Endoscopic purse-string suture device

Abstract

The application discloses a cavity purse string suture device, which comprises a sleeve part, a lower clamp part fixed at the distal end of the sleeve part, an upper clamp part hinged to the distal end of the sleeve part, the upper clamp part and the lower clamp part are divided into left and right two parts, one part is an anastomosis component, and the other part is a purse string suture component, the upper clamp part and the lower clamp part are provided with sliding ways extending from the proximal end to the distal end on the upper and lower sides, a pressing block is arranged between the distal end of the sleeve part and the proximal end of the lower clamp part, the pressing block can move along the sliding way, the proximal end first section and the distal end second section of the upper clamp part and the lower clamp part are connected through a slope, the opening angle and the pressing of the upper clamp part can be controlled when the pressing block moves on the sliding way, a driving rod is arranged in the sleeve part, two purse string needles extending along the direction of the proximal end and the distal end are arranged on one side of the driving rod, and the two purse string needles pass through the clamp teeth when the cutting purse string suture assembly is closed. The application has the advantages of simple structure, convenient operation, easy cutting and suture control.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a laparoscopic purse-string suture device. Background Technology

[0002] Based on the above, a laparoscopic purse-string suture device is described in the prior art. For example... Figure 1 The device includes a cannula assembly 1, an upper clamp 2, and a lower clamp 3. The lower clamp 3 is fixed to the distal end of the cannula assembly 1. The upper clamp 2 is hinged to the distal end of the cannula assembly 1. A cutting blade guide groove extending from the proximal end to the distal end is provided between the upper and lower sides of the lower clamp 3 and the upper clamp 2. The cannula assembly 1 includes a pusher structure and a cutting blade, such as... Figure 2 and Figure 3 Both the upper clamp 2 and the lower clamp 3 are divided into left and right parts by a cutting blade guide groove. One side of the clamp is a stapler component for achieving staple anastomosis, and the other side is a purse-string suture component for achieving purse-string suture. Figure 6 As shown, the anastomosis component includes an anvil located in the upper clamp 2 and an anastomosis cartridge located in the lower clamp 3. For example, the anastomosis cartridge (anastomosis cartridge ejection component) disclosed in CN213156149U includes several anastomosis cartridge ejection holes distributed from far to near on the cartridge anastomosis surface; anastomosis cartridge pusher block 13 is disposed at the lower part of the anastomosis cartridge 11 and is used to push the anastomosis cartridge 11 upward; anastomosis cartridge pusher block 14 is initially disposed at the proximal end of the upper clamp 2 and is moved to the distal end of the upper clamp 2 by a pusher; the contact surface between the anastomosis cartridge pusher block 14 and the anastomosis cartridge pusher block 13 is inclined, so that when the anastomosis cartridge pusher block 14 moves to the distal end, it can push the anastomosis cartridge pusher block 13 upward. The purse-string suture component includes several spaced pincers 21 extending in the proximal direction. Each pincer has a linear groove 31 extending in the proximal direction on the end face of the pincer 21 facing the other side. Two purse-string needles are fixed in parallel on the side of the cutting blade facing the purse-string suture component. The purse-string needles move forward and backward with the cutting blade. The distal end of the purse-string suture is hooked and connected to the distal end of the purse-string needle. The remaining part of the purse-string suture is folded and attached to the side of the purse-string needle. The cutting blade has a top plate and a bottom plate that are parallel to each other on the upper and lower sides of its distal end. The cutting blade guide groove of the upper clamp 2 and the lower clamp 3 has a T-shaped channel that adapts to the distal end of the cutting blade and the top plate or bottom plate. When the cutting blade is pushed to the distal end along the sleeve component, the top plate and bottom plate of the distal end of the cutting blade slide along the cutting blade guide groove of the upper clamp 2 and the lower clamp 3 respectively, thereby driving the upper clamp 2 to close the lower clamp 3. After the lower clamp 3 and the upper clamp 2 are closed, the intestinal tube is clamped between the symmetrical clamp teeth on the lower clamp 3 and the upper clamp 2. The folded intestinal tube is accommodated between the spaced clamp teeth, so that the linear groove 31 in the clamp teeth can be aligned with the purse needle.

