WO2021136167A1

WO2021136167A1 - Guidewire locking system and guidewire locking apparatus

Info

Publication number: WO2021136167A1
Application number: PCT/CN2020/140144
Authority: WO
Inventors: 高国庆; 王永胜
Original assignee: 杭州诺茂医疗科技有限公司
Priority date: 2019-12-30
Filing date: 2020-12-28
Publication date: 2021-07-08

Abstract

A guidewire locking system (20), said guidewire locking system (20) comprising a transporting assembly (26) and a locking piece (22). The locking piece (22) is arranged on the transporting assembly (26) and used for insertion into an inner cavity (502) of a guidewire (500). The transporting assembly (26) is used to adjust the radial dimensions of the locking piece (22) so as to cause the locking piece (22) to be in close contact with an inner wall of the guidewire (500), and is able to drive synchronous motion of the guidewire (500). Further provided in the present invention is a guidewire locking apparatus (100) for the describe guidewire locking system (20).

Description

Wire locking system and wire locking device

Technical field

This application relates to the technical field of interventional medical devices, and in particular to a wire locking device for locking an electrode wire implanted in a patient's body for a long time, and a wire locking system in the wire locking device.

Background technique

Various medical treatments and surgical procedures require the implantation of elongated structures in the bodies of human or livestock patients. Such elongated structures can include catheters, sheaths, cardiac electrical leads (such as pacemaker leads or defibrillator leads), and a variety of other devices. Among them, the pacemaker is usually implanted in the subcutaneous tissue pocket in the chest wall of the patient, and the multiple wires of the pacemaker extend from the pacemaker to the chamber of the patient's heart through the vein; the defibrillator wire can be fixed in the heart Internal or external.

Due to reasons such as infection, lifespan, and malfunction of the elongated structure, the implanted elongated structure needs to be removed from the patient's body. However, after the slender structure is implanted in the patient, due to the long use time, the fibrous tissue that is close to the heart itself or the vein wall or other surrounding tissues will adhere to the surface of the slender structure and grow, and even surround the slender structure, especially in This happens in areas where blood flow is slow. The fibrous tissue is very tough, making it difficult to remove the elongated structure from the area without causing damage to the area.

The current slender structure extraction technology involves the use of a wire locking device to assist in completion. The wire locking device generally includes a handle and a wire locking system. The expandable coil in the wire locking system can be selectively in two states, such as In the first state and the second state, the radial dimension of the expandable coil in the second state is greater than the radial dimension in the first state. In the first state, the surgeon delivers the wire locking system in the lumen of the implanted elongated structure; when the distal end of the wire locking system reaches the desired position (such as the distal end of the wire), the surgeon controls the expandable coil to switch to In the second state, the expandable coil is expanded radially to be fixed on the inner wall of the elongated structure, which facilitates the surgeon to pull the handle of the wire locking device and move it toward the proximal end to drive and withdraw the wire.

However, the position of implanting the elongated structure in the vasculature of different patients is different. In the actual operation process, because the expandable coil expands in the radial direction, there are only two kinds of contraction and expansion states, that is, the first mentioned above. The state and the second state, therefore, the existing expandable coils have limited choices of radial dimensions, which leads to the failure of the inflatable coils in some operations due to the failure of the locking effect of the expandable coils.

Summary of the invention

In view of this, the present application provides a wire locking system. The wire locking system includes a delivery assembly and a locking member. The locking member is arranged on the delivery assembly and is used for inserting into the lumen of a wire. The component is used to adjust the radial size of the locking member, so that the locking member abuts against the inner wall of the wire in the radial direction, and can drive the wire to move synchronously.

The present application also provides a wire locking device for taking out a slender tube structure implanted in the body. The wire locking device includes a handle and a wire locking system. The proximal end of the delivery component of the wire locking system is connected to the The handle, the wire locking system includes a delivery assembly and a locking member, the locking member is arranged on the delivery assembly and is used to insert a wire into the inner cavity, and the delivery assembly is used to adjust the radial direction of the locking member. The size is such that the locking member is close to the inner wall of the wire in the radial direction and can drive the wire to move synchronously.

