Micro-needle type meniscus suturing device
By designing a microneedle meniscus suture device, using degradable metal anchors and biodegradable sutures, the minimally invasiveness and damage to joint tissue in traditional suture technology are solved, and a more efficient and safer meniscus repair effect is achieved.
Patent Information
- Application Number
- CN202421169852.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-05-27
AI Technical Summary
Traditional meniscus suturing techniques have minimally invasive deficiency, repeated damage to medial soft tissues, and additional damage to meniscus and joint capsules, resulting in prolonged postoperative pain and recovery time.
A microneedle-type meniscus suture device is designed, using a degradable metal anchor as a needle and an anchor. Through a precision-designed push device, damage to the meniscus and joint capsules is reduced, and biodegradable sutures are used to improve biocompatibility.
It significantly reduces the damage caused by the surgery to the patient, reduces postoperative pain and recovery time, speeds up the patient's recovery process, and improves the minimally invasiveness, biocompatibility and mechanical properties of the device.
Smart Images
Figure CN222870558U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of medical equipment and relates to a micro-needle meniscus suturing device. Background Art
[0002] In modern medical practice, arthroscopic surgery has become a widely used minimally invasive surgical technique, especially in the treatment of joint diseases such as the knee. Meniscus injury is one of the common problems in joint diseases, especially in sports and the elderly. Meniscus suturing is a surgical method commonly used to treat meniscus tears in the knee joint. This operation usually restores the integrity and function of the meniscus by suturing at the tear. However, there are some problems in the implementation of traditional meniscus suturing technology. Traditional meniscus repair technology often relies on larger surgical incisions and non-minimally invasive means, which may lead to prolonged recovery period and increased risk of complications for patients. Especially when using larger-sized push catheters and fixation lines, the surgical process often requires multiple punctures and operations, which not only increases the operation time, but also may cause multiple injuries to the medial soft tissue.
[0003] This multiple injury is particularly evident in the medial pain that patients often experience after surgery. A major cause of medial pain is the repeated damage to the medial soft tissue during the operation of the meniscus suturing device. In addition, the larger size of traditional devices causes additional damage to the meniscus and joint capsule, which may exacerbate postoperative pain and prolong recovery time.
[0004] Therefore, the traditional meniscus suturing technology has obvious deficiencies in minimally invasiveness, biocompatibility and mechanical properties, which prompted the development of the micro-needle meniscus suturing device of the present invention, aiming to provide a meniscus repair solution that is more minimally invasive, more biocompatible and has better mechanical properties. Utility Model Content
[0005] The purpose of the utility model is to provide a more efficient, accurate and patient-friendly micro-needle meniscus suturing device. The micro-needle meniscus suturing device of the utility model can perform surgical operations with smaller incisions, reduce postoperative pain, shorten recovery time, and significantly reduce the overall impact of surgery on the patient's body.
[0006] The purpose of the utility model can be achieved through the following technical solutions:
[0007] A micro-needle meniscus suturing device, comprising
[0008] Handle handle;
[0009] The ejector pin is arranged on the hand-held handle and is movable at the front end;
[0010] There are multiple loops, which are sequentially sleeved on the front end of the ejector pin along the moving direction, the front end of the loop is pointed, and sutures are arranged between the loops;
[0011] A one-way limiting structure is provided between the front end of the ejector pin and the inner wall of the loop, so that the front end of the ejector pin can push forward the support loop and withdraw from the loop.
[0012] When in use, use the thimble as an internal support and the tip of the frontmost loop as the needle to pass through the damaged soft tissue of the meniscus until the frontmost loop is completely extended out of the soft tissue. Then, retract the front end of the thimble to the outside of the loop and connect it to the next loop. Then repeat the operation so that the next loop is located outside the damaged soft tissue. Finally, pull the tail line of the suture to tighten the repair area.
[0013] The loop in the utility model serves as an anchor to provide mechanical support for tightening and repairing the damaged part, and also serves as a needle to penetrate the meniscus soft tissue, effectively avoiding the problem of excessive perforation area of the meniscus soft tissue caused by pushing the catheter to deliver the loop in conventional suturing devices, and effectively reducing additional damage to the meniscus and joint capsule.
[0014] Furthermore, a pull line is provided on the front side wall of the loop. By pulling the pull line on the front side wall of the loop, the loop can be deflected relative to the perforation, thereby better transforming to the anchoring state.
[0015] Furthermore, a blind hole for the ejector to pass through is provided on the loop located at the front end of the ejector, and through holes for the ejector to pass through are provided on the remaining loops.
