Flat nylon rope for purse-string suture under endoscope

Abstract

The utility model relates to the technical field of medical apparatus and instruments, and discloses a flat nylon rope for purse-string suture under an endoscope, which comprises a flat annular nylon rope body, the length of the flat annular nylon rope body is matched with the edge of a wound surface, and the flat annular nylon rope body is made of a high-strength and high-flexibility medical nylon material; the elastic fixing buckle is detachably connected with the flat annular nylon rope body and is used for fixing after the nylon rope is tightened; according to the flat cross section design, when the tissue clamp is used for clamping, the tissue clamp can be kept in the direction perpendicular to the wound surface, and therefore the suturing stability and uniformity are improved. The stability and success rate of purse-string suture under the endoscope are improved, the operation difficulty is lowered, the operation time is shortened, meanwhile, the suture sealing performance is enhanced, and the risk of postoperative complications is reduced.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to a purse-string suturing technique used under endoscopy. Background Art

[0002] Purse-string suturing is widely used in digestive endoscopic surgery, especially when treating larger wounds. Traditional purse-string suturing typically uses a round nylon cord in conjunction with a tissue clamp. While this method has achieved some success in clinical practice, it also presents some technical challenges that need to be addressed:

[0003] Insufficient suture stability: When using round nylon rope for purse-string suture, the tissue clamp is prone to falling and turning when clamping the nylon rope and the wound edge. This not only increases the difficulty of operation, but may also lead to unstable suture and affect the surgical effect.

[0004] High operational complexity: Because tissue clips are prone to falling and turning, doctors need to frequently use foreign body forceps to adjust the direction of multiple tissue clips during the suturing process. This greatly increases the complexity of the operation, prolongs the operation time, and also increases the risk of surgical failure.

[0005] Poor suturing uniformity: Traditional round nylon ropes make it difficult to ensure that all tissue clips are oriented in the same direction, which may lead to uneven suturing and affect the healing effect of the wound.

[0006] Poor sealing: Due to inconsistent tissue clip directions, it is often difficult to achieve an ideal sealing effect when using traditional purse-string suturing methods, which may increase the risk of postoperative complications.

[0007] Poor wound healing environment: Existing nylon ropes lack the active promotion effect on wound healing and cannot provide sustained therapeutic effects for the wound.

[0008] Difficulty in postoperative observation: Traditional nylon ropes are difficult to identify during postoperative endoscopic examination, which increases the difficulty of postoperative follow-up.

[0009] These technical issues seriously affect the effectiveness and efficiency of purse-string suturing, increase surgical risks, and place additional operational burdens on surgeons. Therefore, a new purse-string suturing tool is urgently needed that can improve suture stability and uniformity, simplify the operation process, improve sealing effects, optimize the wound healing environment, and facilitate postoperative observation.

[0010] In this context, developing a new type of nylon rope that can overcome the above technical problems has become an important research direction in the field of digestive endoscopy. Utility Model Content

[0011] The purpose of the utility model is to provide a flat nylon rope for endoscopic purse-string suturing to solve the problems raised in the above background technology.

[0012] The present application discloses a flat nylon rope for endoscopic purse-string suturing, characterized by comprising:

[0013] A flat, looped nylon rope body, the flat, looped nylon rope body having a length adapted to the edge of the wound surface and made of high-strength, high-flexibility medical-grade nylon material;

[0014] an elastic fixing buckle detachably connected to the flat ring-shaped nylon rope body, used for fixing the nylon rope after tightening;

[0015] The cross section of the flat ring-shaped nylon rope body is flat, and its width to height ratio is between 2:1 and 5:1.

[0016] The flat cross-section design enables the tissue clip to remain perpendicular to the wound surface when clamped, thereby improving the stability and uniformity of suturing.

[0017] In a preferred embodiment, the cross section of the flat annular nylon rope body is an asymmetrical flat shape and a variable cross-section structure, wherein:

[0018] The cross-section of the asymmetrical flat shape includes a wider upper surface and a narrower lower surface, and the ratio of the width of the upper surface to the width of the lower surface is between 1.2:1 and 2:1;

[0019] The variable cross-section structure changes gradually along the circumference of the nylon rope body, and has different cross-sectional dimensions at different positions of the nylon rope body, wherein the ratio of the maximum cross-sectional area to the minimum cross-sectional area is between 1.5:1 and 3:1;

[0020] The asymmetric flat shape and variable cross-section structure are achieved by adjusting the distribution of the nylon material during the molding process, so that the nylon rope body has different rigidity and flexibility at different positions;

[0021] Through the design, differentiated support forces are provided according to the needs of different parts of the wound surface, thereby improving the clamping stability of the tissue clip and adapting to the thickness and tension of different tissues during the suturing process.