After the wire locking system of the wire locking device of the present application is inserted into the inner cavity of the elongated tube structure, the radial size of the locking member is gradually increased by operating the conveying assembly until the locking member is firmly attached to the inner wall of the elongated tube structure , So that the wire locking system and the slender tube structure are firmly connected, and the slender tube structure can be moved out of the body by moving the handle to the proximal end. Since the radial size of the locking member can be adjusted, the locking member can not only lock the slender tube structure of different inner diameter sizes, and make the wire locking system suitable for the slender tube structure of different inner diameters, and is beneficial in different application environments. The locking of the wire locking system and the slender tube body structure is stable, and the locking effect is improved.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present application more clearly, the following will briefly introduce the drawings that need to be used in the embodiments. Obviously, the drawings in the following description are some embodiments of the present application, which are common in the field. As far as technical personnel are concerned, they can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic structural diagram of a wire locking device provided by a first embodiment of the present application;

FIG. 2 is a schematic structural diagram of the wire locking system of the wire locking device in FIG. 1;

FIG. 3 is a schematic structural diagram of the wire locking system in FIG. 2 from another perspective;

Fig. 4 is a schematic structural diagram of a locking member of the wire locking system in Fig. 2;

Fig. 5 is a schematic structural diagram of the handle of the wire locking device in Fig. 1;

Fig. 6 is a perspective structural diagram of one of the locking members of the wire locking system in Fig. 3 in a folded state;

FIG. 7 is a schematic structural diagram of the wire locking system in FIG. 6 from another perspective;

8 is a schematic diagram of the structure of the locking member of the wire locking system of the wire locking device provided by the second embodiment of the present application;

Fig. 9 is an enlarged view of part IX in Fig. 8;

10 is a partial structural diagram of one state of the conveying assembly of the wire locking system of the wire locking device provided by the third embodiment of the present application;

Fig. 11 is a partial structural diagram of the conveying assembly in Fig. 10 in another state;

12 is a schematic structural diagram of one state of the wire locking system of the wire locking device provided by the fourth embodiment of the present application;

FIG. 13 is a schematic structural diagram of the wire locking system in FIG. 12 in another state;

14 is a schematic structural diagram of one state of the wire locking system of the wire locking device provided by the fifth embodiment of the present application;

15 is a schematic structural diagram of another state of the wire locking system in FIG. 14;

16 is a schematic structural diagram of one state of the wire locking system of the wire locking device provided by the sixth embodiment of the present application;

Fig. 17 is a schematic structural diagram of the wire locking system in Fig. 16 in another state.

Fig. 18 is a schematic structural diagram of a wire locking device provided by a seventh embodiment of the present application.

Fig. 19 is a schematic structural diagram of one state of the locking member of the wire locking device in Fig. 18.

Fig. 20 is a schematic structural diagram of the locking member in Fig. 19 in another state.

Fig. 21 is a structural schematic diagram of the handle of the wire locking device in Fig. 18.

22 is a schematic structural diagram of one state of the locking member of the wire locking device provided by the eighth embodiment of the present application.

Fig. 23 is a schematic structural view of the locking member in Fig. 22 in another state.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by a person of ordinary skill in the art without creative work shall fall within the protection scope of this application.

In the description of this application, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for It is convenient to describe the application and simplify the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore cannot be understood as a limitation of the application. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

In order to more clearly describe the structure of the wire locking system and the wire locking device, the limited terms "proximal", "distal" and "axial" described in this application are common terms in the field of interventional medicine. Specifically, "distal" refers to the end far away from the operator during the surgical operation; "proximal end" refers to the end closer to the operator during the surgical operation; the proximal end in this application is relative to the distal end from the operator ( The distance between the surgeon) is relatively short. After the device is assembled, each component of the device includes a proximal end and a distal end, and the proximal end of each component is closer to the operator than the distal end. "Axial" refers to the direction of the central axis of the device, and the radial direction is the direction perpendicular to the central axis. Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the technical field of this application. Conventional terms used in the specification of this application are only for the purpose of describing specific embodiments, and should not be construed as limiting the application.

