Medical stent

Abstract

This application relates to a medical stent. The medical stent is configured for reshaping the connection between a first tissue and a second tissue. The medical stent includes: a first support member configured to be fitted onto and support the first tissue portion, the first support member being selected according to the size of the first tissue portion; a second support member configured to be fitted onto and support the second tissue portion, the first and second support members being separate structures; and a first connector connecting the first and second support members. This medical stent designs the first and second support members as separate structures, achieving coverage and fixation of the first and second tissue portions respectively through their fitted support. During surgery, different axial dimensions of the first support member can be flexibly selected according to the individual anatomical differences of the patient, allowing the overall axial dimensions of the stent to adapt to the anatomical characteristics of different patients, thus improving the stent's versatility and adaptability.

Description

Technical Field

[0001] This application relates to the field of urological implantable medical devices, and in particular to medical stents. Background Technology

[0002] In radical prostatectomy (RP), after the prostate is removed, the bladder end and urethral end need to be reanastomosed to restore the continuity of the urinary tract.

[0003] In related technologies, a medical stent is placed at the bladder end and the urethral end. After suturing the bladder end and the urethral end, the stent is used to cover the suture site of the bladder end and the urethral end to help improve the stability of the anastomosis between the bladder end and the urethral end.

[0004] However, there is only one type of medical stent in the relevant technology, which is difficult to adapt to the anatomical differences of different patients. Summary of the Invention

[0005] Therefore, it is necessary to provide a new type of medical stent to address the problem that having only one model of medical stent makes it difficult to adapt to the anatomical differences of different patients.

[0006] A medical stent configured for remodeling the connection between a first tissue portion and a second tissue portion, the medical stent comprising:

[0007] A first support member is configured to be fitted onto the first tissue portion and to support the first tissue portion, wherein the first support member is selected according to the size of the first tissue portion.

[0008] The second support member is configured to be fitted onto the second tissue portion and to support the second tissue portion. The first support member and the second support member are separate structures.

[0009] The first connector is connected to the first support and the second support.

[0010] The medical stent is designed with the first support and the second support as separate structures. The first and second tissue parts are covered and fixed by the two supporting each other. During the operation, the first support with different axial dimensions can be flexibly selected according to the individual anatomical differences of the patients, so that the overall axial dimensions of the stent can be adapted to the anatomical characteristics of different patients, thus improving the versatility and adaptability of the stent.

[0011] In one embodiment, the first connector is a deformable structure, which allows the first connector to flexibly deform and adaptively adjust according to the local tissue morphology, tissue tension and the alignment angle of the broken ends during the operation. This buffers the tensile stress between tissues during the activity, avoids compression, wear or misalignment of the anastomosis ends caused by rigid connection, and can adapt to the micro-movement changes of the body tissue after the operation, reduce the risk of anastomotic tearing, further improve the fit and safety of the stent after implantation, and ensure stable healing of the anastomotic tissue.

[0012] In one embodiment, the first connector has a variable radial dimension, thereby enabling it to have a certain degree of elastic deformation in the radial direction. This allows the first connector to be adjusted in real time according to the radial dimension between the bladder anastomosis end and the urethral anastomosis end, as well as the compression state of the surrounding soft tissue. This flexibly adapts to the differences in local anatomical structures among different patients, reasonably controls the tightness of the fit and the support gap between the two tissue ends, avoids the problem of excessive local compression or loose connection caused by a fixed radial dimension, effectively disperses local stress, improves the fit and conformity of the stent assembly, and provides a stable and suitable healing environment for the anastomosed tissue.

[0013] And / or, the first connector has a variable axial dimension. This allows the first connector to adaptively adjust according to the axial distance between the bladder and urethral anastomoses, the length of tissue defects, and differences in postoperative tissue retraction among different patients. This precisely matches the axial assembly distance between the ends, eliminates traction or loosening problems caused by size mismatch, reasonably buffers axial tensile and compressive stress, ensures stable alignment of the two tissue ends, expands the product's applicability, further enhances the individualized adaptability of the medical stent, and facilitates stable healing of the anastomotic tissue after surgery.

