Reusable puncture stitching instrument with pin protection function

Abstract

The invention discloses a reusable puncture stitching instrument with pin protection, the reusable puncture stitching instrument with pin protection comprises a puncture cannula, a puncture shell cover, a puncture shell and a puncture stitching core, the puncture shell cover is provided with a buckle, the puncture cannula is detachably and fixedly connected with the puncture stitching core through the buckle, and the puncture stitching core is provided with a pin. The puncture shell cover is detachably connected with the puncture shell, the puncture suture core comprises a grab handle, a handle rod, a separation blade set, a puncture tube, a thread pushing rod, a thread pushing needle, a push-pull rod, a guide connecting piece, a side wing, a needle point separation blade, a puncture conical rod and a spring, and the puncture suturing device supports multiple times of suturing and is high in operation efficiency, high in safety, precise in control and convenient to assemble and disassemble, and the insertion needle protection design is adopted.

Description

TECHNICAL FIELD

[0001] The present application relates to a reusable puncture suture device with needle protection. BACKGROUND

[0002] Laparoscopic surgery has gradually replaced traditional surgery and has been widely used in general surgery, gynecology and cardiothoracic surgery because of its small trauma, little physiological disturbance to patients, good cosmetic effect, light pain and fast recovery. Laparoscopic surgery requires a hole to be made in the patient's abdomen for surgery under laparoscopic observation, and fascia suture is required after surgery. Fascia suture is difficult to operate because of the small incision, deep inner wall and other characteristics. The current solutions are manual suture and fascia suture device suture. Manual suture is suitable for thin patients, but for obese patients, the abdominal wall tissue is thick and cannot meet the precise and effective suture of the puncture incision, resulting in a series of complications such as bleeding, infection, puncture hole hernia and injury. The fascia suture device can suture the fascia of obese patients, but the puncture device needs to be removed first, and then the fascia suture device is operated, which is complex and time-consuming, increasing the risk of infection for patients.

[0003] To solve the above technical problems, CN113907817A discloses a puncture suture device that can pre-arrange sutures. This puncture suture device can puncture the abdominal cavity under the laparoscope, establish a channel for laparoscopic surgery, provide a way to pre-knot sutures, and can pull the sutures on both sides of the incision out of the sleeve for pre-knotting without affecting intraoperative operation. However, from the device, this puncture suture device is a disposable instrument. During surgery, the instrument cannot be used again after activation, and it cannot complete the suture of the expanded hole. In addition, there is no protection device for the push wire needle after activation, which may damage normal tissues. SUMMARY

[0004] The purpose of the present application is to overcome the shortcomings of the prior art and provide a reusable puncture suture device with needle protection.

[0005] To achieve the above purpose, the present application is realized by the following technical solutions:

[0006] The reusable puncture suture device with pin protection comprises a puncture sleeve, a puncture shell cover, a puncture shell, a puncture suture core, the puncture shell cover is provided with a buckle, the puncture sleeve is detachably fixedly connected with the puncture suture core through the buckle, the puncture shell cover is detachably connected with the puncture shell, the puncture suture core comprises a handle, a handle rod, a baffle group, a puncture tube, a push wire rod, a push wire needle, a push-pull rod, a guide connecting piece, a side wing, a needle tip baffle, a puncture cone rod and a spring, the puncture sleeve is sleeved on the puncture tube, the handle is fixedly connected with the handle rod, the baffle group is installed in the puncture shell, the baffle group is slidably connected with the handle rod and can be fixedly connected, the baffle group is fixedly connected with the push-pull rod, the guide connecting piece is fixed in the puncture tube, the push-pull rod is rotatably connected with the side wing after passing through the guide connecting piece, the handle rod is slidably connected with the push wire rod and can be fixedly connected by rotation, the push wire rod is fixedly connected with the push wire needle, both sides of the guide connecting piece are provided with guide grooves, the side wing is provided with an opening, the needle tip baffle is provided with a insertion hole, the push wire needle is slidably arranged in the guide groove, the push wire needle can move downward away from the guide groove, and sequentially passes through the opening and the insertion hole during the movement, the guide groove, the opening and the insertion hole are coaxially arranged to form a guide channel for the push wire needle to slide through, one end of the spring is fixedly connected with the side wing, the other end of the spring is fixedly connected with one end of the needle tip baffle, one end of the needle tip baffle is rotatably connected with the side wing, the other end of the needle tip baffle is a free end, an axial limiting structure is arranged on the inner wall of the puncture shell, a matching part is arranged on the baffle group and matched with the axial limiting structure, when the baffle group rotates relative to the puncture shell to the position where the matching part is aligned with the axial limiting structure, the axial limiting structure abuts against the matching part, so that the downward movement of the baffle group along the axial direction is limited, the puncture cone rod is fixedly connected with the guide connecting piece, the push wire needle is provided with a preset slot for binding a suture, the side wing is provided with a wire hanging groove, when the push wire needle moves upward along the direction close to the guide groove, the suture prearranged in the preset slot can be hooked by the wire hanging groove, and the suture is moved along a preset path through the guiding and limiting effect of the guide groove, and finally the suture is left and limited in the wire hanging groove.