[0016] Furthermore, the loop is provided with a through hole for the ejector pin to pass through.
[0017] Furthermore, the one-way limiting structure includes a one-way limiting member provided on the outer wall of the ejector pin and extending obliquely forward, and a one-way limiting matching member provided on the inner wall of the loop;
[0018] The one-way limiting member is an elastic member, so that the one-way limiting member can interfere with the one-way limiting matching member when moving forward following the ejector pin, and can withdraw following the ejector pin when moving backward.
[0019] Furthermore, the one-way limiting member is a rod-shaped member or a sheet-shaped member, and the one-way limiting matching member is a loop structure.
[0020] Furthermore, the rear side surface of the one-way limiting fitting is an inclined surface extending backward from inside to outside.
[0021] Furthermore, spaces or gaps are provided between adjacent loops.
[0022] Furthermore, the ejector pin is a telescopic sleeve.
[0023] Furthermore, the ejector pin is movably arranged on the hand-held handle.
[0024] Further, the loop is selected from one of biodegradable zinc and its alloy loops, biodegradable magnesium and its alloy loops, or biodegradable iron and its alloy loops;
[0025] and / or,
[0026] The suture is a biodegradable suture.
[0027] Compared with the prior art, the utility model has the following beneficial effects:
[0028] The utility model has a good solution effect on the additional damage to the meniscus and joint capsule, postoperative pain caused by repeated damage to the medial soft tissue, and the long-term residue and biocompatibility problems that may be caused by the use of non-degradable materials:
[0029] 1) Minimally invasive improvement: The utility model focuses on achieving a more minimally invasive surgical process. By utilizing the inherent characteristics of degradable metals, the degradable meniscus metal anchor is innovatively used as a needle. By using a smaller meniscus metal anchor and a precisely designed push device, the utility model significantly reduces damage to the meniscus and joint capsule, thereby alleviating postoperative pain and accelerating the patient's recovery process.
[0030] 2) Material optimization: The utility model uses biodegradable metal materials with better biocompatibility. These materials (such as zinc-based, magnesium-based, iron-based and their alloys) can gradually degrade in the body after completing their functions while providing the necessary mechanical support, reducing the risk of long-term residues and improving the safety and comfort of patients.
[0031] 3) Comprehensive performance improvement: Through the above improvements, the utility model comprehensively improves the performance of the meniscus suturing device, making it superior to the existing technology in terms of minimally invasiveness, biocompatibility, mechanical properties and patient comfort. By achieving these goals, the utility model provides a more advanced, safer and more effective solution for arthroscopic meniscus repair. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] Figure 1 It is a structural schematic diagram of a micro-needle meniscus suturing device in the embodiment;
[0033] Figure 2 This is a schematic diagram of the assembly of the ejector pin and the loop;
[0034] Description of the markings in the figure:
[0035] 1-handle handle, 2-thimble, 3-loop, 4-suture, 5-pull line, 6-one-way limit piece, 7-one-way limit matching piece. DETAILED DESCRIPTION
[0036] The following embodiments are implemented based on the above technical solution of the utility model, and provide detailed implementation methods and specific operation processes, but the protection scope of the utility model is not limited to the following embodiments.
[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0038] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.
[0039] Example:
[0040] like Figure 1 A micro-needle meniscus suturing device is shown, which is intended to provide a more sophisticated, safe and effective meniscus repair solution. This device is particularly suitable for meniscus injury repair in orthopedic surgery, and its design takes into account the needs of minimally invasive surgery and high-efficiency medical requirements.
[0041] Specifically, the device includes a hand-held handle 1, a thimble 2, and a plurality of loops 3. The thimble 2 is disposed on the hand-held handle 1, and the front end is movable; the plurality of loops 3 are sequentially sleeved on the front end of the thimble 2 along the moving direction, the front end of the loop 3 is pointed, and sutures 4 are disposed between the loops 3; two loops 3 are disposed in this embodiment, and a plurality of loops 3 may be disposed according to actual needs in other embodiments. The sutures 4 may be disposed on the side wall of the loop 3, or may be penetrated from an opening on the side wall into the central channel of the loop 3, and then pass out from another opening on the side wall.
[0042] A one-way limiting structure is provided between the front end of the ejector pin 2 and the inner wall of the loop 3 , so that the front end of the ejector pin 2 can push forward to support the loop 3 and retract from the loop 3 .