It should be noted that when an element is referred to as being "fixed to" or "installed on" another element, the element can be directly connected to the other element, or indirectly connected to the other element through one or more connecting elements. On one component. When an element is said to be "connected to" another element, it can be directly connected to the other element or connected to the other element through one or more connecting elements.

Please refer to FIG. 1, which is a schematic structural diagram of a wire locking device 100 provided by a first embodiment of the present application. The present application provides a wire locking device 100, which is used to take out a slender tube structure implanted in a patient. The slender tube structure includes, but is not limited to, catheters, sheaths, cardiac electrical leads, and various other devices that have been implanted in the patient; the cardiac electrical leads include pacemaker leads or defibrillators Wire etc. For the sake of convenience, the present application takes the lead 500 of a pacemaker as an example. The distal end of the lead 500 of the pacemaker is also connected with electrodes fixed on the heart. The lead locking device 100 is used to connect the electrodes of the pacemaker. At least the lead wire 500 of the pacemaker is taken out during the removal operation or other surgical operations.

The wire locking device 100 includes a wire locking system 20 and a handle 50 disposed at the proximal end of the wire locking system 20. The distal end of the wire locking system 20 is used to insert the inner cavity 502 of the wire 500 and lock the inner wall of the wire 500; the wire locking system 20 includes The locking member 22 and the conveying assembly 26 connected to the locking member 22 are adjusted by operating the conveying assembly 26 to adjust the radial size of the locking member 22, so that the locking member 22 abuts against the inner wall of the wire 500 in the radial direction, and can drive the wire 500 to make Synchronized movement. Specifically, the locking member 22 is connected to the distal end of the delivery assembly 26, and the handle 50 is connected to the proximal end of the delivery assembly 26. The locking member 22 and the distal end of the delivery assembly 26 are used to insert the guide wire 500 into the inner cavity. When the distal end of the guide wire 500 is drawn, the radial size of the locking member 22 is gradually increased by controlling the delivery assembly 26 until the locking member 22 abuts against the inner wall of the guide wire 500 in the radial direction, so that moving the handle 50 to the proximal end can drive the locking member 22 Take the lead 500 out to the body. The locking member 22 abuts against the inner wall of the wire 500 in the radial direction means that the locking member 22 is in an interference fit or abutting against the inner wall of the wire 500 in the radial direction, so that the locking member 22 locks the wire 500.

After the wire locking system 20 of the wire locking device 100 of the present application is inserted into the inner cavity 502 of the wire 500 and moved to a suitable position, the radial size of the locking member 22 is gradually increased by controlling the conveying assembly 26 until the locking member 22 is firmly pressed against. On the inner wall of the wire 500, the wire locking system 20 is firmly connected to the wire 500, and then the handle 50 can be moved proximally to move the wire 500 out of the body. Since the radial size of the locking member 22 can be adjusted, the locking member 22 can lock the wires 500 with different inner diameter sizes, so that the wire locking system 20 is suitable for slender tube structures with different inner diameters, and is beneficial to use in different application environments. The locking of the wire locking system 20 and the elongated tube structure is stable, which improves the locking effect and prevents operation failure.

