Thread trimming assembly and thread trimming device
By setting multiple wire holes on the inner cylinder member of the thread-cutting device, it is ensured that the driving wire does not detach when shearing the stitching, which solves the problem of easy disengagement of the joints in the prior art, and achieves high reliability and stable thread-cutting effects.
Patent Information
- Application Number
- CN202422077311.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-23
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-08-23
AI Technical Summary
In existing wire-cutting devices, the joints of the drive wires are prone to break away from the limit hole, resulting in failure of wire-cutting operations, affecting the reliability and stability of the surgery.
A wire-cutting assembly is designed, with two wire holes on the inner cylinder member, and the driving wire penetrates the two wire holes to ensure that the filament is limited to the limit hole of the inner cylinder member during the shearing stitching process to avoid disengagement.
It improves the reliability of thread cutting operations and product stability, ensures that the suture can be cut reliably and reduces the risk of surgical failure.
Smart Images
Figure CN223111738U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of medical devices, and specifically, to a wire cutting assembly and a wire cutting device. Background Art
[0002] Endoscopic resection of gastrointestinal lesions is one of the most common surgeries in the digestive department at present, including techniques such as endoscopic mucosal resection (EMR) and endoscopic submucosal dissection (ESD). All resection methods may cause relatively large defects, thereby causing perforation or bleeding. Multiple studies have shown that selective prophylactic closure of resection defects can reduce the incidence of postoperative perforation and bleeding, which can be achieved through TTSC (through-the-scope clips), OTSC (over-the-scope clips), or endoscopic suturing.
[0003] TTSC is limited to repairing mucosal tissue, has low closing force, and requires multiple clips. OTSC can repair full-thickness gastrointestinal defects, but it has an unsatisfactory closure for defects larger than 20 mm or with inflamed or necrotic edges. In addition, OTSC requires removing the endoscope to install the OverStitch device and reinserting it into the target position, and it requires the use of a dual-channel endoscope and cannot be used in the right colon. Therefore, in such cases, an endoscopic stapling system is usually required to overcome these limitations.
[0004] The endoscopic stapling system generally includes a release device and a wire cutting device. The release device is used to implant a staple assembly into human tissue, and a suture is connected to the staple assembly. The wire cutting device is used to cut the suture to end the operation. The wire cutting device usually includes an inner cylinder member and an outer cylinder member. Tangent openings are provided on the inner cylinder member and the outer cylinder member, and the suture passes through the two tangent openings. When the suture needs to be cut, the operator needs to drive the inner cylinder member to move relative to the outer cylinder member through a driving wire to cut the suture. However, in the prior art, a limiting hole is usually provided on the inner cylinder member, and there is a joint at the end of the driving wire, which is clamped in the limiting hole through the joint. If the joint is too small, there is a risk that the joint will disengage from the limiting hole during the process of pulling the inner cylinder member, resulting in the failure of the wire cutting operation. Summary of the Utility Model
[0005] In order to solve one of the above technical defects, a wire cutting assembly and a wire cutting device are provided in the embodiments of the present application.
[0006] The present application provides the following technical solutions:
[0007] According to a first aspect of the present application, a wire cutting assembly is provided, including:
[0008] A thread fixing mechanism, the thread fixing mechanism comprising a first thread fixing member and a second thread fixing member, the first thread fixing member having a through suture groove, the second thread fixing member being connectable to the first thread fixing member to close the mouth of the suture groove;
[0009] A thread cutting mechanism, the thread cutting mechanism comprising an inner cylinder and an outer cylinder, the inner cylinder can be sleeved on the first thread fixing member, the inner cylinder has a first thread cutting opening and two thread holes, the outer cylinder is sleeved on the outside of the inner cylinder, and the outer cylinder has a second thread cutting opening;
[0010] A driving wire, wherein the driving wire has two filaments, one end of the two filaments is used to connect to the pulling end, and the other ends of the two filaments are connected, the two filaments are passed through the outer cylinder and the inner cylinder, and the two filaments are respectively passed through the two wire holes;
[0011] The thread cutting assembly has a pre-cutting state and a post-cutting state. In the pre-cutting state, the two filaments pass through the suture groove and are confined to the second thread fixing member. In the post-cutting state, the two filaments detach from the second thread fixing member and are confined to the two thread holes of the inner cylinder.