[0007] Preferably, the handle comprises a handle cap and a handle cover, and the handle cap is fixedly connected with the handle rod through the handle cover.

[0008] Preferably, the baffle assembly includes an upper baffle and a lower baffle, which are sequentially sleeved on the handle rod and the push-pull rod. The upper baffle is fixedly connected to the handle rod, and both the upper and lower baffles are fixedly connected to the push-pull rod. The bottom of the lower baffle has a groove, and the upper and lower sides of the handle rod are provided with protrusions that fit the groove. When the handle rod moves along the sliding direction to the corresponding position of the groove, the protrusions fit into the groove.

[0009] Preferably, the mating part is located on the lower baffle, and the axial limiting structure is provided with a ball. When the lower baffle rotates relative to the puncture shell to the position where the mating part is aligned with the ball, the axial limiting structure abuts against the mating part, thereby restricting the lower baffle from moving downward along the axial direction.

[0010] Preferably, the device also includes a positioning block, which is inserted into the push rod. The push rod is fixedly connected to the push pin, and the push-pull rod passes through the push rod.

[0011] Preferably, the push rod, push needle, push-pull rod, and puncture cone are all located inside the puncture tube, with the tip of the puncture cone extending beyond the bottom of the puncture tube to achieve the puncture guidance function.

[0012] Preferably, the number of push pins is two.

[0013] Preferably, two push pins are intersected and inserted into the guide groove, and each push pin is slidably engaged with the guide groove.

[0014] Preferably, the puncture shell cover is located on the outside of the puncture shell.

[0015] Preferably, the connection between the handle and the push rod, which slides together and can be locked in place by rotation, is as follows: the handle and the push rod slide together, and the handle can rotate relative to the push rod. The top of the push rod is provided with a groove and a boss, and the handle is provided with a hook groove and a locking part. The boss and the hook groove are adapted to each other. When the handle slides to the top position of the push rod, rotating the handle can make the locking part engage with the groove, thereby fixing the handle and the push rod in place.

[0016] The beneficial effects of this invention are as follows:

[0017] 1. High degree of functional integration and strong adaptability

[0018] This invention integrates puncture and incision suturing functions into one unit. It can be used with conventional cannulas or operated independently. There is no need to change instruments for different surgical steps, which greatly improves the adaptability to various laparoscopic surgeries and simplifies the process of preparing surgical instruments.

[0019] 2. Supports multiple sutures, resulting in high operational efficiency.

[0020] The push needle tip has a pre-set groove for binding sutures, which can achieve multiple suturing of a single incision through simple multiple suture clamping operations. At the same time, the instrument is reusable, and one set of puncture suture can meet the doctor's need for multiple suturing of the same surgical site. Moreover, the pre-set suture method is quick and convenient, effectively shortening the operation time.

[0021] 3. Pin protection design for high safety.