Please refer to FIGS. 2 to 4 together. FIG. 2 is a schematic structural diagram of the wire locking system 20 of the wire locking device in FIG. 1; FIG. 3 is a schematic structural diagram of the wire locking system 20 in FIG. 2 from another perspective; FIG. 4 It is a structural diagram of the locking member 22 of the wire locking system 20 in FIG. 2. The conveying assembly 26 includes an inner core 261 and a sleeve 265 sleeved together. The locking member 22 is arranged between the inner core 261 and the sleeve 265. The inner core 261 and the sleeve 265 can move relative to each other, so that the inner core 261 and the sleeve 265 can move relative to each other. The force exerted by the cylinder 265 on the locking member 22 for generating deformation changes, thereby adjusting the size of the locking member 22 in the radial direction. Specifically, the sleeve 265 has a cylindrical shape and is sleeved on the periphery of the inner core 261. The sleeve 265 and the inner core 261 can slide relative to each other in the axial direction. The proximal end of the inner core 261 is connected to the handle 50, and the locking member 22 is arranged in the inner core 261. The distal end of the core 261 is located at the distal end of the sleeve 265. The sleeve 265 slides toward the distal end relative to the inner core 261. The locking member 22 is compressed and deformed by the sleeve 265 and the inner core 261 to gradually enlarge the locking member. The radial dimension of 22. In the initial state, the distal end of the sleeve 265 and the proximal end of the locking member 22 may be connected or disconnected. Preferably, the proximal end of the locking member 22 and the distal end of the sleeve 265 are not connected.

In this embodiment, the locking member 22 is at least one elastic piece disposed on the inner core 261, and the inner core 261 and the sleeve 265 move relatively close to the elastic piece in the axial direction to deform the elastic piece by squeezing the elastic piece to change the radial dimension. The elastic sheet is in a strip structure, and the elastic sheet is penetrated on the inner core 261 through a plurality of through holes; specifically, the distal end of the elastic sheet is fixedly connected to the distal end of the inner core 261, and the sleeve 265 and the inner core 261 are along the axis The relative movement causes the force of the sleeve 265 to squeeze the other end of the elastic sheet to change. Specifically, when the sleeve 265 slides toward the elastic piece relative to the inner core 261, the distal end of the sleeve 265 gradually approaches the proximal end of the elastic piece, and when the sleeve 265 continues to move to the distal end and squeeze the proximal end of the elastic piece When the elastic piece is squeezed toward the distal end to shrink and fold and deform, that is, the size of the elastic piece in the axial direction gradually decreases, the radial size of the elastic piece gradually increases, and the end of the sleeve 265 squeezes the The force of the elastic piece gradually increases, and the elastic deformation of the elastic piece also gradually increases. Specifically, after the sleeve 265 contacts the locking member 22, the greater the force that the sleeve 265 presses against the proximal end of the locking member 22, the greater the degree of expansion of the locking member 22 in the radial direction, that is, the greater the radial dimension of the locking member 22. Larger, shorter compressed in the axial direction, so that the locking member 22 can lock a variety of wires with different inner diameters, which improves the scope of application of the wire locking device.

In other embodiments, the proximal end of the elastic piece is fixedly connected to the distal end of the sleeve 265, the distal end of the inner core 261 is connected to the distal end of the elastic piece, and the inner core 261 moves toward the proximal end relative to the sleeve 265 to squeeze The elastic sheet is pressed to shrink toward the proximal end to be folded and deformed, so that the size of the elastic sheet in the axial direction is gradually reduced, and the radial size of the elastic sheet gradually increases.

In other embodiments, the distal end of the elastic piece is fixedly connected to a position other than the distal end on the inner core 261; and/or the proximal end of the elastic piece is connected to the distal end of the sleeve 265; and/or the sleeve 265 is relative to The locking member 22 is disposed on the outer periphery of the distal end of the inner core, and the proximal end of the locking member 22 is connected to the inner core 261.

As shown in FIGS. 2 to 4, the locking member 22 has a plurality of through holes 220 spaced apart along its length, the inner core 261 is inserted through the through holes 220 in turn, the distal end of the sleeve 265 and the distal end of the inner core 261 Close to each other to squeeze the locking member 22 to produce elastic deformation, so that the part between the two adjacent through holes 220 of the locking member 22 bends away from the axis of the inner core 261, so as to gradually increase the locking member 22 Radial size. The width of the elastic piece is less than or equal to the outer diameter of the sleeve 265, so that the largest diameter component in the locking system 200 is the sleeve 265, which facilitates the insertion of the inner core 261 and the elastic piece into the wire 500 (FIG. 1). The width of the elastic piece is greater than the inner diameter of the sleeve 265, so that when the sleeve 265 squeezes one end of the elastic piece, the elastic piece is prevented from being inserted into the sleeve 265 to facilitate operation.