[0003] The existing laparoscopic purse-string suture device has the following problems in use: 1. After the lower clamp 3 and upper clamp 2 are closed, they need to be opened again to observe whether the intestinal tube is held flat and completely clamped within the functional area of ​​the purse-string suture component. This needs to be checked repeatedly. Therefore, when the lower clamp 3 and upper clamp 2 are closed, the purse-string needle retracts with the cutting blade, and the purse-string suture hooked on the distal end of the purse-string needle is easy to detach from the hook of the purse-string needle. When performing purse-string suturing, the purse-string needle passes through the intestinal tube between the spaced clamp teeth, but the purse-string suture does not pass through the intestinal tube, resulting in no suturing.

[0004] 2. When the cutting blade moves to the distal ends of the lower clamp 3 and upper clamp 2, the purse-string needle needs to carry the purse-string suture to protrude from the distal ends of the lower clamp 3 and upper clamp 2 so that the two purse-string sutures can be clamped with another surgical forceps, tightened, and knotted to achieve purse-string suturing. Therefore, the distal end of the purse-string needle on the side of the cutting blade needs to be further away from the distal end of the cutting blade than the distal end of the cannula component 1. The relative distance between the distal end of the cutting blade and the distal end of the purse-string needle affects whether the purse-string needle and purse-string suture can successfully penetrate the intestinal tract. If the relative distance is large, when the purse-string needle has been released from the intestinal tract, the top and bottom plates of the distal end of the cutting blade have not yet reduced the angle between the lower clamp 3 and upper clamp 2 to close to 0°, and the intestinal tract has not yet been squeezed between the spaced clamp teeth. This can easily cause the purse-string needle to slip past the upper and lower sides of the intestinal tract and fail to penetrate it, resulting in suturing failure. Summary of the Invention

[0005] The purpose of this invention is to overcome the technical problems that the prior art cannot solve. The technical solution of this invention is as follows: A laparoscopic purse-string suture device includes a cannula component. A lower clamp is fixed at the distal end of the cannula component, and an upper clamp is hinged to the distal end of the cannula component. The anastomosis surfaces of the upper clamp and the lower clamp are divided into anastomosis components for achieving anastomosis staples and purse-string suture components for achieving purse-string suture by a slide extending in the proximal direction. The slide is centrally located on the base plate of the upper clamp and the lower clamp, and the base plate includes a first segment and a second segment that are closer to and farther from the anastomosis surface, respectively. The first segment and the second segment are located at the proximal end and the distal end of the base plate and are connected by a ramp. A drive rod that can slide in the proximal direction is provided inside the cannula component. The distal end of the drive rod is connected to a cutting blade. The cutting blade is initially located on the base plate and the proximal end of the lower clamp. The upper and lower sides of the cutting blade are respectively connected to a top plate located on the upper side of the base plate and a bottom plate located in the slide of the lower clamp. The cutting blade can slide along the slide. The distance between the top plate and the bottom plate is greater than the distance between the first segment of the substrate and the bottom plate, but equal to the distance between the upper side of the second segment of the substrate and the bottom plate, which can limit the opening angle of the upper clamp. Two purse-string needles extending in the proximal direction are provided on the side of the drive rod near the purse-string sewing member. The purse-string needles and the drive rod are respectively provided with a cutting section and a limiting block to limit the distance of mutual sliding. A protruding block is provided at the proximal end of the sleeve component. When the drive rod is set in the initial position, the protruding block prevents the proximal end of the purse-string needle from moving towards the proximal end of the sleeve component, so that the purse-string needle extends into the proximal end of the purse-string sewing member. The distance that the limiting block slides from the proximal end of the cutting section to the distal end of the cutting section is not less than the distance that the proximal end of the top plate of the cutting blade slides from the proximal end of the first segment of the substrate to the proximal end of the second segment. When the limiting block slides to the distal end of the cutting section, the distance between the distal end of the cutting blade and the distal end of the purse-string needle is greater than the distance between the distal end of the slide of the upper clamp and the distal end of the lower clamp and the distal end of the upper clamp and the lower clamp, respectively.

