Ligation device and use method thereof

Abstract

The invention discloses a ligation device and a using method thereof, and relates to the technical field of medical instruments, the ligation device comprises a double-layer absorbable ligation clip and a clip applier, the double-layer absorbable ligation clip comprises an outer sleeve, a piston, an inner-layer clip and an outer-layer clip, the front end of the outer sleeve is provided with a V-shaped opening part, the V-shaped opening part is elastic, so that the V-shaped opening part can be folded and unfolded, and the clip applier is arranged in the outer sleeve. The inner-layer clamp, the outer-layer clamp and the piston are sequentially arranged in the outer sleeve from front to back, and when the piston pushes the outer-layer clamp forwards, the outer-layer clamp can enable the inner-layer clamp to be closed; the clip applier comprises a fixing mechanism, an excitation mechanism, an outer pipe, an inner pipe, an elastic component limiting pile, a pushing mechanism, an ejection mechanism, a first elastic reset component and a second elastic reset component. According to the ligation device and the using method thereof, the tubular tissue with the pipe diameter of 3-10 mm can be closed efficiently, conveniently, safely and reliably without adopting a puncture cannula with a larger pipe diameter, so that the double-layer absorbable ligation clamp can reach a larger pipe diameter closing range.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a ligation device and a method of using the same. Background Art

[0002] During laparoscopic surgery, a double-layer absorbable ligation clip, which is biodegradable and absorbable by the human body and is used to close tubular tissue, has been widely used clinically due to its secure and secure closure, ease of operation, and absence of resident tissue. However, the double-layer absorbable ligation clip has unique structural characteristics. Its components, the inner and outer clips made of medical absorbable material, must be pre-installed within a U-shaped outer sleeve with a fixed opening size. During surgical use, the outer sleeve is mounted on a dedicated double-layer absorbable ligation clip applier. The applier delivers the U-shaped outer sleeve into the abdominal cavity through a laparoscopic cannula of the corresponding size. The tubular tissue to be closed is then inserted into the U-shaped opening of the outer sleeve for containment. The applier trigger is then activated to cause the pin to push the piston, which in turn pushes the outer clip, which then engages and pushes out the inner clip. Finally, the outer clip completely engages the inner clip to close the tubular tissue, overlapping to form a double-layer clip that is then removed from the outer sleeve.

[0003] At present, all types and specifications of double-layer absorbable ligation clips on the market can only adapt to puncture sleeves with a diameter of 10mm. Therefore, the U-shaped mouth sleeve must be able to pass through this diameter and combined with the structural dimensions of each component of the product, the actual fixed opening width of the U-shaped mouth sleeve cannot exceed 7mm. Therefore, the double-layer absorbable ligation clip with this opening width can only meet the needs of closing tubular tissues with a diameter of 5mm and below in clinical applications. In various types of laparoscopic surgical procedures, there are still many edematous conditions with a diameter of 5mm to 10mm and various types of tubular tissues. Due to their thicker diameters, they cannot be fully embedded in the U-shaped mouth sleeve with an opening width of 7mm, and thus cannot be safely closed using the existing double-layer absorbable ligation clips. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a ligation device and a method of use thereof, which can efficiently, conveniently, safely and reliably close tubular tissues with a diameter of 3mm to 10mm without using a puncture cannula with a larger diameter, so that the double-layer absorbable ligation clamp can achieve a larger diameter closure range.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a ligation device, comprising a double-layer absorbable ligation clip and a clip applier, wherein the double-layer absorbable ligation clip comprises an outer sleeve, a piston, an inner layer clip and an outer layer clip, the front end of the outer sleeve has a V-shaped opening, and the V-shaped opening is elastic, so that the V-shaped opening can be retracted and expanded, the inner layer clip, the outer layer clip and the piston are arranged in the outer sleeve from front to back, and the inner layer clip corresponds to the position of the V-shaped opening. When the piston pushes the outer layer clip forward, the outer layer clip can close the inner layer clip, and the inner layer clip and the outer layer clip are both made of medical absorbable material; the clip applier comprises a fixing mechanism, an excitation mechanism, an outer tube, an inner tube, an elastic component limiting pile, a pushing mechanism, an ejection mechanism, a first elastic reset component and a second elastic reset component, the elastic component limiting pile is connected to the front end of the fixing mechanism, the inner tube is connected to the front end of the elastic component limiting pile, and the rear end of the outer sleeve can be disassembled The cam is hingedly connected to the fixing mechanism, and the ejection mechanism is slidably mounted on the elastic component limiting pile and the inner tube, the second elastic reset component is sleeved on the ejection mechanism and is located inside the elastic component limiting pile, the exciting mechanism is used to stimulate the ejection mechanism to move forward, thereby pushing the piston forward, and the second elastic reset component is used to reset the ejection mechanism.

[0007] Preferably, the fixing mechanism includes a fixed handle and a fixed sleeve arranged on the upper part of the fixed handle, the elastic component limit pile is connected to the front end of the fixed sleeve, the excitation mechanism includes an excitation handle, the excitation handle is hinged to the fixed handle, the rear end of the ejection mechanism is located in the fixed sleeve, and a first strip opening is provided at the lower part of the fixed sleeve. The upper part of the excitation handle can pass through the first strip opening and extend into the fixed sleeve, thereby being able to excite the rear end of the ejection mechanism to move it forward.

[0008] Preferably, the rear end of the inner tube is fixedly sleeved on the outside of the front end of the elastic component limiting pile, and the rear end of the inner tube is provided with a first annular limiting boss; the pushing mechanism includes an axial sleeve, a rotating wheel and a pushing sleeve, the front end of the axial sleeve is fixedly sleeved on the outside of the rear end of the outer tube, the front end of the rotating wheel is fixedly sleeved on the outside of the rear end of the axial sleeve, the axial sleeve gap is sleeved on the outside of the elastic component limiting pile, the rear end of the axial sleeve is connected to a second annular limiting boss, and the front and rear ends of the first elastic reset component respectively abut against the second an annular limiting boss and a second annular limiting boss; the front end and the rear end of the pushing sleeve are respectively an open structure and a closed structure; the lower part of the pushing sleeve is provided with a second strip opening for accommodating the upper end of the fixed handle, the second strip opening passes through the front end of the pushing sleeve, the pushing sleeve is slidably sleeved on the outside of the fixed sleeve, the front end of the pushing sleeve is abutted against the rear end of the rotating wheel, a limiting axial strip hole is provided on the pushing sleeve, a limiting component is provided on the fixed sleeve, and the limiting component extends into the limiting axial strip hole.

[0009] Preferably, the elastic component limit pile is rotatably installed at the front end of the fixed sleeve, an axial slide groove is provided on the inner wall of the axial sleeve, the rear end of the inner tube extends to the outside of the outer tube and is provided with a sliding component, the sliding component is slidably installed in the axial slide groove, and can limit the circumferential movement of the inner tube and the axial sleeve, so that the axial sleeve can drive the inner tube to rotate synchronously.

[0010] Preferably, the external fixing sleeve at the front end of the fixing sleeve is provided with a first connecting sleeve, and an annular limiting plate is provided on the inner side of the front end of the first connecting sleeve, there is a certain gap between the annular limiting plate and the front end surface of the fixing sleeve, and a plurality of ball grooves are sequentially provided on the front side of the annular limiting plate along the circumferential direction; the external fixing sleeve at the rear end of the elastic component limiting pile is provided with a second connecting sleeve, and an annular mounting block and an annular protrusion are fixedly provided on the second connecting sleeve from front to back, and the annular protrusion is located in the gap between the annular limiting plate and the front end surface of the fixing sleeve, A first annular groove is formed between the annular protrusion and the front end surface of the fixed sleeve, and a plurality of first balls are installed in the first annular groove. A second annular groove is formed between the annular protrusion and the annular limiting plate, and a plurality of second balls are installed in the second annular groove; the annular mounting block is located at the front end of the annular limiting plate, and an axial mounting groove is provided at the rear end of the annular mounting block, and a ball elastic connecting component is provided in the axial mounting groove, and the front and rear ends of the ball elastic connecting component are respectively connected to the front end surface of the axial mounting groove and the positioning ball, and the positioning ball can be snapped into any of the ball grooves.

