Hemostatic clip assembly

Abstract

The utility model provides a hemostatic clamp assembly relates to medical instrument technical field, including conveying mechanism and the hemostatic clamp of separable connection with conveying mechanism, the hemostatic clamp includes the clamping piece and base, wherein, the clamping piece includes the clamping piece main part along longitudinal extension and the installation structure of the longitudinal one end of clamping piece main part, and installation structure is used for installing in base, its characterized in that, the clamping piece main part is equipped with the locking structure for suture thread to pass through and can lock suture thread, wherein, under the non -locking state, locking structure can make suture thread pass through and move relative to the clamping piece main part, under the locking state, locking structure provides 0.1N~15N friction to suture thread, utilize the hemostatic clamp assembly in the utility model, can gather the hemostatic clamp one by one when the wound closure operation, avoid appearing the hemostatic clamp to collapse or to the situation of the collapse inside the wound, and the operation mode is simpler, can obviously improve the operation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a hemostatic clip assembly. Background Technology

[0002] With the development of endoscopic technology, endoscopic hemostasis has become the preferred method for treating gastrointestinal bleeding. Currently, commonly used endoscopic hemostasis methods include laser coagulation, electrocoagulation, local injection of hemostatic agents, drug spraying, and hemostatic clip closure. Among these, hemostatic clip closure has become the most effective and clinically valuable non-surgical treatment for gastrointestinal bleeding due to its minimal invasiveness, rapid hemostasis, low rebleeding rate, few complications, and definite efficacy.

[0003] Existing hemostatic clips are typically inserted into the human digestive tract through an endoscope. Because the size of the endoscope channel is limited, the outer diameter of the clip cannot be designed to be too large, resulting in a small clip opening size. This makes them suitable for hemostasis of small wounds. When hemostasis of large wounds is required, multiple clips need to be used in combination, and the clips need to be secured with sutures after being brought together, making the operation quite complex. Increasing the size of the clips to increase the applicable wound size would make it difficult for patients to excrete the clamping part of the clip through the digestive tract.

[0004] As can be seen from the publicly available information in existing literature (“Suturing techniques with endoscopic clips and special devices after endoscopic resection”, Tatsuma Nomura et al., Digestive Endoscopy, 2022), (e.g.) Figure 1 As shown in the diagram, in current clinical procedures using hemostatic clips to suture large wounds, the suture passes through the intersection of the two clip mounting structures at the proximal end of each clip. After the suture has passed through all the clips, the surgeon tightens the suture to close the wound. During the tightening process, due to the relative sliding between the clips and the suture, the suture's control over each clip is extremely weak. Therefore, some hemostatic clips may fall into the wound during tightening, requiring the surgeon to handle these fallen clips, thus increasing the difficulty of the procedure. Furthermore, because surgical sites are often complex, failure to detect fallen clips in time will significantly reduce surgical safety. In addition, due to differences in position and orientation, it is difficult to achieve uniform tightening force on each clip. Finally, to ensure complete wound closure, some clips may experience excessive tension and break off, further increasing the difficulty of the surgeon's operation and reducing surgical efficiency.

[0005] In addition, after tightening the hemostatic clip, the surgeon needs to cut the surgical sutures with an additional cutting instrument, which is cumbersome and reduces surgical efficiency. Utility Model Content

[0006] The purpose of this invention is to provide a hemostatic clip assembly to solve the problems existing in the prior art. During wound closure surgery, the hemostatic clips can be gathered one by one to avoid the hemostatic clips breaking off or falling into the wound. The operation method is simpler and can significantly improve surgical efficiency.

[0007] To achieve the above objectives, this utility model provides the following solution:

[0008] A hemostatic clip assembly includes a delivery mechanism and a hemostatic clip detachably connected to the delivery mechanism. The hemostatic clip includes a clip plate and a base. The clip plate includes a clip plate body extending longitudinally and a mounting structure connected to one longitudinal end of the clip plate body. The mounting structure is used for mounting to the base. The clip plate body is provided with a locking structure for a suture to pass through and for locking the suture. In the unlocked state, the locking structure allows the suture to pass through and move relative to the clip plate body. In the locked state, the locking structure provides a frictional force of 0.1N to 15N to the suture.