[0012] Optionally, the inner cylinder member includes a cylinder body and a limiting member;
[0013] The cylinder body has a cylinder cavity, the limiting member is accommodated in the cylinder cavity, the cylinder body restricts the limiting member from leaving the cylinder cavity, and the limiting member is provided with two wire holes;
[0014] The two filaments are inserted into the barrel cavity and pass through corresponding wire holes respectively.
[0015] Optionally, the cylinder body comprises a cylinder wall, one end of the cylinder wall is open, and an end plate is arranged at the other end, the open end of the cylinder wall can be sleeved on the first wire fixing member, and the end plate is provided with a through hole;
[0016] The two filaments respectively penetrate through the through holes on the end plate;
[0017] In the sheared state, the limiting member can be attached to the end plate.
[0018] Optionally, the limiting member is in sheet shape;
[0019] The wire hole penetrates the limiting member along the thickness direction of the limiting member.
[0020] Optionally, the limiting member is a disc body, and the outer diameter of the limiting member is smaller than the inner diameter of the cylinder wall and larger than the through hole on the end plate.
[0021] Optionally, the two filaments are a single piece.
[0022] Optionally, the second wire fixing member has a limiting groove;
[0023] The driving wire is bent to form an elbow, and the two filaments are respectively on both sides of the elbow;
[0024] Both of the two filaments penetrate through the limiting groove, and the elbow is limited at the notch of the limiting groove.
[0025] Optionally, the second wire fixing member has a receiving groove communicating with the limiting groove;
[0026] The limiting groove and the receiving groove cooperate to penetrate through the second wire fixing member. The inner diameter of the receiving groove is larger than that of the limiting groove, and the elbow is received in the receiving groove.
[0027] Optionally, the wire cutting assembly includes a plug, and the plug is detachably connected to the second wire fixing member to cover or open the notch of the receiving groove.
[0028] According to a second aspect of the present application, there is provided a wire cutting device, including:
[0029] A handle;
[0030] An elastic tube, one end of the elastic tube is connected to the handle;
[0031] The above-mentioned wire cutting assembly, and the outer cylinder member of the wire cutting assembly is connected to the other end of the elastic tube;
[0032] A cable, the cable is slidably disposed in the elastic tube, and one end of the cable is drivingly connected to the driving wire;
[0033] A slip ring, the slip ring is slidably disposed on the handle, and the slip ring is drivingly connected to the other end of the cable.
[0034] By adopting the above technical solutions, the present application has the following beneficial effects:
[0035] Two wire holes are provided on the inner cylinder member of the wire cutting assembly of the present application, and the driving wire is sequentially disposed through the two wire holes. During the process of cutting the suture, the filaments are limited on the two limiting holes and will not break away from the inner cylinder member, with high reliability and good product quality stability. Description of the Drawings
[0036] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:
[0037] Figure 1 A schematic diagram showing the wire cutting device provided by the embodiment of the present application is shown;
[0038] Figure 2Schematic diagram showing threading a sewing thread on a thread cutting assembly provided by an embodiment of the present application;
[0039] Figure 3 Cross-sectional view showing the thread cutting assembly provided by an embodiment of the present application in the pre-cutting state;
[0040] Figure 4 State diagram showing the thread fixing mechanism in the thread cutting assembly provided by an embodiment of the present application clamping the sewing thread;
[0041] Figure 5 State diagram showing the driving wire disengaging from the thread fixing mechanism in the thread cutting assembly provided by an embodiment of the present application;
[0042] Figure 6 State diagram showing the post-cutting state of the thread cutting assembly provided by an embodiment of the present application;
[0043] Figure 7 Schematic structural diagram of the outer cylinder member in the thread cutting assembly provided by an embodiment of the present application;
[0044] Figure 8 Schematic structural diagram of the inner cylinder member in the thread cutting assembly provided by an embodiment of the present application;
[0045] Figure 9 Schematic structural diagram of the first thread fixing member in the thread cutting assembly provided by an embodiment of the present application;
[0046] Figure 10 Schematic structural diagram of the second thread fixing member in the thread cutting assembly provided by an embodiment of the present application;
[0047] Figure 11 Schematic structural diagram of the limiting member in the thread cutting assembly provided by an embodiment of the present application. Detailed implementation manners
[0048] In order to make the technical solutions and advantages in the embodiments of the present application clearer and more understandable, the following further details the exemplary embodiments of the present application with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than an exhaustive list of all embodiments. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.