[0022] When the pusher needle passes through the flank, it will push up the needle tip guard. Under the action of the tension spring, the needle tip guard can limit the length of the pusher needle to pass through, avoiding damage to the surrounding normal tissue caused by excessive pushing of the pusher needle; and the suturing operation is not affected by the position of the puncture hole, so the doctor can operate the instrument with more confidence and reduce the instrument-related risks during the operation.

[0023] 4. Ingenious structural design and precise operation

[0024] The handle assembly, puncture shell assembly, and other components of this invention have clearly defined functions and a clear operating logic. The side wings can be unfolded by pulling out the handle, and the side wing position can be locked by rotating the handle clockwise. The contact beads set inside the puncture shell can judge the movement position of the handle rod assembly through contact feedback, which makes it easier for doctors to accurately control the operation rhythm. The unfolding and closing of the side wings are driven by the push-pull rod, and with the assistance of the guide connecting block, the movement is smooth and stable.

[0025] 5. Easy to assemble and disassemble, and can be reused in the same surgery.

[0026] Most of the components of the instrument are connected and fixed by means of slots, grooves, snap-fit, etc., making the assembly and disassembly process simple. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0028] Figure 2 A cross-sectional view of the structure after the puncture cannula has been removed;

[0029] Figure 3 This is a schematic diagram of the structure between the push needle, push-pull rod, side wings, and puncture cone.

[0030] Figure 4 This is a structural diagram showing the relationship between the push pin, side wings, and guide connector;

[0031] Figure 5 A schematic diagram of the side wing and push-thread needle;

[0032] Figure 6 This is a schematic diagram of the bottom structure of the side wing;

[0033] Figure 7 This is a schematic diagram of the structure between the ball bearing, the axial limiting structure, and the mating parts.

[0034] Figure 8 This is a schematic diagram of the structure between the push pin, push-pull rod, push-pull rod, and positioning block;

[0035] Figure 9 This is a schematic diagram of the structure between the handle and the push rod;

[0036] Figure 10 This is a schematic diagram of the handle lever structure;

[0037] Figure 11 This is a schematic diagram of the handle rod and the baffle assembly.

[0038] Figure 12 A schematic diagram of the suture pusher needle pre-tied to the suture suture device;

[0039] Figure 13 for Figure 12 A magnified view of part A;

[0040] Figure 14 A schematic diagram of the structure for pushing the pusher needle out by pushing the handle after the side wing is pressed against the abdominal wall;

[0041] Figure 15 This is a diagram illustrating the state where the push needle passes through the side wing and pushes up the needle tip guard, making it impossible to slowly retract the needle tip when pushing it out;

[0042] Figure 16 for Figure 15 A magnified view of a portion of component B;

[0043] Figure 17 A schematic diagram showing the state of the puncture suture device being pushed into the abdominal cavity;

[0044] Figure 18 This is a schematic diagram showing the state of the suture core being withdrawn after the trocar has entered the abdominal cavity.

[0045] Figure 19 A diagram illustrating how to securely knot the stitches. Detailed Implementation

[0046] The technical solution of the present invention will be further described below with reference to the accompanying drawings:

[0047] like Figures 1 to 11As shown, a reusable puncture suture device with needle insertion protection is characterized by comprising a puncture cannula 1, a puncture outer shell cover 5, a puncture outer shell 6, and a puncture suture core. The puncture outer shell cover 5 is provided with a buckle 51. The puncture cannula is detachably and fixedly connected to the puncture suture core via the buckle 51. The puncture outer shell cover 5 is detachably connected to the puncture outer shell 6. The puncture suture core includes a handle, a handle rod 4, a baffle assembly, a puncture tube 9, a suture pusher rod 10, a suture pusher needle 12, a push-pull rod 13, a guide connector 14, a side wing 15, a needle tip baffle 16, a puncture cone rod 17, and a spring 18. The puncture cannula 1 is fitted onto the puncture tube 9. The handle is fixedly connected to the handle rod 4, and the baffle assembly is installed... Inside the puncture casing 6, the baffle assembly is slidably engaged with and fixedly connected to the handle rod 4. The baffle assembly is fixedly connected to the push-pull rod. The guide connector 14 is fixed inside the puncture tube 9. The push-pull rod 13 passes through the guide connector 14 and is rotatably connected to the side wing 15. The handle rod 4 is slidably engaged with the push-wire rod 10 and can be locked in place by rotation. The push-wire rod 10 is fixedly connected to the push-wire needle 12. The guide connector 14 has guide grooves 141 on both sides. The side wing 15 has an opening 151. The needle tip baffle 16 has an insertion hole 161. The push-wire needle 12 passes through the guide groove 141 and is slidably engaged with the guide groove 141. The needle 12 can move downwards away from the guide groove 141, and during the movement, it passes through the opening 151 and the insertion hole 161 in sequence. The guide groove 141, the opening 151, and the insertion hole 161 are coaxially arranged to form a guide channel for the needle 12 to slide through. One end of the spring 18 is fixedly connected to the side wing 15, and the other end of the spring 18 is fixedly connected to one end of the needle tip baffle. One end of the needle tip baffle is rotatably connected to the side wing 15, and the other end of the needle tip baffle is a free end. An axial limiting structure 61 is provided on the inner wall of the puncture shell 6. The baffle assembly is provided with a mating part 88 that is adapted to the axial limiting structure 61. When the baffle assembly is in contact with the side wing 141, the needle tip baffle is rotatably connected to the side wing 15, and the needle tip baffle is rotatably connected to the side wing 15. The other end of the needle tip baffle is a free end. An axial limiting structure 61 is provided on the inner wall of the puncture shell 6. An axial limiting structure 61 is provided on the inner wall of the puncture shell 6. An axial limiting structure 61 is provided on the inner wall of the puncture shell 6. When the baffle assembly is in contact with the side wing 141, the needle tip baffle is rotatably connected to the side wing 141, and the needle tip baffle is rotatably connected to the side wing 141. An axial limiting structure 61 is provided on the inner wall of the puncture shell 6. An axial limiting structure 61 is provided on the inner wall of the puncture shell 6. An axial limiting structure 61 is rotatably connected to the side wing 141, and the needle tip baffle is rotatably connected to the side wing When the puncture shell 6 is rotated to the position where the mating part 88 is aligned with the axial limiting structure 61, the axial limiting structure 61 abuts against the mating part 88, thereby restricting the baffle assembly from moving downward along the axial direction. The puncture cone 17 is fixedly connected to the guide connector 14. The push needle 12 is provided with a pre-set groove 121 for binding the suture. The side wing 15 is provided with a hanging groove 152. When the push needle 12 moves upward along the direction close to the guide groove 141, the suture pre-placed in the pre-set groove can be hooked by the hanging groove 152, and the suture moves along a preset path through the guiding and limiting effect of the guide groove 141. Finally, the suture is left and limited in the hanging groove 152.

[0048] like Figure 1 , Figure 2As shown, the grip includes a handle cap 2 and a handle cap 3, wherein the handle cap 2 is fixedly connected to the handle rod 4 via the handle cap 3.

[0049] like Figures 1 to 11 As shown, the baffle assembly includes an upper baffle 7 and a lower baffle 8. The upper baffle 7 and the lower baffle 8 are sequentially sleeved on the handle rod 4 and the push-pull rod 13. The upper baffle 7 and the lower baffle 8 are both fixedly connected to the push-pull rod 13. The bottom of the lower baffle 8 has a groove 81. The upper and lower sides of the handle rod 4 are provided with protrusions 43 that are adapted to the groove 81. When the handle rod 4 moves along the sliding direction to the position corresponding to the groove 81, the protrusions 43 are adapted to the groove 81, and the mating part 88 is located on the lower baffle 8. The axial limiting structure 61 is provided with a ball bearing 611. When the lower baffle 8 rotates relative to the piercing shell 6 to the position where the mating part 88 is aligned with the ball bearing 611, the axial limiting structure 61 abuts against the mating part 88, thereby restricting the lower baffle 8 from moving downward along the axial direction.

