Single-thread fixing assembly and valve clamp operating device
By designing a single-strand wire fixing assembly, the contact area and friction between the strand wire and the claws is increased, the problem of easy breakage of the strand wire in the prior art is solved, and the operation accuracy and surgical efficiency of the heart valve clip are improved.
Patent Information
- Application Number
- CN202420290668.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-08
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-02-08
AI Technical Summary
The conveyor of the existing heart valve clip has a small contact area with the femoral wire, which leads to excessive force on the femoral wire, which can easily lead to the femoral wire being crushed and affects surgical operation.
Design a single-strand wire fixing assembly, by increasing the contact area between the fixing member and the jagged member, the inner surface of the jagged claws is used to form channels and concave and convex microstructures, thereby improving the contact area and friction between the jagged claws and the jagged claws, ensuring that Stable fixation and uniform stress of the strand wire.
Reduces the risk of wear and breakage and slippage of the femoral wire, improves the accuracy and efficiency of the implant during surgery, and ensures reliable opening and closing of the valve clip.
Smart Images
Figure CN222218020U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, in particular to a single-strand wire fixing component and a valve clip operating device. Background Art
[0002] Heart valves such as the mitral valve and tricuspid valve are one-way valves between the atria and ventricles. Normal and healthy valves can control the blood flow from the atria to the ventricles, while preventing blood from flowing from the ventricles to the atria. When the atria contract, the valve opens, and blood flows from the atria to the ventricles; when the ventricles contract, the valve should close to prevent blood from rushing to the atria. When the valve leaflets, chordae tendineae, annulus and other related structures are diseased, such as poor coaptation between the leaflets, then when the ventricles contract, the valve cannot be completely closed, causing blood to flow back from the ventricles to the atria, thereby causing a series of pathological and physiological changes.
[0003] The existing valve edge-to-edge repair system can be mainly divided into two parts: 1. The final implant valve clip; 2. The conveyor used to control and locate the position and status of the implant. The valve clip is an interventional treatment method used to repair the edge-to-edge connection of the heart valve clip. This treatment method is suitable for some patients with heart prolapse or regurgitation, which can relieve symptoms and improve heart function. The valve clip surgeon usually delivers the valve clip device into the patient's heart through a conveyor, and then the valve clip is placed at the edge-to-edge of the heart valve to fix the leaflets together and reduce the regurgitation of the valve. This can improve heart function and relieve symptoms while avoiding the trauma and recovery time of traditional open-chest surgery.
[0004] The existing conveyor conveys the valve clip through the strand, but the existing conveyor contacts the strand with a small contact area, so the conveyor exerts a large force on the strand. Since the diameter of the strand is small, the conveyor can easily break the strand, thereby affecting the entire surgical operation. Utility Model Content
[0005] The embodiments of the utility model provide a single-strand fixing assembly and a valve clamp operating device, which improves the uniformity of force on the wire by increasing the force-bearing area of the wire and the claws, and reduces the risk of the implant valve clamp being unable to open, close and release due to wire wear, breakage and slipping during surgery.
[0006] In a first aspect, an embodiment of the present invention provides a single-strand fixing assembly for fixing a strand of wire, comprising:
[0007] A fixing member, wherein the fixing member has a first opening and a second opening arranged along a preset direction, and a fixing cavity communicating with the first opening and the second opening;
[0008] A clamping member, wherein the clamping member is at least partially located in the fixing cavity, the clamping member moves along the preset direction relative to the fixing member, and the clamping member has a first state and a second state relative to the fixing member; the clamping member comprises at least two claws located in the fixing cavity, the at least two claws each having an inner surface, the inner surfaces corresponding to the at least two claws are formed with a channel for accommodating the strand, and the axial centerline direction of the channel is parallel to the preset direction;
[0009] When the clamp moves toward the first opening direction, at least two inner surfaces corresponding to the at least two claws approach each other until the clamp is in the first state, and the at least two inner surfaces are used for surface contact with the strand.
[0010] A single-strand wire fixing assembly provided by an embodiment of the utility model comprises a fixing member and a clamping member; the fixing member comprises a first opening, a second opening and a fixing cavity, the first opening and the second opening being connected through the fixing cavity; the clamping member is arranged in the fixing cavity movably along a preset direction, wherein the preset direction is from the first opening to the second opening, and the clamping member comprises at least two claws; a compression member is arranged at the second opening and connected to the clamping member; when the clamping member moves toward the first opening until it cannot move, the clamping member is in a first state, that is, the inner surfaces of the claws of the clamping member approach each other and gradually close together, the channel radially contracts to fix the wire, and holds the wire in the form of face-to-face contact, thereby increasing the force area between the wire and the inner surface of the claws, and improving the uniformity of the force on the core wire; so that when the clamping member is subjected to the same pressure, the friction between the core wire and the clamping member is increased, thereby reducing the breakage or slipping caused by the wear of the wire and the claws during the operation, thereby improving the accuracy of the implant operation controlled by the wire, improving the surgical efficiency, and saving the surgical time.