[0022] In a preferred example, the surface of the flat annular nylon rope body is formed with a uniformly distributed micro-concave-convex texture structure through a laser etching process, wherein the protrusion height of the micro-concave-convex texture structure is 5-50 μm and the pit depth is 5-50 μm, which is used to increase friction with tissue and promote tissue healing.

[0023] In a preferred example, a drug release system is provided inside the flat annular nylon rope body, which includes: a microporous structure evenly distributed in the nylon material, with a micropore diameter of 1-10 μm; a drug mixture loaded in the micropores, which contains a drug selected from the following group: anti-inflammatory drugs, antibiotics, and growth factors that promote wound healing. Through this drug release system, a therapeutic effect is continuously provided to the wound during the suturing process, inflammatory response is reduced, infection is prevented, and tissue regeneration and wound healing are promoted.

[0024] In a preferred embodiment, the surface of the flat annular nylon rope body is provided with a fluorescent marker for postoperative endoscopic observation.

[0025] In a preferred embodiment, the asymmetric flat cross-section is combined with the microscopic concave-convex texture structure to reduce the falling and turning of the tissue clip used in conjunction therewith, thereby improving the stability and reliability of suturing.

[0026] Compared with the prior art, the present invention has at least the following differences and effects:

[0027] 1) Improved suturing stability: The flat design maintains the tissue clip perpendicular to the wound surface during clamping, reducing the clip's tendency to fall or turn, and improving suturing stability. The asymmetric flat shape and variable cross-section provide differentiated support for different areas of the wound, further improving the clip's clamping stability.

[0028] 2) Improved suturing uniformity: The flat structure ensures that all tissue clips face in the same direction, helping to achieve a more uniform suturing effect. The variable cross-section design allows the nylon rope to better adapt to the thickness and tension of different tissues, facilitating a uniform suturing effect.

[0029] 3) Enhanced operational convenience: Since the tissue clip is less likely to fall over or turn, the need to adjust the direction of the tissue clip during operation is reduced, which may shorten the operation time. This improves the clipping success rate and may reduce the difficulty of operation.

[0030] 4) Optimizing the wound healing environment: Surface microstructures with concave and convex textures may increase friction with tissue, helping to maintain suture stability. Drug delivery systems (if employed) can provide sustained local therapeutic effects, potentially reducing inflammation, preventing infection, and promoting tissue regeneration and wound healing.

[0031] 5) Improved sealing: Since the tissue clips are arranged more uniformly, the sealing of the suture may be improved.

[0032] 6) Convenience of postoperative observation: Surface fluorescent marking (if used) can facilitate endoscopic observation of suture status after surgery.

[0033] In summary, the flat nylon rope for endoscopic purse-string suture provided by the utility model has very broad application prospects in the medical field.

[0034] The specification of the present utility model records a large number of technical features, which are distributed in various technical solutions. If all possible combinations of technical features of the present utility model (i.e., technical solutions) are to be listed, the specification will be too lengthy. In order to avoid this problem, the various technical features disclosed in the above-mentioned utility model content, the various technical features disclosed in the various embodiments and examples below, and the various technical features disclosed in the accompanying drawings can be freely combined with each other to form various new technical solutions (these technical solutions are all deemed to have been recorded in this specification), unless such a combination of technical features is technically infeasible. For example, in one example, feature A+B+C is disclosed, and in another example, feature A+B+D+E is disclosed. Features C and D are equivalent technical means that play the same role. Technically, only one of them can be used, and it is impossible to use them at the same time. Feature E can be technically combined with feature C. Then, the solution of A+B+C+D should not be considered as having been recorded because it is technically infeasible, while the solution of A+B+C+E should be considered as having been recorded. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of a flat nylon rope for endoscopic purse-string suturing according to the first embodiment of the present utility model.

[0036] Figure 2 This is a schematic diagram of the use of a flat nylon rope for endoscopic purse-string suturing according to the first embodiment of the present utility model.

[0037] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0038] 10: Flat nylon rope

[0039] 11: Nylon rope body

[0040] 12: Fixed buckle

[0041] 20: tissue clip DETAILED DESCRIPTION

[0042] In the following description, many technical details are provided to help readers better understand this application. However, those skilled in the art will understand that even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in this application can be implemented.

[0043] Description of some concepts:

[0044] Endoscope: A medical device used to examine internal organs of the human body. It transmits images of the body to an external display device via optical fibers or a camera for doctors to use in diagnosis and treatment.

[0045] Purse-string suture: A suturing technique that closes the wound by placing a circular suture around the wound surface. It is often used to treat larger wounds.

[0046] Nylon rope: Rope made of nylon material, with high strength and high flexibility, is widely used in medical, industrial and other fields.

[0047] Tissue clip: A medical device used to fix and clamp tissue, commonly used for suturing and hemostasis operations during endoscopic surgery.

[0048] Buckle: A device used to secure a nylon rope that is elastic and can keep the rope in place after it is tightened.

