Endoscopic suturing device and endoscopic surgical system

Abstract

The application relates to an endoscope suturing device and an endoscope surgery system. The endoscope suturing device comprises a support for being mounted at the distal end of an endoscope, a puncture needle mounting rack arranged on the support in a rotatable manner around a first axis, a puncture needle assembly comprising a puncture needle and a suture connected with the puncture needle, the puncture needle being connected to the puncture needle mounting rack, and a driving assembly connected with the puncture needle mounting rack, the driving assembly being used for driving the puncture needle mounting rack to rotate around the first axis, so that the puncture needle mounting rack drives the puncture needle to move along a circular motion track. The endoscope suturing device in the application can realize continuous suturing by controlling the puncture needle mounting rack to continuously rotate and drive the puncture needle to continuously move along the circular motion track, and the puncture needle does not need to be connected back and forth. Therefore, the problem that the suturing process is complicated can be solved, and the suturing time can be shortened.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to an endoscopic suturing device and an endoscopic surgical system. Background Technology

[0002] Endoscopic surgery has seen rapid development in recent years. Conventional surgeries often require large external incisions to expose internal organs or assemblies requiring repair; in contrast, endoscopic surgery can be performed with minimal trauma. With the advancement of endoscopic technology, endoscopic surgery has also been applied in weight management. Currently, bariatric surgery has proven to be the most effective method for obesity management; however, its long operation time, high incidence of complications or adverse events, and long postoperative recovery time make it unacceptable for most obese patients. Endoscopic surgery, on the other hand, minimizes trauma and shortens operation and recovery time, making it more patient-friendly.

[0003] Suturing is an important procedure in endoscopic surgery. Endoscopic suturing devices in related technologies require repeated needle insertion and removal during suturing, making the process cumbersome and resulting in a longer suturing time. Summary of the Invention

[0004] Therefore, it is necessary to provide an endoscopic suturing device and an endoscopic surgical system to improve the problem of long suturing time in endoscopic surgery.

[0005] An embodiment of the first aspect of this application provides an endoscopic suturing device, comprising: a support for mounting at the distal end of an endoscope; a puncture needle mounting bracket disposed on the support in a manner rotatable about a first axis; a puncture needle assembly including a puncture needle and a suture connected to the puncture needle, the puncture needle being connected to the puncture needle mounting bracket; and a drive assembly connected to the puncture needle mounting bracket, the drive assembly being used to drive the puncture needle mounting bracket to rotate about the first axis, so that the puncture needle mounting bracket drives the puncture needle to move along a circular motion trajectory.

[0006] The endoscopic suturing device in this embodiment of the application includes a puncture needle mounting bracket rotatably mounted on a support, a puncture needle detachably connected to the puncture needle mounting bracket, and a drive assembly connected to the puncture needle mounting bracket to drive the bracket to rotate around the first axis. This allows the puncture needle to move along a circular motion trajectory. When the endoscopic suturing device is used for suturing during surgery, the drive assembly controls the continuous rotation of the puncture needle mounting bracket, driving the puncture needle to continuously move along a circular motion trajectory, thus achieving continuous suturing without the need for repeated needle reconnection. This improves the cumbersome suturing process and shortens the suturing time. It is understood that this also helps to shorten the overall time of endoscopic surgery.

[0007] In some embodiments, the puncture needle mounting bracket has an arc-shaped structure, and a needle receiving component is provided at one end of the puncture needle mounting bracket, wherein the puncture needle is detachably connected to the needle receiving component.

[0008] In some embodiments, the outer side of the arc-shaped structure is provided with meshing teeth distributed circumferentially; the driving assembly includes a first operating lever and a transmission gear set, the transmission gear set is disposed on the support, the first operating lever is connected to the transmission gear set, and the transmission gear set meshes with the meshing teeth; when the first operating lever rotates about its own axis, it can drive the puncture needle mounting bracket to rotate about the first axis through the transmission gear set.