[0006] Advantageously, the protruding block inside the cannula component, when the drive rod is set in the initial position, serves to prevent the proximal end of the purse needle bar from moving towards the proximal end of the cannula component, so that the purse needle tip extends into the proximal end of the purse suture member, and the lower purse needle can be aligned with the purse suture member of the lower clamp.

[0007] Furthermore, before the top end of the cutting blade slides to the second proximal end of the base plate, that is, before the upper and lower jaws are fully closed, the purse-string needle remains stationary relative to the purse-string suture component. Only after the upper and lower jaws are fully closed can the drive rod push the purse-string needle to puncture the tissue to be sutured between the upper and lower jaws. This avoids the situation where the upper and lower jaws are not fully closed, the folds of the tissue to be sutured are not contained and fixed between the spaced jaw teeth, and the linear grooves in the jaw teeth of the upper jaw fail to engage with the purse-string suture component. In response to the issue that after the purse-string needle moves distally, it cannot continuously puncture the tissue to be sutured to form a purse-string suture, it also prevents the purse-string needle from following the drive rod proximally when the top plate of the cutting blade moves from the second proximal end of the base plate to the first end. This prevents the purse-string thread hooked at the distal end of the purse-string needle from dislodging due to relative displacement, thereby enabling the reversible movement of the drive rod to open the upper and lower clamps, adjust and check the overlap thickness of the tissue to be sutured between the upper and lower clamps, and improve the degree to which the upper and lower clamps can be completely closed.

[0008] As the purse-string needle moves distally to perform suturing, and the cutting blade moves distally to the end of the slide, the purse-string needle can pass through the distal ends of the upper and lower clamps so that other surgical instruments can be used to grasp the purse-string suture distal to the needle.

[0009] Furthermore, the purse needle includes a purse needle shaft and a purse needle tip. The purse needle tip is provided at the distal end of the purse needle shaft. The two ends of the purse suture are respectively connected to the proximal ends of the two purse needle tips. The remaining purse thread is folded and attached to the side of the purse needle shaft.

[0010] Furthermore, the purse-string suture component includes a plurality of spaced-apart clamp teeth extending in the proximal direction. Each clamp tooth has a linear groove extending in the proximal direction on the end face of another purse-string suture component. When the upper clamp and the lower clamp are closed, the two purse-string needles are respectively aligned with the linear grooves of the two purse-string suture components and can move in the linear grooves. The needle eye channel located in the proximal direction of the purse-string suture component is formed by the concentric arrangement of each linear groove.

[0011] Furthermore, the cutting blade has a driving end and a cutting edge, the driving end can be embedded in a connecting driving rod, and the cutting edge faces the far end of the slide.

[0012] Furthermore, the grooved section is located near the proximal end of the two purse needle rods. The grooved section is a sliding plane extending in the proximal direction formed by cutting on the purse needle rod. The proximal end of the drive rod is connected to a cutting blade fixing block. The distal end of the cutting blade fixing block facing the purse needle is provided with a limiting block with a needle hole. The needle hole of the limiting block is clearance-fitted with the sliding plane of the purse needle rod. The diameter of the needle hole of the limiting block is smaller than the diameter of the remaining section of the purse needle rod.

[0013] Furthermore, the purse needle bar is a hollow structure, the purse needle tip is a stepped structure, the tail end of the purse needle tip is connected to the purse needle bar and placed inside the purse needle bar, the purse needle bar has a side opening on the side away from the drive rod, the two ends of the purse thread are connected to the purse needle tip, and the remaining part of the purse thread is placed inside the purse needle bar through the side opening.

