A gastric wall fixator

Abstract

This invention relates to a gastric wall fixator, comprising a housing and a puncture assembly. The puncture assembly includes two puncture needles, one of which has a channel, and the other puncture needle has a detachment mechanism movably inserted therein. The housing has an inlet, through which a suture thread passes into the channel. The housing has a push rod connected to the detachment mechanism, and the push rod is slidably connected to the housing. An elastic element is fitted onto the push rod. The advantages of this invention are: by fitting an elastic element onto the push rod, no manual intervention by the doctor is required during operation. Simply releasing the push rod allows the elastic element to automatically push the push rod in the opposite direction using its own elasticity, thereby causing the detachment mechanism to accurately retract into the puncture needle. The repositioning action is continuous and stable, completely avoiding the operational errors and unreliability problems caused by manual repositioning, significantly reducing the surgical risks caused by improper repositioning, and simplifying the operation process and reducing the surgical burden on doctors.

Description

Technical Field

[0001] This invention relates to a gastric wall fixator. Background Technology

[0002] Percutaneous gastrostomy is a surgical procedure performed under endoscopic guidance, where a gastrostomy tube is inserted percutaneously into the stomach to provide enteral nutrition or palliative gastrointestinal decompression. It is suitable for patients who cannot eat orally but have normal gastrointestinal function. It is a reversible adjunctive treatment that helps improve the patient's nutritional status.

[0003] A gastric wall fixator is a medical device used to fix the stomach and abdominal walls during percutaneous endoscopic gastrostomy. Its function is to prevent the stomach and abdominal walls from elongating or separating during puncture, which could lead to gastric perforation or peritonitis. It also promotes adhesion between the stomach and abdominal walls, forming a stable fistula. Furthermore, it prevents accidental removal or replacement of the fistula tube during fistula formation.

[0004] Currently, existing gastric wall fixation devices have many shortcomings: First, most fixation devices use a single puncture needle structure, which requires puncturing the gastric wall and inserting sutures, and then removing the sutures through additional operations. The operation steps are cumbersome, the operation time is long, and the sutures are prone to falling off or failure to be removed during the removal process, which affects the efficiency of the operation. Second, the repositioning of the removal mechanism mostly relies on manual operation. Doctors need to control the puncture with one hand and the repositioning with the other hand, which is difficult to operate, prone to errors, and increases the risk of surgery. Summary of the Invention

[0005] The purpose of this invention is to solve the problem of unreliable repositioning of existing gastric wall fixators, which leads to easy suture detachment. This invention proposes a gastric wall fixator that, by incorporating an elastic element on a push rod, eliminates the need for manual intervention by the doctor. Simply releasing the push rod allows the elastic element to automatically push the push rod in the opposite direction, thereby precisely retracting the retrieval mechanism into the puncture needle. This results in a smooth and stable repositioning action, completely avoiding operational errors and unreliability caused by manual repositioning. It significantly reduces the surgical risks associated with improper repositioning, simplifies the procedure, and reduces the surgical burden on doctors.

[0006] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: a gastric wall fixator, comprising a housing and a puncture assembly disposed on the housing, the puncture assembly comprising two puncture needles extending axially, one of the puncture needles having a channel for suture thread to pass through, and the other puncture needle having a detachment mechanism movably passing through it; the housing having an inlet for the suture thread to pass through the inlet into the channel; the housing having a push rod connected to the detachment mechanism, the push rod being slidably connected to the housing; an elastic element being sleeved on the push rod; the detachment mechanism extending the puncture needle and detaching the suture thread passing through the channel by the pushing force of the push rod; and the detachment mechanism retracting into the puncture needle by the elastic force of the elastic element.

[0007] Preferably, the retrieval mechanism includes a steel wire and a steel wire collar, the steel wire collar being disposed at one end of the steel wire, and the other end of the steel wire being connected to a push rod.

[0008] Preferably, the wire loop has an elastic memory function, opening into a ring shape when extended from the puncture needle, and closing into a straight shape when compressed within the puncture needle.

[0009] Preferably, the housing is provided with a fixing seat, and the fixing seat is provided with a through hole, through which the steel wire is inserted into the puncture needle.

[0010] Preferably, the elastic element is a spring, which is sleeved on the push rod. The fixed seat is provided with a sleeve extending axially, which is sleeved on the outside of the spring. A support block is provided inside the housing, and the sleeve is set on the support block. One end of the spring abuts against the fixed seat, and the other end of the spring abuts against the push rod.