[0009] As one embodiment, the edge of the locking structure is provided with a cutting structure for cutting the suture, and the cutting edge of the cutting structure faces the side of the suture pulling direction, so that the suture does not contact the edge of the cutting edge in both the unlocked and locked states.

[0010] As one embodiment, the locking structure is a strip-shaped hole provided on the side wall of the clip body and extending longitudinally, and the cutting edge of the cutting structure is provided on the edge of the strip-shaped hole.

[0011] As one embodiment, along the longitudinal extension direction of the strip hole, the strip hole includes a threading area and a cutting area, and the cutting area is provided with the cutting edge.

[0012] As one embodiment, the longitudinal length of the cutting area is not greater than 1 / 2 of the longitudinal length of the strip hole.

[0013] In one embodiment, the cutting edge is distributed on one or two edges along the length of the strip hole, and the sidewall of the cutting edge near the strip hole is arranged parallel to the axial direction of the strip hole.

[0014] In one embodiment, the cutting edge is distributed on one or two edges along the length of the strip hole, and the sidewall of the cutting edge near the strip hole is inclined outward along the axial direction of the strip hole.

[0015] As one embodiment, the angle between the sidewall of the cutting edge near the strip hole and the axial direction of the strip hole is 0 to 90°.

[0016] As one embodiment, the clip body is also provided with a thread hole that communicates with the strip hole, and the maximum width of the thread hole is greater than the diameter of the suture thread.

[0017] As one embodiment, an outward-facing boss is also provided at the strip-shaped hole, and the cutting edge of the cutting structure is provided on the outward-facing boss.

[0018] This utility model also provides a hemostasis system, including the hemostatic clips and sutures described above. The hemostatic clip includes a base and a clip plate, and the mounting structure in the clip plate is connected to the base. The suture is used to pass through the locking structure. Multiple hemostatic clips are provided, and the suture passes through the strip hole. The suture and the hemostatic clip are locked together. Two hemostatic clips locked together are arranged adjacent to each other.

[0019] As one embodiment, the locking structure is a strip-shaped hole, the suture is a radially compressible soft thread, and the suture is interference-fitted with the strip-shaped hole.

[0020] In one embodiment, the locking structure is a strip-shaped hole, the suture is a radially incompressible rigid wire, the suture is clearance-fitted with the strip-shaped hole, and the suture is bent after passing through the strip-shaped hole so that the surface of the suture is in contact with the strip-shaped hole.

[0021] The present invention has the following technical advantages over the prior art:

[0022] This invention provides a locking structure on the clips, which can provide a frictional force of 0.1N to 15N to the suture, enabling rapid and reliable locking between the suture and the clips. Thus, during surgery, when closing a large wound, the surgeon can quickly and reliably lock the hemostatic clips one by one and ensure that all clips are in a closed and locked state when the wound is closed. Compared to existing methods of closing wounds using hemostatic clips, this invention allows for more uniform wound contraction and more even tension on the clips from the wound tissue. The clips do not collapse uncontrollably when locked, and are less prone to dislodgement or other undesirable situations, ensuring a firm and stable hold on the wound tissue. Furthermore, this method eliminates the need for sutures to gather and secure all the clips together, simplifying wound closure and effectively preventing the clips from collapsing during simultaneous gathering. This eliminates the need for surgeons to handle clip collapse or dislodgement during surgery, significantly improving surgical efficiency and safety.

[0023] This invention features a cutting structure at the edge of the locking structure. After the suture has tightened and locked the last hemostatic clip, the cutting structure at the edge of the locking structure can be used to remove excess suture, improving the convenience of cutting excess suture, reducing the use of auxiliary instruments, and thus further improving surgical efficiency.