[0043] When in use, use the ejector pin 2 as an internal support and the tip of the frontmost loop 3 as a needle to penetrate the damaged soft tissue of the meniscus and into the joint capsule, so that the frontmost loop 3 is completely extended out of the soft tissue. Then, the front end of the ejector pin 2 is retracted to the outside of the loop 3 and connected to the next loop 3. Then, the operation is repeated so that the next loop 3 is located outside the damaged soft tissue. Finally, the tail line of the suture is pulled to achieve self-locking between the two loops 3, thereby tightening the repair part and firmly fixing the meniscus.
[0044] In this embodiment, the sutures and suture tails are used to tighten the damaged soft tissue by tightening the loops. The setting method is a conventional technical means, and the setting method of the sutures and suture tails in the meniscus suture device in the prior art can be adopted.
[0045] The loop 3 in this embodiment serves as an anchor to provide mechanical support for tightening and repairing the damaged part, and also serves as a needle to penetrate the meniscus soft tissue, effectively avoiding the problem of excessive perforation of the meniscus soft tissue caused by the needle catheter used to deliver the loop in conventional suturing devices, and effectively reducing additional damage to the meniscus and joint capsule.
[0046] Based on the above structure, this embodiment provides a meniscus repair solution that is small, efficient, and less harmful to the patient. Through the precisely designed metal anchor (loop) and the dedicated push device (thimble), the meniscus is accurately sutured while reducing damage to surrounding tissues. This design fully reflects the idea of integration of products and methods, that is, to achieve an improved surgical method through a specific product design.
[0047] In some specific embodiments, the design of the hand-held handle 1 can provide the surgeon with operational convenience and precise control.
[0048] In some specific embodiments, spaces or gaps are provided between adjacent loops 3, and the spaces or gaps are filled by utilizing the resilience of the soft tissue, so that the loop 3 that loses the support of the ejector pin 2 after perforation can be retained outside the soft tissue, and then the loop 3 is transformed into an anchored state by pulling the suture tail.
[0049] In some specific embodiments, a pull line 5 is provided on the front side wall of the loop 3. By pulling the pull line 5 on the front side wall of the loop 3, the loop 3 can be deflected relative to the perforation, thereby better transforming to the anchoring state.
[0050] In some preferred embodiments, a U-shaped hole is provided on the front side wall of the loop 3, one end of the pull wire 5 is retained outside the body, and the other end passes through the U-shaped hole and extends outside the body. The loop 3 is deflected by pulling both ends of the pull wire 5 at the same time, and the pull wire 5 is pulled out by pulling one end.
[0051] In some specific embodiments, the loop 3 at the front end of the ejector pin 2 is provided with a blind hole for the ejector pin 2 to pass through, and the remaining loops 3 are provided with through holes for the ejector pin 2 to pass through. In other specific embodiments, all loops 3 are through-hole structures.
[0052] More specifically, the outer diameter of the loop 3 is between 0.5 mm and 3 mm, the inner diameter is between 0.1 mm and 2.9 mm, and the length is between 5 mm and 30 mm. The size of the ejector pin 2 is adapted to the inner diameter of the loop 3 to ensure precise operation.
[0053] In some specific embodiments, the loop 3 can be optimized according to surgical requirements and the characteristics of the fixation line, and can adopt a double U-shape, a V-shape or other geometric shapes to improve the suturing effect and stability.
[0054] In some specific embodiments, a special coating can be added to the surface of loop 3 to improve its performance in the body, such as increasing antibacterial properties, improving biocompatibility, or promoting tissue healing. These coatings can be customized according to specific application scenarios and patient needs.
[0055] In some specific embodiments, the top of the ejector pin 2 may have different designs, such as a pointed tip, a blade tip, an angular tip, etc. These different designs may be selected according to the needs of the surgical operation so as to better penetrate the tissue or more accurately place the loop 3.
[0056] In some specific embodiments, the material and shape of the ejector pin 2 can also be adjusted according to surgical requirements. For example, a more flexible or harder material can be selected to adapt to different surgical environments and operating styles.
[0057] By providing these variations and optional features, the microneedle meniscus suturing device of this embodiment is not only innovative in prototype design, but also, through these potential variations, can better adapt to different surgical needs, providing doctors and patients with more choices and higher surgical efficiency.
[0058] In some specific embodiments, Figure 2 As shown, the one-way limiting structure includes a one-way limiting member 6 which is arranged on the outer wall of the ejector pin 2 and extends obliquely forward, and a one-way limiting matching member 7 which is arranged on the inner wall of the loop 3; the one-way limiting member 6 is an elastic member, so that when the ejector pin 2 moves forward, the one-way limiting member 6 can interfere with the one-way limiting matching member 7, thereby pushing the loop 3 forward together; when the ejector pin 2 moves backward, it can be elastically deformed to pass through the one-way limiting matching member 7, and follow the ejector pin 2 to exit the loop 3.