[0049] Microscopic concave-convex texture structure: The tiny concave-convex structure formed on the surface of the nylon rope through the laser etching process is used to increase the friction between the nylon rope and the tissue and promote tissue healing.

[0050] Drug Release System: A system embedded within the nylon cord that releases drugs through a microporous structure to provide therapeutic effects during the suturing process, reduce inflammation and infection, and promote tissue healing.

[0051] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0052] First embodiment

[0053] See also Figure 1 and Figure 2 The flat nylon rope 10 for endoscopic purse-string suturing of this embodiment comprises:

[0054] A flat, annular nylon rope body 11 has a length adapted to the edge of the wound surface and is made of a high-strength, high-flexibility medical-grade nylon material.

[0055] An elastic fixing buckle 12 detachably connected to the flat ring-shaped nylon rope body 11 is used to fix the nylon rope after tightening it.

[0056] The cross section of the flat annular nylon rope body 11 is flat, and its width to height ratio is between 2:1 and 5:1.

[0057] The flat cross-section design enables the tissue clip 20 to remain perpendicular to the wound surface when clamped using the tissue clip 20, thereby improving the stability and uniformity of suturing.

[0058] More specifically, this embodiment provides a flat nylon cord 10 for endoscopic purse-string suturing. Its innovative structure and features are designed to address the numerous issues encountered with traditional round nylon cords. The flat nylon cord 10 primarily consists of two core components: a flat, circular nylon cord body 11 and a removable, elastic retaining buckle 12.

[0059] The flat, looped nylon cord body 11 is made of high-strength, highly flexible medical-grade nylon, ensuring the product's safety and durability during use. This material selection not only meets the stringent standards for medical devices but also provides the product with the necessary strength and flexibility to operate effectively in complex endoscopic surgical environments. Notably, the length of the nylon cord body 11 is precisely designed to accommodate wound edges of various sizes. This adaptability enables the product to be widely used in endoscopic purse-string suture procedures of varying types and sizes, enhancing its practicality and versatility.

[0060] Another key component of this embodiment is the elastic retaining buckle 12, which is detachably connected to the flat, looped nylon cord body 11. This retaining buckle 12 is designed to quickly and effectively secure the nylon cord once it has been tightened to the desired position during the suturing process. The removable nature of retaining buckle 12 provides operational flexibility, allowing the surgeon to adjust or replace it as needed. Furthermore, its elastic design ensures secure fixation, preventing suture loosening and maintaining optimal suture results.

[0061] The most notable feature of the flat nylon rope 10 is its unique cross-sectional design. Unlike traditional round nylon ropes, the nylon rope body 11 in this embodiment adopts a flat cross-section. Specifically, its aspect ratio is carefully controlled between 2:1 and 5:1. This ratio range, determined through in-depth research and repeated trials, provides sufficient flatness to achieve the desired effect while also ensuring the overall strength and maneuverability of the nylon rope. For example, a 3:1 aspect ratio may be suitable for most standard surgical situations, while a ratio closer to 5:1 may be more suitable for specialized situations requiring extreme stability.

[0062] The core advantage of this flat cross-section design is that it significantly improves the use of the tissue clip 20. When the tissue clip 20 is used to clamp the flat nylon cord 10, the flat structure provides a larger contact area and better support, allowing the tissue clip 20 to naturally maintain a perpendicular orientation to the wound surface. This feature eliminates the problem of the tissue clip 20 tilting or flipping, which is common with traditional round nylon cords, and greatly improves the stability of the suturing process.

[0063] More importantly, because all tissue clips 20 maintain a consistent vertical orientation, suture uniformity is significantly improved. This means that each suture point along the wound edge achieves similar tension and position, resulting in a more regular, more tightly sealed suture line. This uniformity not only improves the immediate outcome of the procedure but also potentially promotes a better healing process and reduces the risk of postoperative complications.

[0064] In summary, the flat nylon cord 10 of this embodiment, through its material selection, sizing, cross-sectional shape, and associated fixing device, provides an innovative solution for endoscopic purse-string suturing. It not only overcomes the limitations of traditional round nylon cords but also improves suturing stability and uniformity, providing doctors with a more reliable and efficient surgical tool. This is expected to significantly enhance the overall quality and success rate of endoscopic purse-string suturing procedures.

[0065] Optionally, the cross section of the flat annular nylon rope body 11 is an asymmetrical flat shape and a variable cross-section structure, wherein:

[0066] The cross-section of the asymmetrical flat shape includes a wider upper surface and a narrower lower surface, and the ratio of the width of the upper surface to the width of the lower surface is between 1.2:1 and 2:1;

[0067] The variable cross-section structure changes gradually along the circumference of the nylon rope body 11, and has different cross-sectional dimensions at different positions of the nylon rope body 11, wherein the ratio of the maximum cross-sectional area to the minimum cross-sectional area is between 1.5:1 and 3:1;

[0068] The asymmetric flat shape and variable cross-section structure are achieved by adjusting the distribution of the nylon material during the molding process, so that the nylon rope body 11 has different rigidity and flexibility at different positions;

[0069] Through the above-described design, differentiated support forces are provided according to the requirements of different parts of the wound surface, thereby improving the clamping stability of the tissue clip 20 and adapting to the thickness and tension of different tissues during the suturing process.