[0011] Preferably, the rear end of the elastic component limiting pile is rotatably mounted inside the front end of the fixed sleeve through a bearing, and the outside of the rear end of the elastic component limiting pile is provided with a plurality of tooth-shaped protrusions along the circumferential direction, thereby forming a plurality of tooth grooves arranged in sequence along the circumferential direction, and a glass bead spring is provided on the side wall of the fixed sleeve, and the positioning bead of the glass bead spring can be clamped in any of the tooth grooves.

[0012] Preferably, the rear end of the elastic component limiting pile is an open structure, and the front end of the elastic component limiting pile is provided with an annular front end plate, and the ejection mechanism includes a needle head, a needle rod and a needle tail connected in sequence from front to back, the rear end of the needle rod is located in the elastic component limiting pile, and the front part of the needle rod passes through the annular front end plate and extends into the inner tube, the second elastic reset component is sleeved on the needle rod, and the front and rear ends of the second elastic reset component respectively abut against the annular front end plate and the front end surface of the needle tail, and the external fixed sleeve of the needle rod close to the needle head is provided with an annular positioning block, and the annular positioning block fits with the inner wall of the inner tube.

[0013] The locking mechanism is configured to prevent the locking cam from sliding relative to the locking cam on the left and right sides of the handle, and the locking cam is configured to prevent the locking cam from sliding relative to the locking cam on the right. The rear side of the handle is provided with two arc-shaped positioning grooves arranged in sequence from left to right, and the elastic positioning assembly includes a key marble, a marble elastic connecting component and a blocking block. A positioning mounting hole is provided on the handle body, one end of the positioning mounting hole is connected to the locking key hole, and the other end passes through the rear end of the handle body. The key marble and the marble elastic connecting component are arranged in the positioning mounting hole in sequence from front to back, and the blocking block can be removably installed at the rear end of the positioning mounting hole, and the key marble is connected to the blocking block through the marble elastic connecting component. The key marble can be clamped in any of the arc-shaped positioning grooves. When the key marble is clamped in the arc-shaped positioning groove close to the first side block, the locking block is inserted into the lock hole, so that the excitation handle and the fixed handle are relatively fixed. When the key marble is clamped in the arc-shaped positioning groove close to the second side block, the locking block leaves the lock hole, so that the excitation handle can rotate relative to the fixed handle.

[0014] Preferably, the outer sleeve includes a rear end connecting portion and an intermediate portion arranged at the front end of the rear end connecting portion, the front and rear ends of the rear end connecting portion and the intermediate portion are both open structures, and the rear end connecting portion can be detachably installed inside the front end of the inner tube; two elastic clamping arms are symmetrically provided on the upper and lower sides of the front end of the intermediate portion, and the V-shaped opening portion is formed between the two elastic clamping arms, and each elastic clamping arm is provided with a strip groove for accommodating the inner layer clamp on one side close to the other elastic clamping arm; two extension arms are symmetrically provided on the upper and lower sides of the front end of the outer tube, and each extension arm is used to retract an elastic clamping arm The left and right ends of the fixing post are respectively used to clamp the two positioning holes of the two elastic positioning arms, and a plurality of through holes are sequentially provided on each of the inner clamping arms from front to back, and each inner clamping arm is provided with a positioning hole on the side away from the other inner clamping arm. The outer clamp comprises two outer clamping arms, the rear ends of the two outer clamping arms are connected, and each outer clamping arm is provided with a guide rail extending from front to back on one side close to the other outer clamping arm, and the guide rail is a stepped guide rail, and the distance between the front ends of the opposite surfaces of the two guide rails is smaller than the distance between the rear ends of the opposite surfaces of the two guide rails, and each guide rail is used to slide in a guide groove, and a clamping piece is provided at the front end of each guide rail, and each clamping piece is used to clamp in a through hole at the front end of one of the inner clamping arms, and each clamping piece is provided on both sides. A limiting piece is provided, and a limiting groove is provided on the left and right sides of the upper and lower parts of the fixing column, and each of the limiting pieces is used to be installed in one of the limiting grooves; the piston includes a piston block and elastic positioning plates arranged on the upper and lower sides of the rear part of the piston block, and a positioning port is provided on the upper and lower sides of the rear end connecting part, and the rear end of each elastic positioning plate is used to be clamped in one of the positioning ports, and a limiting protrusion is provided on the front end of each elastic positioning arm close to the other elastic positioning arm, and the two limiting protrusions are used to limit the piston block to prevent the piston from falling out of the front end of the outer sleeve.

[0015] The present invention also provides a method for using the ligation device, comprising the following steps:

[0016] Step 1: Install the rear end of the outer tube to the front end of the inner tube, and use the pushing mechanism to push the outer tube forward relative to the inner tube, thereby retracting the V-shaped opening so that the diameter of the V-shaped opening does not exceed the outer diameter of the outer tube;

[0017] Step 2: The front ends of the double-layer absorbable ligation clip and the clip applier are inserted into the area to be ligated in the human body through the puncture cannula, and the pushing mechanism is released. The first elastic reset component resets the pushing mechanism and the outer tube, so that the V-shaped opening opens to the initial state.

[0018] Step 3: The tubular tissue to be closed is embedded in the V-shaped opening for containing, and then the ejection mechanism is activated by the activation mechanism to move forward, thereby pushing the piston forward, and then the piston pushes the outer clamp, and then the outer clamp bites and pushes out the inner clamp, and finally the outer clamp completely bites the inner clamp to close the tubular tissue, and then the outer clamp and the inner clamp are separated from the outer sleeve, the activation mechanism is released, and the ejection mechanism is reset under the action of the second elastic reset component;

[0019] Step 4: Push the outer tube forward relative to the inner tube again by the pushing mechanism, thereby retracting the V-shaped opening, and withdrawing the double-layer absorbable ligation clip and the front end of the clip applier through the puncture cannula to the outside of the human body.

[0020] Compared with the prior art, the present invention has achieved the following technical effects:

[0021] The ligation device of the present invention includes a double-layer absorbable ligation clamp and a clamp applier. The double-layer absorbable ligation clamp includes an outer sleeve, a piston, an inner layer clamp, and an outer layer clamp. The front end of the outer sleeve has a V-shaped opening. The V-shaped opening is elastic, so that the V-shaped opening can be retracted. The inner layer clamp, the outer layer clamp, and the piston are arranged in sequence in the outer sleeve from front to back. The inner layer clamp corresponds to the position of the V-shaped opening. When the piston pushes the outer layer clamp forward, the outer layer clamp can close the inner layer clamp. The pushing mechanism is used to push the outer tube forward relative to the inner tube, thereby retracting the V-shaped opening. The first elastic reset component is used to reset the pushing mechanism and the outer tube. In the present invention, by using a retractable V-shaped opening and a clamp applier that can cooperate with it to retract the V-shaped opening, it is possible to achieve the goal of not using a larger diameter puncture cannula. By using a 10mm diameter puncture cannula, tubular tissue with a diameter of 3mm to 10mm can be efficiently, conveniently, safely and reliably closed, so that the double-layer absorbable ligation clamp can achieve a larger diameter closure range. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A cross-sectional view of the ligation device provided in Example 1 of the present invention;

[0024] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0025] Figure 3 for Figure 1 A partial enlarged view of point B in the middle;