[0014] In one embodiment, the first connector includes:

[0015] Multiple first monofilaments are spaced apart, and at least a portion of the first monofilaments extend along a first direction;

[0016] Multiple second monofilaments are spaced apart, and at least a portion of the second monofilaments extend along a second direction;

[0017] Multiple first monofilaments and multiple second monofilaments are interwoven to form a mesh;

[0018] The first direction and the second direction are set at an angle, the angle being 30°-85°.

[0019] The first connector is formed by interlacing multiple sets of first and second monofilaments to form a mesh structure, and the included angle range of the extension direction of the second monofilament is limited. This allows the first connector to have balanced structural strength and deformation capacity in multiple directions, taking into account both flexible deformation and overall support stability. It can adapt to the micro-movement traction of surrounding tissues at multiple angles, evenly disperse local stress, and avoid stress concentration. The regular woven mesh structure has good air permeability, which facilitates the infiltration and growth of new tissue and improves the tissue fusion effect. At the same time, the reasonable included angle design can optimize the mechanical distribution of the woven structure, enhance the tensile and bending resistance of the first connector, and further improve the adaptability, tolerance and long-term stability of the stent after implantation.

[0020] In one embodiment, the two ends of each first monofilament are connected to the end of the second monofilament, and the two ends of each second monofilament are connected to the end of the first monofilament;

[0021] At the intersection of the middle position of the first monofilament and the middle position of the second monofilament, there are multiple intersection positions between the first monofilament and the second monofilament, wherein the first monofilament and the second monofilament are movably connected at at least some of the intersection positions.

[0022] The first connector is interconnected at the ends of the second monofilaments, thereby fixing each first monofilament and each first-page second monofilament, so that multiple first monofilaments and multiple second monofilaments are woven to form the first connector structure. Multiple intersection points employ a movable connection design, giving the first connector weave network flexible adjustment margins. It can freely fine-tune the deformation angle and mesh opening when subjected to multi-angle and multi-directional external forces of tension and compression, further enhancing the radial and axial adaptive deformation capabilities, effectively buffering the composite stress generated by the weave movement, and avoiding localized compression and stress concentration caused by the rigid locking of the weave structure.

[0023] In one embodiment, the movable connection includes at least one of a rotatable connection, a physical fit and surgical suture connection, and a clamping device.

[0024] The first connector, by limiting various forms of movable connection, can flexibly adapt to the assembly requirements of the warp and weft braided structure of the first connector, enabling each intersection point to achieve rotational fine adjustment, flexible fit and controllable limit, enriching the deformation adjustment forms of the first connector, releasing structural mobility margin from multiple angles, and effectively adapting to the complex micro-motion state of tissues during surgery and postoperatively.

[0025] In one embodiment, the first connector is a flexible wire, which is alternately threaded through the first support and the second support to connect the first support and the second support.

[0026] The first connector can be a surgical suture. After the operator sutures the bladder end and the urethral end, the first support and the second support are placed in their respective positions. Then, the surgical suture is alternately passed through the first support and the second support to connect them. Simultaneously, to ensure that the first connector has radial and axial displacement, a preset distance is maintained between the first support and the second support sutured by the surgical suture.

[0027] In one embodiment, the medical stent further includes a second connector, the second connector being used for at least one of the following:

[0028] The second connector is used to connect the first support member and the first connector, and to connect the second support member and the first connector;

[0029] The second connector is used to connect the first support member and the first tissue section;

[0030] The second connector is used to connect the second support member and the second tissue section;

[0031] The second connector includes at least one of surgical sutures and clamps.

[0032] The second connector enables the connection between the first support member and the first connector, and between the second support member and the first connector, thereby improving the stability of the medical stent structure. The second connector can also be used to connect the first support member to tissue, and the second support member to tissue, to ensure the stability and effectiveness of the fit between the first and second support members and the tissue.