[0059] More specifically, the one-way limiter 6 is a rod-shaped member or a sheet-shaped member, and the one-way limiter matching member 7 is a loop structure. More preferably, the rear side surface of the one-way limiter matching member 7 is an inclined surface extending backward from the inside to the outside, so that when pushed forward, the one-way limiter 6 and the one-way limiter matching member 7 fully interact with each other.
[0060] In some specific embodiments, the ejector pin 2 is a telescopic sleeve, more preferably a controllably telescopic sleeve structure.
[0061] In some specific embodiments, the ejector pin 2 is movably arranged on the hand-held handle 1. Specifically, the movement setting can be realized by the meshing transmission effect of the rack at the tail of the ejector pin 2 and the gear on the hand-held handle 1; it can also be realized by a screw nut structure, where the screw is arranged at the tail of the ejector pin 2, and the movement of the ejector pin 2 is controlled by rotating the nut.
[0062] Traditional meniscus anchor materials, such as PEEK (polyetheretherketone) and polylactic acid, also have their own problems. PEEK, as a non-degradable material, may remain in the body for a long time, causing patients to worry about biocompatibility and long-term safety. Although polylactic acid is relatively new, its mechanical properties are relatively poor, which limits its application in meniscus suturing. Therefore, the loop 3 in this embodiment is selected from one of biodegradable zinc and its alloy loops, biodegradable magnesium and its alloy loops, or biodegradable iron and its alloy loops, such as Zn-0.5Li alloy, Zn-Cu-Li alloy, Fe 0.6 P, etc., these materials have excellent biocompatibility and degradability. Similarly, the suture 4 can be a biodegradable suture, such as polylactic acid suture.
[0063] The above description of the embodiments is to facilitate the understanding and use of the utility model by those skilled in the art. It is obvious that those familiar with the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the utility model is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the utility model without departing from the scope of the utility model should be within the scope of protection of the utility model.
Claims
1. A micro-needle meniscus suturing device, characterized in that: include Handle (1); The ejector pin (2) is arranged on the hand-held handle (1) and has a front end that is movable; A plurality of loops (3) are provided and are sequentially sleeved on the front end of the ejector pin (2) along the moving direction, the front end of the loop (3) is pointed, and sutures (4) are provided between the loops (3); A one-way limiting structure is provided between the front end of the ejector pin (2) and the inner wall of the loop (3), so that the front end of the ejector pin (2) can push forward to support the loop (3) and retract from the loop (3).
2. The micro-needle meniscus suturing device according to claim 1, characterized in that: A pull line (5) is provided on the front side wall of the loop (3).
3. The micro-needle meniscus suturing device according to claim 1, characterized in that: The loop (3) at the front end of the ejector pin (2) is provided with a blind hole for the ejector pin (2) to penetrate, and the remaining loops (3) are provided with through holes for the ejector pin (2) to pass through.
4. The micro-needle meniscus suturing device according to claim 1, characterized in that: The loop (3) is provided with a through hole for the ejector pin (2) to pass through.
5. The micro-needle meniscus suturing device according to claim 1, characterized in that: The one-way limiting structure comprises a one-way limiting member (6) provided on the outer wall of the ejector pin (2) and extending obliquely forward, and a one-way limiting matching member (7) provided on the inner wall of the loop (3); The one-way limiting member (6) is an elastic member, so that when the one-way limiting member (6) moves forward following the ejector pin (2), it can interfere with the one-way limiting matching member (7), and when moving backward, it can withdraw following the ejector pin (2).
6. The micro-needle meniscus suturing device according to claim 5, characterized in that: The one-way limiting member (6) is a rod-shaped member or a sheet-shaped member, and the one-way limiting matching member (7) is a loop structure.
7. The micro-needle meniscus suturing device according to claim 6, characterized in that: The rear side surface of the one-way limiting fitting (7) is an inclined surface extending backward from the inside to the outside.
8. The micro-needle meniscus suturing device according to claim 1, characterized in that: Spaces or gaps are provided between adjacent loops (3).
9. The micro-needle meniscus suturing device according to claim 1, characterized in that: The ejector pin (2) is a telescopic sleeve, or the ejector pin (2) is movably arranged on the handheld handle (1).
10. The micro-needle meniscus suturing device according to claim 1, characterized in that: The loop (3) is selected from one of biodegradable zinc and its alloy loops, biodegradable magnesium and its alloy loops, or biodegradable iron and its alloy loops; and / or, The suture (4) is a biodegradable suture.