Mesh anchoring device for laparoscopic pelvic floor suspension surgery

Abstract

The utility model belongs to the technical field of medical instruments, particularly relates to a mesh anchoring device for laparoscopic pelvic floor suspension surgery, and provides the following scheme aiming at the problems of high operation technical difficulty and long surgery time in the existing mesh anchoring process: the mesh anchoring device comprises a mesh, a suture component and an anchor component. The anchor assembly is provided with an anchoring rod and a conical tip, a rod body of the anchor assembly is provided with a self-growing barb capable of being triggered by the body temperature to flexibly expand outwards and a retractable anchoring tip, and non-penetrating type safe anchoring is achieved. The suture assembly comprises a single suture with a positioning bead and a tightening ball containing a temperature response water absorption condensate bead, a locking mechanism without knotting is formed by combining the suture assembly with an elastic locking clamping block arranged in a through hole in the top end of the anchoring rod, and the mesh tension can be accurately fixed by an operator by tensioning the suture. In addition, a liquid bag loaded with a liquid medicament and a flow guide channel can be integrated in the anchoring rod, so that local medicament slow release is realized. And the safety of anchoring the mesh in the pelvic floor suspension operation is realized.

Description

Technical Field

[0001] This utility model relates to a mesh anchoring device, specifically a mesh anchoring device for laparoscopic pelvic floor suspension surgery, belonging to the field of medical device technology. Background Technology

[0002] Pelvic floor dysfunction is a common disease affecting the quality of life of middle-aged and elderly women. Laparoscopic pelvic floor reconstruction surgery, especially sacral fixation, has become the "gold standard" procedure for treating moderate to severe pelvic organ prolapse due to its minimal invasiveness, rapid recovery, and long-lasting effects. The core of this surgery is placing an artificial mesh in the pelvic cavity, fixing one end to the vaginal apex and the other end to the anterior longitudinal ligament of the sacrum, thereby reconstructing the pelvic floor support structure. However, the success of the surgery and the control of complications highly depend on whether the mesh can be safely, firmly, and conveniently fixed to the tough tissues of the pelvic floor (such as the sacral ligament and obturator internus fascia). Currently, the method of mesh fixation remains a major challenge in clinical practice. Existing techniques mainly have the following drawbacks: First, traditional manual suturing requires surgeons to perform highly difficult intracavitary suturing and knotting within the confined space of a laparoscopy. This not only demands extremely high surgical skills and has a long learning curve but is also time-consuming. Furthermore, it is difficult to control the suture tension evenly, easily leading to mesh shrinkage or insecure fixation. Secondly, while mechanical fixation with metal or absorbable nails is relatively quick to operate in order to avoid suturing difficulties, its penetrating fixation principle carries an inherent risk of damaging the rich nerves and blood vessels of the pelvic wall (such as the obturator nerve and iliac vessels), which may lead to serious complications such as postoperative chronic pain and bleeding. In addition, metal nails can also interfere with postoperative imaging examinations.

[0003] In existing technologies, such as the Ψ1 type pelvic floor repair mesh disclosed in CN214017981U, specific anterior, posterior, and upper arms are designed on the mesh body. By wrapping around the uterus and fixing it to the anterior longitudinal ligament of the sacrum, it aims to achieve a more secure anatomical repositioning. Another example is an auxiliary component for repairing female anterior pelvic organ prolapse disclosed in CN207532430U. This component forms a pocket-like structure by setting auxiliary fixation pieces connected to the implanted mesh, aiming to provide uniform force to the suspended mesh and prevent local dislodgement. However, these structures focus on the morphological and mechanical distribution design of the mesh and do not fundamentally solve the technical bottleneck of the aforementioned laparoscopic fixation operation itself, namely, how to achieve an anchoring mechanism that is easy to operate, reliable in fixation, and extremely safe. Whether using complex mesh arms or auxiliary fixation plates, final fixation may still rely on traditional suturing or staples, failing to avoid the difficulty and risks of deep suturing and knotting, and not eliminating the potential threat to nerves and blood vessels from penetrating fixation. Suturing and fixation operations are extremely difficult; endoscopic knotting within the confined space of a laparoscopy is a recognized highly challenging technique, demanding high skill from the surgeon, with a long learning curve. Each suture point requires precise puncture and knotting, significantly prolonging surgery and anesthesia time. The tightness of manual knotting is difficult to control precisely, potentially leading to mesh shrinkage or insecure fixation. Using metal staples for fixation, on the other hand, carries the risk of nerve and blood vessel injury due to the dense distribution of important structures such as the iliac vessels and obturator nerve on the pelvic sidewall. This could lead to serious complications such as postoperative chronic pain and bleeding, and the hard metal staples may cause long-term irritation to surrounding tissues, causing postoperative pain or discomfort in the patient. Utility Model Content