[0026] Figure 4 This is a schematic structural diagram of a clip applier in a ligation device according to a first embodiment of the present invention;

[0027] Figure 5 A cross-sectional view of the front end of the clip applier in the ligation device provided in the first embodiment of the present invention;

[0028] Figure 6 This is a schematic structural diagram of a fixed handle of a clip applier in a ligation device provided in Embodiment 1 of the present invention;

[0029] Figure 7 This is a schematic structural diagram of the ligation device provided in the first embodiment of the present invention after the fixed handle is removed from the rear end of the clip applier;

[0030] Figure 8 A schematic structural diagram of a locking key of a clip applier in a ligation device according to a first embodiment of the present invention;

[0031] Figure 9 A schematic structural diagram of the axial sleeve and the second annular limiting boss of the clip applier in the ligation device provided in the first embodiment of the present invention;

[0032] Figure 10 This is a schematic structural diagram of the first connecting sleeve and the annular limiting plate of the clip applier in the ligation device provided in the first embodiment of the present invention;

[0033] Figure 11 This is a schematic structural diagram of a double-layer absorbable ligation clip in the ligation device provided in Example 1 of the present invention;

[0034] Figure 12 A cross-sectional view of a double-layer absorbable ligation clip in the ligation device provided in Example 1 of the present invention;

[0035] Figure 13 This is a schematic structural diagram of the outer sleeve of the double-layer absorbable ligation clip in the ligation device provided in the first embodiment of the present invention;

[0036] Figure 14 This is a schematic diagram of the structure of the double-layer absorbable ligation clamp in the ligation device provided in Example 1 of the present invention after the outer cover is removed;

[0037] Figure 15 This is a schematic diagram of the first structure of the inner layer clip of the double-layer absorbable ligation clip in the ligation device provided in Example 1 of the present invention;

[0038] Figure 16 This is a schematic diagram of the second structure of the inner layer clip of the double-layer absorbable ligation clip in the ligation device provided in the first embodiment of the present invention;

[0039] Figure 17 This is a schematic diagram of the first structure of the outer layer of the double-layer absorbable ligation clip in the ligation device provided in the first embodiment of the present invention;

[0040] Figure 18 This is a schematic diagram of the second structure of the outer layer of the double-layer absorbable ligation clip in the ligation device provided in Example 1 of the present invention;

[0041] Figure 19 This is a schematic structural diagram of a piston in a double-layer absorbable ligation clip in a ligation device provided in Example 1 of the present invention;

[0042] Figure 20 This is a front view of the outer sleeve of the double-layer absorbable ligation clip in the ligation device provided in Example 1 of the present invention;

[0043] Figure 21 for Figure 20 Cross-sectional view at CC;

[0044] Figure 22 A top view of the outer sleeve of the double-layer absorbable ligation clip in the ligation device provided in Example 1 of the present invention;

[0045] Figure 23 for Figure 22 Cross-sectional view at DD in the middle;

[0046] Figure 24 This is a schematic diagram of the clamping effect of the outer layer of the double-layer absorbable ligation clamp on the tubular tissue when the ligation device provided by the first embodiment of the present invention is used;

[0047] Figure 25 Schematic diagram of the clamping effect of the tubular tissue when the outer clamp in the prior art is used;

[0048] Figure 26 This is a schematic structural diagram of the V-shaped opening of the double-layer absorbable ligation clip in the ligation device provided in Example 1 of the present invention when it is in an open state;

[0049] Figure 27 This is a schematic structural diagram of the double-layer absorbable ligation clamp in the ligation device provided in Example 1 of the present invention when the V-shaped opening is in a retracted state;

[0050] Figure 28This is a diagram of the internal structure of the double-layer absorbable ligation clip of the ligation device provided in Example 1 of the present invention when installed;

[0051] Figure 29 This is a diagram of the internal structure of the ligation device provided in Example 1 of the present invention after the double-layer absorbable ligation clip is installed;

[0052] Figure 30 A cross-sectional view of the double-layer absorbable ligation clip of the ligation device provided in the first embodiment of the present invention during installation;

[0053] Figure 31 This is a cross-sectional view of the double-layer absorbable ligation clip in the ligation device provided in the first embodiment of the present invention after installation;

[0054] Figure 32 A schematic diagram of the structure of the rotational mounting portion of the elastic component limit pile and the fixed sleeve provided in the second embodiment of the present invention;

[0055] Figure 33 This is a structural diagram of the elastic component limiting pile provided in the second embodiment of the present invention.

[0056] Description of reference numerals: 100, ligation device;

[0057] 1. Double-layer absorbable ligation clamp; 11. Rear connecting portion; 12. Middle portion; 13. Elastic clamping arm; 14. Elastic positioning arm; 15. Inner clamp; 1501. Fixing column; 1502. Inner clamping arm; 1503. Through hole; 1504. Guide groove; 1505. Limiting groove; 1506. Raised strip; 16. Outer clamp; 1601. Outer clamping arm; 1602. Guide rail; 1603. Snap-fit ​​member; 1604. Limiting member; 17. Piston; 1701. Horizontal block; 1702. Front vertical block; 1703. Rear vertical block; 1704. Elastic positioning plate; 18. Positioning port; 19. Strip groove; 110. Positioning hole; 111. First piston chute; 112. Second piston chute; 113. Third piston chute; 114. Limiting protrusion;

[0058] 2. Clip applier; 21. Fixed handle; 2101. Handle body; 2102. Side plate; 2103. Locking key hole; 2104. Positioning mounting hole; 22. Trigger handle; 23. Gill shaft screw; 24. Locking hole; 25. Locking key; 2501. Intermediate block; 2502. First side block; 2503. Second side block; 2504. Locking block; 2505. Arc positioning groove; 26. Limiting block; 27. Key position marble; 28. Elastic connecting member of marble; 29. ​​Blocking block; 210. Fixed sleeve; 211. Push sleeve; 212. Limiting axial strip hole; 213. Push handle; 214. Elastic member limiting pile; 215. Inner tube; 216. First annular limiting boss; 217. First elastic reset member; 218. Second elastic reset member; 219. Rotating wheel; 2 20. Axial sleeve; 221. Fixing pin; 222. Second pin hole; 223. Second annular limiting boss; 224. Axial slide groove; 225. Sliding component; 226. Outer tube; 227. Extension arm; 228. Needle tail; 229. Needle rod; 230. Needle head; 231. Annular positioning block; 232. First connecting sleeve; 233. Annular limiting plate; 234. Ball groove; 235. Second connecting sleeve; 236. Annular protrusion; 237. First ball; 238. Second ball; 239. Annular mounting block; 240. Ball elastic connecting component; 241. Positioning ball; 242. Bearing; 243. Toothed protrusion; 244. Glass ball spring; 245. Mounting plate; 246. Mounting protrusion; 247. Clamping block; 248. Extension plate; 249. Limiting column. DETAILED DESCRIPTION

[0059] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0060] The purpose of the present invention is to provide a ligation device and a method of use thereof, which can efficiently, conveniently, safely and reliably close tubular tissues with a diameter of 3mm to 10mm without using a puncture cannula with a larger diameter, so that the double-layer absorbable ligation clamp can achieve a larger diameter closure range.

[0061] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0062] Example 1:

[0063] like Figure 1-Figure 24 as well as Figure 26-Figure 27As shown, this embodiment provides a ligation device 100, including a double-layer absorbable ligation clip 1 and a clip applier 2. The double-layer absorbable ligation clip 1 includes an outer sleeve, a piston 17, an inner layer clip 15 and an outer layer clip 16. The front end of the outer sleeve has a V-shaped opening portion, and the V-shaped opening portion is elastic so that the V-shaped opening portion can be retracted and extended. The inner layer clip 15, the outer layer clip 16 and the piston 17 are arranged in the outer sleeve from front to back. The inner layer clip 15 corresponds to the position of the V-shaped opening portion. When the piston 17 pushes the outer layer clip 16 forward, the outer layer clip 16 can close the inner layer clip 15. Both the inner layer clip 15 and the outer layer clip 16 are made of medical absorbable materials.