[0011] Optionally, at least one of the at least two inner surfaces is formed with a concave-convex microstructure to increase the friction coefficient.
[0012] Optionally, when the clamping member is in the second state relative to the fixing member, the channel for accommodating the wire strand is a tapered hole structure, and the channel has a first port and a second port arranged along the preset direction, the first port faces the first opening, the second port faces the second opening, and the area of the first port is larger than the area of the second port.
[0013] Optionally, along the preset direction, the length of the channel is 0.5 mm-10 mm, the diameter of the first port is 0.5 mm-5 mm, and the diameter of the second port is 0.3 mm-3 mm.
[0014] Optionally, the fixed cavity includes a first sub-cavity and a second sub-cavity, the first sub-cavity and the second sub-cavity are connected in a direction from the first opening to the second opening, and the diameter of the first sub-cavity is smaller than the diameter of the second sub-cavity;
[0015] The outer surface of the end of the claw is in an arc shape. When the connecting member is in the second state relative to the fixing member, the claw in the connecting member is completely located in the second sub-cavity; when the connecting member is in the first state relative to the fixing member, the end portion of the claw in the connecting member extends into the first sub-cavity, and the outer surface of the claw abuts against the inner wall of the first sub-cavity, and the inner wall of the first sub-cavity provides pressure on the ends of the claw to approach each other.
[0016] Optionally, the fixed cavity includes a first sub-cavity and a second sub-cavity, the first sub-cavity and the second sub-cavity are connected in a direction from the first opening to the second opening, and the diameter of the first sub-cavity is smaller than the diameter of the second sub-cavity;
[0017] The outer surface of the end of the claw is spiral. When the connecting member is in the second state relative to the fixing member, the claw in the connecting member is completely located in the second sub-cavity; when the connecting member is in the first state relative to the fixing member, the end portion of the claw in the connecting member extends into the first sub-cavity, and the outer surface of the claw abuts against the inner wall of the first sub-cavity. The inner wall of the first sub-cavity provides pressure on the end of the claw to approach each other, so as to increase the contact area between the inner surface of the claw and the strand.
[0018] Optionally, the number of the claws is 2-6.
[0019] Optionally, the outer surface of the clamping claw is provided with a gradient rib, and the inner wall of the fixing cavity is provided with a groove matching the gradient rib.
[0020] Optionally, the fixing member is threadedly connected to the clamping member near the second opening.
[0021] Optionally, a compression member is further included, and the compression member is arranged at the second opening to drive the clamping member to reciprocate along the preset direction relative to the fixing member.
[0022] Optionally, the compression member is threadedly connected to the clamping member;
[0023] Alternatively, the compression member is threadedly connected to the fixing member.
[0024] In a second aspect, an embodiment of the present utility model provides a valve clip operating device, comprising a strand of wire, a valve clip, and a single strand of wire fixing assembly as described in any one of the first aspects;
[0025] At least part of the strand extends into the single-strand fixing assembly and is relatively fixed to the single-strand fixing assembly. The strand at least partly extends out of the single-strand fixing assembly. The extended part of the strand is detachably connected to the valve clip. The strand is used to control the opening and closing of the valve clip.
[0026] The embodiment of the utility model provides a valve clip operating device, which controls the movement of the strands through a single-strand wire fixing component, and the part of the strands extending out of the single-strand wire fixing component is detachably connected to the valve. When the valve clip needs to be opened during surgery, the single-strand wire fixing component moves toward the direction of the valve clip to drive the strands to drive the valve clip to open. When the valve clip needs to be closed during surgery, the single-strand wire fixing component moves in a direction away from the valve clip as a whole, so that the strands drive the valve clip to close. When the surgery is completed, the valve clip needs to be released, and the rotating single-strand wire fixing component drives the strands to rotate, so that the strands extending out of the single-strand wire fixing component are separated from the valve clip, and the whole is withdrawn, leaving the valve clip in the body. Through the reliable connection between the strands and the single-strand wire fixing component, the risk of the implant valve clip being unable to open, close and release due to the wear and breakage of the core wire and slipping during surgery is reduced; and the precise control of the positioning and release process of the implant during the valve repair interventional treatment surgery is ensured. The conveyor makes the opening, closing and positioning adjustment of the valve clip more accurate and rapid during surgery, improves the surgical efficiency, and saves the surgical time. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. 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 creative work.