[0070] More specifically, the flat, annular nylon rope body 11 adopts an asymmetrical flat shape and a variable cross-section structure. This design further optimizes the performance of the nylon rope and enables it to better adapt to the complex endoscopic purse-string suture surgical environment.

[0071] First, the asymmetric flat shape is a key innovation of this embodiment. Unlike a simple symmetrical flat shape, the cross-section of the nylon rope in this embodiment includes a wider upper surface and a narrower lower surface. The cleverness of this design is that the ratio of the width of the upper surface to the width of the lower surface is precisely controlled between 1.2:1 and 2:1. For example, if a ratio of 1.5:1 is used, when the width of the upper surface is 3 mm, the width of the lower surface will be 2 mm. This asymmetric design provides the nylon rope with unique mechanical properties. The wider upper surface increases the contact area with the tissue clamp 20, providing better support and stability. At the same time, the narrower lower surface reduces the contact area with the tissue, which may help reduce pressure on the tissue and promote postoperative recovery.

[0072] Secondly, the variable cross-section structure is another important innovative feature. This structure allows the nylon rope body 11 to show a gradual change along its circumference, which means that the cross-sectional dimensions of the nylon rope body 11 are different at different positions. This change is not abrupt, but smooth and gradual, ensuring the continuity and strength of the overall structure. Specifically, the ratio of the maximum cross-sectional area to the minimum cross-sectional area is controlled between 1.5:1 and 3:1. The selection of this range is deliberate. While providing sufficient changes to achieve the desired effect, it also ensures that the nylon rope maintains sufficient strength at any position. For example, if a ratio of 2:1 is adopted, the maximum cross-sectional area may be 6 square millimeters, while the minimum cross-sectional area is 3 square millimeters.

[0073] This asymmetric flat shape and variable cross-section are achieved by precisely controlling the material distribution during the nylon rope molding process. This may involve advanced manufacturing techniques such as precision extrusion or 3D printing. By adjusting parameters during the molding process, such as extrusion speed, temperature distribution, or material flow control, the nylon material can be distributed differently at different locations. This manufacturing method allows the nylon rope body 11 to have different rigidity and flexibility at different locations, resulting in a product with highly customized mechanical properties.

[0074] This complex design offers significant clinical advantages. First, it can provide differentiated support tailored to the needs of different wound locations. For example, areas requiring greater support can utilize the larger cross-sectional area, while areas requiring greater flexibility can utilize the smaller cross-sectional area. This flexibility allows a single nylon cord to adapt to the varying needs of various wound locations, enhancing the overall suture effect.

[0075] Secondly, this design significantly improves the clamping stability of the tissue clip 20. The asymmetric shape provides better support and a larger contact area, allowing the tissue clip 20 to more firmly grip the nylon cord and reducing the risk of the tissue clip 20 slipping or shifting during surgery. This not only improves surgical precision, but also potentially shortens surgical time and reduces the risk of complications.

[0076] Finally, the variable cross-sectional structure allows the nylon cord to better adapt to the thickness and tension of different tissues during the suturing process. For example, when encountering thicker or more tense tissue, the larger cross-sectional area can be used to provide stronger support; while for thinner or more fragile tissue, the smaller cross-sectional area can be used to reduce pressure. This adaptability not only improves the quality of the suture but also has the potential to reduce damage to surrounding tissues and promote better postoperative recovery.

[0077] Overall, this asymmetric flat shape and variable cross-section design represents a significant advancement in endoscopic purse-string suturing technology. It transforms the nylon cord from a simple suturing tool into a highly customizable, intelligent device capable of adapting to complex surgical environments. This design not only improves surgical precision and success rates but also potentially enhances the patient's postoperative recovery experience, opening up new possibilities for endoscopic purse-string suturing.

[0078] Optionally, the surface of the flat annular nylon rope body 11 is formed into a uniformly distributed micro-concave-convex texture structure through a laser etching process, wherein the protrusion height of the micro-concave-convex texture structure is 5-50μm and the pit depth is 5-50μm, which is used to increase friction with tissue and promote tissue healing.

[0079] It should be noted that the asymmetric flat cross-section combined with the microscopic concave-convex texture structure is used to reduce the falling and turning of the tissue clip 20 used therewith, thereby improving the stability and reliability of suturing.