[0004] This invention provides a mesh anchoring device for laparoscopic pelvic floor suspension surgery to address the problems of high operational difficulty and long operation time in existing mesh anchoring techniques.

[0005] The present invention achieves the above objectives through the following technical solution: a mesh anchoring device for laparoscopic pelvic floor suspension surgery, comprising a mesh, the edge of which is connected to a plurality of matching suture assemblies and anchor assemblies, one end of the suture assembly being fixedly connected to the anchor assembly, the other end of the suture assembly being movably passed through the anchor assembly, and the stretching length of the end of the suture assembly movably passed through the anchor assembly being adjustable;

[0006] The suture assembly includes two individual sutures. Several tightening balls are fitted on one end of the two individual sutures that are fixedly connected to the anchor assembly. The individual sutures located inside the tightening balls can change from being taut to being tightly attached to the inner wall of the tightening balls. Several equidistant positioning beads are fixedly connected to the other end of the two individual sutures. Any positioning bead is placed on the anchor assembly.

[0007] The anchor assembly includes an anchor rod and a tapered tip at its bottom. The top of the anchor rod has a through hole with multiple locking blocks inside. The anchor rod is connected to multiple self-growing barbs that can gradually expand outwards. The tapered tip is connected to multiple anchoring tips that can elastically retract inwards.

[0008] As a further improvement of this utility model: several holes are provided at the edge of the mesh, and a connecting ball is movably sleeved on the thread of two individual sewing threads. The body of the connecting ball is fixedly connected to a mesh hook, and the mesh hook is hooked onto the holes provided at the edge of the mesh.

[0009] As a further improvement of this utility model: the tightening ball is a hollow sphere with several through holes in its body. A water-absorbing bead is fixedly connected inside the hollow cavity of the tightening ball. The water-absorbing bead is flat in its initial state. Two single-piece sewing threads are threaded through the hollow cavity of the tightening ball and are located on the upper and lower sides of the water-absorbing bead, respectively.

[0010] As a further improvement of this utility model, the top of the anchor rod is arc-shaped.

[0011] As a further embodiment of this utility model: the locking blocks provided in the perforation are distributed symmetrically in an upper and lower shape, and the outer ends of the symmetrically arranged locking blocks are elastically connected to the inner wall of the perforation. Multiple locking block bending grooves are opened on one side of the locking blocks. When the thread of the sewing assembly is inserted into the perforation, the locking blocks bend towards the side with the locking block bending grooves. A limiting block is connected to the other side of the locking blocks, and the limiting block is movably attached to the inner wall of the perforation.

[0012] As a further improvement of this utility model: the anchor rod has a barb placement cavity, the bottom end of the self-growing barb is fixedly connected to the barb placement cavity, the tip of the self-growing barb is initially located in the barb placement cavity, a number of water-absorbing gel pads are embedded in the side of the self-growing barb near the inner side of the barb placement cavity, and a number of barb bending grooves are formed in the side of the self-growing barb near the outer side of the barb placement cavity. It should be noted that the water-absorbing gel pads are also temperature-responsive bioabsorbable materials that can swell after absorbing water or triggering body temperature.

[0013] As a further embodiment of this utility model: a pointed tip mounting groove is provided on the conical surface of the conical tip, and the bottom end of the anchoring tip is fixedly connected to the groove of the pointed tip mounting groove. In the initial state, the pointed end of the anchoring tip is located outside the pointed tip mounting groove. A hydrogel elastic sheet is connected to the bottom surface of the pointed tip mounting groove, and the hydrogel elastic sheet is located directly below the anchoring tip. When the hydrogel elastic sheet bulges upward and pushes the anchoring tip, the anchoring tip is hidden in the pointed tip mounting groove.