[0050] like Figure 8 As shown, it also includes a positioning block 11, which is fixed inside the puncture tube 9. The positioning block 11 is inserted into the push rod 10, which is fixedly connected to the push needle 12. The push rod 13 passes through the push rod 10.

[0051] like Figure 1 , Figure 2 As shown, the push rod 10, push needle 12, push-pull rod 13, guide connector 14, and puncture cone 17 are all located inside the puncture tube 9. The tip of the puncture cone 17 extends out of the bottom end of the puncture tube 9 to achieve the puncture guidance function. There are two push needles 12.

[0052] like Figures 3 to 11 As shown, two push pins 12 are intersected and pass through the guide groove 141, and each push pin 12 slides in conjunction with the guide groove 141.

[0053] like Figure 1 , Figure 2 As shown, the puncture shell cover 5 is located outside the puncture shell 6.

[0054] like Figures 8 to 11As shown, the connection between the handle rod 4 and the push rod 10, which slides together and can be locked in place by rotation, is specifically as follows: the handle rod 4 and the push rod 10 slide together, and the handle rod 4 can rotate relative to the push rod 10. The top of the push rod 10 is provided with a groove 101 and a boss 102. The handle rod 4 is provided with a hook groove 41 and a locking part 42. The boss 102 and the hook groove 41 are adapted to each other. When the handle rod 4 slides to the top position of the push rod 10, rotating the handle rod 4 can make the locking part 42 engage with the groove 101, thereby fixing the handle rod 4 and the push rod 10 in place. Therefore, it can be seen that the sliding range of the handle rod 4 is between the boss 102 and the positioning block 11. When the handle rod 4 slides to the boss 102, pulling the handle rod 4 upward will cause the handle rod 4 to hook the boss 102 and move upward through the hook groove 41. Thus, the handle rod 4 can drive the push rod 10 to move upward. When the handle rod 4 slides to the positioning block 11, pressing the handle rod 4 downward will cause the protrusion 43 on the lower side of the handle rod 4 to fit into the groove 81. At this time, the handle rod 4 is fixedly connected to the lower baffle 8. The handle rod can then drive the lower baffle 8 to move downward, which in turn drives the push-pull rod to move downward. This allows the push-pull rod to rotate the side wing, so that the side wing is no longer locked, thereby causing the side wing to retract and close.

[0055] When the handle 4 slides to the boss 102 position, rotate the handle to make the locking part 42 on the handle lock engage with the slot 101 on the push rod 10, so that the handle and the push rod 10 are fixedly connected. The handle drives the push needle to move downward in the direction away from the guide groove 141 or upward in the direction of the guide groove 141 through the push rod 10, thereby performing the needle extension or retraction action.

[0056] like Figures 1 to 11 As shown, when the handle is rotated clockwise, the engaging part 42 on the handle engages with the slot 101 on the push rod 10, thus fixing the handle and the push rod 10 together. The handle, through the push rod 10, drives the push needle to move downwards away from the guide groove 141 or upwards towards the guide groove 141. At the same time, the handle drives the lower baffle 8 to rotate. The axial limiting structure 61 is provided with a ball bearing 611. When the lower baffle 8 rotates relative to the piercing shell 6 to the position where the mating part 88 aligns with the ball bearing 611, the ball bearing 611 will make a sound, indicating that the rotation is complete. The axial limiting structure 61 abuts against the mating part 88, thereby restricting the lower baffle 8 from moving downwards along the axial direction. As a result, the lower baffle 8 cannot move, and the push rod cannot move either. The push rod is locked, preventing the side wings from rotating and thus locking them, preventing them from wobbling up and down.

[0057] like Figures 1 to 11As shown, when the handle rod 4 moves along the sliding direction to the corresponding position of the groove 81, both the upper and lower protrusions 43 are adapted to the groove 81. At this time, the handle rod 4 is fixedly connected to the lower baffle 8. The handle rod can drive the lower baffle 8 to move up and down, thereby the lower baffle 8 drives the push-pull rod to move up and down, thereby the push-pull rod can drive the side wings to rotate, so that the side wings are not locked, thereby driving the side wings to unfold or retract. When the handle rod drives the lower baffle 8 to move upward, the lower baffle 8 drives the push-pull rod to move upward, thereby the push-pull rod can drive the side wings to unfold, and vice versa.