[0024] The greatest technical challenge in designing the cutting structure of this invention lies in simultaneously ensuring that, in the locked state, the suture can reliably and securely lock with the locking structure of the clip, and during tightening, the cutting structure on the clip cannot accidentally cut the suture. Furthermore, it must allow the surgeon to quickly cut the suture using the cutting structure on the clip upon wound closure. Therefore, in this invention, the cutting edge of the cutting structure faces the direction in which the suture is pulled out, so that the suture does not contact the edge of the cutting edge in either the unlocked or locked state, thus effectively preventing accidental cutting of the suture during surgery.

[0025] Other technical solutions in this utility model also have the following technical effects:

[0026] This utility model also includes a threading structure connected to the locking structure. The maximum width of the threading structure is greater than the diameter of the suture, which reduces the friction between the threading structure and the suture, making it easier to thread the suture and also facilitating the relative movement of the hemostatic clip and the suture when tightening the suture. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This diagram illustrates the use of hemostatic clips and sutures in wound closure using existing technologies.

[0029] Figure 2 This is a schematic diagram illustrating the use of a hemostatic clip with suture locking function and a hemostatic system in wound closure according to one embodiment of the present invention.

[0030] Figure 3 This is a schematic diagram of the hemostatic clip in one embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the strip hole structure in one embodiment of the present invention;

[0032] Figure 5This is a schematic diagram of the strip hole structure in another embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram illustrating the cooperation between the strip hole and the threading structure in one embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram illustrating the cooperation between the strip hole and the threading structure in another embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram illustrating the gap fit between the strip hole and the suture line in one embodiment of the present invention;

[0036] Figure 9 This is a schematic diagram illustrating the interference fit between the strip hole and the suture line in one embodiment of the present invention;

[0037] Figure 10a This is a schematic diagram of a structure in one embodiment of the present invention, where the anti-detachment part is a barb;

[0038] Figure 10b This is a schematic diagram of a structure in one embodiment of the present invention where the anti-detachment part is a closed opening;

[0039] Figure 11 This is a schematic diagram of a structure with a cutting edge at the strip hole in one embodiment of the present invention;

[0040] Figure 12 This is a schematic diagram of a structure with a cutting edge at the strip hole in another embodiment of the present invention;

[0041] Figure 13 This is a schematic diagram of a structure with a cutting edge at the strip hole (the cutting edge is present on half the length of the edge of the strip hole) in another embodiment of the present invention;

[0042] Figure 14 This is a schematic diagram of a structure with an outwardly turned-up boss at the strip hole in another embodiment of the present invention;

[0043] Figure 15 This is a schematic diagram of the hemostatic clip assembly in one embodiment of the present invention;

[0044] Figure 16 This is a schematic diagram of the threading structure located in the middle of the strip hole in one embodiment of the present invention.

[0045] Explanation of reference numerals in the attached figures:

[0046] 1. Hemostatic clip; 2. Base; 3. Clip plate; 4. Clip plate body; 5. Mounting structure; 6. Strip hole; 7. Suture thread; 8. Thread hole; 9. Blade edge; 10. Outward-facing boss; 11. Connecting structure; 12. Anti-detachment part; 13. Conveying mechanism. Detailed Implementation

[0047] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0048] The purpose of this invention is to provide a hemostatic clip assembly to solve the problems existing in the prior art. During wound closure surgery, the hemostatic clips can be gathered one by one to avoid the hemostatic clips breaking off or falling into the wound. The operation method is simpler and can significantly improve surgical efficiency.

[0049] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0050] Example 1:

[0051] like Figures 2 to 13 , Figure 15 As shown, this embodiment provides a hemostatic clip assembly, which includes a delivery mechanism 13. Figure 15 (as shown) and a hemostatic clip 1 that is detachably connected to the delivery mechanism, the hemostatic clip 1 including a clip 3 and a base 2.