[0033] In one embodiment, the medical stent has an axial dimension of 8mm-25mm.

[0034] Limiting the overall axial length of medical stents to a reasonable range of 8mm-25mm can cover the differences in urinary system anatomy among different patients and the clinical needs of different surgical wounds and tissue defect lengths. The reasonable size range allows for individualized selection and fitting, effectively avoiding the problems of excessively long stents causing compression and stimulation of surrounding normal tissues or excessively short stents causing insufficient support and coverage of the anastomosis area. This improves the universality and adaptability of stents, ensures full coverage and stable support of the anastomosis ends, and facilitates orderly tissue repair and healing after surgery.

[0035] In one embodiment, the first support member includes:

[0036] The equal-diameter portion has one end for connection with the first connector, and the equal-diameter portions are identical along the axial direction.

[0037] The variable diameter section has one end connected to the end of the equal diameter section opposite to the first connector, and the diameter of the variable diameter section gradually increases in the direction away from the equal diameter section.

[0038] The first support can conform to the contour of the tissue at the end of the bladder to improve the support effect. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of a medical stent provided in one embodiment of this application. Figure 1 .

[0040] Figure 2 This is a schematic diagram of the structure of a medical stent provided in one embodiment of this application. Figure 2 .

[0041] Explanation of reference numerals in the attached figures:

[0042] 100 - First support member; 110 - Constant diameter section; 120 - Variable diameter section;

[0043] 200 - Second support component;

[0044] 300 - First connector; 310 - First monofilament; 320 - Second monofilament; 330 - Crossing point. Detailed Implementation

[0045] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0046] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0047] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0049] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0050] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0051] See Figures 1-2 , Figure 1 A schematic diagram of the structure of a medical stent provided in one embodiment of this application is shown. Figure 1 . Figure 2 A schematic diagram of the structure of a medical stent provided in one embodiment of this application is shown. Figure 2 .

[0052] like Figures 1-2This embodiment provides a medical stent configured for reshaping the connection between a first tissue portion and a second tissue portion. Exemplarily, this medical stent can be applied in a radical prostatectomy procedure, whereby, after prostatectomy, the stent enables the anastomosis reconstruction of the bladder neck and urethral stump, thereby restoring the continuous conductivity of the urinary tract.

[0053] The medical stent includes a first support member 100, a second support member 200, and a first connector 300. The first support member 100 is configured to be fitted onto a first tissue portion and to support the first tissue portion, thereby forming a covering and fixing effect on the first tissue portion. The first support member 100 is selected according to the size of the first tissue portion, allowing for flexible selection of first support members 100 with different axial dimensions based on the anatomical characteristics of different patients. The second support member 200 is configured to be fitted onto a second tissue portion and to support the second tissue portion, thereby forming a covering and fixing effect on the second tissue portion. The first support member 100 and the second support member 200 are separate structures; the first connector 300 connects the first support member 100 and the second support member 200. The medical stent is designed with the first support 100 and the second support 200 as separate structures. The first and second tissue parts are covered and fixed by the two supporting each other. During the operation, the first support 100 with different axial dimensions can be flexibly selected according to the individual anatomical differences of the patients, so that the overall axial dimensions of the stent can be adapted to the anatomical characteristics of different patients, thereby improving the versatility and adaptability of the stent.

[0054] For example, the first tissue portion is the anastomosis end of the bladder, and the second tissue portion is the anastomosis end of the urethra. This medical stent is used to repair the anastomosis between the bladder neck and the urethral stump after radical prostatectomy. The two anastomosis ends are independently covered, fixed, and mechanically supported by the split first support member 100 and the second support member 200, stabilizing the tissue morphology of the anastomosis area and reducing the risk of tissue traction and displacement. At the same time, the first connector 300 enables precise alignment and connection of the two broken ends, which helps to smoothly reconstruct the urinary tract, effectively improves the postoperative tissue healing efficiency, and reduces the probability of complications such as anastomotic stenosis and urinary leakage. This meets the clinical needs of tissue reconnection and remodeling after surgery in this type of urinary system.