[0009] In some embodiments, the transmission gear set includes: a first bevel gear connected to one end of the first operating lever; a second bevel gear meshing with the first bevel gear; a driving gear fixedly connected to and coaxially arranged with the second bevel gear; a first transmission gear and a second transmission gear, both meshing with the driving gear; a third transmission gear and a fourth transmission gear, the third transmission gear fixedly connected to and coaxially arranged with the first transmission gear, the fourth transmission gear fixedly connected to and coaxially arranged with the second transmission gear, both meshing with the meshing teeth, and the third transmission gear and the fourth transmission gear located on both sides of the puncture needle mounting bracket.

[0010] In some embodiments, the puncture needle includes a puncture needle body and a sleeve connected to the puncture needle body, the suture is connected to the sleeve, and the sleeve is used to fit the needle fitting.

[0011] In some embodiments, the puncture needle is provided with an annular needle retrieval groove; the endoscopic suturing device further includes a needle retrieval assembly, the needle retrieval assembly including a second operating rod, one end of the second operating rod being provided with a first clamping arm and a second clamping arm, a gap being provided between the first clamping arm and the second clamping arm, the first clamping arm and the second clamping arm jointly defining a receiving cavity for accommodating a portion of the puncture needle; when the portion of the puncture needle is in the receiving cavity, the ends of the first clamping arm and the ends of the second clamping arm can engage with the needle retrieval groove.

[0012] In some embodiments, the needle retrieval assembly further includes a sleeve fitted onto the second operating lever, the sleeve being configured to move relative to the second operating lever along its length direction to drive the first clamping arm and the second clamping arm to move closer to each other.

[0013] In some embodiments, a first through hole is provided on the support for the needle extraction assembly to pass through.

[0014] In some embodiments, the endoscopic suturing device further includes a gripping assembly, which includes a third operating lever and a gripping portion disposed at one end of the third operating lever, and a second through hole is provided on the support for the gripping assembly to pass through.

[0015] In some embodiments, the suture is configured to pass through a channel of the endoscope; the endoscopic suturing device further includes a ligator configured to pass through the channel, the ligator comprising: a suture-cutting tube having a first suture-cutting opening on its sidewall; a suture-cutting loop slidably disposed inside the suture-cutting tube, the suture-cutting loop having a second suture-cutting opening on its sidewall for engaging with the first suture-cutting opening to cut the suture; a suture-cutting loop buckle configured to engage with the suture-cutting loop; and a fourth operating lever connected to the suture-cutting loop buckle.

[0016] In some embodiments, the ligator further includes a ligation head and a ligation sleeve. The outer wall of the ligation sleeve is provided with a stepped portion. A portion of the structure of the ligation sleeve is disposed inside the suture cutting tube, and the stepped portion abuts against the distal end of the suture cutting tube. The suture cutting loop is sleeved on the portion of the ligation sleeve located in the suture cutting tube. The ligation head is connected to the suture cutting loop. The ligation head is configured to be able to separate from the suture cutting loop under external force. The ligation head is used to cooperate with the ligation sleeve to clamp the suture.

[0017] An embodiment of the second aspect of this application provides an endoscopic surgical system, including an endoscope and an endoscopic suturing device as described in any of the above embodiments.

[0018] The endoscopic surgical system in this embodiment of the application has a puncture needle mounting bracket in its endoscopic suturing device that is rotatably mounted on a support. The puncture needle is detachably connected to the puncture needle mounting bracket, and a drive assembly is connected to the puncture needle mounting bracket to drive the bracket to rotate around the first axis. This allows the puncture needle to move along a circular motion trajectory. When the endoscopic suturing device is used for suturing during surgery, the drive assembly controls the continuous rotation of the puncture needle mounting bracket, driving the puncture needle to move continuously along a circular motion trajectory, thus achieving continuous suturing without the need for repeated needle reconnection. This improves the cumbersome suturing process and shortens the suturing time. It is understood that this also helps to shorten the overall time of endoscopic surgery. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an endoscopic surgical system according to one embodiment of this application;