[0052] The clip 3 includes a clip body 4 extending longitudinally and a mounting structure 5 connected to one longitudinal end of the clip body 4. The mounting structure 5 is used for mounting to the base 2. Typically, two clips 3 are installed in one base 2, and the two clips 3 cooperate to clamp the wound tissue. The clip body 4 is provided with a locking structure for the suture 7 to pass through and lock the suture 7. In the unlocked state, the locking structure allows the suture 7 to pass through and move relative to the clip body 4. In the locked state, the locking structure provides a frictional force of 0.1N to 15N to the suture 7. The edge of the locking structure is provided with a cutting structure for cutting the suture 7. The cutting edge 9 of the cutting structure faces the side of the suture 7 in the pulling direction, so that the suture 7 does not contact the edge of the cutting edge 9 in both the unlocked and locked states.

[0053] The specific method for testing the frictional force of the locking structure on the suture 7 is as follows:

[0054] 1) Lay a biological tissue sample to be sutured, approximately 200mm x 200mm in size, flat on a horizontal test platform, and cut a circular wound with a diameter of approximately 20mm on its surface to serve as the test phantom;

[0055] 2) Prepare sutures of different materials, approximately 300 mm long and 0.1 mm to 0.55 mm in diameter, as test samples;

[0056] 3) Simulate intraoperative operation: take one end of the suture 7 and pass it through the locking structure at the distal end of the clip 3. Pull one end of the suture 7 so that the other end of the suture 7 remains in the position of the locking structure.

[0057] 4) Clamp the hemostatic clip 1 along one side of the wound on the phantom and then release the hemostatic clip 1;

[0058] 5) Fix the free end of the suture 7 (the end not locked by the hemostatic clip 1) to the digital push-pull force gauge. Pull the digital push-pull force gauge at a constant speed along the horizontal direction of the wound. Under the traction of the suture 7, the hemostatic clip 1 pulls the tissue on one side of the wound toward the tissue on the other side and abuts it (wound closed state). During this process, the hemostatic clip 1, under the traction of the suture 7, causes the tissue on one side of the wound to move a distance of not less than 20mm to the other side. Record the reading of the push-pull force gauge when the wound is completely closed, and record it as the test result of the locking friction force of the locking structure on the suture 7.

[0059] During the friction test experiment, the test samples at least included biological digestive samples (such as stomach tissue and intestinal tissue). The locking structure size, suture type 7, and suture size 7 were used as influencing factors for the friction test. An experimental verification scheme was designed, and the above experimental steps were used to record the locking friction force values ​​of the locking structure on the suture 7 under different influencing factors. Finally, it was found that under the friction force of 0.1N to 15N, the locking structure can effectively lock the suture 7 under different states and complete the effective closure of the wound.

[0060] Because the locking structure in this embodiment can provide a frictional force of 0.1N to 15N to the suture 7, it can maintain a locked state with the suture 7 without external force intervention, that is, keep the positions of the clip 3 and the suture 7 relatively fixed. In other words, when the suture 7 and the locking structure are moved to a designated position under the operation of the operator, and the operator removes the external force, the positions of the hemostatic clip 1 and the suture 7 can remain relatively fixed. A set of hemostatic clips 1 are arranged at intervals around the wound, and the suture 7 passes through the locking structure on the clip 3 in sequence. Each time the suture 7 passes through the locking structure of a clip 3, the surgeon pulls and tightens the suture 7. The locking structure on each clip 3 provides friction to lock the suture 7 relative to the clip 3. During this process, the hemostatic clip 1 moves to a designated position under the pull of the suture 7, so that the two hemostatic clips 1 are close together. During the movement of the hemostatic clip 1, the wound is contracted; after tightening the suture 7, because the locking structure can provide sufficient friction to the suture 7, the relative positions of the suture 7 and the hemostatic clip 1 are fixed. Then, using the same method, pass the suture 7 through the locking structure on the next clip 3, and tighten the suture 7 accordingly. Repeat this process, and the hemostatic clip 1 gradually becomes tighter, the wound is gradually contracted, and finally the large wound is closed.