[0028] Figure 1 A schematic diagram of a single-strand wire fixing assembly provided in an embodiment of the utility model Figure 1 ;
[0029] Figure 2 For the corresponding Figure 1 A schematic diagram of the structure of the card connector;
[0030] Figure 3 A schematic diagram of a single-strand wire fixing assembly provided in an embodiment of the utility model Figure 2 ;
[0031] Figure 4 For the corresponding Figure 3 A schematic diagram of the structure of the clamping member and the compression member;
[0032] Figure 5 A schematic diagram of a single-strand wire fixing assembly provided in an embodiment of the utility model Figure 3 ;
[0033] Figure 6 For the corresponding Figure 5 A schematic diagram of the structure of the clamping member and the compression member;
[0034] Figure 7 An exploded view of a fixing member, a clamping member and a compression member of a single-strand wire fixing assembly provided in an embodiment of the utility model;
[0035] Figure 8 A schematic structural diagram of a clamping member in a single-strand wire fixing assembly provided by an embodiment of the utility model in a second state;
[0036] Fig. 9 A schematic structural diagram of a clamping member in a single-strand wire fixing assembly provided by an embodiment of the utility model in a first state;
[0037] Fig.10 For the corresponding Figure 8 Schematic diagram of the positions of the middle clamping piece and the strands;
[0038] Fig.11 For the corresponding Fig. 9 A schematic diagram of the positions of the clamping parts and the strands;
[0039] Fig.12 A cross-sectional view of a clamping member in a single-strand wire fixing assembly provided by an embodiment of the utility model;
[0040] Fig.13 It is a partial enlarged schematic diagram of the end of the clamping part;
[0041] Fig.14 Schematic diagram of the three-dimensional structure of the clamp Figure 1 ;
[0042] Fig.15 Schematic diagram of the three-dimensional structure of the clamp Figure 2 ;
[0043] Fig.16 Schematic diagram of the three-dimensional structure of the clamp Figure 3 ;
[0044] Fig.17 For fixings and Fig.16 A three-dimensional schematic diagram of the corresponding card connector installation structure;
[0045] Fig.18 For fixing parts Fig.16 A cross-sectional view of the corresponding card connector installation structure;
[0046] Fig.19 For the corresponding Fig.16 A side view of the card connector in FIG.
[0047] Fig. 20 For the corresponding Fig.19 A cross-sectional view at XX in FIG.
[0048] Fig.21 A schematic diagram of the distribution of three claws of a clamping member in a single-strand wire fixing assembly provided by an embodiment of the utility model;
[0049] Fig. 22 A schematic diagram of the distribution of four claws of a clamping member in a single-strand wire fixing assembly provided by an embodiment of the utility model;
[0050] Fig.23 A schematic diagram of the structure of a valve clip in a valve clip operating device provided by an embodiment of the utility model, in which the valve clip is in a closed state;
[0051] Fig.24 This is a schematic structural diagram of a valve clip in an open state in a valve clip operating device provided in an embodiment of the utility model.
[0052] Figure markings: A-single-strand fixing assembly; 1-fixing member; 11-fixing cavity; 111-first sub-cavity; 112-second sub-cavity; 12-first opening; 13-second opening; 14-groove; 15-blocking surface; 2-clamping member; 21-claw; 211-inner surface; 22-channel; 221-first port; 222-second port; 23-gradient rib; 24-limiting platform; 3-compression member; 4-valve clamp; 41-rotating axis; 5-strand; 6-thread structure. DETAILED DESCRIPTION
[0053] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0054] refer to Figure 1 , Figure 3 , Figure 5 , Figure 7In the first aspect, the embodiment of the utility model provides a single-strand fixing assembly A for fixing a strand of wire 5, comprising: a fixing member 1 and a clamping member 2; wherein the fixing member 1 has a first opening 12 and a second opening 13 arranged along a preset direction, and a fixing cavity 11 connecting the first opening 12 and the second opening 13; the fixing member 1 here is fixed on the conveyor handle, and the fixing cavity 11 inside the fixing member 1 is a variable cavity structure, and the fixing cavity 11 gradually becomes smaller in the radial direction from the proximal end to the distal end. The clamping member 2 is at least partially located in the fixing cavity 11, and the clamping member 2 moves along the preset direction relative to the fixing member 1, and the distal end of the fixing cavity 11 provides a space for compressing the clamping member 2. The clamping member 2 has a first state and a second state relative to the fixing member 1; the clamping member 2 includes at least two claws 21 located in the fixing cavity 11, and at least two claws 21 have an inner surface 211, and the inner surfaces 211 corresponding to the at least two claws 21 are formed with a channel 22 for accommodating the strand of wire 5, and the axial centerline direction of the channel 22 is parallel to the preset direction;
[0055] When the clamping member 2 moves toward the first opening 12, at least two inner surfaces 211 corresponding to at least two claws 21 approach each other until the clamping member 2 is in the first state. Fig. 9 As shown, the first state means that the clamping member 2 is located at the farthest end and is squeezed by the fixing cavity 11 of the fixing member 1, so that at least two inner surfaces 211 corresponding to at least two claws 21 are used for surface contact with the strand 5; Figure 8 As shown, the second state refers to that the clamping member 2 is located at the proximal end, and at least two inner surfaces 211 corresponding to at least two claws 21 are not in contact with the strand 5. Specifically, at least two claws 21 at the front end of the clamping member 2 form a channel 22, which can be radially deformed and contracted to press the strand 5 inserted therein.