[0020] Figure 2 This is a schematic diagram of the endoscopic suturing device in one embodiment of the present application (the needle retrieval assembly and the grasping assembly are omitted);

[0021] Figure 3 This is a schematic diagram showing the connection relationship between the puncture needle mounting bracket and the puncture needle assembly in one embodiment of this application;

[0022] Figure 4 This is a schematic diagram of the endoscopic surgical system in one embodiment of this application during suturing (the puncture needle has not yet penetrated the suturing site);

[0023] Figure 5 This is a schematic diagram of the endoscopic surgical system in one embodiment of this application during suturing (the puncture needle has penetrated the suturing site);

[0024] Figure 6 This is a schematic diagram of the endoscopic surgical system in one embodiment of this application during suturing (the puncture needle completes the final suturing);

[0025] Figure 7 This is a schematic diagram of the endoscopic suturing device in one embodiment of the present application from another perspective (the needle retrieval assembly and the grasping assembly are omitted);

[0026] Figure 8 This is a schematic diagram of the puncture needle assembly in one embodiment of this application;

[0027] Figure 9 This is a schematic diagram of the needle-retrieving assembly in one embodiment of this application;

[0028] Figure 10This is a schematic diagram of the structure of the second operating lever in one embodiment of this application;

[0029] Figure 11 This is a schematic diagram of the structure of the grasping component in one embodiment of this application;

[0030] Figure 12 This is a schematic diagram of a support in one embodiment of this application;

[0031] Figure 13 This is a schematic diagram of an endoscopic surgical system in one embodiment of this application performing a needle retrieval operation;

[0032] Figure 14 This is a schematic diagram of the ligator in one embodiment of this application (when the suture is pulled by a guide line);

[0033] Figure 15 This is a schematic diagram of the ligator in one embodiment of the present application (when the suture is inserted into the first and second suture cuts). Detailed Implementation

[0034] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0035] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0040] like Figures 1 to 3 As shown, an embodiment of the first aspect of this application provides an endoscopic suturing device 10, which includes a support 100, a puncture needle mounting bracket 200, a puncture needle assembly 300, and a drive assembly 400. Specifically, the support 100 is used to mount on the distal end of an endoscope 20. The puncture needle mounting bracket 200 is disposed on the support 100 in a manner rotatable about a first axis. The puncture needle assembly 300 includes a puncture needle 310 and a suture 320 connected to the puncture needle 310. The puncture needle 310 is connected to the puncture needle mounting bracket 200. The drive assembly 400 is connected to the puncture needle mounting bracket 200 and is used to drive the puncture needle mounting bracket 200 to rotate about the first axis, so that the puncture needle mounting bracket 200 drives the puncture needle 310 to move along a circular motion trajectory.

[0041] The distal end of the endoscope 20 refers to the end of the endoscope 20 that is furthest from the operator, while the proximal end of the endoscope 20 that is closest to the operator can be referred to as the proximal end.

[0042] Please refer to Figures 4 to 6 In the endoscopic suturing device 10 of this application embodiment, the puncture needle mounting frame 200 is rotatably mounted on the support 100 about a first axis. The puncture needle 310 is detachably connected to the puncture needle mounting frame 200. A drive assembly 400 is connected to the puncture needle mounting frame 200 and drives it to rotate about the first axis. This allows the puncture needle 310 to move along a circular motion trajectory. When the endoscopic suturing device 10 is used for suturing during surgery, the drive assembly 400 controls the continuous rotation of the puncture needle mounting frame 200 to drive the puncture needle 310 to move continuously along a circular motion trajectory, thus achieving continuous suturing without the need for repeated needle reconnection. This improves the cumbersome operation of the suturing process and shortens the suturing time. It is understood that this also helps to shorten the total time of the endoscopic surgery 20.