[0061] This embodiment provides a locking structure on the clip 3, which can provide a frictional force of 0.1N to 15N to the suture 7, thereby achieving a fast and reliable locking between the suture 7 and the clip 3. Thus, during the operation, when closing a large wound, the surgeon can quickly and reliably lock the hemostatic clips 1 one by one and ensure that all the hemostatic clips 1 are in a converged and locked state when the wound is closed. Compared to existing methods of closing wounds using hemostatic clips 1, this invention allows each hemostatic clip 1 to experience uniform force relative to the suture 7 during the entire wound contraction process. The tension of the wound tissue on the hemostatic clip 1 is also relatively uniform. When locked, each hemostatic clip 1 is independently constrained by the suture 7, effectively preventing it from collapsing into the wound and reducing the likelihood of dislodgement. This ensures a firm and stable clamping of the wound tissue. Furthermore, this invention eliminates the need to gather and secure all the hemostatic clips 1 with the suture 7, saving the time of tightening the suture 7 with auxiliary instruments, simplifying wound closure, and effectively preventing the clips from collapsing into the wound during simultaneous gathering. This eliminates the need for the surgeon to handle unexpected situations such as clip collapse or dislodgement, significantly improving surgical efficiency and safety.

[0062] In addition, this embodiment has a cutting structure on the edge of the locking structure. After the suture 7 has tightened and locked the last hemostatic clip 1, the excess suture 7 can be cut off by using the cutting structure on the edge of the locking structure, which improves the convenience of cutting the excess suture 7, reduces the use of auxiliary instruments, and thus helps to further improve surgical efficiency. Moreover, the cutting edge 9 of the cutting structure faces the side of the suture 7 in the direction of pulling out, so that the suture 7 does not come into contact with the edge of the cutting edge 9 in both the unlocked and locked states, thus avoiding accidental cutting of the suture 7.

[0063] As one implementation, in the locked state, the locking structure provides a frictional force of 0.3N to 9N to the suture 7. Within this range, it can ensure that the suture 7 is not easily dislodged from the locking structure, thus preventing locking failure, and also ensure that the operator can apply a certain force to pull the suture 7 out smoothly, without causing problems such as difficulty in pulling the suture 7 and difficulty in performing the operation due to excessive friction between the suture 7 and the locking structure.

[0064] In this embodiment, the locking structure is a strip-shaped hole 6 located on the side wall of the clamp body 4 and extending longitudinally. The cutting edge 9 of the cutting structure is located on the edge of the strip-shaped hole 6, as shown in Figure 10. Figure 13 As shown, the cutting edge 9 can be formed directly on the edge of the strip hole 6. The locking structure can also be other structural forms, such as a circular through hole, an irregularly shaped through hole, or other irregularly shaped structures. In one specific embodiment, the centerline of the strip hole 6 is collinear with the centerline of the clamping body 4 in the longitudinal extension direction. The strip hole 6 can be a strip shape with uniform width, and both ends of the strip hole 6 have arc structures, such as... Figure 5 As shown, the strip hole 6 can also be other shapes, such as... Figure 4 As shown. A frictional force of 0.1N to 15N can be generated between the slot 6 and the suture 7 to achieve relative fixation of the clip 3 and the suture 7. The fit between the slot 6 and the suture 7 varies depending on the type of suture 7.

[0065] When the selected suture 7 is relatively soft and is a radially compressible material, such as silk or catgut, the suture 7 is interference-fitted with the slotted hole 6. Figure 8As shown. Specifically, the width of the strip hole 6 is 0.10mm to 0.50mm, preferably 0.25mm to 0.35mm, and most preferably 0.3mm; the length of the strip hole 6 is 0.5mm to 5mm, preferably 1.2mm to 1.5mm, and most preferably 1.3mm; the diameter of the suture 7 is 0.10mm to 0.50mm, preferably 0.3mm to 0.4mm, and most preferably 0.35mm. After the suture 7 passes through the strip hole 6, the two longitudinal edges of the suture hole 6 laterally compress and deform the suture 7 (where longitudinal refers to the direction of extension from the proximal end to the distal end of the hemostatic clip 1, and lateral refers to the direction of extension from one side of the suture hole 6 to the other side and perpendicular to the longitudinal direction), thereby generating a frictional force of 0.1N to 15N, preferably not less than 0.3N, and fixing the relative position of the suture 7 and the hemostatic clip 1 through this frictional force. However, when the staff applies an external force along the axial direction of the slot 6 to the hemostatic clip 1 or the suture 7, the hemostatic clip 1 and the suture 7 can be displaced relative to each other, so as to achieve the purpose of threading the suture and gathering the hemostatic clip 1 in the slot 6; after the external force is removed, the suture 7 and the hemostatic clip 1 can maintain their relative positions based on the friction provided by the slot 6.