[0080] More specifically, the surface of the flat, looped nylon cord body 11 has been further refined to create a unique microscopic concave-convex texture. This surface treatment not only enhances the functionality of the cord but also creates a synergistic effect with the aforementioned asymmetric flat shape, further improving the product's performance during endoscopic purse-string suturing.

[0081] First, the specific features of the aforementioned microscopic concave-convex texture are created on the nylon rope surface through an advanced laser etching process. The use of laser etching ensures a precise and consistent texture, which is crucial for quality control of medical devices. This process creates a uniformly distributed microstructure across the nylon rope surface, consisting of precisely controlled protrusions and depressions.

[0082] Specifically, the dimensions of these microstructures are carefully designed within a specific range: the height of the bumps and the depth of the dimples are both controlled between 5 and 50 microns. This range was chosen with great deliberation. For example, a bump height and dimple depth of 10 microns might be suitable for most standard surgical situations, while dimensions closer to 50 microns might be more suitable for specialized situations requiring extremely high friction. This micron-scale structure is imperceptible to the naked eye but plays a vital role in functionality.

[0083] This microscopic concave-convex texture is designed for two primary purposes. First, it significantly increases friction between the nylon cord and the surrounding tissue. This enhanced friction plays a critical role during surgery. It prevents the nylon cord from slipping or shifting during suturing, ensuring that each suture point remains in its intended position. This not only improves surgical precision but also reduces the number of adjustments that may be required during surgery, potentially shortening the operation time.

[0084] Secondly, this microstructure may also promote tissue healing. While further clinical research may be needed to fully verify this effect, existing biomedical research indicates that specific surface microstructures can influence cell behavior. In this case, these tiny bumps and depressions may provide a favorable environment for tissue cells to attach and grow. They may stimulate local blood circulation, promote tissue regeneration, and thus accelerate the healing process. This potential pro-healing effect may have a positive impact on reducing the risk of postoperative complications and shortening patient recovery time.

[0085] More notably, this microscopic concave-convex texture cleverly complements the aforementioned asymmetrical flat cross-sectional design. This combined design further enhances the nylon cord's performance, particularly in reducing the tendency of the tissue clip 20 to fall and twist. The asymmetrical flat shape provides fundamental structural support, while the microscopic concave-convex texture adds additional friction and stability at a microscopic level.

[0086] This synergistic effect is demonstrated as follows: When the tissue clip 20 clamps the nylon cord, its asymmetrical flat shape provides a natural positioning and support platform for the clip 20, guiding it to maintain the ideal vertical position. Simultaneously, the microscopic concave-convex texture on its surface increases friction between the clip 20 and the nylon cord, further securing the clip 20 and preventing it from slipping or rotating during surgery. This dual protection mechanism significantly reduces the risk of the clip 20 falling or rotating.

[0087] In this case, this combined design significantly improves suturing stability and reliability. Throughout the surgical procedure, each tissue clip 20 is more securely held in its intended position, even during suture tightening or other procedures. This not only simplifies the surgical procedure and reduces the number of times the surgeon needs to readjust the position of the tissue clip 20, but also ensures a more uniform and precise suturing result.

[0088] From a clinical perspective, this design has the potential to offer numerous benefits. It may shorten surgical time, reduce intraoperative uncertainty, increase surgical success rates, and potentially improve the patient's postoperative recovery experience. This highly stable and reliable suturing method may be a key factor in determining surgical success, particularly in complex or high-risk endoscopic purse-string suturing procedures.

[0089] Overall, this design, combining a microscopic concave-convex texture with an asymmetric flat shape, represents a significant innovation in endoscopic purse-string suturing. It not only addresses key issues with traditional nylon sutures but also opens up new possibilities for improving overall surgical quality and patient outcomes. This application of design principles demonstrates how significant macroscopic improvements can be achieved through carefully designed microstructures, providing an inspiring example for the field of medical device design.

[0090] Optionally, a drug release system is provided inside the flat annular nylon rope body 11, which includes: a microporous structure uniformly distributed in the nylon material, with a micropore diameter of 1-10 μm; a drug mixture loaded in the micropores, which drug mixture contains a drug selected from the following group: anti-inflammatory drugs, antibiotics, and growth factors that promote wound healing. Through this drug release system, a therapeutic effect is continuously provided to the wound during the suturing process, inflammatory response is reduced, infection is prevented, and tissue regeneration and wound healing are promoted.

[0091] More specifically, the flat, looped nylon cord body 11 not only serves as a physical suturing tool but is also designed as an intelligent drug delivery system. This design transforms the nylon cord from a passive surgical aid into a medical device that actively participates in the treatment process, representing a significant breakthrough in the field of medical devices.