[0043] In some embodiments, such as Figure 1 , Figure 3 As shown, the puncture needle mounting bracket 200 has an arc-shaped structure. A needle receiving component 210 is provided at one end of the puncture needle mounting bracket 200, and the puncture needle 310 is detachably connected to the needle receiving component 210. In this embodiment, the puncture needle mounting bracket 200 has an arc-shaped structure, and the center of the arc-shaped structure is the rotation center of the puncture needle mounting bracket 200. That is, the first axis passes through the center of the arc-shaped structure, thus facilitating the control of the movement trajectory of the puncture needle 310. Furthermore, the needle receiving component 210 is provided at one end of the puncture needle mounting bracket 200, and the puncture needle 310 is detachably connected to the needle receiving component 210. Therefore, the puncture needle 310 can be easily installed or removed from the puncture needle mounting bracket 200 according to usage needs.

[0044] In some embodiments, such as Figure 2 , Figure 3 and Figure 7As shown, the outer side of the arc-shaped structure is provided with circumferentially distributed meshing teeth 220. The drive assembly 400 includes a first operating lever 410 and a transmission gear set 420. The transmission gear set 420 is disposed on the support 100. The first operating lever 410 is connected to the transmission gear set 420, and the transmission gear set 420 meshes with the meshing teeth 220. When the first operating lever 410 rotates around its own axis, it can drive the puncture needle mounting frame 200 to rotate around the first axis through the transmission gear set 420. During the suturing process, the operator can rotate the first operating lever 410. Since the first operating lever 410 is connected to the transmission gear set 420, and the transmission gear set 420 meshes with the meshing teeth 220 on the puncture needle mounting frame 200, when the first operating lever 410 rotates, it drives the puncture needle mounting frame 200 to rotate around the first axis through the transmission gear set 420, thereby causing the puncture needle mounting frame 200 to move along a circular motion trajectory to perform suturing. Therefore, it can be seen that when performing suturing, the operator only needs to rotate the first operating lever 410, which is simple to operate, helps to shorten the suturing time and improve suturing efficiency.

[0045] In some embodiments, the transmission gear set 420 includes a first bevel gear 421, a second bevel gear 422, a drive gear 423, a first transmission gear 424, a second transmission gear 425, a third transmission gear 426, and a fourth transmission gear 427. The first bevel gear 421 is connected to one end of the first operating lever 410. The second bevel gear 422 meshes with the first bevel gear 421. The drive gear 423 is fixedly connected to and coaxially arranged with the second bevel gear 422. The first transmission gear 424 and the second transmission gear 425 both mesh with the drive gear 423. The third transmission gear 426 is fixedly connected to and coaxially arranged with the first transmission gear 424. The fourth transmission gear 427 is fixedly connected to and coaxially arranged with the second transmission gear 425. Both the third transmission gear 426 and the fourth transmission gear 427 mesh with the meshing teeth 220. The third transmission gear 426 and the fourth transmission gear 427 are located on both sides of the puncture needle mounting bracket 200.

[0046] When the operator rotates the first operating lever 410, the first operating lever 410 drives the second bevel gear 422 to rotate via the first bevel gear 421. The drive gear 423 rotates synchronously with the second bevel gear 422. When the drive gear 423 rotates, it drives the first transmission gear 424 and the second transmission gear 425 to rotate. The third transmission gear 426 rotates synchronously with the first transmission gear 424, and the fourth transmission gear 427 rotates synchronously with the second transmission gear 425. The third transmission gear 426 and the fourth transmission gear 427 further drive the puncture needle mounting bracket 200 to rotate. Thus, by rotating the first operating lever 410, the puncture needle mounting bracket 200 can be driven to rotate. Furthermore, since the puncture needle mounting bracket 200 has an arc-shaped structure, it may disengage from the third transmission gear 426 or the fourth transmission gear 427 during its rotation. Therefore, this embodiment of the application provides two transmission gears that mesh with the puncture needle mounting bracket 200, namely the third transmission gear 426 and the fourth transmission gear 427, and positions the third transmission gear 426 and the fourth transmission gear 427 on both sides of the puncture needle mounting bracket 200. In this way, when the puncture needle mounting bracket 200 disengages from one of the third transmission gear 426 and the fourth transmission gear 427 during rotation, the other of the third transmission gear 426 and the fourth transmission gear 427 can still maintain a meshing relationship with the puncture needle mounting bracket 200, so as to drive the puncture needle mounting bracket 200 to continue rotating.