[0064] The clip applier 2 is used to assist in clamping the double-layer absorbable ligation clip 1 with a retractable V-shaped opening. Specifically, the clip applier 2 includes a fixing mechanism, an excitation mechanism, an outer tube 226, an inner tube 215, an elastic component limiting pile 214, a pushing mechanism, an ejection mechanism, a first elastic reset component 217 and a second elastic reset component 218. The elastic component limiting pile 214 is connected to the front end of the fixing mechanism, the inner tube 215 is connected to the front end of the elastic component limiting pile 214, and the rear end of the outer sleeve can be detachably mounted on the front end of the inner tube 215, thereby realizing the detachable installation of the double-layer absorbable ligation clip 1 and the inner tube 215. The outer tube 226 is slidably sleeved on the outside of the inner tube 215, the pushing mechanism is slidably sleeved on the outside of the elastic component limiting pile 214 and the upper part of the fixing mechanism, and the front end of the pushing mechanism is connected to the rear end of the outer tube 226, the first elastic reset component 217 is sleeved on the outside of the elastic component limiting pile 214, the pushing mechanism is used to push the outer tube 226 to move forward relative to the inner tube 215, thereby retracting the V-shaped opening, and the first elastic reset component 217 is used to reset the pushing mechanism and the outer tube 226; the excitation mechanism is hinged to the fixing mechanism, and the ejection mechanism is slidably installed in the elastic component limiting pile 214 and the inner tube 215, the second elastic reset component 218 is sleeved on the ejection mechanism and is located inside the elastic component limiting pile 214, the excitation mechanism is used to excite the ejection mechanism, move it forward, and thereby push the piston 17 forward, and the second elastic reset component 218 is used to reset the ejection mechanism.

[0065] The V-shaped opening in this embodiment is retractable. Before entering the puncture cannula, the outer tube 226 is extended forward to shrink the V-shaped opening. After entering the area to be ligated, the outer tube 226 moves backward, allowing the V-shaped opening to open and return to its initial, practical state. This eliminates the need to increase the diameter of the puncture cannula to accommodate the larger opening of the double-layer absorbable ligation clip 1 during actual use. Thus, by utilizing a retractable V-shaped opening and a clip applier 2 that cooperates with it to retract the V-shaped opening, this embodiment eliminates the need to use a larger-diameter puncture cannula. By using a 10mm-diameter puncture cannula, tubular tissues with diameters of 3mm to 10mm can be efficiently, conveniently, safely, and reliably closed. This allows the double-layer absorbable ligation clip to achieve a wider range of tube closures. Furthermore, this invention fills the market gap for double-layer absorbable ligation clips 1 that can close tubular tissues with diameters of 5mm to 10mm, providing more clinical options for tube closure solutions.

[0066] The fixing mechanism includes a fixing handle 21 and a fixing sleeve 210 disposed above the fixing handle 21. An elastic component limit post 214 is connected to the front end of the fixing sleeve 210. The triggering mechanism includes a triggering handle 22, which is hinged to the fixing handle 21. In this embodiment, the triggering handle 22 is hinged to the fixing handle 21 via a gill screw 23. The rear end of the ejection mechanism is located in the fixing sleeve 210. The lower portion of the fixing sleeve 210 is provided with a first strip opening. The upper portion of the triggering handle 22 can pass through the first strip opening and extend into the fixing sleeve 210, thereby triggering the rear end of the ejection mechanism to move it forward.

[0067] The rear end of the inner tube 215 is fixedly sleeved on the outside of the front end of the elastic component limiting pile 214, and the rear end of the inner tube 215 is provided with a first annular limiting boss 216; the pushing mechanism includes an axial sleeve 220, a rotating wheel 219 and a pushing sleeve 211, the front end of the axial sleeve 220 is fixedly sleeved on the outside of the rear end of the outer tube 226, the front end of the rotating wheel 219 is fixedly sleeved on the outside of the rear end of the axial sleeve 220, the axial sleeve 220 is gap-sleeved on the outside of the elastic component limiting pile 214, the rear end of the axial sleeve 220 is connected to the second annular limiting boss 223, and the front and rear ends of the first elastic reset component 217 are respectively abutted on the first annular limiting boss 216 and the second annular limiting boss 223.

[0068] The front end and rear end of the pushing sleeve 211 are respectively an open structure and a closed structure. The lower part of the pushing sleeve 211 is provided with a second strip opening for accommodating the upper end of the fixed handle 21. The second strip opening passes through the front end of the pushing sleeve 211. The pushing sleeve 211 is slidably sleeved on the outside of the fixed sleeve 210. The front end of the pushing sleeve 211 abuts against the rear end of the rotating wheel 219. A limited axial strip hole 212 is provided on the pushing sleeve 211, and a limited component is provided on the fixed sleeve 210. The limiting component extends into the limiting axial strip hole 212. The limiting component cooperates with the limiting axial strip hole 212. On the one hand, the pushing sleeve 211 can only move axially relative to the fixed sleeve 210. On the other hand, the pushing sleeve 211 is prevented from falling out of the rear end of the fixed sleeve 210.

[0069] In this embodiment, a pushing handle 213 is provided on both the left and right sides of the pushing sleeve 211 to facilitate pushing the pushing sleeve 211 .

[0070] During operation, the push sleeve 211 in this embodiment sequentially drives the rotating wheel 219, the axial sleeve 220, and the outer tube 226 to achieve axial movement relative to the inner tube 215, thereby adjusting the diameter of the V-shaped opening. The first elastic reset member 217 is used to reset the outer tube 226, the axial sleeve 220, the rotating wheel 219, and the push sleeve 211.

[0071] Specifically, two limiting axial strip holes 212 are symmetrically provided on the left and right sides of the pushing sleeve 211 , and two limiting components are symmetrically provided on the left and right sides of the fixing sleeve 210 , and each limiting component extends into one limiting axial strip hole 212 .

[0072] In this specific embodiment, the limiting component is a limiting screw, and the axial direction of the limiting screw is perpendicular to the axial direction of the fixing sleeve 210 .

[0073] In this specific embodiment, a first pin hole is provided on the rotating wheel 219, and a second pin hole 222 is provided on the axial sleeve 220. The fixing pin 221 is fixedly installed in the first pin hole and the second pin hole 222 to achieve a fixed connection between the rotating wheel 219 and the axial sleeve 220.

[0074] like Figure 3As shown, the elastic component limiting pile 214 is rotatably installed on the front end of the fixed sleeve 210, and an axial sliding groove 224 is provided on the inner wall of the axial sleeve 220. The rear end of the inner tube 215 extends to the outside of the outer tube 226 and is provided with a sliding component 225. The sliding component 225 is slidably installed in the axial sliding groove 224 and can limit the circumferential movement of the inner tube 215 and the axial sleeve 220, so that the axial sleeve 220 can drive the inner tube 215 to rotate synchronously, so that the runner 219, axial sleeve 220, outer tube 226, inner tube 215 and elastic component limiting pile 214 in this embodiment can achieve synchronous rotation, and can enable the runner 219, axial sleeve 220 and outer tube 226 to slide axially relative to the inner tube 215 and the elastic component limiting pile 214.

[0075] In this specific embodiment, the sliding component 225 is a sliding pin, and the axial direction of the sliding pin is perpendicular to the axial direction of the inner tube 215 .

[0076] The following is one way to rotatably mount the elastic member limiting pile 214 on the front end of the fixed sleeve 210 .