[0066] When the selected suture 7 is relatively stiff and radially incompressible, such as nylon suture, the suture 7 fits snugly with the slotted hole 6, such as... Figure 9 As shown. Specifically, the width of the strip hole 6 is 0.10mm to 0.50mm, preferably 0.25mm to 0.35mm, most preferably 0.3mm; the length is 0.5mm to 5mm, preferably 1.2mm to 1.5mm, most preferably 1.3mm; the diameter of the suture 7 is 0.08mm to 0.45mm, preferably 0.21mm to 0.27mm, most preferably 0.23mm; and the clearance between the diameter of the suture 7 and one side of the strip hole 6 is between 0.02mm and 0.04mm. Because the material of the suture 7 is relatively hard, a certain assembly gap is required for the suture 7 to pass through the strip hole 6 of the clip 3. Although there is a gap between the suture 7 and the strip hole 6, the gap size is small. Under the premise of ensuring that the suture 7 can pass through the strip hole 6, when the hemostatic clip actually closes the wound, since the hemostatic clip is arranged along the circumference of the wound, the suture and the strip hole 6 in the hemostatic clip are not arranged completely parallel. Therefore, after the suture 7 passes through the strip hole 6, there will be a certain twisting and bending between it and the strip hole 6. At this time, the strip hole 6 will also generate a frictional force of 0.1N to 15N on the suture 7, thereby completing the effective locking of the suture 7.

[0067] In this embodiment, along the longitudinal extension direction of the strip hole 6, the strip hole 6 includes a threading area and a cutting area, such as... Figure 12 As shown, the edge of the cutting area is provided with a cutting edge 9. In this embodiment, the longitudinal length of the cutting area is not greater than 1 / 2 of the longitudinal length of the strip hole 6.

[0068] As another structure, the cutting edges 9 are arranged in a ring shape, and the sidewalls of the cutting edges 9 are arranged along the axial direction of the strip-shaped holes 6, such as... Figure 12 As shown, the sidewall of the cutting edge 9 is inclined outward (with the center of the strip hole 6 as the inner side), with an inclination angle not exceeding 90°. This facilitates cutting the suture 7 while preventing accidental cutting. The biggest technical challenge in designing the cutting edge 9 in this embodiment is to ensure that, in the locked state, the suture 7 can be reliably and securely locked with the locking structure of the clip 3, and that the cutting edge 9 on the clip 3 does not accidentally cut the suture 7 during tightening. Simultaneously, it must allow the surgeon to quickly cut the suture 7 using the cutting edge 9 on the clip 3 upon wound closure. Therefore, in this embodiment, the cutting edge 9 is inclined outward along the axial direction of the clip 3, i.e., towards the direction in which the suture 7 is pulled out. This ensures that the suture 7 does not contact the edge of the cutting edge 9 in both the unlocked and locked states, effectively preventing accidental cutting of the suture 7 during surgery.

[0069] In addition, such as Figure 14 As shown, in this embodiment, an outwardly turned protrusion 10 is also provided at the strip hole 6, and the cutting edge 9 is provided on the outwardly turned protrusion 10, so that the cutting edge 9 protrudes from the outer surface of the clip 3, further ensuring that in the event of accidental cutting of the suture 7, the cutting action can be completed more conveniently according to the needs of the operation under effective locking.