Preferably, the width of the elastic piece is equal to the outer diameter of the sleeve 265; when the inner core 261 is inserted through the through holes 220 in turn, the locking member 22 is in a stretched state before being squeezed. At this time, the locking The radial dimension of the member 22 is less than or equal to the outer diameter of the sleeve 265 and greater than the inner diameter of the sleeve 265. The sleeve 265 can press against the end of the locking member 22 when sliding toward the distal end relative to the inner core 261. Further, each through hole 220 is a bar-shaped hole, and the through hole 220 extends in the axial direction. In this embodiment, each through hole 220 is a waist-shaped hole. After the distal end of the inner core 261 is inserted through the plurality of through holes 220 in turn, the distal end of the locking member 22 is fixedly connected to the distal end of the inner core 261 by welding or bonding; when the locking member 22 is in the extended state, the locking member 22 The proximal end of 22 does not touch or just touches the distal end of the sleeve 265, and the locking member 22 is not subjected to pressure from the sleeve 265. At this time, the wire locking system 20 can be inserted into any wire whose inner diameter is larger than the outer diameter of the sleeve 265. Cavity. Since the locking member 22 fixedly connected to the inner core 261 and the distal end of the inner core 261 have different bending degrees corresponding to different distances, the sizes of the through holes 220 of the locking member 22 at different positions are different. Specifically, the closer the locking member 22 is to the distal end of the inner core 261, the greater the degree of bending of the elastic piece, and the smaller the length of the through hole 220 can be set. The size of the plurality of through holes 220 on the locking member 22 may be set to be the same.

2 and 3, the sleeve 265 is a stainless steel tube, the inner diameter of the sleeve 265 is 0.2-0.4 mm, and the outer diameter of the sleeve 265 is 0.4-0.6 mm. The wire locking system 20 in this embodiment can lock the inner diameter Wire 500 larger than 0.4-0.6 mm. In practical applications, the inner diameter and outer diameter of the sleeve 265 can be set as required to lock wires 500 of different sizes. The inner core 261 has a linear shape and is used to carry the sleeve 265 and the locking member 22. Preferably, the inner core 261 is a stainless steel wire of 0.1-0.3 mm.

Please refer to FIG. 5. FIG. 5 is a structural diagram of the handle 50 of the wire locking device 100 in FIG. 1. The handle 50 includes a first joint 53 and a second joint 54 movably connected to the first joint 53. The first joint 53 is used for connecting the inner core 261, and the second joint 54 is used for connecting the sleeve 265. The first joint 53 and the second joint 54 are clamped to each other. Specifically, the first joint 53 includes a main body 52 and a connector 56. The main body 52 is cylindrical and is provided with a threading cavity 520 penetrating in the axial direction. The second joint 54 Clamped to the distal opening of the threading cavity 520, the proximal end of the inner core 261 extends from the distal end of the threading cavity 520 to the proximal end of the threading cavity 520, the connector 56 is inserted into the proximal opening of the threading cavity 520, and The proximal end of the inner core 261 is fixed between the plug 56 and the main body 52. The main body 52 is used for the operator to grasp and control the relative movement between the inner core 261 and the sleeve 265. The second joint 54 and the plug 56 are both detachably connected to the main body 52. Further, the second joint 54 and the plug The connecting pieces 56 are all detachably snap-connected to the main body 52.

Specifically, the second joint 54 includes a fixing portion 541, a cylindrical neck 543, and a hook portion 545 arranged in sequence, and the diameters of the three are, in order from large to small, the fixing portion 541, the hook 545, and the neck 543. The diameter of the fixing portion 541 is close to or equal to the diameter of the main body 52. The threading cavity 520 of the main body 52 includes a slot cavity 521, a communication hole 525, and an insertion cavity 523 from the distal end to the proximal end. The neck 543 and the hook portion 545 are used to be accommodated in the slot cavity 521, and the hook portion 545 and the slot The cavities 521 are engaged with each other so that the second joint 54 is detachably connected to the distal end of the main body 52.