[0077] In this specific embodiment, the external fixed sleeve of the front end of the fixed sleeve 210 is provided with a first connecting sleeve 232, and an annular limiting plate 233 is provided on the inner side of the front end of the first connecting sleeve 232. There is a certain gap between the annular limiting plate 233 and the front end surface of the fixed sleeve 210, and a plurality of ball grooves 234 are sequentially provided on the front side of the annular limiting plate 233 along the circumferential direction; the external fixed sleeve of the rear end of the elastic component limiting pile 214 is provided with a second connecting sleeve 235, and an annular mounting block 239 and an annular protrusion 236 are fixedly provided on the second connecting sleeve 235 from front to back. The annular protrusion 236 is located in the gap between the annular limiting plate 233 and the front end surface of the fixed sleeve 210, and a first annular groove is formed between the annular protrusion 236 and the front end surface of the fixed sleeve 210, and a plurality of first balls 237 are installed in the first annular groove. A second annular groove is formed between the annular protrusion 236 and the annular limiting plate 233, and a plurality of second balls 238 are installed in the second annular groove; the annular mounting block 239 is located at the front end of the annular limiting plate 233, and the rear end of the annular mounting block 239 is provided with an axial mounting groove, and a ball elastic connecting component 240 is provided in the axial mounting groove, and the front and rear ends of the ball elastic connecting component 240 are respectively connected to the front end surface of the axial mounting groove and the positioning ball 241, and the positioning ball 241 can be clamped in any ball groove 234, so that after the rotating wheel 219 rotates, the positioning ball 241 is clamped in a ball groove 234, so that the rotating wheel 219, the axial sleeve 220, the outer tube 226, the elastic component limiting pile 214, the inner tube 215 and the double-layer absorbable ligation clip 1 installed at the front end of the inner tube 215 are rotated to a suitable angle and maintained at this angle.

[0078] The rear end of the elastic component limiting pile 214 is an open structure, and the front end of the elastic component limiting pile 214 is provided with an annular front end plate. The ejection mechanism includes a needle head 230, a needle rod 229 and a needle tail 228 connected in sequence from front to back. The rear end of the needle rod 229 is located in the elastic component limiting pile 214, and the front part of the needle rod 229 passes through the annular front end plate and extends into the inner tube 215. The second elastic reset component 218 is sleeved on the needle rod 229, and the front and rear ends of the second elastic reset component 218 respectively abut against the front end surfaces of the annular front end plate and the needle tail 228. The external fixed sleeve of the end of the needle rod 229 close to the needle head 230 is provided with an annular positioning block 231, and the annular positioning block 231 is in contact with the inner wall of the inner tube 215. By setting the annular positioning block 231, the needle rod 229 is located in the center position of the inner tube 215.

[0079] Specifically, the outer diameters of the needle head 230, the needle rod 229 and the needle tail 228 increase successively, and the needle head 230, the needle rod 229 and the needle tail 228 are coaxially arranged, the rear end of the needle head 230 is fixed to the inside of the front end of the needle rod 229, and the rear end of the needle rod 229 is fixed to the inside of the front end of the needle tail 228, so that the rear end of the second elastic reset component 218 can abut against the front end surface of the needle tail 228.

[0080] like Figure 6-Figure 8As shown, this embodiment also includes an anti-misoperation mechanism. The fixed handle 21 includes a handle body 2101 and two side plates 2102 arranged on the front side of the upper part of the handle body 2101. The trigger handle 22 is located between the two side plates 2102 and is hinged to the two side plates 2102. The fixed handle 21 is provided with a locking key hole 2103 running through the left and right sides. The front end of the locking key hole 2103 runs through the two side plates 2102, and the rear end of the locking key hole 2103 runs through the handle body 21. 01 is close to the left and right sides of one end of the side plate 2102; a lock hole 24 is provided on the excitation handle 22, and the anti-misoperation mechanism includes a locking key 25 and an elastic positioning component. The locking key 25 includes an intermediate block 2501, a first side block 2502, a second side block 2503 and a locking block 2504. The first side block 2502 and the second side block 2503 are respectively arranged on the left and right sides of the front of the intermediate block 2501. A locking block 2504 is provided on one side of the first side block 2502 close to the second side block 2503. A limit block 26 is provided on the outside of the side block 2502. The size of the limit block 26 is larger than the size of the locking key hole 2103. The first side block 2502 and the second side block 2503 can both move left and right in the locking key hole 2103. The locking block 2504 can be inserted into the lock hole 24. The rear side of the middle block 2501 is provided with two arc-shaped positioning grooves 2505 arranged from left to right. The elastic positioning assembly includes a key marble 27, a marble elastic connecting component 28 and a blocking block 29. The handle body 2101 is provided with a plurality of arc-shaped positioning grooves 2505. A positioning mounting hole 2104 is provided, one end of the positioning mounting hole 2104 is connected to the locking key hole 2103, and the other end passes through the rear end of the handle body 2101. The key position marble 27 and the marble elastic connecting component 28 are arranged in the positioning mounting hole 2104 from front to back, and the block 29 can be removably installed at the rear end of the positioning mounting hole 2104. The key position marble 27 is connected to the block 29 through the marble elastic connecting component 28, and the key position marble 27 can be clamped in any arc-shaped positioning groove 2505.

[0081] During use, the key position marble 27 can be switched to different arc-shaped positioning grooves 2505 by toggling the locking key 25 left and right. When the key position marble 27 is engaged in the arc-shaped positioning groove 2505 near the first side block 2502, the locking block 2504 is inserted into the lock hole 24, so that the trigger handle 22 and the fixed handle 21 are relatively fixed, thereby preventing misoperation; when the key position marble 27 is engaged in the arc-shaped positioning groove 2505 near the second side block 2503, the locking block 2504 leaves the lock hole 24, so that the trigger handle 22 can rotate relative to the fixed handle 21. At this time, the ejection mechanism can be activated by toggling the trigger handle 22.

[0082] In this specific embodiment, the first elastic restoring component 217 , the second elastic restoring component 218 , the ball elastic connecting component 240 and the marble elastic connecting component 28 are all springs.

[0083] like Figure 11-14 As shown, the outer sleeve includes a rear end connecting portion 11 and an intermediate portion 12 arranged at the front end of the rear end connecting portion 11. The front and rear ends of the rear end connecting portion 11 and the intermediate portion 12 are both open structures, and the rear end connecting portion 11 can be detachably installed inside the front end of the inner tube 215; two elastic clamping arms 13 are symmetrically arranged on the upper and lower sides of the front end of the intermediate portion 12, and a V-shaped opening is formed between the two elastic clamping arms 13. A strip groove 19 for accommodating the inner layer clip 15 is provided on the side of each elastic clamping arm 13 close to the other elastic clamping arm 13; two extension arms 227 are symmetrically arranged on the upper and lower sides of the front end of the outer tube 226, and each extension arm 227 is used to retract an elastic clamping arm 13; two elastic positioning arms 14 are symmetrically arranged on the left and right sides of the intermediate portion 12, and each elastic positioning arm 14 extends forward relative to the intermediate portion 12, and a positioning hole 110 is provided at the front end of each elastic positioning arm 14.

[0084] like Figure 15 and Figure 16 As shown, the inner layer clamp 15 includes a fixed column 1501 and inner clamping arms 1502 symmetrically arranged on the upper and lower sides of the front end of the fixed column 1501, and each inner clamping arm 1502 is used to be set in a strip groove 19, and the left and right ends of the fixed column 1501 are respectively used to be clamped in the two positioning holes 110 of the two elastic positioning arms 14, and each inner clamping arm 1502 is provided with a plurality of through holes 1503 in sequence from front to back. The through holes 1503 in this embodiment are square holes or circular holes, and each inner clamping arm 1502 is provided with a guide groove 1504 extending from front to back on the side away from the other inner clamping arm 1502.