[0070] As friction increases, the locking ability strengthens, but the difficulty of moving the suture 7 relative to the locking structure also increases accordingly. To facilitate the suture 7 passing through the locking structure of the clip body 4, it is preferable to provide a threading structure on the clip body 4. This threading structure can be a through hole, and the through hole is at least partially arc-shaped in the circumferential direction. As a preferred embodiment, such as... Figure 6 , Figure 7 As shown, in this embodiment, the threading hole 8 on the clip body 4 is a near-circular through-hole structure, which facilitates matching with the cross-section of the suture 7. The maximum width of the threading hole 8 is greater than the diameter of the suture 7. The threading hole 8 transitions to the strip hole 6 via the connecting structure 11, allowing the threading hole 8 and the strip hole 6 to communicate. The connecting structure allows the suture 7 to move from the threading hole 8 into the strip hole 6 and lock in place. In use, the suture 7 is inserted through the threading hole 8. Because the maximum width of the threading hole 8 is greater than the diameter of the suture 7, the friction between the threading hole 8 and the suture 7 is small, facilitating threading and also facilitating the relative movement of the hemostatic clip 1 and the suture 7 when tightening the suture 7. After the hemostatic clip 1 is in place, the surgeon pulls the suture 7, causing the suture 7 to enter the strip hole 6 from the threading hole 8 through the connecting structure 11, thus locking the suture 7 and ensuring that the relative position of the suture 7 and the hemostatic clip 1 is fixed.

[0071] In this embodiment, the threading hole 8 is located at the longitudinal end (proximal and / or distal end) of the strip hole 6, or it can be located in the middle of the strip hole 6 (e.g., Figure 16 As shown). Figure 7 As shown, in this embodiment, the threading hole 8 is located near the end of the longitudinal direction of the strip hole 6, that is, close to the clamp mounting structure 5. The specific structural form of the threading hole 8 can be a circular hole, a square hole, or other irregular shapes. As mentioned above, the strip hole 6 can be a strip shape with uniform width, or it can be a shape with a gradually changing width along the extension direction, such as... Figure 4 As shown, the width of the slot 6 decreases the further away from the mounting structure 5, and its overall shape is trapezoidal or teardrop-shaped. If the threading hole 8 is located on the slot 6 near the mounting structure 5 and is connected to the slot 6, and if the threading hole 8 is also trapezoidal, and the width of the smaller diameter end of the threading hole 8 is the same as the width of the larger diameter section of the slot 6, then the threading hole 8 and the slot 6 are connected to form a slotted strip (see also [reference]). Figure 4 However, in terms of function, it can still be distinguished into a threading hole 8 and a strip hole 6 with a locking function.

[0072] In this embodiment, an anti-detachment part 12 is provided on the wall of the connecting structure 11 in the communication direction between the thread hole 8 and the strip hole 6. The anti-detachment part is used to prevent the suture 7 from moving from the strip hole 6 into the thread hole 8. Figure 10a As shown, in this embodiment, the anti-detachment part is a barb extending toward the strip-shaped hole 6; or, as... Figure 10b The anti-detachment part shown is an arc-shaped (or semi-arc-shaped, matching the structure according to the width of the strip hole 6 and the size and type of the suture 7) closing structure with a minimum width smaller than the maximum width of the strip hole 6. When the anti-detachment part 12 is a barb, it can be set on one or both walls of the connecting structure 11 in the longitudinal direction. This allows the suture 7 to enter the strip hole 6 through the threading hole 8, but makes it difficult for it to retract from the strip hole 6 back into the threading hole 8, thus preventing the suture 7 from retracting into the threading hole 8 under external force, which would cause the locking state with the hemostatic clip 1 to fail.

[0073] The anti-loosening part can work well with the radially compressible flexible suture 7. When the suture 7 passes through the anti-loosening part under the operation of the staff, it is compressed and then moved into the strip hole 6. However, it is difficult to return from the strip hole 6 to the thread hole 8 under a small external force, thus ensuring that the suture 7 is locked with the hemostatic clip 1.

[0074] like Figure 15 As shown, the delivery mechanism 13 in the hemostatic clip assembly of this embodiment may include an outer tube, a pull cable, a handle, and other structures. During operation, the handle can be used to control the opening and closing of the clip 3, clamping the tissue and closing the wound. The delivery mechanism 13 in this utility model can adopt a conventional device, and this embodiment will not elaborate on its specific structure.