[0055] Optionally, the overall length of the medical stent along the axial direction is 8mm-25mm, and the medical stent is available in various sizes within this range. Here, the axial direction refers to the extension direction of the central axis of the medical stent. For example, the overall length of the medical stent along the axial direction includes various sizes such as 8mm, 10mm, 12mm, 14mm, 15mm, 17mm, 19mm, 20mm, 22mm, 23mm, and 25mm.

[0056] Limiting the overall axial length of medical stents to a reasonable range of 8mm-25mm can cover the differences in urinary system anatomy among different patients and the clinical needs of different surgical wounds and tissue defect lengths. The reasonable size range allows for individualized selection and fitting, effectively avoiding the problems of excessively long stents causing compression and stimulation of surrounding normal tissues or excessively short stents causing insufficient support and coverage of the anastomosis area. This improves the universality and adaptability of stents, ensures full coverage and stable support of the anastomosis ends, and facilitates orderly tissue repair and healing after surgery.

[0057] Optionally, the medical stent may be made entirely of absorbable polymer materials, such as polydioxanone, polycaprolactone, and polylactic acid. Using the same material throughout the stent helps ensure consistency in the degradation rates of the first support 100, the second support 200, and the first connector 300. This effectively avoids interfacial stress, uneven local degradation, and tissue irritation problems caused by inconsistent degradation cycles and rates when using multiple materials in combination. It also improves the overall structural stability and implantation safety of the stent, simplifies material selection and processing, reduces manufacturing costs, and better meets the long-term needs of postoperative tissue repair in the urinary system.

[0058] This embodiment also provides a method for operating a medical stent, which is performed using the medical stent described above, and includes the following steps:

[0059] S1, the second support, the first connector 300 and the first support are sequentially placed on the urethra;

[0060] S2, suture the anastomosis of the bladder against the anastomosis of the urethra;

[0061] S3, the first support member 100 is brought into contact with the bladder end;

[0062] S4, connect the first connector 300 and the first support 100, and connect the first connector 300 and the second support 200.

[0063] The operation method of this medical stent involves first sequentially placing the second support body, the first connector 300, and the first support body onto the urethra; then suturing the bladder anastomosis end to the urethral anastomosis end; finally, abutting the first support body 100 against the bladder end and connecting the first connector 300 with the first support body 100 and the second support body 200. This allows for the orderly installation and precise positioning of the stent. The support body provides stable coverage and support for the urethra and bladder ends, ensuring a stable connection at the sutured anastomosis end and preventing problems such as anastomotic leakage and poor healing due to tissue displacement or tension changes after suturing. The step-by-step operation reduces the difficulty of the surgical procedure, allowing medical staff to complete the stent installation and tissue anastomosis in a standardized manner, ensuring effective tissue remodeling. It also adapts to individual anatomical differences in patients, further improving surgical safety and postoperative recovery efficiency, and is particularly suitable for the anastomosis reconstruction of the bladder neck and urethral stump after radical prostatectomy. Furthermore, the medical stent uses a single material, which helps reduce manufacturing costs.

[0064] Optionally, the first support 100 and the second support 200 are mesh structures woven from monofilament materials. The overall structure of the first support 100 and the second support 200 is flexible and breathable, combining uniform mechanical support performance with good tissue conformation. This reduces pressure and stimulation on the anastomotic tissue, facilitates tissue fluid penetration and new tissue ingrowth, and promotes tissue adhesion healing. The monofilament woven structure has a smooth surface and good biocompatibility, which can reduce the risk of inflammatory response and foreign body rejection. At the same time, it has strong structural stability and is not prone to deformation and damage, further improving the reliability of the medical stent in the postoperative repair process.