[0092] The core of this drug-release system lies in the meticulously designed micropore structure within the nylon rope body 11. These micropores are evenly distributed throughout the nylon material, forming a complex three-dimensional network. The diameter of each micropore is precisely controlled between 1 and 10 microns. This size range was chosen carefully: it is large enough to accommodate a sufficient dose of drug, yet small enough to achieve slow, sustained drug release. For example, micropores with a diameter of 3 microns may be suitable for most standard drug formulations, while micropores closer to 10 microns may be more suitable for situations requiring higher drug loadings.

[0093] The creation of this microporous structure may involve advanced materials science and manufacturing techniques. Possible methods include, but are not limited to, adding soluble particles during the nylon molding process that subsequently dissolve to form pores, using supercritical carbon dioxide foaming technology, or employing nanoscale 3D printing. Regardless of the method used, ensuring uniform distribution and consistent size of the micropores is crucial for achieving controlled and predictable drug release.

[0094] These micropores are loaded with a carefully formulated drug mixture. This mixture can selectively contain a variety of therapeutic compounds, which are mainly divided into three categories: anti-inflammatory drugs, antibiotics, and growth factors that promote wound healing. Anti-inflammatory drugs (such as dexamethasone or ibuprofen) can help control the inflammatory response after surgery and reduce pain and swelling. Antibiotics (such as amoxicillin or cephalosporins) are used to prevent postoperative infection, which is especially important in endoscopic surgery because such surgery is often performed in a non-completely sterile environment. Growth factors that promote wound healing (such as platelet-derived growth factor PDGF or epidermal growth factor EGF) can accelerate tissue regeneration and the wound healing process.

[0095] The choice and ratio of medications are customized based on the specific surgical procedure and patient profile. For example, the proportion of antibiotics might be increased for patients at high risk of infection, while the dosage of growth factors might be increased for those expected to have difficult healing. This flexibility allows the system to adapt to a wide range of clinical needs.

[0096] This drug delivery system works based on a slow, sustained diffusion process. When the nylon string comes into contact with tissue fluid, the drug in the micropores begins to slowly dissolve and diffuse. This process can last from days to weeks, depending on the size of the micropores, the properties of the drug, and local environmental conditions. This long-term, localized drug delivery method has several significant advantages:

[0097] Sustained therapy: Unlike traditional one-time drug delivery, this system can continuously provide therapeutic effects throughout the healing process, maintaining stable drug concentrations.

[0098] Local administration: The drug is released directly at the required location, avoiding the possible side effects of systemic administration while improving the therapeutic effect.

[0099] Personalized treatment: By adjusting the drug formulation and microporous structure, customized treatment plans can be provided for different patients and different surgical types.

[0100] Reduced medical burden: Since the drug is directly integrated into the suture material, it may reduce the additional steps of drug administration and simplify the postoperative care process.

[0101] In practical applications, this system could offer numerous clinical benefits. It could effectively reduce inflammation and alleviate postoperative pain and discomfort. By continuously releasing antibiotics, it could significantly lower the risk of postoperative infection, which is particularly important during endoscopic surgery. Furthermore, the sustained release of growth factors could promote tissue regeneration and wound healing, potentially accelerating patient recovery and improving surgical outcomes.

[0102] Overall, this flat nylon cord 10 with an integrated drug-release system represents a significant innovation in surgical materials. It not only provides a physical suturing function but also actively participates in the postoperative recovery process, opening up new possibilities for improving patient outcomes and reducing the risk of complications. This design approach reflects the trend toward multifunctional and intelligent medical devices and provides an inspiring example for future medical device design.

[0103] Optionally, the surface of the flat annular nylon rope body 11 is provided with a fluorescent marker for postoperative endoscopic observation.

[0104] Specifically, in the above embodiment, the surface of the flat, looped nylon cord body 11 is endowed with a unique feature—a fluorescent marker. This design not only enhances the functionality of the nylon cord but also provides a powerful tool for postoperative monitoring and follow-up, representing a significant advancement in the visualization and tracking of medical devices.

[0105] Fluorescent labeling is achieved by adding specialized fluorescent substances to the surface of the nylon string. These substances may include organic fluorescent dyes, quantum dots, or rare earth element compounds. Several key factors must be considered when selecting a fluorescent substance: first, it must be biocompatible and non-irritating or toxic to human tissue; second, it must produce bright, easily recognizable fluorescence when excited by the endoscopic light source; and finally, it must be sufficiently photostable to maintain its fluorescent properties for extended periods of time to meet the needs of long-term follow-up.

[0106] There are several possible methods for integrating fluorescent materials onto the surface of nylon rope. One possibility is to directly incorporate the fluorescent material during the nylon molding process, making it an integral part of the nylon material. Another approach might be to use surface modification techniques, such as plasma treatment followed by grafting of fluorescent molecules, or to use specialized coating techniques to fix the fluorescent material to the surface of the nylon rope. Regardless of the method used, the key is to ensure that the fluorescent marker is firmly attached to the nylon rope and does not fall off or migrate during use.