[0056] For ease of understanding, the proximal end here refers to the side close to the handle operation, and the distal end refers to the side away from the handle operation.
[0057] The embodiment of the utility model provides a single-strand wire fixing assembly A, comprising a fixing member 1 and a clamping member 2; the fixing member 1 comprises a first opening 12, a second opening 13 and a fixing cavity 11, and the first opening 12 and the second opening 13 are connected through the fixing cavity 11; the clamping member 2 is arranged in the fixing cavity 11 and can be moved along a preset direction, where the preset direction is from the first opening 12 to the second opening 13, and the clamping member 2 comprises at least two claws 21; the compression member 3 is arranged at the second opening 13 and connected to the clamping member 2; when the clamping member 2 moves toward the first opening 12 until it cannot move, the clamping member 2 is in a state of being locked. The connector 2 is in the first state, that is, the inner surfaces 211 of the claws 21 of the connector 2 are gradually approaching each other, and the channel 22 radially contracts to fix the strand 5, and holds the strand 5 in the form of surface contact, thereby increasing the force-bearing area between the strand 5 and the inner surface 211 of the claws 21, and improving the uniformity of the force on the core wire; when the connector 2 is subjected to the same pressure, the friction between the core wire and the connector 2 is increased, thereby reducing the breakage or slipping caused by the wear of the strand 5 and the claws 21 during the operation, thereby improving the accuracy of the implant operation controlled by the strand 5, improving the surgical efficiency, and saving the surgical time.
[0058] Of course, in order to increase the friction between the core wire and the clamping member 2, at least one of the at least two inner surfaces 211 is formed with a concave-convex microstructure to increase the friction coefficient, or a concave-convex microstructure is formed on the outer surface of the strand 5 to increase the friction coefficient. For example, the concave-convex microstructure can be a finer texture or a frosted surface with a certain degree of roughness. As the contact area between the claw 21 and the strand 5 increases, the friction between the claw 21 and the strand 5 increases, the relative rotation risk is reduced, and it is more conducive to the release of the implant; as the contact area between the claw 21 and the strand 5 increases, under the premise of ensuring the friction between the claw 21 and the strand 5, the external force required for the compression member 3 to squeeze the clamping member 2 is reduced, thereby reducing the difficulty of the assembly process.
[0059] like Figure 1 As shown, please refer to Figure 2 , Figure 1 A schematic diagram of a single-strand wire fixing assembly A provided in an embodiment of the utility model Figure 1 ; Figure 2 For the corresponding Figure 1 Schematic diagram of the structure of the card connector 2; at this time, Figure 1 The strand 5 is not shown in the figure, the clamping member 2 is in the first state relative to the fixing member 1, and the clamping member 2 is threadedly connected to the fixing member 1. Specifically, the fixing member 1 is threadedly connected to the clamping member 2 near the second opening 13, that is, the clamping member 2 is rotated around the axis of the channel 22 to realize the movement of the clamping member 2 relative to the fixing member 1 along the preset direction. Figure 2 , Figure 2A limiting platform 24 is formed at one end of the clamping member 2 away from the claw 21. When the clamping member 2 rotates toward the first opening 12, the limiting platform 24 is used to limit the length of the movement path of the clamping member 2 to ensure accurate control of the movement range of the clamping member 2. A threaded structure 6 is provided at the position of the clamping member 2 close to the limiting platform 24. The threaded cooperation between the fixing member 1 and the clamping member 2 improves the stability of the movement of the clamping member 2 relative to the fixing member 1, and the extrusion force of the claw 21 of the clamping member 2 provided by the far end of the fixing member 1 is also more uniform. In addition, due to the threaded connection, the clamping member 2 and the fixing member 1 have a self-locking function, which effectively prevents the two from slipping, thereby ensuring that the inner surface 211 of the claw 21 is in stable contact with the strand 5.
[0060] like Figure 3 As shown, please refer to Figure 4 , Figure 3 A schematic diagram of a single-strand wire fixing assembly A provided in an embodiment of the utility model Figure 2 ; Figure 4 For the corresponding Figure 3 Structural schematic diagram of the clamping member 2 and the compression member 3 in the figure; the single-strand wire fixing assembly A provided by the embodiment of the utility model may also include a compression member 3, which is arranged at the second opening 13, driving the clamping member 2 to reciprocate along a preset direction relative to the fixing member 1, and the outer surface of the compression member 3 is provided with a threaded structure 6, and the fixing cavity 11 of the fixing member 1 is provided with a threaded structure 6 that cooperates with the compression member 3 thread near the second opening 13; the compression member 3 is axially moved by the threaded cooperation between the compression member 3 and the fixing cavity 11, so that the compression member 3 abuts against the clamping member 2, and provides an axial force in a preset direction to the clamping member 2 to squeeze the clamping member 2, thereby realizing the squeezing of the claw 21 of the clamping member 2, that is, the inner surfaces 211 of the claw 21 of the clamping member 2 approach each other and gradually close together, and the channel 22 radially contracts to fix the wire strand 5, and holds the wire strand 5 in the form of face-to-face contact, thereby increasing the force-bearing area between the wire strand 5 and the inner surface 211 of the claw 21, and improving the uniformity of the force on the core wire. Continue to refer to Figure 4 The fixed cavity 11 includes a first sub-cavity 111 and a second sub-cavity 112, and the first sub-cavity 111 and the second sub-cavity 112 are connected in the direction from the first opening 12 to the second opening 13, and the diameter of the first sub-cavity 111 is smaller than the diameter of the second sub-cavity 112; the end portion of the claw 21 in the clamping member 2 extends into the first sub-cavity 111, and the outer surface of the end of the claw 21 abuts against the inner wall of the first sub-cavity 111, and the inner wall of the first sub-cavity 111 provides pressure on the end of the claw 21 to approach each other.