[0049] In the description of the present application and its embodiments, it should be understood that the orientation or positional relationships indicated by terms such as "top", "bottom", "height", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.
[0050] In this application and its embodiments, unless otherwise clearly specified and defined, terms such as "arranged", "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0051] In this application and its embodiments, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features between them. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.
[0052] See Figures 1 to 11 As shown, an embodiment of this application provides a wire cutting assembly 400, including: a wire fixing mechanism, a wire cutting mechanism 430, and a driving wire 440. The wire fixing mechanism includes a first wire fixing member 410 and a second wire fixing member 420. The first wire fixing member 410 has a through slot 411. The second wire fixing member 420 can be connected to the first wire fixing member 410 to close the opening of the slot 411. The wire cutting mechanism 430 includes an inner cylinder member 431 and an outer cylinder member 432. The inner cylinder member 431 can be sleeved on the first wire fixing member 410. The inner cylinder member 431 has a first wire cutting opening 43111 and two wire holes 43131. The outer cylinder member 432 is sleeved outside the inner cylinder member 431. The outer cylinder member 432 has a second wire cutting opening 4321. The driving wire 440 has two long wires 441. One ends of the two long wires 441 are used to connect to a pulling end, and the other ends of the two long wires 441 are connected. The two long wires 441 pass through the outer cylinder member 432 and the inner cylinder member 431, and the two long wires 441 are respectively arranged through the two wire holes 43131. The wire cutting assembly 400 has a pre-cut state and a post-cut state. In the pre-cut state, as Figure 2 shown, the two long wires 441 pass through the slot 411 and are limited by the second wire fixing member 420. In the post-cut state, as Figure 5 and Figure 10 shown, the two long wires 441 are separated from the second wire fixing member 420 and are limited on the two wire holes 43131 of the inner cylinder member 431.
[0053] In the pre-cut state, referring to Figure 2 and Figure 3 as shown, the first wire fixing member 410 and the second wire fixing member 420 are separated. The wire conduit 600 sequentially passes through the mouth of the wire slot 411, the first cutting port 43111 and the second cutting port 4321. The suture 500 is threaded through the wire conduit 600, and finally the wire conduit 600 is taken out. The suture 500 sequentially passes through the mouth of the wire slot 411, the first cutting port 43111 and the second cutting port 4321. When the suture 500 needs to be cut, the operator pulls the driving wire 440. The driving wire 440 first drives the second wire fixing member 420 to move to the first wire fixing member 410, so that the first wire fixing member 410 and the second wire fixing member 420 are connected and fixed, and the suture 500 is clamped and fixed, as Figure 4 shown. Continuing to pull the driving wire 440, the driving wire 440 will disengage from the second wire fixing member and be limited to the two wire holes 43131 of the inner cylinder member 431. Because the two filament ends of the driving wire 440 are connected and fixed, therefore, it will not easily disengage from the inner cylinder member 431, as Figure 5 shown. Under the driving action of the driving wire 440, referring to Figure 6 as shown, the inner cylinder member 431 slides relative to the outer cylinder member 432, and the first cutting port 43111 and the second cutting port 4321 cooperate to cut the suture. At this time, the wire fixing mechanism stays inside the human body with the suture 500. The outer cylinder member 432 is connected and fixed to the elastic tube 2 of the wire cutting device, and the inner cylinder member 431 and the outer cylinder member 432 are in clearance fit. After cutting the suture 500, the operator takes out the elastic tube 2 from the insertion channel of the endoscope to complete the operation.