[0065] In one embodiment, the first connector 300 is a deformable structure, which allows the first connector 300 to flexibly deform and adaptively adjust according to the local tissue morphology, tissue tension and the alignment angle of the broken ends during the operation. This buffers the tensile stress between tissues during the activity, avoids compression, wear or misalignment of the anastomosis ends caused by rigid connection, and can adapt to the micro-movement changes of the body tissue after the operation, reduce the risk of anastomotic tearing, further improve the fit and safety of the stent after implantation, and ensure stable healing of the anastomotic tissue.

[0066] In one embodiment, the first connector 300 has a variable radial dimension, thereby enabling it to have a certain degree of elastic deformation in the radial direction. This allows the first connector 300 to be adjusted in real time according to the radial dimension between the bladder anastomosis end and the urethral anastomosis end, as well as the compression state of the surrounding soft tissue. This flexibly adapts to the differences in local anatomical structures of different patients, reasonably controls the tightness of the fit and the support gap between the two tissue ends, avoids the problem of excessive local compression or loose connection caused by a fixed radial dimension, effectively disperses local stress, improves the fit and conformity of the stent assembly, and provides a stable and suitable healing environment for the anastomosed tissue.

[0067] In one embodiment, the first connector 300 has a variable axial dimension. This allows the first connector 300 to adaptively adjust according to the axial distance between the bladder and urethral anastomoses, the length of tissue defects, and differences in postoperative tissue retraction among different patients. This precisely matches the axial assembly distance between the ends, eliminates traction or loosening problems caused by size mismatch, reasonably buffers axial tensile and compressive stress, ensures stable alignment of the two tissue ends, expands the product's applicability, further enhances the individualized adaptability of the medical stent, and facilitates stable healing of the anastomosed tissue after surgery.

[0068] In one embodiment, the dimensions of the first connector 300 are variable in both the radial and axial directions.

[0069] like Figure 2 As shown, in one embodiment, the first connector 300 includes a plurality of first monofilaments 310 and a plurality of second monofilaments 320. The plurality of first monofilaments 310 are spaced apart, and at least a portion of the first monofilaments 310 extend along a first direction. The plurality of second monofilaments 320 are spaced apart, and at least a portion of the second monofilaments 320 extend along a second direction. The plurality of first monofilaments 310 and the plurality of second monofilaments 320 are interwoven to form a mesh. The first direction and the second direction are arranged at an angle of 30°-85°.

[0070] The first connector 300 is formed by interlacing multiple sets of first monofilaments 310 and second monofilaments 320 to form a mesh structure, and the included angle range of the extension direction of the second monofilaments 320 is limited. This allows the first connector 300 to have balanced structural strength and deformation capacity in multiple directions, taking into account both flexible deformation and overall support stability. It can adapt to the micro-movement traction of surrounding tissues at multiple angles, evenly disperse local stress, and avoid stress concentration. The regular woven mesh structure has good air permeability, which facilitates the infiltration and growth of new tissue and improves the tissue fusion effect. At the same time, the reasonable included angle design can optimize the mechanical distribution of the woven structure, enhance the tensile and bending resistance of the first connector 300, and further improve the adaptability, tolerance and long-term stability of the stent after implantation.

[0071] The included angle is 30°-85°, which helps to avoid the situation where the first monofilament 310 or the second monofilament 320 is set parallel to the axis direction, and helps to ensure that the dimensions of the first connector 300 are variable in the axial and radial directions.

[0072] In one embodiment, both ends of each first monofilament 310 are connected to the ends of the second monofilament 320, and both ends of each second monofilament 320 are connected to the ends of the first monofilament 310; at the intersection 330 between the middle position of the first monofilament 310 and the middle position of the second monofilament 320, there are multiple intersection points 330 between the first monofilament 310 and the second monofilament 320, wherein the first monofilament 310 and the second monofilament 320 are movably connected at at least some of the intersection points 330.