[0058] like Figure 5 As shown, after the pusher needle passes through the side wing, it lifts the needle tip guard. Under the tension of the spring, the lifting angle of the needle tip guard, i.e., the length of the pusher needle that has passed through, is limited, thus preventing the needle tip from damaging normal tissue. When the pusher needle retracts, the suture tied at the pre-set groove is hooked by the hook at the hanging groove and guided to the groove, where it is finally left in the hanging groove.

[0059] like Figure 12 , Figure 13 , Figure 1 As shown, suture 100 is pre-tied to the push needle of the suture applicator, and the suture binding method is as follows. Figure 13 As shown, it is tied in the pre-set slot. With the palm against the handle cap 2, and two fingers holding the puncture shell, insert the puncture suture device into the designated position in the abdominal wall. Using the principle described above, unfold the side wings, adjust the instrument position to make the side wings fit tightly against the abdominal wall, rotate the handle clockwise to lock the side wings, and the push needle is in the ready-to-fire state.

[0060] like Figures 14 to 16 As shown, after the side wing is pressed against the abdominal wall, pushing the handle pushes out the thread pusher needle through the abdominal wall. The thread pusher needle passes through the side wing and pushes up the needle tip stop, making it impossible to pull back slowly during the pusher needle's retraction. During the retraction of the thread pusher needle, the suture thread tied on the pre-set groove will be hooked by the thread hanging groove (e.g., Figure 16 (As shown).

[0061] like Figures 17 to 19 As shown, after the push needle is retracted, rotate the handle to release the side wing lock, push the handle to retract the side wing, and continue to push the puncture suture into the abdominal cavity. After the puncture cannula enters the abdominal cavity, pull out the puncture suture core, take out the suture, and tie the suture securely.

[0062] like Figures 1 to 11 As shown, pulling out the handle unfolds the side wings, and rotating the handle clockwise locks them in place. The four push needles, after passing through the side wings, lift the needle tip guard. The spring tension limits the lifting angle of the guard, i.e., the length of the push needles that have passed through, thus preventing the needle tip from damaging normal tissue. Figure FiveWhen the push needle retracts, the thread tied to the pre-set groove is hooked by the hook at the hanging groove and guided to the groove, and is finally left in the hanging groove.

[0063] The method of using and operating this invention is as follows:

[0064] 1. The suture is pre-tied to the pusher needle of the puncture suture device (e.g., Figure 13 ), the stitching binding method is as follows Figure 12 The binding method is the same, and the wires are bound in the pre-set slots.

[0065] 2. For example Figure 1 , Figure 2 As shown, with the handle cap at position 2, hold the puncture shell with two fingers and insert the puncture suture device into the designated position in the abdominal wall. Expand the side wings through the above step 1, rotate the handle clockwise to lock the side wings, adjust the instrument position to make the side wings fit tightly against the abdominal wall, and the push needle is in the ready-to-fire state.

[0066] 3. For example Figures 14 to 16 As shown, after the side wing is pressed tightly against the abdominal wall, push the handle to push out the thread pusher needle through the abdominal wall. The thread pusher needle passes through the side wing and pushes up the needle tip guard, making it impossible to push out. Slowly pull out the handle. During the retraction of the thread pusher needle, the thread tied on the pre-set groove will be hooked by the thread hanging groove (see...). Figure 16 ).

[0067] 4. After retracting the pusher needle, if Figures 17 to 19 As shown, rotate the handle to release the side wing lock, push the handle to retract the side wing, and continue to push the puncture suture device into the abdominal cavity. After the cannula enters the abdominal cavity, press the buckle on the puncture shell 6 to unlock the puncture suture core and the puncture cannula, pull the puncture suture core upward to pull out the puncture tube, bring out the suture 100, tie the suture firmly, and complete the suturing.