[0011] Preferably, the push rod is provided with an outwardly protruding limiting block, and the housing is provided with a limiting part that abuts against the limiting block. When the push rod is pressed into place, the limiting block abuts against the limiting part to restrict the sliding of the push rod and limit the push rod within the housing. The limiting block and the push rod are an integral structure, and the limiting part is a limiting flange or limiting step provided within the housing.

[0012] Preferably, the push rod has an axially extending slot, one end of the push rod has a connecting post, the steel wire has a connecting rod connected to the connecting post, and the connecting rod is detachably mounted on the connecting post. The other end of the push rod has a pressing block, and the pressing block has an anti-slip strip.

[0013] Preferably, the inlet is provided with a threading seat, one end of which is provided with a mounting hole for the puncture needle, and the other end of which is provided with a guide hole communicating with the mounting hole, the diameter of which gradually decreases along the inlet direction.

[0014] Preferably, the gastric wall fixator further includes a fixation plate, which is sleeved on the two puncture needles and can slide along the axial direction of the puncture needles. The fixation plate is provided with a U-shaped rod, which is slidably connected to the housing.

[0015] Preferably, the gastric wall fixator also includes a protective sleeve, which is detachably mounted on the two puncture needles to cover the needle tips when not in use.

[0016] In summary, the advantages of this invention are as follows: By sleeved with an elastic element on the push rod, the retrieval mechanism extends the puncture needle and retrieves the suture passing through the channel due to the pushing force of the push rod. The retrieval mechanism then retracts into the puncture needle due to the elastic force of the elastic element. Therefore, no manual intervention by the doctor is required during operation. Simply releasing the push rod allows the elastic element to automatically push the push rod in the opposite direction, thereby precisely retracting the retrieval mechanism into the puncture needle. The repositioning action is smooth and stable, completely avoiding the operational errors and unreliability problems caused by manual repositioning. This significantly reduces the surgical risks caused by improper repositioning, simplifies the operation process, reduces the surgical burden on the doctor, and the elastic element is sleeved on the push rod. This design ensures that the axis of the elastic element coincides with the sliding axis of the push rod, guaranteeing that the elastic force of the elastic element acts directly along the axial direction of the push rod, eliminating lateral forces. Its extension and retraction direction is completely consistent with the sliding direction of the push rod and the extension and retraction direction of the retrieval mechanism. The elastic force is transmitted directly and without loss, enabling the retrieval mechanism to precisely retract along the axial direction of the puncture needle. This avoids jamming or tilting of the retrieval mechanism due to offset elastic force transmission, ensuring that the retrieval mechanism is completely contained within the puncture needle without any exposed parts. When the entire gastric wall fixator is withdrawn from the patient's body, the sharp steel wire or open collar is completely encased by the rigid puncture needle, ensuring that the entire gastric wall fixator maintains proper contact with the stomach and abdominal wall tissues during its withdrawal path. The "smooth needle" configuration, rather than the "hooked wire" configuration, fundamentally solves the problem of secondary tissue damage caused by unreliable repositioning. Furthermore, because the push rod is directly connected to the retrieval mechanism, the extension and retraction of the elastic element match the sliding stroke of the push rod and the extension length of the retrieval mechanism, preventing over- or under-repositioning and achieving a stable effect of "precise repositioning upon push-out." This overcomes the defect of uncontrollable repositioning stroke in existing technologies. The push rod is configured with a sliding connection on the housing, allowing the housing to provide radial constraint and axial guidance, ensuring that the push rod's repositioning trajectory is repeatable and precise each time. Finally, the puncture assembly is configured with two... The axially extending puncture needles, with one needle having a channel for suture threading and the other having a retrieval mechanism, allow for suture threading and suture retrieval to be completed within the same surgical field. This eliminates the need for repeated instrument adjustments, reducing surgical complexity and significantly shortening operation time. Furthermore, the suture inlet on the housing ensures the suture can be directly inserted into the puncture needle channel from the outside, eliminating the need for complex threading within the body. The suture can also be pre-threaded into the channel, allowing for rapid preparation before or during surgery, eliminating the need for tedious needle threading and suture guiding within a confined surgical field and ensuring a smooth surgical procedure. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a gastric wall fixator according to the present invention; Figure 2 This is a cross-sectional view of a gastric wall fixator according to the present invention; Figure 3 This is a schematic diagram of the retrieval mechanism in this invention; Figure 4 for Figure 3 A magnified view of part A in the image; Figure 5 This is a partial schematic diagram of the suture removal mechanism in this invention. Figure 6 This is a schematic diagram of the push rod structure in this invention; Figure 7 This is a schematic diagram of the threading connector in this invention; Figure 8 This is a schematic diagram of the protective sleeve in this invention.