[0014] Furthermore, the purse needle rod is a solid rod, and the proximal end of the purse needle tip is provided with a tail end hole. The distal end of the purse needle rod is placed in the tail end hole of the purse needle tip. The middle part of the purse needle tip is provided with a through hole through which the purse thread can pass. A purse thread is passed through the through holes of two purse needle tips and then knotted to form a purse thread loop. The remaining part of the purse thread loop is folded and attached to the side of the purse needle rod.

[0015] Furthermore, a groove is cut at the tip of the purse needle, and the two ends of the folded purse thread loop are hooked into the groove of each purse needle, with the remaining part of the purse thread loop folded and attached to the side of the purse needle shaft. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the purse-string sewing device. Figure 2 This is a schematic diagram of the jaw structure; Figure 3 This is a cross-sectional view of the structure of the upper clamp of the present invention when it is open; Figure 4 This is a cross-sectional view of the structure of the present invention when the upper clamp is closed; Figure 5 This is a cross-sectional view of the closed structure of the upper and lower clamps of the present invention without a purse-string needle; Figure 6 A cross-sectional view of the anastomosis component of a purse-string suture device; Figure 7 This is a schematic diagram of the cutting blade structure of the present invention; Figure 8 This is a schematic diagram showing the closure of the upper and lower clamps of the present invention; Figure 9 This is a schematic diagram of the purse-string needle structure of the present invention; Figure 10 This is a schematic diagram of the second embodiment of the purse needle of the present invention; Figure 11 This is a schematic diagram of the third embodiment of the purse needle of the present invention; Figure 12 A schematic diagram illustrating the completed cutting and anastomosis process; Figure 13 This is a schematic diagram of the state when reverting to the starting position. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] like Figure 1 A laparoscopic purse-string suture device and its anastomosis structure include a cannula component 1, an upper clamp 2, and a lower clamp 3. The lower clamp 3 is fixed to the distal end of the cannula component 1. Figures 12-13 The upper clamp 2 is hinged to the distal end of the cannula component 1. The handle assembly controls the opening and closing of the lower clamp 3. There is a slide 4 extending from the proximal end to the distal end between the upper clamp 2 and the lower clamp 3. The left and right sides of the slide 4 of the lower clamp 3 respectively accommodate the anastomosis lower clamp and the purse-string suture component. The left and right sides of the slide 4 of the upper clamp 2 respectively accommodate the anastomosis anvil 22 and the purse-string suture component. The anastomosis staple cartridge and the anastomosis lower clamp cooperate to compress and fix the tissue between them. The two purse-string suture components cooperate to purse-string suture the tissue between them.

[0019] like Figure 3 and Figure 4 As shown, the upper clamp 2 is constructed with the slide 4 centrally located on the upper side of the lower clamp 3, including a first segment 24 at the proximal end and a second segment 23 at the distal end. The first segment 24 and the second segment 23 are connected by a ramp. When the upper clamp 2 and the lower clamp 3 are closed, the distance between the first segment 24 of the upper clamp 2 and the lower clamp 3 is smaller than the distance between the second segment 23 and the lower clamp 3. like Figure 7 As shown, the sleeve component 1 is internally provided with a drive rod 7 that can slide in the proximal direction. The distal end of the drive rod 7 is connected to the cutting blade 5. The cutting blade 5 can be embedded in the slide rails 4 of the upper clamp 2 and the lower clamp 3. The upper and lower sides of the cutting blade 5 are provided with a top plate 53 and a bottom plate 54 that are parallel to each other. The distal end of the drive rod 7 is initially located at the distal end of the sleeve component 1. The top plate 53 and the bottom plate 54 of the cutting blade 5 are initially located at the proximal end of the first segment 24 on the upper side of the substrate and the proximal end of the slide rail 4 of the lower clamp 3, respectively. The upper side of the substrate is spaced apart from the lower side of the top plate 53 of the cutting blade 5, so that when the upper clamp 2 opens relative to the lower clamp 3, the first segment of the substrate of the upper clamp 2 can open at a certain angle relative to the top plate 53 of the cutting blade 5.