[0107] The primary use of this fluorescent marker is to facilitate postoperative endoscopic observation. During postoperative examinations, physicians can use a light source of a specific wavelength to excite the fluorescent substance. Within the endoscopic observation system, the fluorescently labeled nylon string emits a distinct fluorescent signal that contrasts sharply with surrounding tissue. This high-contrast visualization provides physicians with several important advantages:

[0108] Precise positioning of sutures: Fluorescent markers allow doctors to quickly and accurately locate the specific location of sutures. This is particularly useful in complex internal structures and can significantly reduce the time required to find the suture site.

[0109] Suture integrity assessment: By observing the continuity of the fluorescent marker, the doctor can easily determine whether the suture remains intact. If it breaks or becomes loose, the interruption or abnormal distribution of the fluorescent signal will be immediately apparent.

[0110] Monitoring the healing process: By observing changes in the tissue surrounding the fluorescent marker over time, doctors can assess the progress of healing. For example, if the fluorescent signal is gradually covered by new tissue, this may indicate that healing is progressing well.

[0111] Early detection of complications: If infection, inflammation or other complications occur, the tissue surrounding the fluorescent marker may show abnormal morphology or color changes, helping doctors detect problems early.

[0112] Convenient long-term follow-up: Because fluorescent markers can persist for a long time, they facilitate long-term follow-up. Even long after the operation, doctors can easily find the original suture location and evaluate the long-term healing effect.

[0113] Furthermore, this fluorescent marker could be crucial in emergency situations. For example, if a patient experiences sudden symptoms after surgery and needs another surgery, the fluorescent marker could help quickly locate the precise location of the previous surgery, saving valuable time.

[0114] Overall, this flat nylon cord 10 with fluorescent markers not only simplifies the postoperative examination process but also provides doctors with more information, helping to improve the quality and accuracy of patient care. This design concept reflects the trend of medical devices towards intelligent and information-based development, opening up new possibilities for improving patient prognosis and optimizing postoperative management.

[0115] Working principle:

[0116] As an innovative endoscopic purse-string suturing tool, the flat nylon cord 10's operating principle is primarily reflected in its unique structural design and multifunctionality. First, the most notable feature of the flat nylon cord 10 is its flat cross-section. This design provides a larger contact area, allowing the tissue clip 20 to more securely grip the cord and wound edges. When the tissue clip 20 is clamped, its flat structure naturally guides it perpendicular to the wound surface, significantly reducing the possibility of it falling or tilting. This not only improves suturing stability but also ensures that all tissue clips 20 maintain a consistent orientation, resulting in a more uniform and regular suture line.

[0117] Further improvements are the asymmetric flat shape and variable cross-section structure of the flat nylon cord 10. The asymmetric flat shape, characterized by a wider upper surface and a narrower lower surface, provides enhanced mechanical support and further strengthens the stability of the tissue clip 20. Furthermore, the variable cross-section structure allows the nylon cord to exhibit varying rigidity and flexibility at different locations. This ingenious design allows the cord to better adapt to the different locations and tissue characteristics of the wound during suturing, improving suture precision and sealing. Whether suturing delicate mucosal tissue or thicker muscularis, the flat nylon cord 10 provides appropriate support and flexibility.

[0118] Another key innovation is the microscopic concave-convex texture on the surface of the flat nylon cord 10. This carefully designed surface structure increases friction between the cord and tissue, further enhancing suture stability and effectively preventing the cord from slipping during tightening, ensuring that each suture point remains precisely positioned. Furthermore, this microscopic concave-convex texture may slightly stimulate surrounding tissue, promoting local blood circulation and potentially accelerating the healing process.

[0119] In certain embodiments, the flat nylon cord 10 also incorporates an innovative drug-delivery system. This system enables the sustained release of specific drugs, such as anti-inflammatory medications, antibiotics, or growth factors, during and after the suturing process. In this way, the flat nylon cord 10 becomes more than just a simple suturing tool; it also serves as an active therapeutic delivery vehicle. It provides localized, sustained therapeutic action to the wound surface, helping to control inflammation, prevent infection, and promote tissue regeneration. Because the drug is delivered directly to the suture site, this design enables more precise drug delivery while reducing the need for systemic medications and their potential side effects.

[0120] To facilitate postoperative observation and assessment, some versions of the flat nylon cord 10 feature fluorescent markings. These markings, visible under specific lighting conditions, allow the surgeon to easily observe the suture progress through an endoscope after surgery. This feature significantly enhances postoperative monitoring and helps promptly identify potential complications, such as suture loosening or local infection, thereby ensuring a quality postoperative recovery for the patient.

[0121] These innovative designs of the flat nylon cord 10 not only improve suturing quality and reliability but also significantly optimize the entire surgical procedure. Because the tissue clip 20 is less likely to fall over or rotate, the surgeon's need to adjust the clip's orientation during surgery is significantly reduced. This design simplifies the surgical process, potentially shortening surgical time and reducing surgical difficulty. Furthermore, by enhancing suturing stability and uniformity, the flat nylon cord 10 design improves the overall success rate of purse-string suturing.