[0054] Two wire holes 43131 are provided on the inner cylinder member 431 of the wire cutting assembly 400 of the present application. The driving wire 440 is arranged through the two wire holes 43131. During the process of cutting the suture 500, the filaments 441 are limited to the two limiting holes and will not disengage from the inner cylinder member 431, with high reliability and good product quality stability.
[0055] In some possible implementation manners, the inner cylinder member 431 includes a cylinder body. Two wire holes 43131 can be directly provided on the cylinder body, or the inner cylinder member 431 further includes a limiting member 4313, as Figure 3 and Figure 11 shown. The cylinder body has a cylinder cavity. The limiting member 4313 is accommodated in the cylinder cavity. The cylinder body restricts the limiting member 4313 from disengaging from the cylinder cavity. Two of the wire holes 43131 are provided on the limiting member 4313. The two filaments 441 are threaded through the cylinder cavity and respectively pass through the corresponding wire holes 43131.
[0056] Combined with Figure 3 and Figure 8As shown, the cylinder includes a cylinder wall 4311, one end of the cylinder wall 4311 is open, and the other end is provided with an end plate 4312, the open end of the cylinder wall 4311 can be sleeved on the first wire fixing member 410, the end plate 4312 is provided with a through hole 43121, and the two filaments 441 respectively pass through the through holes 43121 on the end plate 4312, after the driving wire 440 is separated from the second wire fixing member 420, it can drive the limiting member 4313 to move, so that the limiting member 4313 can fit the end plate 4312, so as to continue to pull the inner cylinder member 431.
[0057] In some possible implementations, see Figure 11 As shown, the limiting member 4313 is in sheet shape, and the line hole 43131 penetrates the limiting member 4313 along the thickness direction of the limiting member 4313 .
[0058] The stopper 4313 may be a disc, and the outer diameter of the stopper 4313 is smaller than the inner diameter of the cylinder wall 4311 and larger than the through hole 43121 on the end plate 4312. The stopper 4313 will not be separated from the cylinder through the through hole 43121.
[0059] The two filaments 441 are an integral piece. The filaments 441 pass through the two thread holes 43131 in sequence to form a double-filament structure.
[0060] The second wire fixing member 420 has a limiting groove 421, the driving wire 440 is bent to form an elbow 442, and the two sides of the elbow 442 are respectively two long wires 441, and the two long wires 441 both penetrate the limiting groove 421, and the elbow 442 is limited to the notch of the limiting groove 421. The elbow 442 is limited to the notch of the limiting groove 421. When the pulling force of the driving wire 440 is large enough, the elbow 442 of the driving wire 440 will be separated from the limiting groove 421.
[0061] In some possible implementations, the second wire fixing member 420 has a receiving groove 422 connected to the limiting groove 421, the limiting groove 421 and the receiving groove 422 cooperate to pass through the second wire fixing member 420, the inner diameter of the receiving groove 422 is larger than the inner diameter of the limiting groove 421, and the elbow 442 is accommodated in the receiving groove 422.
[0062] The wire cutting assembly 400 includes a plug 423 detachably connected to the second wire fixing member 420 to cover or open the notch of the accommodating groove 422 .
[0063] like Figure 1 and Figure 2As shown in the figure, the embodiment of the present application also provides a wire cutting device, including: a handle 1, an elastic tube 2, and the above-mentioned wire cutting assembly 400. One end of the elastic tube 2 is connected to the handle 1, the outer cylinder member 432 of the wire cutting assembly 400 is connected to the other end of the elastic tube 2, a cable is slidably disposed within the elastic tube 2, one end of the cable is drivingly connected to the drive wire 440, a sliding ring 5 is slidably disposed on the handle 1, and the sliding ring 5 is drivingly connected to the other end of the cable 4. The operator slides the sliding ring 5, causing the sliding ring 5 to move along the handle 1, thereby driving the drive wire 440 to move and perform a cutting action.