[0014] As a further improvement of this utility model: the anchor rod has a liquid guiding channel and multiple diversion channels inside the rod. The multiple diversion channels are all connected to the bottom end of the liquid guiding channel. The other end of the diversion channel is located directly below the hydrogel elastic sheet. The rod body of the anchor rod is fixedly connected to a liquid bladder. The liquid bladder is connected to the upper end of the liquid guiding channel. The liquid bladder, diversion channels and liquid guiding channels are filled with liquid agents.

[0015] As a further improvement of this utility model: the liquid bladder is ring-shaped, and part of the liquid bladder body is concave and fixedly connected to the rod body of the anchor rod, and the connection position of the liquid bladder is the clamping operation part of the anchor rod.

[0016] The beneficial effects of this utility model are:

[0017] 1. This utility model is equipped with a mesh, a suture assembly, and an anchor assembly. One end of the suture assembly is fixedly connected to the anchor assembly, and the other end of the suture assembly is movably passed through the anchor assembly. The length of the suture assembly movably passed through the anchor assembly is adjustable. After the surgeon completes the implantation of the anchor assembly under the laparoscopic view, there is no need to perform difficult intracavitary knotting operations. The mesh can be fixed simply by tightening the suture assembly, which greatly reduces the technical difficulty and shortens the operation time. By setting up several matching suture assemblies and anchor assemblies, multi-point and balanced fixation of the mesh edge can be achieved, effectively avoiding tissue cutting or mesh shrinkage caused by single-point stress concentration, and ensuring that the mesh is flat and attached to the pelvic floor tissue.

[0018] 2. The suture assembly of this utility model includes two individual sutures. One end of each individual suture is fixedly connected to the anchor assembly and has several tightening balls fitted on it. The individual sutures inside the tightening balls can change from a taut state to a state that is tightly attached to the inner wall of the tightening balls. The other end of each individual suture is fixedly connected to several equidistantly distributed positioning beads. Any positioning bead can be placed on the anchor assembly. The two individual sutures can provide higher fixing tension. The equidistant distribution of the positioning beads allows the surgeon to select positioning beads at different positions for fixing, thereby achieving precise adjustment of the mesh fixing tension. This avoids the problem of uneven tension caused by differences in feel in traditional knotting. The tightening balls can change the sutures inside from a taut state to a state that is tightly attached to the inner wall of the ball, so that the tension can be automatically maintained after the individual sutures are tightened, without the need for additional knotting.

[0019] 3. The anchoring device assembly of this utility model includes an anchoring rod and a conical tip at its bottom. The top of the anchoring rod has a perforation, and multiple locking blocks are installed inside the perforation. The rod body is connected to multiple self-growing barbs that can gradually expand outward. The conical surface of the conical tip is connected to multiple anchoring tips that can elastically retract inward. The conical tip facilitates puncture and implantation, reducing tissue damage. The perforation and locking blocks together constitute a locking mechanism that cooperates with the positioning bead to achieve the snap-fit ​​fixation of the suture assembly. The self-growing barbs maintain a low profile in the early stage of implantation to smoothly enter the tissue. Subsequently, under the trigger of body fluid or body temperature, they expand and unfold, thereby achieving a flexible and gradually increasing gripping force inside the tissue. This avoids continuous cutting damage to the tissue by rigid barbs, reducing postoperative pain and erosion risks. The anchoring tips further ensure that the tips can retract when the anchoring rod encounters resistance during implantation, reducing the risk of abrasion to nerves and blood vessels. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the connection structure between the suture assembly and the anchor assembly of this utility model;

[0022] Figure 3 This utility model Figure 2 Schematic diagram of the structure at point A in the middle;

[0023] Figure 4 This is a schematic diagram showing the morphological changes of the single-piece suture inside the tightening ball of this utility model;

[0024] Figure 5 This is a schematic cross-sectional view of the anchor assembly of this utility model;

[0025] Figure 6 This is a schematic cross-sectional view of the positioning bead passing through the perforation in this utility model.

[0026] Figure 7 This utility model Figure 5 A schematic diagram of the structural changes in the shape of the anchoring tip at point B;

[0027] Figure 8 This utility model Figure 5 A schematic diagram of the morphological changes of the self-growing barbs at point C.