[0122] Overall, the flat nylon cord 10, through its innovative structural design and multifunctional properties, effectively addresses several technical issues encountered with traditional round nylon cords in endoscopic purse-string suturing. It provides a more efficient, stable, and wound-healing suturing solution, representing a significant advancement in the field of digestive endoscopic surgical instruments.

[0123] The above embodiments have the following technical effects:

[0124] 1) Improved Suturing Stability: The flat design ensures that the tissue clip 20 remains perpendicular to the wound surface during clamping, reducing the risk of the clip 20 tipping over or turning, and improving suturing stability. The asymmetric flat shape and variable cross-section provide differentiated support for different areas of the wound, further improving the clamping stability of the tissue clip 20.

[0125] 2) Improved suturing uniformity: The flat structure ensures that all tissue clips 20 face in the same direction, helping to achieve a more uniform suturing effect. The variable cross-section design allows the nylon rope to better adapt to the thickness and tension of different tissues, facilitating a uniform suturing result.

[0126] 3) Enhanced operational convenience: Since the tissue clip 20 is not prone to falling or turning, the need to adjust the direction of the tissue clip 20 during operation is reduced, which may shorten the operation time. This improves the clipping success rate and may reduce the difficulty of operation.

[0127] 4) Optimizing the wound healing environment: Surface microstructures with concave and convex textures may increase friction with tissue, helping to maintain suture stability. Drug delivery systems (if employed) can provide sustained local therapeutic effects, potentially reducing inflammation, preventing infection, and promoting tissue regeneration and wound healing.

[0128] 5) Improved sealing: Since the tissue clips 20 are arranged more uniformly, the sealing of the suture may be improved.

[0129] 6) Convenience of postoperative observation: Surface fluorescent marking (if used) can facilitate endoscopic observation of suture status after surgery.

[0130] It should be noted that all documents mentioned in this utility model are incorporated herein by reference, just as if each document was incorporated herein by reference individually. In addition, it should be understood that after reading the above teachings of this utility model, those skilled in the art may make various changes or modifications to this utility model, and that such equivalent forms also fall within the scope of the claims appended hereto.

[0131] Furthermore, in the claims and specification of this patent, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include," "comprise," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a" does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element. In the claims and specification of this patent, if it is mentioned that an action is performed according to an element, it means that the action is performed at least according to the element, which includes two situations: performing the action only according to the element, and performing the action according to the element and other elements.

[0132] Although the present invention has been illustrated and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims

1. A flat nylon rope for endoscopic purse-string suture, characterized in that ,include: A flat, looped nylon rope body, the flat, looped nylon rope body having a length adapted to the edge of the wound surface and made of high-strength, high-flexibility medical-grade nylon material; an elastic fixing buckle detachably connected to the flat ring-shaped nylon rope body, used for fixing the nylon rope after tightening; The cross section of the flat ring-shaped nylon rope body is flat, and its width to height ratio is between 2:1 and 5:

1. The flat cross-section design enables the tissue clip to remain perpendicular to the wound surface when clamped.

2. The flat nylon rope for endoscopic purse-string suturing according to claim 1, characterized in that: The cross section of the flat annular nylon rope body is an asymmetrical flat shape and a variable cross-section structure, wherein: The cross-section of the asymmetrical flat shape includes a wider upper surface and a narrower lower surface, and the ratio of the width of the upper surface to the width of the lower surface is between 1.2:1 and 2:1; The variable cross-section structure changes gradually along the circumference of the nylon rope body, and has different cross-sectional dimensions at different positions of the nylon rope body, wherein the ratio of the maximum cross-sectional area to the minimum cross-sectional area is between 1.5:1 and 3:1; The asymmetric flat shape and variable cross-section structure are achieved by adjusting the distribution of the nylon material during the molding process, so that the nylon rope body has different rigidity and flexibility at different positions.

3. The flat nylon rope for endoscopic purse-string suturing according to claim 2 is characterized in that The surface of the flat ring-shaped nylon rope body is formed with a uniformly distributed micro-concave-convex texture structure through a laser etching process. The convex height of the micro-concave-convex texture structure is 5-50μm, and the pit depth is 5-50μm.

4. The flat nylon rope for endoscopic purse-string suturing according to any one of claims 1 to 3, characterized in that: A drug release system is provided inside the flat annular nylon rope body. The system comprises: a microporous structure uniformly distributed in the nylon material, with the micropore diameter being 1-10 μm; and a drug mixture loaded in the micropores.

5. The flat nylon rope for endoscopic purse-string suturing according to claim 1, characterized in that: The surface of the flat annular nylon rope body is provided with a fluorescent mark.

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