[0018] Figure label: 1. Housing, 11. Inlet, 12. Support block, 13. Limiting part, 2. Puncture assembly, 21. Puncture needle, 22. Channel, 3. Slinging mechanism, 31. Steel wire, 32. Steel wire collar, 33. Connecting rod, 4. Push rod, 41. Limiting block, 42. Slot, 43. Connecting column, 44. Pressing block, 45. Anti-slip strip, 5. Elastic element, 6. Fixing seat, 60. Through hole, 61. Sleeve, 7. Threading seat, 71. Mounting hole, 72. Guide hole, 8. Fixing plate, 81. U-shaped rod, 9. Protective sleeve, 91. First sleeve, 92. Second sleeve, 93. Connecting plate, 10. Suture thread. Detailed Implementation

[0019] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a gastric wall fixator includes a housing 1 and a puncture assembly 2 disposed on the housing 1. The puncture assembly 2 includes two puncture needles 21 extending axially. One of the puncture needles 21 has a channel 22 for a suture 10 to pass through, and the other puncture needle 21 has a movably inserted loop mechanism 3. The housing 1 has an inlet 11 through which the suture 10 passes into the channel 22. The housing 1 has a push rod 4 connected to the loop mechanism 3, and the push rod 4 is slidably connected to the housing 1. An elastic element 5 is sleeved on the push rod 4. The loop mechanism 3 extends the puncture needle 21 and loops the suture 10 passing through the channel 22 by the pushing force of the push rod 4. The loop mechanism 3 retracts into the puncture needle 21 by the elastic force of the elastic element 5.

[0020] By fitting an elastic element 5 onto the push rod 4, the retrieval mechanism 3 extends the puncture needle 21 and retrieves the suture 10 passing through the channel 22 by the pushing force of the push rod 4. The retrieval mechanism 3 then retracts into the puncture needle 21 by the elastic force of the elastic element 5. Therefore, no manual intervention by the doctor is required during operation. Simply releasing the push rod 4 allows the elastic element 5 to automatically push the push rod 4 in the opposite direction by its own elastic force, thereby precisely retracting the retrieval mechanism 3 into the puncture needle 21. The repositioning action is continuous and stable, completely avoiding operational errors and unreliability caused by manual repositioning, significantly reducing the surgical risks caused by improper repositioning, simplifying the operation process, and reducing the surgical burden on the doctor. Moreover, the elastic element 5 fitting onto the push rod 4 allows the elastic element 5 to... The axis of the elastic element 5 coincides with the sliding axis of the push rod 4, ensuring that the elastic force of the elastic element 5 acts directly along the axial direction on the push rod 4, eliminating the lateral component force. Its extension and retraction direction is completely consistent with the sliding direction of the push rod 4 and the extension and retraction direction of the snare mechanism 3. The elastic force is transmitted directly and without loss, which can drive the snare mechanism 3 to retract precisely along the axial direction of the puncture needle 21, avoiding the snare mechanism 3 from getting stuck or tilting due to the deviation of the elastic force transmission. This ensures that the snare mechanism 3 can be completely contained in the puncture needle 21 without any part being exposed. When the entire gastric wall fixator is withdrawn from the patient's body, the sharp steel wire 31 or the open collar is completely wrapped by the hard puncture needle 21, ensuring that the entire gastric wall fixator is a "smooth needle" to the stomach wall and abdominal wall tissues on the withdrawal path. The "state" instead of the "hooked wire 31" state fundamentally solves the problem of secondary tissue damage caused by unreliable repositioning. On the other hand, since the push rod 4 is directly connected to the retrieval mechanism 3, the extension and retraction of the elastic element 5 matches the sliding stroke of the push rod 4 and the extension length of the retrieval mechanism 3, preventing over-repositioning or under-repositioning and achieving a stable effect of "precise repositioning upon push-out." This solves the defect of uncontrollable repositioning stroke in the prior art. The push rod 4 is set as a sliding connection structure on the housing 1, so that the housing 1 can provide radial constraint and axial guidance for the push rod 4, ensuring that the trajectory of the push rod 4 is repeatable and accurate each time it is repositioned. Finally, the puncture assembly 2 is set as two puncture needles extending axially. 21. Since one of the puncture needles 21 is provided with a channel 22 for the suture 10 to pass through, and the other puncture needle 21 is provided with a retrieval mechanism 3, the suture threading and suture retrieval actions can be completed within the same surgical field of vision. The doctor does not need to repeatedly adjust the position of the instruments, which reduces the complexity of the surgical operation and greatly shortens the surgical operation time. The suture inlet 11 is provided on the housing 1 to ensure that the suture 10 can be directly passed into the puncture needle 21 channel 22 from the outside, without the need for complicated suture threading operations inside the body. Moreover, the suture 10 can be pre-threaded into the channel 22, and the suture preparation can be quickly completed before or during the operation, without the need for cumbersome needle threading and suture guiding operations in a narrow surgical field of vision, ensuring the smoothness of the operation.

