove (30) is longitudinally arranged on the surface of the needle body of the suture needle (3); the guide groove (30) starts from the part of the needle body close to the needle head, extends smoothly along the curved surface of the suture needle and passes through the needle body to the needle tail.

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