[0047] In some embodiments, such as Figure 3 , Figure 8 As shown, the puncture needle 310 includes a puncture needle body 311 and a sleeve 312 connected to the puncture needle body 311. The suture 320 is connected to the sleeve 312, and the sleeve 312 is used to attach the needle connector 210. By connecting the sleeve 312 to the needle connector 210, a detachable connection between the puncture needle 310 and the needle connector 210 can be achieved. Furthermore, the installation and disassembly processes of the puncture needle 310 are very convenient and easy to operate.

[0048] In some embodiments, such as Figure 3 , Figure 8 , Figure 9 , Figure 10 as well as Figure 13As shown, the puncture needle 310 is provided with an annular needle retrieval groove 313. The endoscopic suturing device 10 also includes a needle retrieval assembly 500, which includes a second operating lever 510. One end of the second operating lever 510 is provided with a first clamping arm 511 and a second clamping arm 512. There is a gap between the first clamping arm 511 and the second clamping arm 512. The first clamping arm 511 and the second clamping arm 512 together define a receiving cavity 513 for accommodating a portion of the puncture needle 310. When a portion of the puncture needle 310 is in the receiving cavity 513, the ends of the first clamping arm 511 and the second clamping arm 512 can engage with the needle retrieval groove 313.

[0049] In related technologies, after suturing is completed, the suture 320 is usually tightened and then knotted. This increases the complexity of the operation. In this embodiment, after the final suturing is completed using the puncture needle 310 and suture 320, the puncture needle 310 can be removed using the needle removal assembly 500. The removed puncture needle 310 remains at the suture site 2, acting like a "thread knot" to prevent the suture 320 from falling off at the suture site 2. Therefore, the knotting step of the suture 320 can be omitted, simplifying the operation. Specifically, one end of the second operating lever 510 in the needle retrieval assembly 500 is provided with a first clamping arm 511 and a second clamping arm 512. The first clamping arm 511 and the second clamping arm 512 can clamp a portion of the puncture needle 310, placing a portion of the puncture needle 310 within the receiving cavity 513 defined by the first clamping arm 511 and the second clamping arm 512. At this time, the ends of the first clamping arm 511 and the second clamping arm 512 engage with the needle retrieval groove 313 on the puncture needle 310. Then, pulling the second operating lever 510 will remove the puncture needle 310 from the needle receiving member 210. The removed puncture needle 310 can remain at the suture site 2.

[0050] Furthermore, the puncture needle 310 can be made of titanium or titanium alloy, which has excellent biocompatibility and will not cause allergic or rejection reactions when left in the human body, and can integrate well with human tissue.

[0051] In some embodiments, the needle retrieval assembly 500 further includes a sleeve 520 sleeved on the second operating lever 510. The sleeve 520 is configured to move relative to the second operating lever 510 along its length to drive the first clamping arm 511 and the second clamping arm 512 closer together. In this embodiment, the first clamping arm 511 and the second clamping arm 512 are naturally positioned far apart from each other, allowing them to open naturally. This allows a portion of the puncture needle 310 to enter the receiving cavity 513 more easily. Subsequently, the sleeve 520 can be moved along the second operating lever 510 towards the puncture needle 310. Under the constraint of the sleeve 520, the first clamping arm 511 and the second clamping arm 512 move closer together, thereby confining a portion of the puncture needle 310 within the receiving cavity 513, and engaging the ends of the first clamping arm 511 and the second clamping arm 512 with the needle retrieval groove 313 on the puncture needle 310. In this state, the second operating lever 510 can be pulled to disengage the puncture needle 310 from the needle removal device. After removing the puncture needle 310, the cannula 520 can be moved again, causing the sleeve 312 to move away from the puncture needle 310. The first clamping arm 511 and the second clamping arm 512, which are freed from the constraint of the cannula 520, return to a state of being far apart from each other. At this time, the puncture needle 310 can leave the receiving cavity 513 and fall at the suture site 2.