The second joint 54 is axially provided with an inner cavity 542 penetrating the opposite end faces of the second joint 54. The inner cavity 542 includes a first cavity 5421 disposed at the distal end of the second joint 54 and a second cavity disposed at the proximal end of the second joint 54 5423, the first cavity 5421 and the second cavity 5423 pass through. The first cavity 5421 is used for accommodating and fixing the proximal end of the sleeve 265; the second cavity 5423 is used for inserting the inner core 261.

The plug 56 is matched with the plug cavity 523 at the proximal end of the main body 52. The communication hole 525 is located between the slot cavity 521 of the main body 52 and the insertion cavity 523, and communicates with the slot cavity 521 and the insertion cavity 523. The proximal end of the inner core 261 sequentially passes through the first cavity 5421, the second cavity 5423, and the communicating hole 525 into the insertion cavity 523. After the connector 56 is inserted and fixed in the insertion cavity 523, the inner core 261 in the cavity 523 is inserted. The proximal end of the pin is clamped between the plug 56 and the inner wall of the main body 52 adjacent to the plug cavity 523, so that the inner core 261 is fixed to the inside of the handle 50.

It is understandable that the outer surface of the plug 56 and the inner wall of the main body 52 adjacent to the plug cavity 523 can be provided with grooves and bumps that can be engaged with each other, and the plug 56 can be locked by the engagement of the grooves and the bumps. It is detachably plugged into the main body 52. When the plug 56 is removed from the main body 52, the inner core 261 can be removed.

The second joint 54 is used to maintain the relative positional relationship between the sleeve 265 and the inner core 261. When the sleeve 265 is not required to slide relative to the inner core 261, the second joint 54 is used to fix the sleeve 265 on the handle 50, which can effectively reduce the probability of misoperation; when the sleeve 265 needs to be pushed forward, the operator The second connector 54 is pushed distally on the housing 50, so that the hook 545 is withdrawn from the slot cavity 521, that is, the second connector 54 is detached from the main body 52, and the second connector 54 moves distally to drive the sleeve 265 relative to each other. The inner core 261 moves to the distal end so that the distal end of the sleeve 265 presses against the locking member 22. The second connector 54, the main body 52, and the plug-in member 56 may all be elastic members; or only the main body 52 is an elastic member, and the second connector 54 and the plug-in member 56 are both hard members; or the main body 52 is a hard member. Both the second joint 54 and the plug-in member 56 are elastic members.

Please refer to FIGS. 1 to 7 together. FIG. 6 is a three-dimensional structural diagram of the wire locking system 20 in FIG. 3 in one of the folded states; FIG. 7 is a structural diagram of the wire locking system 20 in FIG. 6 from another perspective. During the operation, the guidewire locking system 20 is inserted into the inner cavity 502 of the guidewire 500 in the body, and the handle 50 is pushed distally along the inner cavity of the guidewire 500 until the locking member 22 reaches a predetermined position, which is generally the distal end of the guidewire 500 , Which is closer to the heart and the electrode at the end of the lead 500. The operator uses the first joint 52 to keep the inner core 261 stationary, and moves the second joint 54 to the distal end to drive the sleeve 265 to move distally relative to the inner core 261, so that the distal end of the sleeve 265 presses the proximal end of the locking member 22 , The proximal end of the locking member 22 is moved to its distal end, and the axial size of the locking member 22 is reduced. Since the distal end of the locking member 22 is fixed on the distal end of the inner core 261, the plurality of through holes 220 on the locking member 22 penetrate the locking member 22 on the inner core 261, so that at least two adjacent through holes 220 The elastically deformed part of the elastic piece protrudes away from the axis of the inner core 261, and presents a folded shape as shown in FIGS. 6-7. The radial size of the locking member 22 becomes larger, and the inner wall of the wire 500 can be firmly clamped. , In order to achieve the locking of the distal end of the wire 500. The greater the driving force acting on the second joint 54 toward the distal end, the greater the force that the sleeve 265 presses against the proximal end of the locking member 22, and the greater the degree of expansion of the locking member 22 in the radial direction, so that the diameter of the locking member 22 The larger the axial size, the shorter the axial compression. When the radial size of the locking member 22 is too large, the driving force to the second joint 54 can be reduced, so that the locking member 22 can be partially deformed to reduce the locking member. The radial dimension of 22.