[0028] In the diagram: 1. Mesh; 2. Suture assembly; 21. Individual suture; 22. Positioning bead; 23. Tightening ball; 24. Connecting ball; 25. Mesh hook; 26. Through hole; 27. Absorbent beads; 3. Anchor assembly; 31. Anchor rod; 32. Liquid bladder; 33. Conical tip; 34. Anchor tip; 35. Self-growing barb; 36. Liquid channel; 37. Diversion channel; 38. Perforation; 39. Locking block; 310. Block bending groove; 311. Limiting block; 312. Barb placement cavity; 313. Absorbent gel pad; 314. Barb bending groove; 315. Tip placement groove; 316. Hydrogel elastic sheet. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Example 1

[0031] like Figures 1 to 8 As shown, a mesh anchoring device for laparoscopic pelvic floor suspension surgery includes a mesh 1. Several matching suture components 2 and anchoring components 3 are connected to the edge of the mesh 1. One end of the suture component 2 is fixedly connected to the anchoring component 3, and the other end of the suture component 2 is movably passed through the anchoring component 3. The length of the suture component 2 movably passed through the anchoring component 3 is adjustable. After the surgeon completes the implantation of the anchoring component 3 under the laparoscopic view, there is no need to perform difficult intracavitary knotting operations. The mesh 1 can be fixed simply by tightening the suture component 2, which greatly reduces the technical difficulty and shortens the operation time. By setting several matching suture components 2 and anchoring components 3, multi-point and balanced fixation of the edge of the mesh 1 can be achieved, effectively avoiding tissue cutting or mesh shrinkage caused by single-point stress concentration, and ensuring that the mesh 1 is flat and attached to the pelvic floor tissue.

[0032] The suture assembly 2 includes two individual sutures 21. One end of each individual suture 21 is fixedly connected to the anchor assembly 3 and has several tightening balls 23 fitted on it. The individual sutures 21 inside the tightening balls 23 can change from being taut to being tightly attached to the inner wall of the tightening balls 23. The other end of each individual suture 21 is fixedly connected to several equidistantly distributed positioning beads 22. Any positioning bead 22 can be placed on the anchor assembly 3. The two individual sutures 21 can provide higher fixing tension. The equidistant distribution of the positioning beads 22 allows the surgeon to select different positions of the positioning beads 22 for fixing, thereby achieving precise adjustment of the fixing tension of the mesh 1. This avoids the problem of uneven tension caused by differences in feel in traditional knotting. The tightening balls 23 can change the sutures inside them from being taut to being tightly attached to the inner wall of the ball, so that the tension can be automatically maintained after the individual sutures 21 are tightened, without the need for additional knotting.

[0033] The anchoring assembly 3 includes an anchoring rod 31 and a tapered tip 33 at its bottom. The top of the anchoring rod 31 has a perforation 38, within which multiple locking blocks 39 are installed. The rod body of the anchoring rod 31 is connected to multiple self-growing barbs 35 that can gradually expand outwards. The tapered surface of the tapered tip 33 is connected to multiple inwardly retractable anchoring tips 34. The tapered tip 33 facilitates puncture and implantation, reducing tissue damage. The perforation 38 and the locking blocks 39 together constitute a locking mechanism that cooperates with the positioning bead 22, achieving the snap-fit ​​fixation of the suture assembly 2. The self-growing barbs 35 remain in place during the initial implantation stage. The low profile allows for smooth entry into the tissue, and then, triggered by body fluids or body temperature, it undergoes expansion and unfolding deformations, thereby achieving a flexible and gradually increasing gripping force within the tissue. This avoids the continuous cutting damage to the tissue caused by rigid barbs, reducing postoperative pain and the risk of erosion. The anchor tip 34 further ensures that the anchor rod 31 can retract when it encounters resistance during implantation, reducing the risk of abrasion to nerves and blood vessels. It should be noted that the mesh 1, the single suture 21, and the anchor assembly 3 are all made of biodegradable materials, ensuring that the device can be absorbed by the human body after placement, eliminating the need for secondary removal after surgery.

[0034] Example 2

[0035] Improvements based on Example 1:

[0036] like Figures 1 to 4 As shown, several holes are provided at the edge of the mesh 1. Connecting balls 24 are movably sleeved on the bodies of two individual sutures 21. The bodies of the connecting balls 24 are fixedly connected to mesh hooks 25, and the mesh hooks 25 are hooked onto the holes provided at the edge of the mesh 1. The hooking connection between the mesh hooks 25 and the holes is simple to operate, easy to complete under the operation of laparoscopic instruments, and the connection is reliable, avoiding the problem of mesh wire breakage or slippage that may occur if the sutures pass directly through the mesh 1.