[0052] In some embodiments, such as Figure 12 As shown, a first through hole 110 is provided on the support 100, which is used for the needle retrieval assembly 500 to pass through. This allows the needle retrieval assembly 500 to pass through the first through hole 110 on the support 100 to reach the location of the puncture needle 310, so as to facilitate the needle retrieval operation.

[0053] In some embodiments, such as Figure 1 , Figure 11 As shown, the endoscopic suturing device 10 also includes a grasping assembly 600, which includes a third operating lever 610 and a grasping part 620 disposed at one end of the third operating lever 610. A second through hole 120 is provided on the support 100 for the grasping assembly 600 to pass through. The grasping assembly 600 is used to grasp the part to be sutured and pull it closer, so that the part to be sutured is on the movement trajectory of the puncture needle 310, so as to facilitate suturing during the movement of the puncture needle 310. In addition, during the suturing process, the grasping assembly 600 can also fix the part to be sutured, preventing the part to be sutured from shifting position during the suturing process.

[0054] In some embodiments, such as Figure 1 , Figure 14 and Figure 15As shown, the suture 320 is configured to pass through the channel 21 of the endoscope 20. The endoscopic suturing device 10 also includes a ligator 700, which is configured to pass through the channel 21 of the endoscope 20. The ligator 700 includes a suture cutting tube 730, a suture cutting ring 740, a suture cutting ring buckle 750, and a fourth operating lever 760. A first suture cutting opening 731 is provided on the side wall of the suture cutting tube 730. The suture cutting ring 740 is slidably disposed inside the suture cutting tube 730. A second suture cutting opening 741 is provided on the side wall of the suture cutting ring 740. The second suture cutting opening 741 is used to cooperate with the first suture cutting opening 731 to cut the suture 320. The suture cutting ring buckle 750 is configured to cooperate with the suture cutting ring 740. The fourth operating lever 760 is connected to the suture cutting ring buckle 750. In this embodiment, one of the functions of the ligator 700 is to cut the suture 320. Specifically, when cutting, the fourth operating lever 760 can be pulled, causing the fourth operating lever 760 to move the suture cutting ring 750 towards the proximal end of the endoscope 20. After the suture cutting ring 750 moves to the position of the suture cutting ring 740, it engages with the suture cutting ring 740 and further drives the suture cutting ring 740 to move. When the suture cutting ring 740 moves to the point where the first suture cutting opening 731 and the second suture cutting opening 741 are closed, the suture 320 can be cut.

[0055] Specifically, the guide line 800 can be used to pull the suture 320 into the suture cutting ring 740 and the suture cutting tube 730, and the suture 320 can be passed through the first suture cutting hole 731 and the second suture cutting hole 741, so that the suture 320 can be cut by the ligator 700.