[0075] Example 2:

[0076] This embodiment provides a hemostasis system, including the hemostasis clip assembly and suture 7 from embodiment 1. The hemostasis clip 1 includes a base 2 and a clip 3. The clip 3 includes a clip body 4 and a mounting structure 5 connected to the clip body 4. The mounting structure 5 is connected to the base 2. The suture 7 is used to pass through the locking structure. Multiple hemostasis clips 1 are provided. The suture 7 passes through the strip hole 6. The suture 7 and the hemostasis clip 1 are locked. Two hemostasis clips 1 in the locked state are arranged adjacent to each other.

[0077] In this embodiment, the locking structure is a strip-shaped hole 6.

[0078] In this embodiment, the suture 7 is a radially compressible soft suture. The suture 7 is interference-fitted with the strip hole 6. The longitudinal edges of the strip hole 6 are used to clamp the suture 7 and apply a frictional force of 0.1N to 15N to fix the relative position of the suture 7 and the hemostatic clip 1.

[0079] In this embodiment, the suture 7 is a radially incompressible rigid suture. The suture 7 is fitted with the strip hole 6 with a clearance. After the suture 7 passes through the strip hole 6, it is bent so that the surface of the suture 7 is in contact with the inner wall of the strip hole 6. The longitudinal edges of the strip hole 6 apply a frictional force of 0.1N to 15N to the suture 7, thereby fixing the relative position of the suture 7 and the hemostatic clip 1.

[0080] Any adaptive changes made according to actual needs are within the protection scope of this utility model.

[0081] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A hemostatic clip assembly, comprising a delivery mechanism and a hemostatic clip detachably connected to the delivery mechanism, the hemostatic clip including a clip and a base, wherein, The clip includes a clip body extending longitudinally and a mounting structure connected to one longitudinal end of the clip body, the mounting structure being used for mounting to a base; characterized in that, The clip body is provided with a locking structure for the suture to pass through and to lock the suture. In the unlocked state, the locking structure allows the suture to pass through and move relative to the clip body. In the locked state, the locking structure provides a frictional force of 0.1N to 15N to the suture.

2. The hemostatic clip assembly according to claim 1, characterized in that, The locking structure has a cutting structure on its edge for cutting the suture, with the cutting edge of the cutting structure facing the side in which the suture is pulled out.

3. The hemostatic clip assembly according to claim 2, characterized in that, The locking structure is a strip-shaped hole provided on the side wall of the clamp body and extending longitudinally, and the cutting edge of the cutting structure is provided on the edge of the strip-shaped hole.

4. The hemostatic clip assembly according to claim 3, characterized in that, Along the longitudinal extension direction of the strip hole, the strip hole includes a threading area and a cutting area, and the cutting area is provided with the cutting edge.

5. The hemostatic clip assembly according to claim 4, characterized in that, The longitudinal length of the cutting area is no greater than 1 / 2 of the longitudinal length of the strip hole.

6. The hemostatic clip assembly according to any one of claims 3 to 5, characterized in that, The cutting edge is distributed on one or two edges along the length of the strip hole, and the sidewall of the cutting edge near the strip hole is arranged parallel to the axial direction of the strip hole.

7. The hemostatic clip assembly according to any one of claims 3 to 5, characterized in that, The cutting edge is distributed on one or two edges along the length of the strip hole, and the sidewall of the cutting edge near the strip hole is inclined outward along the axial direction of the strip hole.

8. The hemostatic clip assembly according to claim 6, characterized in that, The angle between the sidewall of the cutting edge near the strip hole and the axial direction of the strip hole is 0~90°.

9. The hemostatic clip assembly according to claim 3, characterized in that, The clip body is also provided with a thread hole that communicates with the strip hole, and the maximum width of the thread hole is greater than the diameter of the suture thread.

10. The hemostatic clip assembly according to claim 3, characterized in that, An outward-facing boss is also provided at the strip-shaped hole, and the cutting edge of the cutting structure is provided on the outward-facing boss.

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