[0037] Furthermore, the tightening ball 23 is a hollow sphere with several through holes 26. A water-absorbing bead 27 is fixedly connected inside the hollow cavity of the tightening ball 23. The water-absorbing bead 27 is initially flat. Two individual sutures 21 are threaded through the hollow cavity of the tightening ball 23, located above and below the water-absorbing bead 27. In its initial dry state, the water-absorbing bead 27 is flat. When implanted, the water-absorbing bead 27 swells upon contact with tissue fluid or triggered by body temperature, significantly increasing its volume. This allows it to support the two individual sutures 21, shortening their overall length. The surgeon only needs to tighten the individual sutures 21 to the appropriate tension, and the internal environment will automatically lock them in place, avoiding the problem of inconsistent tightness caused by manual knotting. It should be noted that the water-absorbing beads 27 are temperature-responsive bioabsorbable materials that can swell after absorbing water or triggering body temperature. Temperature-responsive bioabsorbable materials include, but are not limited to, the low-temperature melt modified PCL mentioned in the synthesis method and application of a low-temperature melt drug sustained-release medical polymer material disclosed in CN110698656A, the PLA thermosensitive hydrogel mentioned in the temperature-sensitive multi-block polymer and its preparation method and application disclosed in CN105622903B, or the PLA-PNIPAM thermosensitive block copolymer mentioned in the biodegradable thermosensitive block copolymer and its preparation method disclosed in CN102977294A.

[0038] like Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the top of the anchor rod 31 is arc-shaped. In laparoscopic pelvic floor surgery, after the anchor rod 31 is completely implanted into the tissue, its top will become the interface that is in long-term contact with the soft tissue in the body. Designing the top as a smooth arc-shaped surface can make smooth contact with the surrounding tissue and promote the formation of a smooth wrapping of soft tissue on the top surface of the anchor rod 31.

[0039] Furthermore, the locking blocks 39 arranged within the perforation 38 are symmetrically distributed vertically. The outer ends of the symmetrically arranged locking blocks 39 are elastically connected to the inner wall of the perforation 38. Multiple locking block bending grooves 310 are provided on one side of the locking blocks 39. When the thread of the sewing assembly 2 is threaded through the perforation 38, the locking blocks 39 bend towards the side with the locking block bending grooves 310. The other side of the locking blocks 39 is connected to a limiting block 311. The limiting block 311 is movably attached to the inner wall of the perforation 38. The symmetrically distributed locking blocks 39 can evenly clamp the positioning beads 22 from two directions, ensuring a balanced locking force. To prevent tilting or accidental dislodgement caused by unilateral force, the locking block 39 is elastically connected to the inner wall of the perforation 38, allowing it a certain amount of room for movement. When the thread with the positioning bead 22 is inserted, the positioning bead 22 can squeeze and expand the locking block 39, causing it to bend elastically. The bent groove 310 of the block facilitates deformation, allowing the positioning bead 22 to pass smoothly. Once the positioning bead 22 has passed, the locking block 39 rebounds under the action of elastic restoring force, and the limiting block 311 on its other side can abut against the inner wall of the perforation 38 to prevent the locking block 39 from bending in the opposite direction, ensuring that the positioning bead 22 is securely limited and fixed.

[0040] Furthermore, the anchor rod 31 has a barb placement cavity 312 on its shaft. The bottom end of the self-growing barb 35 is fixedly connected to the barb placement cavity 312. The tip of the self-growing barb 35 is initially located in the barb placement cavity 312. Several absorbent gel pads 313 are embedded in the side of the self-growing barb 35 near the inner side of the barb placement cavity 312. Several barb bending grooves 314 are formed on the side of the self-growing barb 35 near the outer side of the barb placement cavity 312. It should be noted that the absorbent gel pads 313 are also temperature-responsive bioabsorbable materials that can swell after absorbing water or triggering body temperature. Before and during implantation, the tip of the self-growing barb 35 is retracted into the barb placement cavity 312, making the overall outline of the anchor rod 31 smooth, similar to a smooth rod, reducing the scraping and tearing of the tissue channel by the self-growing barb 35 during implantation, and minimizing tissue damage. After implantation, the absorbent gel pad 313 located inside the self-growing barb 35 absorbs tissue fluid and swells, generating a continuous outward pushing force. Under the combined action of the pushing force and the barb bending groove 314 opened by the self-growing barb 35, the self-growing barb 35 is more likely to bend at a specific point. The tip of the self-growing barb 35 flexibly flips outward and unfolds from the barb placement cavity 312, avoiding tissue cutting caused by the instantaneous opening of the rigid barb.