[0021] The retrieval mechanism 3 includes a steel wire 31 and a steel wire loop 32. The steel wire loop 32 is disposed at one end of the steel wire 31, and the other end of the steel wire 31 is connected to the push rod 4. The retrieval mechanism 3 is configured with a steel wire 31 and a steel wire loop 32. Since the steel wire 31 has good flexibility and a certain rigidity, it can effectively transmit the linear thrust of the push rod 4 to the distal steel wire loop 32, ensuring that the steel wire loop 32 can smoothly extend from the needle tip. The steel wire loop 32 can improve the success rate of retrieval of the suture 10 and reduce the probability of slippage. Moreover, the entire retrieval mechanism 3 is simple to manufacture and reduces the cost of use. Specifically, the wire loop 32 has an elastic memory function. When it extends from the puncture needle 21, it is in an open loop shape. When it is contained within the puncture needle 21, it is compressed and closes into a straight shape. Because the wire loop 32 is compressed and closes into a straight shape when contained within the puncture needle 21, the overall profile of the wire loop 32 can be reduced, ensuring that there is sufficient space inside the puncture needle 21 to accommodate the wire loop 32. This eliminates the need to thicken the needle tube, maintains the instrument's small diameter, improves space utilization, and prevents... During the repositioning and withdrawal process, the suture 10 slips out. In addition, since the wire loop 32 has an elastic memory function, when the wire loop 32 extends out of the puncture needle 21, the wire loop 32 loses the squeezing force of the puncture needle 21, and the wire loop 32 can automatically open into a ring shape, which can accurately loop the suture 10. The success rate of looping is close to 100%. No additional mechanical unfolding structure is required, which simplifies the design and greatly improves the continuity of operation. In this embodiment, the wire loop 32 is made of nickel-titanium memory alloy.

[0022] The housing 1 is provided with a fixing seat 6, and the fixing seat 6 has a through hole 60. The steel wire 31 passes through the through hole 60 into the puncture needle 21. The fixing seat 6, with its through hole 60, ensures that the steel wire 31 always passes through the puncture needle 21 along a preset path, preventing the steel wire 31 from shaking or bending within the housing 1. This ensures that the retrieval mechanism 3 can accurately extend the puncture needle 21 to complete the suture retrieval action, reducing the probability of operational errors during surgery and ensuring the smooth retraction of the steel wire 31. Firstly, it improves stability and operational reliability. Secondly, the fixing seat 6 provides stable installation and support for the steel wire 31, reducing friction and collision between the steel wire 31 and other internal components of the housing 1 during repeated extension and retraction, thus extending the overall service life. Finally, the through hole 60 of the fixing seat 6 can serve as a positioning reference for the steel wire 31 during assembly, completing the pre-assembly of the steel wire 31 before assembling it into the housing 1. This eliminates the need to directly position the steel wire 31 within the complex space inside the housing 1, simplifying the assembly process, improving production efficiency, and reducing the precision requirements for component processing and assembly, thus facilitating subsequent maintenance.