[0020] The cutting blade 5 has a driving end 51 that can engage with the driving rod 7 and a cutting edge 52 facing the distal end of the upper clamp 2 and the lower clamp 3. The driving end 51 of the cutting blade 5 is connected to the distal end of the driving rod 7 inside the sleeve component 1. When the driving rod 7 drives the cutting blade 5 to advance to the distal end, the bottom plate 54 and the top plate 53 of the cutting blade 5 slide along the slide 4 of the lower clamp 3 and the upper surface of the second section that is close to the substrate, so that the upper clamp 2 closes the lower clamp 3, clamping the tissue to be sutured and cut (such as the intestine) between the symmetrical clamp teeth 21 on the lower clamp 3 and the upper clamp 2, and the cutting edge 52 cuts off the tissue to be sutured and cut.

[0021] like Figure 5 As shown, the purse sewing component includes a plurality of spaced-apart pincers 21 extending in the proximal direction. Each pincer 21 has a linear groove 31 extending in the proximal direction on the end face of another purse sewing component. The purse needle 8 can move in the linear groove 31.

[0022] like Figure 6 As shown, the anastomosis component includes an anastomosis cartridge located in the lower clamp 3 and an anastomosis anvil 22 located in the upper clamp 2. Similar to CN213156149U, the anastomosis cartridge (anastomosis ejection component) includes several anastomosis ejection holes distributed from far to near on the anastomosis surface of the cartridge; anastomosis pusher block 13 is disposed at the lower part of the anastomosis 11 and is used to push the anastomosis 11 upward; anastomosis pusher block 14 is initially disposed at the proximal end of the lower clamp 3 and is moved to the distal end of the lower clamp 3 by the cutting blade 5; the contact surface between the anastomosis pusher block 14 and the anastomosis pusher block 13 is inclined, so that when the anastomosis pusher block 14 moves to the distal end, it can push the anastomosis pusher block 13 upward.

[0023] Furthermore, such as Figures 8-11 As shown, the drive rod 7 has two purse needle rods 81 extending in the proximal direction on the side near the purse needle sewing component. The distal end of the purse needle rod 81 is provided with a purse needle tip 82. The purse needle rod 81 and the purse needle tip 82 form a purse needle 8. The portion of the purse needle rod 81 near the proximal end is cut to form a sliding plane 84 extending in the proximal direction. The proximal end of the drive rod 7 is connected to a cutting blade fixing block 10. The distal end of the cutting blade fixing block 10 facing the purse needle 8 is provided with a limiting block 9 with a needle hole. The needle hole of the limiting block 9 is clearance-fitted with the sliding plane 84 of the purse needle rod 81. The diameter of the needle hole of the limiting block 9 is smaller than the diameter of the remaining section of the purse needle rod 81. The purse needle rod 81 can slide relative to the limiting block 9 within the length of the groove defined by the sliding plane 84.