[0041] Furthermore, the conical tip 33 has a pointed tip mounting groove 315 on its conical surface. The bottom end of the anchoring tip 34 is fixedly connected to the groove of the pointed tip mounting groove 315. In the initial state, the pointed end of the anchoring tip 34 is located outside the pointed tip mounting groove 315. A hydrogel elastic sheet 316 is connected to the bottom surface of the pointed tip mounting groove 315, and the hydrogel elastic sheet 316 is located directly below the anchoring tip 34. When the hydrogel elastic sheet 316 protrudes upward and pushes the anchoring tip 34, the anchoring tip 34 is hidden inside the pointed tip mounting groove 315. It should be noted that the hydrogel elastic sheet 316 is a thermosensitive hydrogel membrane. Thermosensitive hydrogel membranes are not dissolved by the drug solution and can slowly degrade in the body. Therefore, when the hydrogel elastic sheet 316 bulges upward to push the anchor tip 34, the anchor tip 34 is hidden in the tip placement groove 315. During the implantation stage of the anchor rod 31, the hydrogel elastic sheet 316 bulges upward to push the anchor tip 34. At this time, the tip of the anchor tip 34 is hidden in the tip placement groove 315, making the implantation process easier and smoother. Once the anchor rod 31 enters the tissue, the hydrogel elastic sheet 316 slowly dissolves under the action of body temperature. As it dissolves, the anchor tip 34, which was originally pushed upward and contracted in the tip placement groove 315, pops outward under its own elasticity, restoring its protruding state, playing an auxiliary anchoring role. It works synergistically with the self-growing barbs 35 to enhance the stability of the anchor rod 31 in the tissue.

[0042] Furthermore, the anchor rod 31 has a liquid guiding channel 36 and multiple diversion channels 37 inside. All diversion channels 37 are connected to the bottom end of the liquid guiding channel 36. The other end of each diversion channel 37 is located directly below the hydrogel elastic sheet 316. A liquid bladder 32 is fixedly connected to the body of the anchor rod 31. The liquid bladder 32 is connected to the upper end of the liquid guiding channel 36. The liquid bladder 32, diversion channels 37, and liquid guiding channel 36 are filled with liquid agents. It should be noted that a gap is left between the anchor tip 34 and the bottom surface of the tip mounting groove 315. The liquid agents originate from the liquid bladder 32, pass through the liquid guiding channel 36 and diversion channels 37. Finally, the medication is delivered to the hydrogel elastic sheet 316 region, causing the hydrogel elastic sheet 316 to be pushed upwards to form a protrusion. This facilitates the placement of the anchor tip 34 into the tip placement groove 315 during the anchor rod 31 implantation stage. Simultaneously, the liquid medication is automatically released after dissolving in the hydrogel elastic sheet 316, achieving targeted drug delivery. Because there is a gap between the anchor tip 34 and the bottom surface of the tip placement groove 315, when the anchor tip 34 is in an outward protruding state, it will not affect the seepage of the liquid medication from the diversion channel 37. For example, antibiotics can be loaded to prevent implant infection, or anti-inflammatory drugs can be loaded to reduce local inflammatory reactions. This local targeted drug delivery method can form a high drug concentration at the lesion site while avoiding the side effects of systemic drug delivery.

[0043] Furthermore, the liquid bladder 32 is ring-shaped, and part of the bladder body is concave and fixedly connected to the rod body of the anchor rod 31. The connection position of the liquid bladder 32 is the clamping operation position of the anchor rod 31. During the implantation of the anchor rod 31, the directional implantation of the anchor rod 31 can be easily controlled by clamping it at the liquid bladder 32. At the same time, the liquid agent in the liquid bladder 32 can be delivered to the hydrogel elastic sheet 316 area to lift the hydrogel elastic sheet 316 upward.