[0023] The elastic element 5 is a spring, which is sleeved on the push rod 4. The fixed base 6 has an axially extending sleeve 61, which is sleeved on the spring. The housing 1 has a support block 12, and the sleeve 61 is mounted on the support block 12. One end of the spring abuts against the fixed base 6, and the other end of the spring abuts against the push rod 4. By setting the elastic element 5 as a spring, the spring can be flexibly adjusted according to the size of the push rod 4 and the installation space. It can be easily sleeved on the push rod 4 without requiring additional installation space, perfectly fitting the compact internal structure of the gastric wall fixator. Moreover, the spring has a long fatigue life, which can fully meet the needs of multiple operations of the gastric wall fixator during surgery and ensure the stability of the product's performance within its shelf life. The support block 12 inside the housing 1 can prevent the spring from tilting or twisting during the extension and retraction process, ensuring that the spring force always acts axially, making the extension and retraction of the sleeve 3 more stable and smooth. In addition, by setting the support block 12 inside the housing 1, the sleeve 61 can be positioned to prevent the sleeve 61 from being suspended or connected only by a single point of the fixed seat 6, ensuring that the sleeve 61, the puncture needle 21, and the push rod 4 are coaxial, preventing the sleeve 61 from tilting when the spring extends and retracts. Moreover, the support block 12 can improve the rigidity of the entire housing 1. Finally, the two ends of the spring are respectively abutted against the fixed seat 6 and the push rod 4 to form a stable force closed loop. When the push rod 4 pushes the sleeve 3 to extend, the spring is compressed evenly. When the spring force is released, it can accurately drive the push rod 4 to retract, avoiding component wear caused by uneven local force and improving the durability of the equipment.

[0024] The push rod 4 is provided with an outwardly protruding limiting block 41, and the housing 1 is provided with a limiting part 13 that abuts against the limiting block 41. When the push rod 4 is pressed into place, the limiting block 41 abuts against the limiting part 13 to restrict the sliding of the push rod 4 and limit the push rod 4 within the housing 1. The limiting block 41 and the push rod 4 are an integral structure. The limiting part 13 is a limiting flange or limiting step provided within the housing 1. The setting of the limiting block 41 and the limiting part 13 can effectively limit the stroke of the push rod 4, prevent the push rod 4 from being completely pushed out of the housing 1 and causing damage to the whole, or prevent the spring from being over-compressed and permanently deformed, thus improving the overall service life. Secondly, when the limiting block 41 and the limiting part 13 are pressed into place, the limiting block 41 and the limiting part 13 abut against each other, thus limiting the sliding of the push rod 4 and limiting the push rod 4 within the housing 1. When the limiting part 13 abuts, the user will feel obvious resistance or a "click" sensation, indicating that the retrieval mechanism 3 has been fully extended, which makes it easier for the doctor to control the rhythm of operation and prevents the push rod 4 from coming out of the housing 1 during use. Finally, setting the limiting block 41 and the push rod 4 as an integral structure simplifies the installation process between the limiting block 41 and the push rod 4, improves the connection strength between the limiting block 41 and the push rod 4, and has high overall structural strength, which improves the service life of the entire push rod 4. Setting the limiting part 13 as a limiting flange or limiting step set in the housing 1 can meet different installation requirements and improve the use effect. This embodiment preferentially adopts the limiting step, which has a compact overall structure and is easy to install.

[0025] The push rod 4 has an axially extending slot 42. One end of the push rod 4 has a connecting post 43. The steel wire 31 has a connecting rod 33 connected to the connecting post 43, and the connecting rod 33 is detachably mounted on the connecting post 43. The other end of the push rod 4 has a pressing block 44 with an anti-slip strip 45. The slot 42 allows the push rod 4 to undergo slight radial deformation when the spring returns and resets, allowing the limiting block 41 to smoothly disengage from the limiting part 13 inside the housing 1, thus preventing the limiting block 41 from contacting the limiting part 13. To address the issues of part 13 getting stuck and push rod 4 failing to reset, the spring returns smoothly, allowing the sleeve mechanism 3 to quickly return to its original position. Additionally, the slot 42 facilitates the quick insertion of push rod 4 into the housing 1, reducing assembly difficulty. Furthermore, the connecting rod 33 and connecting post 43 are designed as detachable installation structures, facilitating the replacement and cleaning of the sleeve mechanism 3 without requiring the replacement of the entire push rod 4, significantly reducing costs. Finally, the pressing block 44 increases the contact area between the push rod 4 and the user, while the anti-slip strip 45 increases the friction between the operator and the pressing block 44, preventing slippage during pressing.