[0061] like Figure 5 As shown, please refer to Figure 6 , Figure 5 A schematic diagram of a single-strand wire fixing assembly A provided in an embodiment of the utility model Figure 3 ; Figure 6 For the corresponding Figure 5 Structural schematic diagram of the clamping member 2 and the compression member 3 in the figure; the single-strand wire fixing assembly A provided by the embodiment of the utility model may also include a compression member 3, which is arranged in the second opening 13, driving the clamping member 2 to reciprocate along a preset direction relative to the fixing member 1, and the inner surface 211 of the compression member 3 is provided with a threaded structure 6, and the outer surface of the clamping member 2 is provided with a threaded structure 6 that cooperates with the thread of the compression member 3; the compression member 3 and the clamping member 2 move axially through the threaded cooperation, so that the compression member 3 pushes the clamping member 2 to move, thereby realizing the extrusion of the claws 21 of the clamping member 2, that is, the inner surfaces 211 of the claws 21 of the clamping member 2 gradually approach each other, and the channel 22 radially contracts to fix the wire strand 5, and holds the wire strand 5 in the form of face-to-face contact, thereby increasing the force-bearing area between the wire strand 5 and the inner surface 211 of the claws 21, and improving the uniformity of the force on the core wire. Continue to refer to Figure 4 The fixed cavity 11 includes a first sub-cavity 111 and a second sub-cavity 112, and the first sub-cavity 111 and the second sub-cavity 112 are connected in the direction from the first opening 12 to the second opening 13, and the diameter of the first sub-cavity 111 is smaller than the diameter of the second sub-cavity 112; the end portion of the claw 21 in the clamping member 2 extends into the first sub-cavity 111, and the outer surface of the end of the claw 21 abuts against the inner wall of the first sub-cavity 111, and the inner wall of the first sub-cavity 111 provides pressure on the end of the claw 21 to approach each other.
[0062] For easier understanding, refer to Figure 7 , Figure 7 An exploded view of a fixing member 1, a clamping member 2 and a compression member 3 of a single-strand wire fixing assembly A provided in an embodiment of the utility model; the clamping member 2 is placed into the fixing cavity 11 through the second opening 13 of the fixing member 1, and the fixing cavity 11 includes a first sub-cavity 111 and a second sub-cavity 112, and the first sub-cavity 111 and the second sub-cavity 112 are connected, and a blocking surface 14 is formed between the two sub-cavities for limiting the movement limit position of the clamping member 2 in the first state.
[0063] refer to Figure 8-Figure 11 When using a single-strand wire fixing assembly A of an embodiment of the utility model, Figure 8 and Fig.10 A structural schematic diagram of a single-strand wire fixing assembly A provided in an embodiment of the utility model, in which the clamping member 2 is in a second state; at this time, the compression member 3 and the clamping member 2 are both in the initial state, the compression member 3 does not apply force to the clamping member 2, and at this time, the inner surface 211 of the claw 21 of the clamping member 2 is not in complete contact with the wire strand 5. Fig. 9 and Fig.11A structural schematic diagram of a single-strand wire fixing assembly A provided in an embodiment of the utility model, in which a clamping member 2 is in a first state; at this time, the compression member 3 drives the clamping member 2 to move toward the distal end, and the inner surfaces 211 of the claws 21 of the clamping member 2 gradually approach each other, and the channel 22 radially contracts to fix the strand 5, and holds the strand 5 in a surface-to-surface contact form, thereby increasing the force-bearing area of the strand 5 and the inner surface 211 of the claws 21, and improving the uniformity of the force on the core wire; when the clamping member 2 is subjected to the same pressure, the friction between the core wire and the clamping member 2 is increased, thereby reducing the breakage or slipping caused by the wear of the strand 5 and the claws 21 during the operation, thereby improving the accuracy of the implant operation controlled by the strand 5, improving the surgical efficiency, and saving the surgical time.