[0085] like Figure 17 and Figure 18 As shown, the outer clamp 16 includes two outer clamping arms 1601, the rear ends of the two outer clamping arms 1601 are connected, and each outer clamping arm 1601 is provided with a guide rail 1602 extending from front to back on one side close to the other outer clamping arm 1601, and each guide rail 1602 is used to slide in a guide groove 1504, and each guide rail 1602 is provided with a clamping member 1603 at the front end, and each clamping member 1603 is used to clamp into a through hole 1503 at the front end of an inner clamping arm 1502, and each clamping member 1603 is provided with a limiting member 1604 on the left and right sides, and a limiting groove 1505 is provided on the left and right sides of the upper and lower parts of the fixing column 1501, and each limiting member 1604 is used to be installed in a limiting groove 1505, and the limiting member 1604 cooperates with the limiting groove 1505 to ensure that the outer clamp 16 and the inner clamp maintain a relatively stable state initially.

[0086] like Figure 25As shown, in the prior art, the guide rail of the outer clamp is straight, which has a poor clamping effect on the tubular tissue and easily causes incomplete closure of the tubular tissue.

[0087] like Figure 24 As shown, the guide rails 1602 in this embodiment are stepped guide rails, and the distance between the front ends of the opposing surfaces of the two guide rails 1602 is smaller than the distance between the rear ends of the opposing surfaces of the two guide rails 1602. Since the front ends of the two outer clamping arms 1601 are open, this affects the clamping force of the outer clamping arms 1601. Therefore, in this embodiment, the stepped guide rails are used to reduce the distance between the ends of the two outer clamping arms 1601 near the openings, thereby enhancing the clamping effect of the outer clamping arms 1601 and thereby improving the sealing effect on the tubular tissue.

[0088] like Figure 19 As shown, the piston 17 includes a piston block and elastic positioning plates 1704 arranged on the upper and lower sides of the rear part of the piston block. A positioning hole 18 is provided on the upper and lower sides of the rear end connecting part 11. The rear end of each elastic positioning plate 1704 is used to be clamped in a positioning hole 18. The front end of each elastic positioning arm 14 close to the other elastic positioning arm 14 is provided with a limiting protrusion 114. The two limiting protrusions 114 are used to limit the piston block to prevent the piston 17 from falling out of the front end of the outer sleeve.

[0089] Specifically, the piston block includes a horizontal block 1701, two front vertical blocks 1702 and two rear vertical blocks 1703. The two front vertical blocks 1702 are respectively arranged on the upper and lower sides of the middle of the front end of the horizontal block 1701, and the two rear vertical blocks 1703 are respectively arranged on the upper and lower sides of the middle of the rear end of the horizontal block 1701. Two elastic positioning plates 1704 are arranged on the upper and lower sides of the horizontal block 1701, and each elastic positioning plate 1704 is located between a front vertical block 1702 and a rear vertical block 1703.

[0090] like Figure 20-23 As shown, each elastic positioning arm 14 is provided with a first piston groove 111 on the side close to the other elastic positioning arm 14, and the front end of the first piston groove 111 is connected to the limiting protrusion 114, and the inner side wall of the middle part 12 and the rear end connecting part 11 is provided with a second piston groove 112 connected with the first piston groove 111, and each connected first piston groove 111 and second piston groove 112 is used to guide one side of the horizontal block 1701, and a third piston groove 113 connected with the strip groove 19 is provided on the middle part 12 and the rear end connecting part 11, and each third piston groove 113 is used to guide a front vertical block 1702 and a rear vertical block 1703.

[0091] When the ejection mechanism pushes the piston block forward, the elastic positioning plate 1704 disengages from the positioning port 18, applying a forward thrust to the outer layer clamp 16, so that each guide rail 1602 of the outer layer clamp 16 slides along a guide groove 1504 of the inner layer clamp 15, so that each clamping member 1603 of the outer layer clamp 16 is clamped in a through hole 1503 at the front end of an inner clamping arm 1502, and the outer layer clamp 16 completely bites the inner layer clamp 15 to close the tubular tissue. Under the continued action of the thrust, the fixed column 1501 of the inner layer clamp 15 disengages from the two positioning holes 110, thereby realizing the separation of the inner layer clamp 15 and the outer layer clamp 16 from the outer jacket.

[0092] Specifically, a plurality of ridges 1506 are sequentially provided on the side of each inner clamping arm 1502 adjacent to the other inner clamping arm 1502, from front to back. The ridges 1506 extend along the length of the inner clamping arm 1502. The ridges 1506 on the two inner clamping arms 1502 are staggered, thereby achieving a better closure effect on the tubular tissue. In this embodiment, a row of ridges 1506 is provided in the middle of one inner clamping arm 1502, and two rows of ridges 1506 are provided on the other inner clamping arm 1502, sequentially arranged from left to right. The row of ridges 1506 on one inner clamping arm 1502 is located between the two rows of ridges 1506 on the other inner clamping arm 1502.

[0093] In this embodiment, the inner clip 15 is made of a medically absorbable polymer, such as polydioxanone (PPDO); the outer clip 16 is made of a medically absorbable polymer, such as polyglycolic acid (PGA). Both inner and outer clips 15, 16 are ultimately degraded into carbon dioxide and water, leaving no residue in the body. The rear connecting portion 11, intermediate portion 12, elastic clip arms 13, and elastic positioning arms 14 of the outer sleeve are all made of an elastic plastic material. The elastic clip arms 13 are elastically deformable and effectively recoverable.

[0094] In order to facilitate the detachable installation of the double-layer absorbable ligation clip 1 and the inner tube 215, this embodiment also includes a mounting head, a mounting opening is provided on the side wall of the front end of the inner tube 215, and the mounting opening passes through the front end of the inner tube 215. The mounting head includes a mounting plate 245, and the rear end of the lower part of the mounting plate 245 is provided with an extension plate 248 extending into the inner tube 215. A mounting protrusion 246 is provided at the center of the lower part of the mounting plate 245, and a clamping block 247 is provided at the front end of the lower part of the mounting plate 245. The mounting plate 245 is located at the mounting opening, and the mounting protrusion 246 is rotatably installed on the inner tube 215 through a pin shaft. A torsion spring is sleeved on the pin shaft, and the clamping block 247 can be clamped in a positioning opening 18. The extension plate 248 limits the rear end of the mounting plate 245 from rotating outward, and an operating opening corresponding to the position of the mounting opening is provided on the outer tube 226.

[0095] A limiting column 249 is provided on the inner wall of the inner tube 215. The limiting column 249 is located on the side away from the installation opening, and the limiting column 249 is located between the clamping block 247 and the installation protrusion 246. The limiting column 249 is used to limit the rear end of the rear end connection part 11 when the outer sleeve is installed.

[0096] like Figures 28-31 As shown, when the outer sleeve and the clip applier 2 are assembled, the clamping block 247 and the piston 17 share a positioning hole 18, that is, a positioning hole 18 on the side wall of the rear end connecting part 11 cooperates with the clamping block 247. When the double-layer absorbable ligation clip 1 needs to be installed, the rear end of the mounting plate 245 is pressed, so that the front end of the mounting plate 245 rotates outward, pushing the rear end connecting part 11 backward, and the rear end connecting part 11 abuts on the limiting column 249. The rear end of the mounting plate 245 is loosened, and the rear end of the mounting plate 245 returns to its original position under the action of the torsion spring, so that the front end of the mounting plate 245 rotates inward, so that the positioning hole 18 is clamped with the clamping block 247, thereby realizing the installation of the outer sleeve and the inner tube 215, and then limiting the relative circumferential movement of the outer sleeve and the inner tube 215, so that the outer sleeve can rotate synchronously with the inner tube 215. When the outer cover needs to be removed, the rear end of the mounting plate 245 is pressed to rotate the front end of the mounting plate 245 outward, so that the engaging block 247 is disengaged from the positioning opening 18 , and the outer cover can be removed at this time.