[0056] In some embodiments, the ligator 700 further includes a ligation head 710 and a ligation sleeve 720. The outer wall of the ligation sleeve 720 is provided with a stepped portion 721. A portion of the structure of the ligation sleeve 720 is disposed within the suture cutting tube 730, and the stepped portion 721 abuts against the distal end of the suture cutting tube 730. A suture cutting loop 740 is sleeved on the portion of the ligation sleeve 720 located in the suture cutting tube 730. The ligation head 710 is connected to the suture cutting loop 750. The ligation head 710 is configured to separate from the suture cutting loop 750 under external force. The ligation head 710 is used to cooperate with the ligation sleeve 720 to clamp the suture 320. In this embodiment, in addition to cutting the suture 320, the ligator 700 also has the function of preventing the suture 320 from falling off from the suture site 2. Specifically, before cutting the suture 320, the suture 320 is first tightened to compress all sutured areas 2 together. Then, the fourth operating lever 760 is pulled, causing it to move the suture-cutting ring 750 towards the proximal end of the endoscope 20. The fourth operating lever 760, through the suture-cutting ring 750, moves the ligation head 710, thereby pulling the ligation head 710 into the ligation sleeve 720. At this point, the ligation head 710 and the ligation sleeve 720 together clamp the suture 320. The fourth operating lever 760 is then pulled further, causing the suture-cutting ring 750 to move. After the suture-cutting ring 750 reaches the position of the suture-cutting ring 740, it engages with the suture-cutting ring 740 and further moves the suture-cutting ring 740. Because the stepped portion 721 on the outer wall of the ligation sleeve 720 abuts against the distal end of the suture cutting tube 730, the suture cutting ring 740 separates from the ligation sleeve 720. Simultaneously, the ligation head 710 is fixed together with the ligation sleeve 720 and separates from the suture cutting ring 750. The suture cutting ring 740 continues to move and can cut the suture 320, while the ligation head 710 and ligation sleeve 720 detach from the suture cutting tube 730 and fall at the suture site 2. At this time, the ligation head 710 and ligation sleeve 720 also function similarly to a "thread loop," preventing the suture 320 from falling off at the suture site 2.

[0057] Specifically, during the process of using the guide line 800 to pull the suture 320 into the suture cutting ring 740 and the suture cutting tube 730, the suture 320 also needs to pass through the ligation sleeve 720 so that the ligation head 710 and the ligation sleeve 720 can clamp the suture 320.

[0058] Furthermore, the materials of the ligation head 710 and the ligation sleeve 720 can be selected from materials with good biocompatibility, such as biocompatible metals, ceramics, or artificial polymers.

[0059] An embodiment of the second aspect of this application provides an endoscopic surgical system 1, which includes an endoscope 20 and an endoscopic suturing device 10 as described in any of the above embodiments.

[0060] In the endoscopic surgical system 1 of this application embodiment, the puncture needle mounting bracket 200 of the endoscopic suturing device 10 is rotatably mounted on the support 100 about a first axis. The puncture needle 310 is detachably connected to the puncture needle mounting bracket 200, and the drive assembly 400 is connected to the puncture needle mounting bracket 200 to drive the puncture needle mounting bracket 200 to rotate about the first axis. This allows the puncture needle 310 to move along a circular motion trajectory. When the endoscopic suturing device 10 is used for suturing during surgery, the drive assembly 400 controls the continuous rotation of the puncture needle mounting bracket 200 to drive the puncture needle 310 to move continuously along a circular motion trajectory, thus achieving continuous suturing without the need for repeated needle reconnection. This improves the cumbersome operation of the suturing process and shortens the suturing time. It is understood that this also helps to shorten the total time of the endoscopic surgery 20.