[0064] like Fig.12 As shown, when the clamping member 2 is in the second state relative to the fixing member 1, the channel 22 for accommodating the strand 5 is a tapered hole structure, and the channel 22 has a first port 221 and a second port 222 arranged along a preset direction, the first port 221 faces the first opening 12, and the second port 222 faces the second opening 13, and the area of the first port 221 is larger than the area of the second port 222.
[0065] The front end of the clamping member 2 is designed to conform to a conical surface with a specific angle. When the compression member presses the clamping member 2, the front end claw 21 of the clamping member 2 contracts radially, and the inner surface 211 of the claw 21 is tightly attached to and presses the core wire.
[0066] like Fig.13 As shown, the specific structure of the channel 22 formed by the claw 21 is described. Along the preset direction, the length S of the channel 22 is 0.5mm-10mm, for example, S can be 0.5mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm or 10mm. The diameter D1 of the first port 221 of the channel 22 is 0.5mm-5mm, for example, D1 is 0.5mm, 1mm, 2mm, 3mm, 4mm or 5mm; the diameter D2 of the second port 222 is 0.3mm-3mm, for example, D2 is 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.5mm, 2mm, 2.5mm or 3mm. Since the shape of the channel 22 is a tapered hole structure, it is necessary to ensure that D1 is greater than D2, that is, when D1 is 0.5mm, D2 can be 0.3mm or 0.4mm. The above dimensions of D1 and D2 are only examples, and it will be OK as long as D1 is larger than D2.
[0067] like Fig.14 and Fig.15 , and refer to Figure 7 ,exist Fig.14The outer surface of the end of the middle claw 21 is in an arc shape. When the connecting member 2 is in the second state relative to the fixing member 1, the claw 21 in the connecting member 2 is completely located in the second sub-cavity 112; when the connecting member 2 is in the first state relative to the fixing member 1, the end portion of the claw 21 in the connecting member 2 extends into the first sub-cavity 111, and the outer surface of the end of the claw 21 abuts against the inner wall of the first sub-cavity 111, and the inner wall of the first sub-cavity 111 provides pressure on the ends of the claw 21 to approach each other.
[0068] exist Fig.15 The outer surface of the end of the middle claw 21 is spiral. When the connecting member 2 is in the second state relative to the fixing member 1, the claw 21 in the connecting member 2 is completely located in the second sub-cavity 112; when the connecting member 2 is in the first state relative to the fixing member 1, the end portion of the claw 21 in the connecting member 2 extends into the first sub-cavity 111, and the outer surface of the end of the claw 21 abuts against the inner wall of the first sub-cavity 111. The inner wall of the first sub-cavity 111 provides pressure on the end of the claw 21 to approach each other, so as to increase the contact area between the inner surface 211 of the claw 21 and the strand 5.
[0069] like Figure 16-Figure 20 As shown, the outer surface of the claw 21 is provided with a gradual rib 23, and the inner wall of the fixed cavity 11 is provided with a groove 14 that cooperates with the gradual rib 23. Specifically, the outer side of the claw 21 is provided with a gradual rib 23 along the axial direction, and the gradual rib 23 extends from the claw 21 toward the proximal end of the clamping member 2. By providing the gradual rib 23, the undesirable outward deformation of the middle part of the claw 21 is avoided when the claw 21 revolves along the axial direction. If the middle part of the claw 21 deforms outward, the outer surface of the claw 21 will contact the inner wall of the fixed cavity 11, causing the claw 21 to be stuck in the fixed cavity 11, causing a malfunction. Continue to refer to Fig.16 The height of the gradient rib 23 gradually increases from the distal end to the proximal end. Of course, the height of the gradient rib 23 may increase first and then remain at a fixed height, or may increase first and then remain at a fixed height and then gradually decrease. There is no limitation on the shape of the gradient rib 23. Fig.16 The one-piece structure shown in can also be a multi-stage structure.
[0070] In some specific embodiments, in order to adapt to the axial movement of the gradient rib 23 on the claw 21, a groove 14 adapted to the gradient rib 23 is provided on the fixing member 1, so that the gradient rib 23 can move in the axial direction. As the gradient rib 23 moves in the groove 14, the groove 14 radially compresses the gradient rib 23, so that the front section of the claw 21 is uniformly contracted radially.
[0071] In some specific embodiments, Fig.21 and Fig. 22In the embodiment, the number of the claws 21 is 2-6. For example, the number of the claws 21 can be 2, 3, 4, 5 or 6, preferably 3, more preferably 4, and can be set according to actual conditions. Of course, no matter how many the number of the claws 21 is, each claw 21 is evenly distributed in the circumferential direction to ensure that the pressure is uniform when the end of each claw 21 contacts the inner wall of the fixing member 1, thereby ensuring that the force on the inner surface 211 of the claw 21 when in contact with the strand 5 is more uniform, thereby improving the uniformity of the force on the core wire; when the clamping member 2 is subjected to the same pressure, the friction between the core wire and the clamping member 2 is increased, thereby reducing the breakage or slipping caused by the wear of the strand 5 and the claws 21 during the operation, thereby improving the accuracy of the implant operation controlled by the strand 5, improving the surgical efficiency, and saving the surgical time.