[0026] The suture inlet 11 is provided with a suture seat 7. One end of the suture seat 7 is equipped with a mounting hole 71 for the puncture needle 21, and the other end of the suture seat 7 is provided with a guide hole 72 communicating with the mounting hole 71. The diameter of the guide hole 72 gradually decreases along the suture inlet direction. Specifically, the guide hole 72 is one of a stepped shape, a frustum shape, or an arc shape. In this embodiment, the guide hole 72 is preferably a frustum shape. The suture seat 7 is provided with a mounting hole 71, which is conducive to the installation and fixation of the puncture needle 21, ensuring that the guide hole 72 and the channel 22 of the puncture needle 21 are completely coaxial, and the suture 10 is guided without misalignment, reducing the resistance of suture threading. Secondly, setting the diameter of the guide hole 72 to gradually decrease along the suture inlet direction is conducive to the rapid introduction of the suture 10 and can accurately align with the channel 22, guiding the suture to pass smoothly, avoiding suture bending, knotting, and jamming, greatly simplifying the preoperative suture threading steps, shortening the surgical preparation time, and improving the overall smoothness of operation.

[0027] The gastric wall fixator also includes a fixation plate 8, which is sleeved on the two puncture needles 21 and can slide along the axial direction of the puncture needles 21. The fixation plate 8 is provided with a U-shaped rod 81, which is slidably connected to the housing 1. In use, the fixation plate 8 can abut against the external surface of the body, limiting the depth of the puncture needles 21 into the body and preventing damage to other organs behind the stomach wall due to excessive puncture, thus improving surgical safety. The fixation plate 8 can slide along the axial direction of the puncture needles 21, and its position can be flexibly adjusted according to the patient's actual situation and surgical needs, accurately controlling the depth of the puncture needles 21 into the stomach wall to meet different operational needs without affecting normal puncture operations, thus effectively improving surgical safety. Finally, the U-shaped rod 81 ensures the stability of the sliding of the fixation plate 8.

[0028] The gastric wall fixator also includes a protective sleeve 9, which is detachably mounted on the two puncture needles 21. The protective sleeve 9 covers the needle tips of the puncture needles 21 when not in use. The protective sleeve 9 effectively prevents the needle tips from scratching the operator or patient, avoids contamination of the needle tips, and prevents the needle tips from being deformed by impacts, thus preventing them from affecting the puncture effect. Furthermore, since the protective sleeve 9 is detachably mounted on the two puncture needles 21, it can be quickly removed during use without affecting the normal operation of the puncture needles 21, making assembly and disassembly convenient. Specifically, the protective sleeve 9 includes a first sleeve 91 and a second sleeve 92 arranged parallel to each other, and a connecting plate 93 connecting the first sleeve 91 and the second sleeve 92, making the protective sleeve 9 as a whole C-shape or U-shape. The structure allows medical staff to simultaneously cover or expose the tips of two puncture needles 21 with a single installation or removal operation, eliminating the need to operate two separate protective caps. This significantly shortens preoperative preparation and postoperative cleanup time, improving the smoothness of the surgical procedure. Furthermore, both the first sleeve 91 and the second sleeve 92 are axially extending hollow cylinders with internal cavities for inserting the puncture needles 21. This ensures that the two puncture needles 21 maintain a distance under protection, preventing mutual collision and wear during transportation, further enhancing the protective effect. The opening of the cavities is positioned away from the connecting plate 93. The inner surface of the connecting plate 93 forms the closed end of the first sleeve 91 and the second sleeve 92, used to block the tips of the puncture needles 21. The system provides a defined limiting endpoint for the needle tip, ensuring it is completely contained within a safe area. Furthermore, the first sleeve 91, the second sleeve 92, and the connecting plate 93 are integrally molded. This integrated structure enhances the connection strength of the entire protective sleeve 9 and reduces processing costs. The thickness of the connecting plate 93 is greater than the wall thickness of the first sleeve 91 and the second sleeve 92, effectively preventing the needle tip from piercing the protective sleeve 9. The protective sleeve 9 is made of medical-grade hard polymer material, rubber, or stainless steel. Different materials can be selected for the protective sleeve 9 according to different needs. In this embodiment, rubber is preferred, giving the protective sleeve 9 good elasticity and preventing accidental detachment after installation. The rubber provides cushioning when the needle tip impacts, better protecting the needle tip from being blunted by impacts. It also offers a good feel and optimal anti-slip performance.