[0024] A protruding block is provided at the proximal end of the cannula component 1. When the drive rod 7 is in the initial position, the protruding block is used to prevent the proximal end of the purse-string needle rod 81 from moving towards the proximal end of the cannula component 1, so that the purse-string needle tip 82 can be inserted into the proximal end of the purse-string suture member. The distance that the limiting block 9 slides from the proximal end of the sliding plane 84 to the distal end of the sliding plane 84 is not less than the distance that the proximal end of the top plate 53 of the cutting blade 5 slides from the proximal end of the first segment 24 of the substrate to the proximal end of the second segment 23 of the substrate. Therefore, before the proximal end of the top plate 53 of the cutting blade 5 slides to the proximal end of the second segment 23 of the substrate, that is, before the upper clamp 2 and the lower clamp 3 are completely closed, the purse-string needle 8 is kept stationary relative to the purse-string suture member. Only after the upper clamp 2 and the lower clamp 3 are completely closed can the drive rod 7 push the purse-string needle 8 to puncture the tissue to be sutured between the upper clamp 2 and the lower clamp 3. This avoids the folds of the tissue to be sutured not being fully closed when the upper clamp 2 and the lower clamp 3 are not completely closed. The clamps are fixed between the spaced jaws 21. The linear groove 31 in the jaws 21 of the upper clamp 2 fails to align with the purse needle 8. After the purse needle 8 moves to the distal end, it cannot continuously puncture the tissue to be sutured to form a purse suture. Also, when the top plate 53 of the cutting blade 5 moves from the proximal end of the second segment 23 of the base plate to the first segment 24, it prevents the purse needle 8 from following the drive rod 7 to the proximal end, and prevents the purse thread hooked at the distal end of the purse needle 8 and the purse needle 8 from displacing relative to each other. This allows the reversible drive rod 7 to open the upper clamp 2 and the lower clamp 3, adjust and check the overlap thickness of the tissue to be sutured between the upper clamp 2 and the lower clamp 3, and improve the degree to which the upper clamp 2 and the lower clamp 3 can be completely closed. When the limiting block 9 slides to the distal end of the sliding plane 84, the distance between the distal end of the cutting blade 5 and the distal end of the purse needle 8 is greater than the distance between the distal end of the slide rail 4 on the base plate of the upper clamp 2 and the distal end of the upper clamp 2, or greater than the distance between the distal end of the slide rail 4 of the lower clamp 3 and the distal end of the lower clamp 3. Therefore, the purse needle 8 moves distally to perform suturing. When the cutting blade 5 moves distally to the distal end of the slide rail 4, the purse needle 8 can pass through the distal ends of the upper clamp 2 and the lower clamp 3 so that the purse suture at the distal end of the purse needle 8 can be grasped by other surgical instruments.

[0025] As one embodiment of the present invention, such as Figure 9 As shown, the purse-string needle bar 81 is a hollow structure, and the purse-string needle tip 82 is a stepped structure. The tail end of the purse-string needle tip 82 is connected to the purse-string needle bar 81 and placed inside the purse-string needle bar 81. The purse-string needle bar 81 has a side opening on the side opposite to the drive rod 7. The two ends of the purse-string thread 83 are connected to the purse-string needle tip 82, and the remaining part of the purse-string thread 83 is placed inside the purse-string needle bar 81 through the side opening. After the two purse-string needle tips 82 puncture the tissue, they are pushed to the distal ends of the upper clamp 2 and the lower clamp 3. There is a strand of purse-string thread inside the tissue on each side. Using another surgical forceps, the two ends of the purse-string thread are clamped to remove the purse-string needle tip 82, tightened, and knotted to complete the purse-string suture.

[0026] As another embodiment of the present invention, such as Figure 10As shown, the purse-string needle bar 81 is a solid bar, and the purse-string needle tip 82 has a tail end hole at its proximal end. The distal end of the purse-string needle bar 81 is placed inside the tail end hole of the purse-string needle tip 82, and only the thrust is transmitted between the two. The purse-string needle tip 82 has a through hole in the middle for the purse-string thread 83 to pass through. One purse-string thread 83 is inserted into the through holes of two purse-string needle tips 82 and then tied to form a purse-string loop. The remaining part of the purse-string loop is folded and attached to the side of the purse-string needle bar 81. After the two purse-string needle tips 82 puncture the tissue, they are pushed to the distal ends of the upper clamp 2 and the lower clamp 3. There are two strands of purse-string thread inside the tissue on each side. The two purse-string needle tips 82 are clamped with another surgical forceps to remove the purse-string needle bar 81, tighten and tie a knot to achieve purse-string suturing.