[0073] The first connector 300 is interconnected at the ends of the second monofilaments 320, thereby fixing each first monofilament 310 and each first-page second monofilament 320, so that multiple first monofilaments 310 and multiple second monofilaments 320 are woven to form the first connector 300 structure. Multiple intersection points 330 employ a movable connection design, giving the woven network of the first connector 300 flexible adjustment margin. It can freely fine-tune the deformation angle and mesh opening when subjected to multi-angle and multi-directional external forces of tension and compression, further enhancing the radial and axial adaptive deformation capability, effectively buffering the composite stress generated by the weave movement, and avoiding localized compression and stress concentration caused by the rigid locking of the woven structure.

[0074] Furthermore, the movable connection includes at least one of rotatable connection, physical fit, surgical suture connection, and clamping. By defining multiple forms of movable connection, the first connector 300 can flexibly adapt to the assembly requirements of its warp and weft braided structure, enabling each intersection point 330 to achieve rotational fine-tuning, flexible fit, and controllable positioning. This enriches the deformation adjustment forms of the first connector 300, releases structural mobility allowance from multiple angles, and effectively adapts to in-situ shaping during surgery and complex micro-movement states of tissues after surgery.

[0075] The movable connection is a rotatable connection, which enables each intersection 330 to have a pivot. The first monofilament 310 and the second monofilament 320 connected to the pivot can both rotate around the pivot, thus realizing the adjustable performance of the first connector 300 in both axial and radial dimensions.

[0076] When the movable connection is a physical fit, the first monofilament 310 and the second monofilament 320 are not physically connected at the intersection 330 position, and only the connection at both ends is used to form a physical fit. At this time, the first monofilament 310 and the second monofilament 320 are not fixed at the intersection 330 position, so that the first monofilament 310 and the second monofilament 320 are adjustable in axial and radial dimensions.

[0077] Among them, the movable connection is a surgical thread connection, that is, it is fixed by a surgical thread at the intersection 330. Since the fixation of the surgical thread cannot restrict the small-range rotation between the first monofilament 310 and the second monofilament 320, nor can it restrict the first monofilament 310 and the second monofilament 320 to move along the axial direction of their respective monofilaments, the first connector 300 can achieve the performance of adjustable axial and radial dimensions.

[0078] Among them, the movable connection is clamped and fixed by a clamping member. This fixing method is similar to that of the surgical suture connection, that is, it is fixed by a clamping member at the intersection point 330. Since the fixing of the surgical suture cannot restrict the small-range rotation between the first monofilament 310 and the second monofilament 320, nor can it restrict the first monofilament 310 and the second monofilament 320 to move along the axial direction of their respective monofilaments, the first connector 300 can achieve the performance of adjustable axial and radial dimensions.

[0079] It is worth noting that the surgical sutures and clamps are also made of absorbable materials.

[0080] Optionally, the first monofilament 310 and the second monofilament 320 are fixedly connected at a partial intersection point 330, thereby reducing the degree of freedom of the middle position of the first connector 300 and helping to constrain the first connector 300 to have a displacement within a reasonable range.

[0081] Optionally, the displacement range of the first connector 300 is 0.5mm-3mm, and this displacement range can be axial displacement or radial displacement.

[0082] In another embodiment, the first connector 300 is a flexible wire, which is alternately threaded through the first support 100 and the second support 200 to connect them. The first connector 300 can be a surgical suture. After the operator sutures the bladder end and the urethral end, the first support 100 and the second support 200 are placed in their respective positions, and then the surgical suture is alternately threaded through the first support 100 and the second support 200 to connect them. Simultaneously, to ensure that the first connector 300 has radial and axial displacement, a predetermined distance is maintained between the first support 100 and the second support 200 sutured by the surgical suture.