[0044] Working principle: The operator first connects several sets of suture components 2 and anchor components 3 to the mesh 1 according to the size of the mesh 1 and the predetermined fixing points. Through the connecting ball 24 and its mesh hook 25 that are movably sleeved on the individual suture 21, the mesh hook 25 is easily and reliably hooked onto the hole on the edge of the mesh 1 to complete the modular assembly.

[0045] During the implantation stage, the surgeon uses instruments to clamp the annular liquid bladder 32 at a specific location on the anchor rod 31 to control the direction and deliver the anchor assembly 3 into the abdominal cavity. The anchor rod 31 is implanted through the conical tip 33. The hydrogel elastic sheet 316 below is temporarily retracted into the tip placement groove 315 because it is lifted by the liquid agent delivered by the liquid bladder 32 through the liquid channel 36 and the diversion channel 37. This ensures a smooth implantation process and reduces the risk of tissue damage and nerve and blood vessel abrasion. At the same time, the tip of the self-growing barb 35 is retracted into the barb placement cavity 312, making the overall outline of the anchor rod 31 smooth and facilitating minimally invasive implantation.

[0046] When the anchor assembly 3 is pushed to the predetermined depth of the target ligament or fascia tissue, the hydrogel elastic sheet 316 under the anchor tip 34 gradually dissolves, and the anchor tip 34, which loses its support, pops outward under its own elasticity, providing initial auxiliary anchoring force; the hydrogel pad 313 inside the barb placement cavity 312 absorbs tissue fluid and swells, generating a continuous outward pushing force. Combined with the design of the barb bending groove 314, it drives the tip of the self-grown barb 35 to slowly and flexibly flip and unfold outward from the cavity, forming a progressive flexible gripping force, which can avoid tissue cutting and match the healing process;

[0047] While completing the mechanical anchoring, the dissolution of the hydrogel elastic sheet 316 also opens the release window, allowing the liquid agents (such as anti-inflammatory or antibiotic agents) stored in the liquid sac 32 to be continuously released to the surrounding tissues through the liquid channel 36 and the shunt channel 37, achieving local targeted treatment. Furthermore, since the mesh 1, the single suture 21, and the anchor assembly 3 are all made of biodegradable materials, it is ensured that the device can be absorbed by the human body after placement, without the need for secondary removal after surgery.

[0048] The surgeon tightens the two individual sutures 21 extending from the perforation 38 at the top of the anchor rod 31, causing the mesh 1 to adhere to the surface of the pelvic floor tissue. When the positioning bead 22 on the individual suture 21 passes through the perforation 38, it squeezes and expands the locking block 39, which is elastically bent through the locking block bending groove 310. Once the positioning bead 22 passes through, the locking block 39 rebounds under elastic action, and the limiting block 311 on its back side ensures a stable one-way lock on the positioning bead 22. At the same time, the water-absorbing beads 27 inside the tightening ball 23 on the individual suture 21 swell rapidly under the trigger of body temperature or tissue fluid, pushing the individual sutures 21 passing through its upper and lower sides to both sides and pressing them against the inner wall of the tightening ball 23, further locking the individual sutures 21.

[0049] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0050] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A mesh anchoring device for laparoscopic pelvic floor suspension surgery, comprising a mesh (1), characterized in that: The edge of the mesh (1) is connected with several matching sewing assemblies (2) and anchor assemblies (3). One end of the sewing assembly (2) is fixedly connected to the anchor assembly (3), and the other end of the sewing assembly (2) is movably threaded through the anchor assembly (3). The stretching length of the end of the sewing assembly (2) that is movably threaded through the anchor assembly (3) is adjustable. The suture assembly (2) includes two individual sutures (21). One end of the two individual sutures (21) is fixedly connected to the anchor assembly (3) and is fitted with several tightening balls (23). The individual sutures (21) located inside the tightening balls (23) can change from being taut to being tightly attached to the inner wall of the tightening balls (23). The other end of the two individual sutures (21) is fixedly connected with several equidistant positioning beads (22). Any one of the positioning beads (22) is placed on the anchor assembly (3). The anchor assembly (3) includes an anchor rod (31) and a tapered tip (33) at its bottom end. The top of the anchor rod (31) has a through hole (38) and a plurality of locking blocks (39) are provided in the through hole (38). The rod of the anchor rod (31) is connected to a plurality of self-growing barbs (35) that can gradually expand outward. The tapered tip (33) is connected to a plurality of anchoring tips (34) that can elastically retract inward.