[0027] As another embodiment of the present invention, such as Figure 11 As shown, a notch is cut at the purse-string needle tip 82. The two ends of the purse-string loop after being folded in half are hooked into the notch of each purse-string needle 8. The remaining part of the purse-string loop is folded and attached to the side of the purse-string needle shaft 81. There are two strands of purse-string thread at each purse-string needle 8. After puncturing the tissue, they are pushed to the distal ends of the upper clamp 2 and the lower clamp 3. There are two strands of purse-string thread inside the tissue on each side. The purse-string needle tip 82 is removed by clamping the two ends of the purse-string loop with another surgical forceps, tightened and knotted to achieve purse-string suturing.

[0028] In the initial state, the drive rod 7 is engaged with the cutting blade 5 at the distal end of the cannula component, and does not yet enter the proximal end of the second segment 23 of the upper clamp 2. During use, first, the thoracic esophagus is routinely freed, then the esophageal section to be severed is selected. The upper clamp 2 and lower clamp 3 are in the open state and inserted into the thoracic cavity so that the esophageal lumen is completely placed between the purse-string suture components. The upper clamp 2 and lower clamp 3 are then closed, and the laparoscopic suture device is controlled to perform the following actions: a. Drive rod 7 pushes the drive end 51 of the cutting blade 5 to move distally along slide 4, checking the relative angle and distance between the upper clamp 2 and the lower clamp 3 after clamping the esophagus. If the distance between the upper clamp 2 and the lower clamp 3 is uniform and the upper clamp 2 and the lower clamp 3 are relatively parallel, then continue to push the cutting blade 5 to move distally along slide 4, and the blade end 52 cuts the esophageal tissue; if not, drive rod 7 pulls the cutting blade 5 to move proximally along slide 4, opening the upper clamp 2 and the lower clamp 3, fine-tuning the esophagus, and then drive rod 7 pushes the drive end 51 of the cutting blade 5 to move distally along slide 4 until the distance between the upper clamp 2 and the lower clamp 3 is uniform and the upper clamp 2 and the lower clamp 3 are relatively parallel. b. The drive rod 7 drives the purse needle 8 through the linear groove 31 on the pincer teeth 21 of the purse suture component. At this time, the purse needle 82 drives the purse suture thread 83 through the esophageal serosal layer to complete the purse suture.

[0029] During purse-string suture, the opening and closing angles of the lower clamp 3 and the upper clamp 2 can be controlled by the top and bottom plates of the cutting blade 5. When the purse-string needle has been inserted into the esophagus, the top and bottom plates of the cutting blade 5 can reduce the angle between the lower clamp 3 and the upper clamp 2 to close to 0°, so that the esophagus is fixed by the lower clamp 3 and the upper clamp 2, and the puncture and suture are well performed.

[0030] After completing the above actions, keep the lower clamp 3 and upper clamp 2 closed, and allow the purse-string needle 8 to pass completely through the purse-string suture assembly. Clamp the heads of the purse-string sutures of the two purse-string needles 8 and rotate them. Open the closed laparoscopic esophagectomy purse-string suture assembly and remove it from the thoracic cavity. The esophageal stump is purse-string sutured, and the gastric stump is stapled.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A laparoscopic purse-string suture device, comprising a cannula assembly, wherein a lower clamp is fixed to the distal end of the cannula assembly, an upper clamp is hinged to the distal end of the cannula assembly, and the anastomosis surfaces of the upper and lower clamps are divided by a slide extending in the proximal direction into an anastomosis component for achieving anastomosis staples and a purse-string suture component for achieving purse-string sutures, characterized in that, The slide rail is centrally located on the substrate of the upper clamp and the lower clamp. The substrate includes a first segment and a second segment that are closer to and farther from the mating surface, respectively. The first segment and the second segment are located at the proximal and distal ends of the substrate and are connected by a ramp. A drive rod that can slide along the proximal-distal direction is provided inside the sleeve component. The distal end of the drive rod is connected to a cutting blade. The cutting blade is initially positioned on the substrate and the proximal end of the lower clamp. The upper and lower sides of the cutting blade are respectively connected to a top plate located on the upper side of the substrate and a bottom plate located within the slide rail of the lower clamp. The cutting blade can slide along the slide rail. The distance between the top plate and the bottom plate is greater than the distance between the first segment of the substrate and the bottom plate, but equal to the distance between the upper side of the second segment of the substrate and the bottom plate, which limits the opening angle of the upper clamp. The drive rod is close to the purse-string sewing component. Two purse-string needles extending in the proximal direction are provided on one side. The purse-string needles and the drive rod are respectively provided with a cutting section and a limiting block to restrict the distance of mutual sliding. A protruding block is provided at the proximal end of the sleeve component. When the drive rod is set in the initial position, the protruding block prevents the proximal end of the purse-string needle from moving towards the proximal end of the sleeve component, so that the purse-string needle extends into the proximal end of the purse-string suture component. The distance that the limiting block slides from the proximal end of the cutting section to the distal end of the cutting section is not less than the distance that the proximal end of the top plate of the cutting blade slides from the first proximal end of the base plate to the second proximal end. When the limiting block slides to the distal end of the cutting section, the distance between the distal end of the cutting blade and the distal end of the purse-string needle is greater than the distance between the distal end of the slide of the upper clamp and the distal end of the lower clamp and the distal end of the upper clamp and the lower clamp, respectively.