[0097] This embodiment also provides a method for using the ligation device 100, comprising the following steps:

[0098] Step 1: Figure 26 As shown, the rear end of the outer sleeve is mounted on the front end of the inner tube 215, specifically, the clamping block 247 is clamped into a positioning hole 18 of the outer sleeve; the pushing mechanism pushes the outer tube 226 to move forward relative to the inner tube 215, as shown in FIG. Figure 27 As shown, the V-shaped opening is retracted so that the diameter of the V-shaped opening does not exceed the outer diameter of the outer tube 226.

[0099] Specifically, before installing the double-layer absorbable ligation clip 1, the locking key 25 is turned so that the key ball 27 is engaged in the arc-shaped positioning groove 2505 close to the first side block 2502, and the locking block 2504 is inserted into the lock hole 24, so that the trigger handle 22 and the fixed handle 21 are relatively fixed, thereby preventing misoperation.

[0100] Step 2: The front ends of the double-layer absorbable ligation clip 1 and the clip applier 2 are passed through the puncture cannula into the area to be ligated in the human body, the pushing mechanism is released, and the first elastic reset component 217 resets the pushing mechanism and the outer tube 226, so that the V-shaped opening opens to the initial state.

[0101] Then, the rotating wheel 219 is turned, and the positioning ball 241 cooperates with the ball groove 234, so that the rotating wheel 219, the axial sleeve 220, the outer tube 226, the elastic component limit pile 214, the inner tube 215 and the double-layer absorbable ligation clip 1 installed at the front end of the inner tube 215 are rotated to a suitable angle and maintained at this angle, so as to facilitate the closure of the tubular tissue to be closed in the next step.

[0102] Step three: embed the tubular tissue to be closed into the V-shaped opening for containment, and then activate the ejection mechanism through the activation mechanism to move it forward, thereby pushing the piston 17 forward, and then the piston 17 pushes the outer layer clamp 16, and then the outer layer clamp 16 bites and pushes out the inner layer clamp 15, and finally the outer layer clamp 16 completely bites the inner layer clamp 15 to close the tubular tissue, and then the outer layer clamp 16 and the inner layer clamp 15 are separated from the outer jacket, releasing the activation mechanism, and the ejection mechanism is reset under the action of the second elastic reset component 218.

[0103] Specifically, before using the triggering mechanism, the locking key 25 is turned so that the key position ball 27 is engaged in the arc-shaped positioning groove 2505 close to the second side block 2503, and the locking block 2504 leaves the lock hole 24, so that the triggering handle 22 can rotate relative to the fixed handle 21. At this time, the ejection mechanism can be triggered by turning the triggering handle 22.

[0104] Step 4: Use the push mechanism again to push outer tube 226 forward relative to inner tube 215, thereby retracting the V-shaped opening and withdrawing the double-layer absorbable ligature clip 1 and the front end of the clip applier 2 through the puncture cannula to the outside of the human body. Remove the outer cover of the used double-layer absorbable ligature, thus completing the use of ligature device 100.

[0105] Example 2:

[0106] like Figure 32-Figure 33 As shown, the difference between this embodiment and the first embodiment lies in the rotational installation method of the elastic component limiting pile 214 and the fixed sleeve 210. Specifically, the rear end of the elastic component limiting pile 214 is rotatably installed inside the front end of the fixed sleeve 210 through the bearing 242. The outside of the rear end of the elastic component limiting pile 214 is circumferentially provided with a plurality of tooth-shaped protrusions 243, thereby forming a plurality of tooth grooves arranged in sequence along the circumferential direction. A glass bead spring 244 is provided on the side wall of the fixed sleeve 210. The positioning bead of the glass bead spring 244 can be engaged in any tooth groove, so that after the rotating wheel 219 rotates, the positioning bead of the glass bead spring 244 is engaged in a tooth groove, so that the rotating wheel 219, the axial sleeve 220, the outer tube 226, the elastic component limiting pile 214, the inner tube 215 and the double-layer absorbable ligation clip 1 installed at the front end of the inner tube 215 are rotated to a suitable angle and maintained at this angle.

[0107] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A ligation device, characterized in that: The closure is secured to the outside of the jacket and is secured to the outside by a spring which secures the closure to the user. The closure is secured to the outside of the jacket and is secured to the outside by a spring which secures the closure to the user. The closure is secured to the outside of the jacket and is secured to the outside by a spring which secures the user The front end of the inner tube, the outer tube is slidably sleeved on the outside of the inner tube, the pushing mechanism is slidably sleeved on the outside of the elastic component limiting pile and the upper part of the fixing mechanism, and the front end of the pushing mechanism is connected to the rear end of the outer tube, the first elastic reset component is sleeved on the outside of the elastic component limiting pile, the pushing mechanism is used to push the outer tube to move forward relative to the inner tube, thereby causing the V-shaped opening to be retracted, and the first elastic reset component is used to reset the pushing mechanism and the outer tube; the excitation mechanism is hinged to the fixing mechanism, and the ejection mechanism is slidably installed in the elastic component limiting pile and the inner tube, the second elastic reset component is sleeved on the ejection mechanism and is located inside the elastic component limiting pile, the excitation mechanism is used to excite the ejection mechanism to move forward, thereby pushing the piston to move forward, and the second elastic reset component is used to reset the ejection mechanism.

2. The ligation device according to claim 1, characterized in that: The fixing mechanism includes a fixed handle and a fixed sleeve arranged on the upper part of the fixed handle, the elastic component limit pile is connected to the front end of the fixed sleeve, the excitation mechanism includes an excitation handle, the excitation handle is hinged to the fixed handle, the rear end of the ejection mechanism is located in the fixed sleeve, and a first strip opening is provided at the lower part of the fixed sleeve. The upper part of the excitation handle can pass through the first strip opening and extend into the fixed sleeve, thereby being able to excite the rear end of the ejection mechanism to move it forward.

3. The ligation device according to claim 2, characterized in that: The rear end of the inner tube is fixedly sleeved on the outside of the front end of the elastic component limiting pile, and the rear end of the inner tube is provided with a first annular limiting boss; the pushing mechanism includes an axial sleeve, a rotating wheel and a pushing sleeve, the front end of the axial sleeve is fixedly sleeved on the outside of the rear end of the outer tube, the front end of the rotating wheel is fixedly sleeved on the outside of the rear end of the axial sleeve, the axial sleeve gap is sleeved on the outside of the elastic component limiting pile, the rear end of the axial sleeve is connected to a second annular limiting boss, and the front and rear ends of the first elastic reset component respectively abut against the first annular shaped limiting boss and the second annular limiting boss; the front end and rear end of the pushing sleeve are respectively an open structure and a closed structure, and the lower part of the pushing sleeve is provided with a second strip opening for accommodating the upper end of the fixed handle, and the second strip opening passes through the front end of the pushing sleeve, and the pushing sleeve is slidably sleeved on the outside of the fixed sleeve, and the front end of the pushing sleeve abuts against the rear end of the rotating wheel, and a limiting axial strip hole is provided on the pushing sleeve, and a limiting component is provided on the fixed sleeve, and the limiting component extends into the limiting axial strip hole.

4. The ligation device according to claim 3, characterized in that: The elastic component limit pile is rotatably installed at the front end of the fixed sleeve, an axial slide groove is provided on the inner wall of the axial sleeve, the rear end of the inner tube extends to the outside of the outer tube and is provided with a sliding component, the sliding component is slidably installed in the axial slide groove, and can limit the circumferential movement of the inner tube and the axial sleeve, so that the axial sleeve can drive the inner tube to rotate synchronously.