[0064] The above disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, components and settings of specific examples are described above. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.
[0065] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments as well as all changes and modifications falling within the scope of the present application.
[0066] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these changes and modifications.
Claims
1. A thread cutting assembly, characterized in that, Comprising: A wire fixing mechanism, the wire fixing mechanism includes a first wire fixing member and a second wire fixing member. The first wire fixing member has a through slot groove, and the second wire fixing member can be connected to the first wire fixing member to close the mouth of the slot groove. A wire cutting mechanism, the wire cutting mechanism includes an inner cylinder member and an outer cylinder member. The inner cylinder member can be sleeved on the first wire fixing member. The inner cylinder member has a first wire cutting opening and two wire holes. The outer cylinder member is sleeved outside the inner cylinder member, and the outer cylinder member has a second wire cutting opening. A driving wire, the driving wire has two long wires. One ends of the two long wires are used to connect to a pulling end, and the other ends of the two long wires are connected. The two long wires pass through the outer cylinder member and the inner cylinder member, and the two long wires respectively pass through the two wire holes. The wire cutting assembly has a pre-cutting state and a post-cutting state. In the pre-cutting state, the two long wires pass through the slot groove and are limited by the second wire fixing member. In the post-cutting state, the two long wires are separated from the second wire fixing member and are limited on the two wire holes of the inner cylinder member.
2. The wire cutting assembly according to claim 1, wherein The inner cylinder member includes a cylinder body and a limiting member. The cylinder body has a cylinder cavity, the limiting member is accommodated in the cylinder cavity, the cylinder body restricts the limiting member from detaching from the cylinder cavity, and two wire holes are provided on the limiting member. The two long wires pass through the cylinder cavity and respectively pass through the corresponding wire holes.
3. The wire cutting assembly according to claim 2, wherein The cylinder body includes a cylinder wall. One end of the cylinder wall is an open end, and the other end is provided with an end plate. The open end of the cylinder wall can be sleeved on the first wire fixing member, and the end plate is provided with a through hole. The two long wires respectively pass through the through holes on the end plate. In the post-cutting state, the limiting member can be attached to the end plate.
4. The wire cutting assembly according to claim 3, wherein, The limiting member is sheet-shaped. The wire holes penetrate the limiting member along the thickness direction of the limiting member.
5. The wire cutting assembly according to claim 3, wherein, The limiting member is a disc-shaped body, the outer diameter of the limiting member is smaller than the inner diameter of the cylinder wall and larger than the through hole on the end plate.
6. The wire cutting assembly according to claim 1, wherein, The two long wires are an integral part.
7. The wire cutting assembly according to claim 1, characterized in that, The second wire fixing member has a limiting groove. The driving wire is bent to form an elbow, and the two long wires are respectively on both sides of the elbow. Both of the two long wires pass through the limiting groove, and the elbow is limited at the notch of the limiting groove.
8. The wire cutting assembly according to claim 7, wherein, The second wire fixing member has a receiving groove communicating with the limiting groove. The limiting groove and the receiving groove cooperate to penetrate the second wire fixing member. The inner diameter of the receiving groove is larger than the inner diameter of the limiting groove, and the elbow is accommodated in the receiving groove.
9. The wire cutting assembly according to claim 8, wherein, Including a plug, the plug is detachably connected to the second wire fixing member to cover or open the notch of the receiving groove.
10. A thread cutting device, characterized in that, Comprising: A handle. An elastic tube, one end of the elastic tube is connected to the handle. The wire cutting assembly according to any one of claims 1-9, the outer cylinder member of the wire cutting assembly is connected to the other end of the elastic tube. A cable, the cable is slidably passed through the elastic tube, and one end of the cable is drivingly connected to the driving wire. A sliding ring, the sliding ring is slidably arranged on the handle, and the sliding ring is drivingly connected to the other end of the cable.