2. The mesh anchoring device for laparoscopic pelvic floor suspension surgery according to claim 1, characterized in that: The edge of the mesh (1) has several holes. A connecting ball (24) is movably sleeved on the body of the two individual sewing threads (21). The body of the connecting ball (24) is fixedly connected to a net hook (25), and the net hook (25) is hooked on the holes opened at the edge of the mesh (1).

3. The mesh anchoring device for laparoscopic pelvic floor suspension surgery according to claim 1, characterized in that: The tightening ball (23) is a hollow sphere. The body of the tightening ball (23) has several through holes (26). A water-absorbing bead (27) is fixedly connected inside the hollow cavity of the tightening ball (23). The water-absorbing bead (27) is flat in the initial state. Two single sewing threads (21) are threaded through the hollow cavity of the tightening ball (23) and are located on the upper and lower sides of the water-absorbing bead (27).

4. The mesh anchoring device for laparoscopic pelvic floor suspension surgery according to claim 1, characterized in that: The top of the anchor rod (31) is arc-shaped.

5. The mesh anchoring device for laparoscopic pelvic floor suspension surgery according to claim 1, characterized in that: The locking blocks (39) provided in the perforation (38) are distributed symmetrically in the upper and lower parts. The outer ends of the locking blocks (39) arranged symmetrically are elastically connected to the inner wall of the perforation (38). Multiple locking block bending grooves (310) are opened on one side of the locking blocks (39). When the thread of the sewing assembly (2) is inserted into the perforation (38), the locking blocks (39) bend towards the side with the locking block bending grooves (310). The other side of the locking blocks (39) is connected to a limiting block (311). The limiting block (311) is movably attached to the inner wall of the perforation (38).

6. The mesh anchoring device for laparoscopic pelvic floor suspension surgery according to claim 1, characterized in that: The anchor rod (31) has a barb placement cavity (312) on its shaft. The bottom end of the self-growing barb (35) is fixedly connected to the barb placement cavity (312). The tip of the self-growing barb (35) is initially located in the barb placement cavity (312). Several absorbent gel pads (313) are embedded in the side of the self-growing barb (35) near the inside of the barb placement cavity (312). Several barb bending grooves (314) are opened on the side of the self-growing barb (35) near the outside of the barb placement cavity (312). It should be noted that the absorbent gel pads (313) are also temperature-responsive bioabsorbable materials that can swell after absorbing water or triggering body temperature.

7. The mesh anchoring device for laparoscopic pelvic floor suspension surgery according to claim 1, characterized in that: The conical tip (33) has a pointed tip mounting groove (315) on its conical surface. The bottom end of the anchoring tip (34) is fixedly connected to the groove of the pointed tip mounting groove (315). The pointed end of the anchoring tip (34) is located outside the pointed tip mounting groove (315) in the initial state. A hydrogel elastic sheet (316) is connected to the bottom surface of the pointed tip mounting groove (315), and the hydrogel elastic sheet (316) is located directly below the anchoring tip (34). When the hydrogel elastic sheet (316) bulges upward and pushes the anchoring tip (34), the anchoring tip (34) is hidden in the pointed tip mounting groove (315).

8. The mesh anchoring device for laparoscopic pelvic floor suspension surgery according to claim 7, characterized in that: The anchor rod (31) has a liquid guiding channel (36) and multiple diversion channels (37) inside. The multiple diversion channels (37) are all connected to the bottom end of the liquid guiding channel (36). The other end of the diversion channel (37) is located directly below the hydrogel elastic sheet (316). The anchor rod (31) is fixedly connected to a liquid bladder (32). The liquid bladder (32) is connected to the upper end of the liquid guiding channel (36). The liquid bladder (32), the diversion channel (37) and the liquid guiding channel (36) are filled with liquid medicine.

9. The mesh anchoring device for laparoscopic pelvic floor suspension surgery according to claim 8, characterized in that: The liquid bladder (32) is ring-shaped, and part of the body of the liquid bladder (32) is concave and fixedly connected to the rod body of the anchor rod (31). The connection position of the liquid bladder (32) is the clamping operation part of the anchor rod (31).

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