5. The ligation device according to claim 4, characterized in that: The outer fixing sleeve at the front end of the fixing sleeve is provided with a first connecting sleeve, and an annular limiting plate is provided on the inner side of the front end of the first connecting sleeve, and there is a certain gap between the annular limiting plate and the front end surface of the fixing sleeve, and a plurality of ball grooves are sequentially provided on the front side of the annular limiting plate along the circumferential direction; the outer fixing sleeve at the rear end of the elastic component limiting pile is provided with a second connecting sleeve, and an annular mounting block and an annular protrusion are fixed on the second connecting sleeve from front to back, and the annular protrusion is located in the gap between the annular limiting plate and the front end surface of the fixing sleeve, and the annular A first annular groove is formed between the protrusion and the front end surface of the fixed sleeve, and a plurality of first balls are installed in the first annular groove. A second annular groove is formed between the annular protrusion and the annular limiting plate, and a plurality of second balls are installed in the second annular groove; the annular mounting block is located at the front end of the annular limiting plate, and an axial mounting groove is provided at the rear end of the annular mounting block, and a ball elastic connecting component is provided in the axial mounting groove, and the front and rear ends of the ball elastic connecting component are respectively connected to the front end surface of the axial mounting groove and the positioning ball, and the positioning ball can be snapped into any of the ball grooves.

6. The ligation device according to claim 4, characterized in that: The rear end of the elastic component limiting pile is rotatably mounted inside the front end of the fixed sleeve through a bearing, and the outside of the rear end of the elastic component limiting pile is provided with a plurality of tooth-shaped protrusions along the circumferential direction, thereby forming a plurality of tooth grooves arranged in sequence along the circumferential direction, and a glass bead spring is provided on the side wall of the fixed sleeve, and the positioning bead of the glass bead spring can be clamped in any of the tooth grooves.

7. The ligation device according to claim 1, characterized in that: The rear end of the elastic component limiting pile is an open structure, and the front end of the elastic component limiting pile is provided with an annular front end plate. The ejection mechanism includes a needle head, a needle rod and a needle tail connected in sequence from front to back. The rear end of the needle rod is located in the elastic component limiting pile, and the front part of the needle rod passes through the annular front end plate and extends into the inner tube. The second elastic reset component is sleeved on the needle rod, and the front and rear ends of the second elastic reset component respectively abut against the annular front end plate and the front end surface of the needle tail. The external fixed sleeve of the needle rod close to the needle head is provided with an annular positioning block, and the annular positioning block fits with the inner wall of the inner tube.

8. The ligation device according to claim 2, characterized in that: The locking mechanism further comprises a locking key and an elastic positioning assembly, wherein the locking key comprises an intermediate block, a first side block, a second side block and a locking block, the first side block and the second side block are respectively arranged on the left and right sides of the front of the intermediate block, the locking block is arranged on the side of the first side block close to the second side block, a limiting block is arranged on the outer side of the first side block, the first side block and the second side block can both move left and right in the locking key hole, the locking block can be inserted into the locking hole, and the rear end of the intermediate block The side is provided with two arc-shaped positioning grooves arranged in sequence from left to right, and the elastic positioning assembly includes a key marble, a marble elastic connecting component and a blocking block. A positioning mounting hole is provided on the handle body, one end of the positioning mounting hole is connected to the locking key hole, and the other end passes through the rear end of the handle body. The key marble and the marble elastic connecting component are arranged in the positioning mounting hole from front to back, and the blocking block can be removably installed at the rear end of the positioning mounting hole, and the key marble is connected to the blocking block through the marble elastic connecting component. The key marble can be clamped in any of the arc-shaped positioning grooves. When the key marble is clamped in the arc-shaped positioning groove close to the first side block, the locking block is inserted into the lock hole, so that the excitation handle and the fixed handle are relatively fixed. When the key marble is clamped in the arc-shaped positioning groove close to the second side block, the locking block leaves the lock hole, so that the excitation handle can rotate relative to the fixed handle.

9. The ligation device according to claim 1, characterized in that: The outer sleeve includes a rear end connecting portion and an intermediate portion arranged at the front end of the rear end connecting portion, and the front and rear ends of the rear end connecting portion and the intermediate portion are both open structures, and the rear end connecting portion can be detachably installed inside the front end of the inner tube; two elastic clamping arms are symmetrically arranged on the upper and lower sides of the front end of the intermediate portion, and the V-shaped opening portion is formed between the two elastic clamping arms, and each elastic clamping arm is provided with a strip groove for accommodating the inner layer clamp on one side close to the other elastic clamping arm; two extension arms are symmetrically arranged on the upper and lower sides of the front end of the outer tube, and each extension arm is used to retract an elastic clamping arm; Two elastic positioning arms are symmetrically arranged on the left and right sides of the middle part, each of the elastic positioning arms extends forward relative to the middle part, and a positioning hole is arranged at the front end of each elastic positioning arm; the inner layer clamp includes a fixing column and inner clamping arms symmetrically arranged on the upper and lower sides of the front end of the fixing column, each of the inner clamping arms is used to be set in one of the strip-shaped grooves, and the left and right ends of the fixing column are respectively used to be clamped in the two positioning holes of the two elastic positioning arms, and each of the inner clamping arms is sequentially provided with a plurality of through holes from front to back, and each inner clamping arm is provided with a side away from the other inner clamping arm. A guide groove extending from front to back; the outer layer clamp includes two outer clamping arms, the rear ends of the two outer clamping arms are connected, and each outer clamping arm is provided with a guide rail extending from front to back on one side close to the other outer clamping arm, and the guide rail is a stepped guide rail, and the distance between the front ends of the opposite surfaces of the two guide rails is smaller than the distance between the rear ends of the opposite surfaces of the two guide rails, and each guide rail is used to slide in a guide groove, and a clamping piece is provided at the front end of each guide rail, and each clamping piece is used to clamp in a through hole at the front end of one of the inner clamping arms, and each clamping piece is provided on both sides. There is a limiting piece, and a limiting groove is provided on the left and right sides of the upper and lower parts of the fixing column, and each of the limiting pieces is used to be installed in one of the limiting grooves; the piston includes a piston block and elastic positioning plates arranged on the upper and lower sides of the rear part of the piston block, and a positioning port is provided on the upper and lower sides of the rear end connecting part, and the rear end of each elastic positioning plate is used to be clamped in one of the positioning ports, and a limiting protrusion is provided on the front end of each elastic positioning arm close to the other elastic positioning arm, and the two limiting protrusions are used to limit the piston block to prevent the piston from falling out of the front end of the outer sleeve.

10. A method for using the ligation device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Install the rear end of the outer tube to the front end of the inner tube, and use the pushing mechanism to push the outer tube forward relative to the inner tube, thereby retracting the V-shaped opening so that the diameter of the V-shaped opening does not exceed the outer diameter of the outer tube; Step 2: The double-layer absorbable ligation clip and the front end of the clip applier are inserted into the area to be ligated in the human body through the puncture cannula, and the pushing mechanism is released. The first elastic reset component resets the pushing mechanism and the outer tube, so that the V-shaped opening opens to the initial state. Step 3: The tubular tissue to be closed is embedded in the V-shaped opening for containing, and then the ejection mechanism is activated by the activation mechanism to move forward, thereby pushing the piston forward, and then the piston pushes the outer clamp, and then the outer clamp bites and pushes out the inner clamp, and finally the outer clamp completely bites the inner clamp to close the tubular tissue, and then the outer clamp and the inner clamp are separated from the outer sleeve, the activation mechanism is released, and the ejection mechanism is reset under the action of the second elastic reset component; Step 4: Push the outer tube forward relative to the inner tube again by the pushing mechanism, thereby retracting the V-shaped opening, and withdrawing the double-layer absorbable ligation clip and the front end of the clip applier through the puncture cannula to the outside of the human body.

Images