[0072] It can be understood that the threaded structure 6 mentioned above is only an example and can also be a sliding structure, such as the cooperation of a sliding groove and a sliding block.
[0073] Second, as Fig.23 and Fig.24 , a valve clip operating device provided by an embodiment of the utility model comprises a strand 5, a valve clip 4 and a single strand fixing assembly A of any one of the first aspects;
[0074] At least part of the strand 5 extends into the single-strand fixing component A and is relatively fixed to the single-strand fixing component A. At least part of the strand 5 extends out of the single-strand fixing component A. The extended part of the strand 5 is detachably connected to the valve clamp 4. The strand 5 is used to control the opening and closing of the valve clamp 4.
[0075] The embodiment of the utility model provides a valve clip operating device, which controls the movement of the strand 5 through the single-strand fixing component A, and the part of the strand 5 extending out of the single-strand fixing component A is detachably connected to the valve. When the valve clip 4 needs to be opened during surgery, the single-strand fixing component A moves toward the valve clip 4 to drive the strand 5 to drive the valve clip 4 to open. When the valve clip 4 needs to be closed during surgery, the single-strand fixing component A moves as a whole in a direction away from the valve clip 4, so that the strand 5 drives the valve clip 4 to close. When the surgery is completed, the valve clip 4 needs to be released, and the rotating single-strand fixing component A drives the strand 5 to rotate, so that the strand 5 extends out of the single-strand fixing component A and separates from the valve clip 4, and withdraws as a whole, leaving the valve clip 4 in the body. Through the reliable connection between the strand 5 and the single-strand fixing component A, the risk of the implant valve clip 4 being unable to open, close and release due to the wear and tear of the core wire and slipping during surgery is reduced; and the precise control of the positioning and release process of the implant during the valve repair interventional treatment surgery is ensured. The opening and closing and positioning adjustment of the valve clip 4 by the conveyor during the operation are made more accurate and rapid, thereby improving the operation efficiency and saving the operation time.
[0076] For ease of understanding, continue to refer to Fig.23 and Fig.24 , fix the fixing part 1 on the conveyor handle, the interior is a variable fixing cavity 11, and the distal end provides space for compressing the clamping part 2. A threaded structure 6 is provided on the inner wall of the fixing part 1; the claw 21 at the front end of the clamping part 2 can be radially deformed and contracted to press the strand 5 inserted therein; the compression part 3 is arranged at the second opening 13, and has a threaded structure 6 on the outside, and cooperates with the fixing cavity 11, and moves along a preset direction to squeeze the clamping part 2, so that the claw 21 at its front end is deformed to press the strand 5, and the strand 5 connects the handle and the implant. For example, the implant can be a valve clamp 4 with a rotating shaft 41. The strand 5 reciprocates along the preset direction to control the opening and closing of the valve clamp 4, and the rotational movement can release the valve clamp 4. The strand 5 passes through the fixing cavity 11, and the clamp 2 is placed in the fixing cavity 11. The compression member 3 is threadedly matched with the fixing cavity 11, or the compression member 3 can also be threadedly matched with the clamp 2, or there is no compression member 3, and the clamp 2 is threadedly matched with the fixing member 1; the clamp 2 is squeezed by rotating and then moved to the distal end, and the front end of the clamp 2 is squeezed by the fixing cavity 11 of the fixing member 1, and the claw 21 is radially contracted, and the inner surface 211 of the claw 21 slowly fits, squeezes and fixes the strand 5, and the position of the fixing member 1 is locked, so that the strand 5, the fixing member 1, and the compression member 3 become one. During the operation, the handle is used to move the fixing member 1 toward the proximal end, which will push the core wire to move toward the valve clamp 4, so that the two arms of the valve clamp 4 are opened to capture the leaflets. When the valve clamp 4 needs to be closed, the handle is used to move the fixing member 1 toward the distal end, and the strand 5 is pulled to reduce the angle of the two arms of the valve clamp 4. When the operation is completed, the valve clip 4 needs to be separated from the single-strand thread fixing assembly A, and the fixing part 1 is rotated to drive the strand 5 to rotate, so that the front end of the valve clip 4 is threadedly connected to the transmission shaft to release the thread connection until separation.
[0077] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.
[0078] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of this application and their equivalents, the present invention is also intended to include these modifications and variations.