[0083] In one embodiment, the medical stent further includes a second connector for connecting the first support 100 and the first connector 300, and for connecting the second support 200 and the first connector 300. This embodiment adds a dedicated second connector and uses at least one of surgical sutures or clamps to achieve a stable connection between the support and the first connector 300, enabling rapid assembly and fixation of all structural components. The assembly method is simple and convenient, adapting to the needs of rapid intraoperative operations. This connection type is reliable and highly malleable, allowing for flexible adjustment of the connection position and tightness according to the patient's tissue anatomy, ensuring a tight connection between the first support 100, the first connector 300, and the second support 200, preventing component loosening or misalignment. Simultaneously, the flexible or controllable limiting connection characteristics of the second connector can synergistically adapt to the overall deformation adjustment capability of the stent, buffering local stress, reducing the pressure and stimulation of the anastomosing tissue by the rigid connection, improving the overall structural stability and intraoperative implantation compatibility of the medical stent, and ensuring postoperative tissue healing.

[0084] The second connector connects the first support 100 and the first tissue portion. This second connector achieves a dedicated connection and fixation between the first support 100 and the first tissue portion, precisely positioning the implantation location of the first support 100. This effectively limits slippage, displacement, or loosening of the support portion, ensuring the first support 100 stably and securely covers the outside of the first tissue portion, avoiding support failure and poor tissue adhesion caused by support structure displacement. Simultaneously, the tightness of the connection can be flexibly adjusted according to the actual shape and tension of the first tissue portion, adapting to individualized tissue anatomy, improving the coverage and fixation effect of the first support 100 on the first tissue portion, maintaining structural stability in the anastomosis area, providing a reliable structural basis for subsequent tissue alignment and healing, and further enhancing the overall implantation stability and repair effect of the stent.

[0085] The second connector connects the second support 200 and the second tissue portion. This connector achieves a precise and fixed connection between the second support 200 and the second tissue portion, effectively constraining the position of the second support 200 and preventing slippage, displacement, or loosening during intraoperative adjustments and postoperative tissue micro-movements. This ensures the second support 200 tightly adheres to and covers the outer side of the second tissue portion, stably maintaining its support and shaping effect. This connection structure adapts to the anatomical shape and tissue tension of the second tissue portion, allowing for flexible adjustment of the fixation tightness. It avoids problems such as support misalignment and inadequate fit, ensuring the stability of the anastomotic end structure of the second tissue portion. Working in conjunction with the fixation structure of the first support 100, it achieves precise alignment of the two tissue ends, providing a reliable structural guarantee for the smooth healing of the urinary tract anastomosis tissue and reducing postoperative complications.

[0086] The second connector includes at least one of a surgical suture and a clamp. It can flexibly adapt to the fixation connection requirements between the second support 200 and the second tissue portion, and between the first support 100 and the first tissue portion. During the operation, the fixation method can be flexibly selected according to the patient's local tissue thickness, tension, and operating space, resulting in greater adaptability and operability. The surgical suture can achieve flexible and close-fitting fixation, conforming to the tissue contour and avoiding rigid pressure. The clamp can achieve quick positioning and locking, providing secure fixation and preventing loosening. Both fixation methods ensure a stable connection between the support portion and the corresponding tissue portion, effectively preventing postoperative displacement and slippage. Simultaneously, they do not limit the stent's own adaptive deformation capability, and can work with the overall stent structure to buffer tissue micro-stress, stabilize the anastomosis area structure, ensure tissue healing quality, and reduce postoperative risks such as urinary leakage and anastomotic misalignment.

[0087] In this embodiment, the application of the second connector includes at least one of them.

[0088] In one embodiment, the first support member 100 includes a constant diameter portion 110 and a variable diameter portion 120. One end of the constant diameter portion 110 is close to and connected to the first connector 300. The diameter of the constant diameter portion 110 is the same along the axial direction, that is, the diameter of the constant diameter portion 110 remains unchanged along the extending direction of the constant diameter portion 110. The variable diameter portion 120 is connected to the end of the constant diameter portion 110 facing away from the first connector 300, and the diameter of the variable diameter portion 120 gradually increases in the direction away from the constant diameter portion 110, so that the first support member 100 can conform to the tissue contour shape of the bladder end to improve the support effect.