2. The laparoscopic purse-string suture device according to claim 1, characterized in that, The purse needle includes a purse needle shaft and a purse needle tip. The purse needle tip is located at the distal end of the purse needle shaft. The two ends of the purse suture are connected to the proximal ends of the two purse needle tips respectively. The remaining purse thread is folded and attached to the side of the purse needle shaft.

3. The laparoscopic purse-string suture device according to claim 1, characterized in that, The purse-string suture component includes a plurality of spaced-apart clamp teeth extending in the proximal direction. Each clamp tooth has a linear groove extending in the proximal direction on the end face of another purse-string suture component. When the upper clamp and the lower clamp are closed, the two purse-string needles are respectively aligned with the linear grooves of the two purse-string suture components and can move in the linear grooves. The needle eye channel located in the proximal direction of the purse-string suture component is formed by the concentric arrangement of each linear groove.

4. The laparoscopic purse-string suture device according to claim 1, characterized in that, The cutting blade has a drive end and a cutting edge. The drive end can be embedded in a connecting drive rod, and the cutting edge faces the far end of the slide.

5. The laparoscopic purse-string suture device according to claim 1, characterized in that, The grooved section is located near the proximal end of the two purse needle rods. The grooved section is a sliding plane extending in the proximal direction formed by cutting on the purse needle rod. The proximal end of the drive rod is connected to a cutting blade fixing block. The distal end of the cutting blade fixing block facing the purse needle has a limiting block with a needle hole. The needle hole of the limiting block is clearance-fitted with the sliding plane of the purse needle rod. The diameter of the needle hole of the limiting block is smaller than the diameter of the remaining section of the purse needle rod.

6. The laparoscopic purse-string suture device according to claim 5, characterized in that, The purse needle bar is a hollow structure, and the purse needle head is a stepped structure. The tail end of the purse needle head is connected to the purse needle bar and placed inside the purse needle bar. The purse needle bar has a side opening on the side away from the drive rod. The two ends of the purse thread are connected to the purse needle head, and the remaining part of the purse thread is placed inside the purse needle bar through the side opening.

7. The laparoscopic purse-string suture device according to claim 5, characterized in that, The purse needle rod is a solid rod, with a tail hole at the proximal end of the purse needle tip. The distal end of the purse needle rod is placed inside the tail hole of the purse needle tip. A through hole is provided in the middle of the purse needle tip for the purse thread to pass through. A purse thread is passed through the through holes of two purse needle tips and then knotted to form a purse thread loop. The remaining part of the purse thread loop is folded and attached to the side of the purse needle rod.

8. The laparoscopic purse-string suture device according to claim 5, characterized in that, The purse needle has a groove cut at its tip, and the two ends of the folded purse thread loop are hooked into the groove of each purse needle. The remaining part of the purse thread loop is folded and attached to the side of the purse needle shaft.

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