[0061] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An endoscopic suturing device, characterized in that, include: Support, used for mounting at the distal end of the endoscope; A puncture needle mounting bracket, wherein the puncture needle mounting bracket is disposed on the support in a manner that allows it to rotatably about a first axis; A puncture needle assembly, the puncture needle assembly including a puncture needle and a suture connected to the puncture needle, the puncture needle being connected to a puncture needle mounting bracket; A drive assembly is connected to the puncture needle mounting bracket, and the drive assembly is used to drive the puncture needle mounting bracket to rotate around the first axis so that the puncture needle mounting bracket drives the puncture needle to move along a circular motion trajectory; the suture is configured as a channel passing through the endoscope; The endoscopic suturing device further includes a ligator configured to pass through the channel, the ligator comprising: A wire-cutting tube, wherein a first wire-cutting opening is provided on the side wall of the wire-cutting tube; A thread-cutting ring is slidably disposed inside the thread-cutting tube. A second thread-cutting opening is provided on the side wall of the thread-cutting ring. The second thread-cutting opening is used to cooperate with the first thread-cutting opening to cut the suture. A wire cutter loop, wherein the wire cutter loop is configured to engage with the wire cutter loop; The fourth operating lever is connected to the wire-cutting ring. The ligator further includes a ligation head and a ligation sleeve. The outer wall of the ligation sleeve is provided with a stepped portion. A portion of the structure of the ligation sleeve is disposed inside the suture cutting tube, and the stepped portion abuts against the distal end of the suture cutting tube. The suture cutting loop is sleeved on the portion of the ligation sleeve located in the suture cutting tube. The ligation head is connected to the suture cutting loop. The ligation head is configured to be able to separate from the suture cutting loop under external force. The ligation head is used to cooperate with the ligation sleeve to clamp the suture.

2. The endoscopic suturing device according to claim 1, characterized in that, The puncture needle mounting bracket has an arc-shaped structure, and a needle receiving component is provided at one end of the puncture needle mounting bracket. The puncture needle is detachably connected to the needle receiving component.

3. The endoscopic suturing device according to claim 2, characterized in that, The outer side of the arc-shaped structure is provided with meshing teeth distributed circumferentially; The drive assembly includes a first operating lever and a transmission gear set. The transmission gear set is disposed on the support. The first operating lever is connected to the transmission gear set, and the transmission gear set meshes with the meshing teeth. When the first operating lever rotates around its own axis, it can drive the puncture needle mounting bracket to rotate around the first axis through the transmission gear set.

4. The endoscopic suturing device according to claim 3, characterized in that, The transmission gear set includes: A first bevel gear is connected to one end of the first operating lever; The second bevel gear meshes with the first bevel gear; A drive gear, which is fixedly connected to and coaxially arranged with the second bevel gear; A first transmission gear and a second transmission gear, both of which mesh with the driving gear; The third transmission gear and the fourth transmission gear are fixedly connected to the first transmission gear and coaxially arranged. The fourth transmission gear is fixedly connected to the second transmission gear and coaxially arranged. Both the third transmission gear and the fourth transmission gear mesh with the meshing teeth. The third transmission gear and the fourth transmission gear are located on both sides of the puncture needle mounting bracket.

5. The endoscopic suturing device according to claim 2, characterized in that, The puncture needle includes a puncture needle body and a sleeve connected to the puncture needle body. The suture is connected to the sleeve, and the sleeve is used to attach the needle fitting.

6. The endoscopic suturing device according to claim 1, characterized in that, The puncture needle is provided with an annular needle extraction groove; The endoscopic suturing device further includes a needle retrieval assembly, which includes a second operating lever. One end of the second operating lever is provided with a first clamping arm and a second clamping arm. There is a gap between the first clamping arm and the second clamping arm. The first clamping arm and the second clamping arm together define a receiving cavity for accommodating a portion of the puncture needle. When the portion of the puncture needle is in the receiving cavity, the ends of the first clamping arm and the ends of the second clamping arm can engage with the needle retrieval slot.

7. The endoscopic suturing device according to claim 6, characterized in that, The needle retrieval assembly further includes a sleeve fitted on the second operating lever, the sleeve being configured to move relative to the second operating lever along the length direction of the second operating lever to drive the first clamping arm and the second clamping arm to move closer to each other; And / or, a first through hole is provided on the support, the first through hole being used to allow the needle-taking assembly to pass through.

8. The endoscopic suturing device according to any one of claims 1 to 7, characterized in that, The endoscopic suturing device further includes a grasping assembly, which includes a third operating lever and a grasping part disposed at one end of the third operating lever. A second through hole is provided on the support for the grasping assembly to pass through.

9. An endoscopic surgical system, characterized in that, Includes an endoscope and an endoscopic suturing device as claimed in any one of claims 1 to 8.

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