[0068] The reusable puncture suture device with needle protection described in this invention has the core advantage of highly integrated functions, combining puncture, abdominal wall dilation, and incision suturing into one device. It can be used with a puncture cannula or operated independently, without being limited by the position of the puncture hole, adapting to the needs of various laparoscopic surgeries. Furthermore, the pusher needle has a pre-set groove, and the side wings have suture hanging grooves, enabling multiple suturing of a single incision. One set of instruments can meet the surgeon's need for repeated suturing, greatly simplifying surgical steps and improving surgical efficiency. The needle protection mechanism is comprehensive; the guide groove of the guide connector, the opening of the side wings, and the insertion hole of the needle tip baffle are coaxially arranged to form a stable guide channel. When the pusher needle passes through, it lifts the needle tip baffle, and the spring tension can limit the lifting angle of the needle tip baffle, thereby limiting the maximum extension of the pusher needle. The extended needle penetration length structurally prevents excessive needle tip protrusion and damage to surrounding normal tissue, thus improving surgical safety. The ingenious structural design allows for precise and convenient operation. The handle and pusher rod are fixed by sliding and rotating engagement via a "protrusion-hook groove" and "locking part-slot." The baffle assembly and puncture shell are rotated and positioned via a "fitting part-axial limiting structure (including a bead)." The audible feedback from the bead contacting the needle indicates that the rotation is complete, while simultaneously locking the side wings to prevent wobbling. The up-and-down sliding of the handle rod synchronously drives the pusher rod to control the extension and retraction of the pusher needle, and drives the push-pull rod to control the expansion or contraction of the side wings. The operation logic is coherent, easy for doctors to learn, and suture pre-positioning is simple. When the pusher needle retracts, the suture hook can stably hold the indwelling suture, ensuring reliable suturing results.

[0069] It should be noted that the above examples are merely one specific embodiment of the present invention. Obviously, the present invention is not limited to the above embodiments and many variations are possible. In short, all variations that can be directly derived or conceived by those skilled in the art from the content disclosed in this invention should be considered within the scope of protection of this invention.

Claims

1. A reusable puncture suture device with needle protection, characterized in that, The device includes a puncture cannula (1), a puncture outer shell cover (5), a puncture outer shell (6), and a puncture suture core. The puncture outer shell cover (5) is provided with a buckle (51). The puncture cannula (1) is detachably and fixedly connected to the puncture suture core through the buckle (51). The puncture outer shell cover (5) is detachably connected to the puncture outer shell (6). The puncture suture core includes a handle, a handle rod (4), a baffle group, a puncture tube (9), a suture push rod (10), a suture push needle (12), a push-pull rod (13), a guide connector (14), a side wing (15), a needle tip baffle (16), a puncture cone rod (17), and a spring (18). The puncture cannula (1) is fitted onto the puncture tube (9). The handle is fixedly connected to the handle rod (4). The baffle group is installed... The baffle assembly is installed inside the puncture casing (6). It is slidably connected to the handle rod (4) and can be fixedly connected. The baffle assembly is fixedly connected to the push-pull rod. The guide connector (14) is fixed inside the puncture tube (9). The push-pull rod (13) passes through the guide connector (14) and is rotatably connected to the side wing (15). The handle rod (4) is slidably connected to the push rod (10) and can be fixedly connected by rotation. The push rod (10) is fixedly connected to the push needle (12). The guide connector (14) has guide grooves (141) on both sides. The side wing (15) has an opening (151). The needle tip baffle (16) has an insertion hole (161). The push needle (12) passes through the guide groove (161). 41) It is slidably engaged with the guide groove (141). The push needle (12) can move downward in a direction away from the guide groove (141) and pass through the opening (151) and the insertion hole (161) in sequence during the movement. The guide groove (141), the opening (151) and the insertion hole (161) are coaxially arranged to form a guide channel for the push needle (12) to slide through. One end of the spring (18) is fixedly connected to the side wing (15), and the other end of the spring (18) is fixedly connected to one end of the needle tip baffle. One end of the needle tip baffle is rotatably connected to the side wing (15), and the other end of the needle tip baffle is a free end. An axial limiting structure (61) is provided on the inner wall of the puncture shell (6). The baffle assembly is provided with a mating part (88) adapted to the axial limiting structure (61). When the baffle assembly rotates relative to the puncture shell (6) to the position where the mating part (88) is aligned with the axial limiting structure (61), the axial limiting structure (61) abuts against the mating part (88), thereby restricting the baffle assembly from moving downward along the axial direction. The puncture cone (17) is fixedly connected to the guide connector (14). The push needle (12) is provided with a pre-set groove (121) for binding the suture. The side wing (15) is provided with a hanging groove (152). When the push needle (12) moves upward along the direction close to the guide groove (141), the suture pre-placed in the pre-set groove can be hooked by the hanging groove (152).Furthermore, the guide groove (141) guides and limits the movement of the suture along a preset path, ultimately positioning and limiting the suture within the hanging groove (152).