Claims
1. A single-strand fixing assembly (A) for fixing a strand (5), characterized in that: include: A fixing member (1), the fixing member (1) comprising a first opening (12) and a second opening (13) arranged along a preset direction, and a fixing cavity (11) communicating with the first opening (12) and the second opening (13); A clamping member (2), wherein the clamping member (2) is at least partially located in the fixing cavity (11), the clamping member (2) moves relative to the fixing member (1) along the preset direction, and the clamping member (2) has a first state and a second state relative to the fixing member (1); the clamping member (2) comprises at least two claws (21) located in the fixing cavity (11), the at least two claws (21) each having an inner surface (211), the inner surfaces (211) corresponding to the at least two claws (21) forming a channel (22) for accommodating the strand (5), and the axial centerline direction of the channel (22) is parallel to the preset direction; When the clamping member (2) moves toward the first opening (12), the at least two inner surfaces (211) corresponding to the at least two claws (21) approach each other until the clamping member (2) is in the first state, and the at least two inner surfaces (211) are both used for surface contact with the strand (5).
2. The single-strand fixing assembly (A) according to claim 1, characterized in that: At least one inner surface (211) of the at least two inner surfaces (211) is formed with a concavo-convex microstructure to increase the friction coefficient.
3. The single-strand fixing assembly (A) according to claim 1, characterized in that: When the clamping member (2) is in the second state relative to the fixing member (1), the channel (22) for accommodating the strand (5) is a tapered hole structure, the channel (22) having a first port (221) and a second port (222) arranged along the preset direction, the first port (221) facing the first opening (12), the second port (222) facing the second opening (13), and the area of the first port (221) being larger than the area of the second port (222).
4. The single-strand fixing assembly (A) according to claim 3, characterized in that: Along the preset direction, the length of the channel (22) is 0.5 mm-10 mm, the diameter of the first port (221) is 0.5 mm-5 mm, and the diameter of the second port (222) is 0.3 mm-3 mm.
5. The single-strand fixing assembly (A) according to claim 1, characterized in that: The fixed cavity (11) comprises a first sub-cavity (111) and a second sub-cavity (112); the first sub-cavity (111) and the second sub-cavity (112) are connected in a direction from the first opening (12) to the second opening (13); and the diameter of the first sub-cavity (111) is smaller than the diameter of the second sub-cavity (112); The outer surface of the end of the clamping claw (21) is in an arc shape. When the clamping component (2) is in the second state relative to the fixing component (1), the clamping claw in the clamping component (2) is completely located in the second sub-cavity (112); when the clamping component (2) is in the first state relative to the fixing component (1), the end of the clamping claw (21) in the clamping component (2) partially extends into the first sub-cavity (111), and the outer surface of the clamping claw (21) abuts against the inner wall of the first sub-cavity (111), and the inner wall of the first sub-cavity (111) provides pressure for the ends of the clamping claw (21) to approach each other.
6. The single-strand fixing assembly (A) according to claim 1, characterized in that: The fixed cavity (11) comprises a first sub-cavity (111) and a second sub-cavity (112); the first sub-cavity (111) and the second sub-cavity (112) are connected in a direction from the first opening (12) to the second opening (13); and the diameter of the first sub-cavity (111) is smaller than the diameter of the second sub-cavity (112); The outer surface of the end of the clamping claw (21) is spiral-shaped. When the clamping member (2) is in the second state relative to the fixing member (1), the clamping claw (21) in the clamping member (2) is completely located in the second sub-cavity (112); when the clamping member (2) is in the first state relative to the fixing member (1), the end portion of the clamping claw (21) in the clamping member (2) extends into the first sub-cavity (111), and the outer surface of the clamping claw (21) abuts against the inner wall of the first sub-cavity (111). The inner wall of the first sub-cavity (111) provides pressure on the end of the clamping claw (21) to approach each other, so as to increase the contact area between the inner surface of the clamping claw (21) and the strand (5).
7. The single-strand fixing assembly (A) according to any one of claims 1 to 6, characterized in that: The number of the claws (21) is 2 to 6.
8. The single-strand fixing assembly (A) according to claim 1, characterized in that: The outer surface of the clamping claw (21) is provided with a gradual rib (23), and the inner wall of the fixing cavity (11) is provided with a groove (14) that matches the gradual rib (23).
9. The single-strand fixing assembly (A) according to claim 1, characterized in that: The fixing member (1) is threadably connected to the clamping member (2) near the second opening (13).
10. The single-strand fixing assembly (A) according to claim 1, characterized in that: It also comprises a compression member (3), wherein the compression member (3) is arranged at the second opening (13) and drives the clamping member (2) to move back and forth along the preset direction relative to the fixing member (1).
11. The monofilament fixing assembly (A) according to claim 10, characterized in that: The compression member (3) is threadedly connected to the clamping member (2); Alternatively, the compression member (3) is threadedly connected to the fixing member (1).
12. A valve clip operating device, characterized in that: It comprises a strand (5), a valve clip (4) and a single-strand fixing assembly (A) according to any one of claims 1 to 11; At least part of the strand (5) extends into the single-strand fixing component (A) and is fixed relative to the single-strand fixing component (A); at least part of the strand (5) extends out of the single-strand fixing component (A); the extended part of the strand (5) is detachably connected to the valve clip (4); and the strand (5) is used to control the opening and closing of the valve clip (4).