[0089] Optionally, the second support 200 is a tubular structure with a constant diameter, thereby matching the urethral structure.

[0090] Optionally, the first support member 100 and the second support member 200 have similar structures to the first connector 300, all forming their respective structures through cross-connection of the first monofilament 310 and the second monofilament 320. Optionally, the intersection point 330 of the first support member 100 can also be a movable connection. Optionally, the intersection point 330 of the second support member 200 can also be a movable connection.

[0091] Optionally, at the intersection 330 of the first support member 100 and the intersection 330 of the second support member 200, the first monofilament 310 and the second monofilament 320 are fixedly connected.

[0092] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0093] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A medical stent, characterized in that, The medical stent, configured to assist in the remodeling of the connection between the first and second tissue portions, comprises: A first support member (100) is configured to be fitted onto the first tissue portion and to support the first tissue portion, wherein the first support member (100) is selected according to the size of the first tissue portion; The second support member (200) is configured to be fitted onto the second tissue portion and to support the second tissue portion. The first support member (100) and the second support member (200) are separate structures. The first connector (300) is connected to the first support (100) and the second support (200).

2. The medical stent according to claim 1, characterized in that, The first connector (300) is a deformable structure.

3. The medical stent according to claim 2, characterized in that, The first connector (300) has a variable radial dimension; And / or, the first connector (300) has a variable axial dimension.

4. The medical stent according to claim 3, characterized in that, The first connector (300) includes: Multiple first monofilaments (310) are spaced apart, and at least a portion of the first monofilaments (310) extend along a first direction; Multiple second monofilaments (320) are spaced apart, and the second monofilaments (320) extend at least partially along a second direction; Multiple first monofilaments (310) and multiple second monofilaments (320) are interwoven to form a mesh; The first direction and the second direction are set at an angle, the angle being 30°-85°.

5. The medical stent according to claim 4, characterized in that, Both ends of each of the first monofilaments (310) are connected to the ends of the second monofilaments (320), and both ends of each of the second monofilaments (320) are connected to the ends of the first monofilaments (310); At the intersection (330) between the middle position of the first monofilament (310) and the middle position of the second monofilament (320), there are a plurality of said intersection (330) positions between the first monofilament (310) and the second monofilament (320), wherein the first monofilament (310) and the second monofilament (320) are movably connected at at least part of said intersection (330) positions.

6. The medical stent according to claim 5, characterized in that, The movable connection includes at least one of the following: rotatable connection, physical fit and surgical suture connection, and clamping.

7. The medical stent according to claim 3, characterized in that, The first connector (300) is a flexible wire, which is alternately threaded through the first support (100) and the second support (200) to connect the first support (100) and the second support (200).

8. The medical stent according to any one of claims 1-7, characterized in that, The medical stent also includes a second connector, which is used for at least one of the following: The second connector is used to connect the first support (100) and the first connector (300), and to connect the second support (200) and the first connector (300). The second connector is used to connect the first support (100) and the first tissue section; The second connector is used to connect the second support (200) and the second tissue section; The second connector includes at least one of surgical sutures and clamps.

9. The medical stent according to any one of claims 1-7, characterized in that, The axial dimension of the medical stent is 8mm-25mm.

10. The medical stent according to any one of claims 1-7, characterized in that, The first support member (100) includes: An equal diameter portion (110) is provided, one end of which is used to connect to the first connector (300), and the equal diameter portion (110) is identical along the axial direction; The variable diameter portion (120) is connected at one end to the end of the constant diameter portion (110) that is away from the first connector (300), and the diameter of the variable diameter portion (120) gradually increases in a direction away from the constant diameter portion (110).

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