2. The reusable puncture suture device with needle protection according to claim 1, characterized in that, The grip includes a handle cap (2) and a handle cap (3), and the handle cap (2) is fixedly connected to the handle rod (4) through the handle cap (3).

3. The reusable puncture suture device with needle protection according to claim 1, characterized in that, The baffle assembly includes an upper baffle (7) and a lower baffle (8). The upper baffle (7) and the lower baffle (8) are sequentially sleeved on the handle rod (4) and the push-pull rod (13). The upper baffle (7) is fixedly connected to the handle rod (4). Both the upper baffle (7) and the lower baffle (8) are fixedly connected to the push-pull rod (13). The bottom of the lower baffle (8) is provided with a groove (81). The upper and lower sides of the handle rod (4) are provided with protrusions (43) that are adapted to the groove (81). When the handle rod (4) moves along the sliding direction to the corresponding position of the groove (81), the protrusions (43) are adapted to and cooperate with the groove (81).

4. The reusable puncture suture device with needle protection according to claim 3, characterized in that, The mating part (88) is located on the lower baffle (8), and the axial limiting structure (61) is provided with a ball (611). When the lower baffle (8) rotates relative to the piercing shell (6) to the position where the mating part (88) and the ball (611) are aligned, the axial limiting structure (61) abuts against the mating part (88), thereby restricting the lower baffle (8) from moving downward along the axial direction.

5. A reusable puncture suture device with needle protection according to claim 1, characterized in that, It also includes a positioning block (11), which is fixed inside the puncture tube (9). The positioning block (11) is inserted into the push rod (10), which is fixedly connected to the push needle (12). The push rod (13) passes through the push rod (10).

6. A reusable puncture suture device with needle protection according to claim 1, characterized in that, The push rod (10), push needle (12), push-pull rod (13), and puncture cone (17) are all located inside the puncture tube (9). The tip of the puncture cone (17) extends out of the bottom of the puncture tube (9) to achieve the puncture guidance function.

7. A reusable puncture suture device with needle protection according to claim 1, characterized in that, The number of push pins (12) is two.

8. A reusable puncture suture device with needle protection according to claim 7, characterized in that, The two push pins (12) are intersected and pass through the guide groove (141), and each push pin (12) slides in cooperation with the guide groove (141).

9. A reusable puncture suture device with needle protection according to claim 1, characterized in that, The puncture shell cover (5) is located on the outside of the puncture shell (6).

10. A reusable puncture suture device with needle protection according to claim 1, characterized in that, The connection between the handle rod (4) and the push rod (10) is specifically as follows: the handle rod (4) and the push rod (10) are slidably engaged, and the handle rod (4) can rotate relative to the push rod (10). The top of the push rod (10) is provided with a slot (101) and a boss (102). The handle rod (4) is provided with a hook groove (41) and a locking part (42). The boss (102) and the hook groove (41) are adapted to each other. When the handle rod (4) slides to the top position of the push rod (10), rotating the handle rod (4) can make the locking part (42) engage with the slot (101), thereby fixing the handle rod (4) and the push rod (10) in a fixed connection.

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