[0029] In use, first remove the protective cover 9, and insert the suture 10 through the guide hole 72 of the suture holder 7, and then through the mounting hole 71 and the channel 22 in sequence, so that one end of the suture 10 extends out of the tip of the puncture needle 2; then hold the housing 1 and insert the two puncture needles 2 to the predetermined position on the stomach wall, push the U-shaped rod 81, and drive the fixing plate 8 to slide along the puncture needle to fit the abdominal wall, thereby limiting the puncture depth; then press the push rod 4, and the push rod 4 slides along the housing 1, pushing the steel wire 31 to drive the steel wire collar 32 to extend out of the puncture needle 2. After the steel wire collar 32 is freed from the compression, it automatically opens into a ring shape and loops the suture 10 that has passed through the channel 22; after looping, release the pressing block, and the spring returns to its original position under the action of elasticity, pushing the push rod to slide in the opposite direction, driving the steel wire and steel wire collar to retract into the puncture needle, and the steel wire collar is squeezed and closed into a straight shape; finally, pull out the puncture needle to complete the stomach wall fixation operation.

[0030] In addition to the preferred embodiments described above, there are other embodiments of the present invention. Those skilled in the art can make various changes and modifications based on the present invention, and all such changes and modifications should fall within the scope defined by the appended claims, as long as they do not depart from the spirit of the present invention.

Claims

1. A gastric wall fixator, comprising a housing, characterized in that: It also includes a puncture assembly disposed on the housing, the puncture assembly comprising two puncture needles extending axially, one of which has a channel for sutures to pass through, and the other puncture needle having a detachment mechanism movably inserted therein. The housing has a suture inlet, through which the suture passes into the channel. The housing has a push rod connected to the detachment mechanism, and the push rod is slidably connected to the housing. An elastic element is sleeved on the push rod. The detachment mechanism extends the puncture needle and detaches the suture passing through the channel by the pushing force of the push rod. The detachment mechanism retracts back into the puncture needle by the elastic force of the elastic element.

2. The gastric wall fixator according to claim 1, characterized in that: The snatching mechanism includes a steel wire and a steel wire collar, with the steel wire collar located at one end of the steel wire and the other end of the steel wire connected to a push rod.

3. A gastric wall fixator according to claim 2, characterized in that: The steel wire loop has an elastic memory function; when it extends out of the puncture needle, it is in an open loop shape, and when it is contained inside the puncture needle, it is compressed and shrinks into a straight shape.

4. A gastric wall fixator according to claim 2, characterized in that: The housing is provided with a fixing seat, and the fixing seat is provided with a through hole, through which the steel wire is inserted into the puncture needle.

5. A gastric wall fixator according to claim 4, characterized in that: The elastic element is a spring, which is sleeved on the push rod. The fixed seat is provided with a sleeve extending axially, which is sleeved on the outside of the spring. A support block is provided inside the housing, and the sleeve is set on the support block. One end of the spring abuts against the fixed seat, and the other end of the spring abuts against the push rod.

6. A gastric wall fixator according to claim 5, characterized in that: The push rod is provided with an outwardly protruding limiting block, and the housing is provided with a limiting part that abuts against the limiting block. When the push rod is pressed into place, the limiting block abuts against the limiting part to restrict the sliding of the push rod and limit the push rod within the housing. The limiting block and the push rod are an integral structure, and the limiting part is a limiting flange or limiting step provided within the housing.

7. A gastric wall fixator according to claim 6, characterized in that: The push rod has an axially extending slot, one end of the push rod has a connecting post, the steel wire has a connecting rod connected to the connecting post, and the connecting rod is detachably installed on the connecting post. The other end of the push rod has a pressing block, and the pressing block has an anti-slip strip.

8. A gastric wall fixator according to claim 1, characterized in that: The inlet is provided with a threading seat, one end of which is equipped with a mounting hole for the puncture needle, and the other end of which is provided with a guide hole communicating with the mounting hole, and the guide hole is in the shape of a frustum with a larger top and a smaller bottom.

9. A gastric wall fixator according to claim 1, characterized in that: The gastric wall fixator also includes a fixation plate, which is sleeved on the two puncture needles and can slide along the axial direction of the puncture needles. The fixation plate is provided with a U-shaped rod, which is slidably connected to the housing.

10. A gastric wall fixator according to claim 1, characterized in that: The gastric wall fixator also includes a protective sleeve that is detachably mounted on the two puncture needles to cover the needle tips when not in use.

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