The wire locking probe 20 provided in this embodiment can gradually increase the radial size of the locking member 22 according to the needs of practical applications to achieve a better locking effect. For example, after the locking member 22 reaches a predetermined position, the operator moves toward the distal end. Pushing the sleeve 265, the radial dimension of the locking member 22 will gradually increase; if the operator pulls the inner core 261 to the proximal end, the inner core 261 cannot drive the sleeve 265 to move synchronously, it is obtained that the locking member 22 locks the wire 500 The effect is not good. That is, when the inner core 261 is pulled, the inner core 261 and the sleeve 265 will slide relatively, and the operator can continue to push the sleeve 265 to the distal end to increase the force of the sleeve 265 pressing the proximal end of the locking member 22, so that the sleeve The cylinder 265 further squeezes the locking member 22, so that the expansion degree of the locking member 22 in the radial direction is greater, so that the radial size of the locking member 22 continues to increase, until the inner core 261 completely locks the sleeve 265 (ie, pulls it proximally) When the inner core 261 is used, the inner core 261 and the sleeve 265 will not slide relative to each other). The wire locking device 100 provided in the present application can adjust the radial size of the wire locking probe 20 according to actual needs, so as to adapt to slender tube structures with different inner diameters, and can lock the locking member 22 and the slender tube structure firmly.

Please refer to FIGS. 8 and 9 together. FIG. 8 is a structural diagram of the locking member 22a of the wire locking system of the wire locking device provided by the second embodiment of the present application; FIG. 9 is an enlarged view of the IX part in FIG. 8. The structure of the wire locking device provided by the second embodiment of the present application is similar to that of the first embodiment, except that: in the second embodiment, the locking member 22a has two adjacent through holes 220 between each other. Set barb 222. Specifically, the locking member 22a is laser-cut at least one barb 222 between two adjacent through holes 220; preferably, each barb 222 is located in the middle between the two corresponding through holes 220 on the locking member 22a. Or near the middle part, so that the barb 200 will be warped when the shrapnel is deformed. The tip of each barb 222 faces the proximal end, that is, each barb 222 faces the sleeve 265. When the elastic sheet is squeezed by the inner core 261 and the sleeve 265 to deform, the tip of the barb 222 is tilted toward the proximal direction, so that the operator can pull out the wire 500 through the inner core 261.

In other embodiments, by improving the surface roughness of the locking member 22a, the wire locking probe can more easily lock the inner wall of the elongated tube structure.

The method of using the wire locking device in the second embodiment is the same as that in the first embodiment, and will not be repeated here.

Please refer to FIGS. 10 and 11 together. The structure of the wire locking device provided by the third embodiment of the present application is similar to that of the first embodiment, except that: in the third embodiment, the conveying assembly 26 also includes a configuration A positioning member 266 at or adjacent to the proximal end of the sleeve 265 is connected between the inner core 261 and the sleeve 265. The positioning member 266 is used to fix the inner core 261 and the sleeve 265, that is, the inner core 261 and the sleeve 265. The sleeves 265 are fixed to each other by a positioning member 266, which prevents relative movement between the inner core 261 and the sleeve 265 in the axial direction. Preferably, the positioning member 266 is provided at the distal end of the handle 50.

The positioning member 266 includes a first positioning member 267 fixedly connected to the inner core 261 and a second positioning member 268 fixedly connected to the sleeve 265. The first positioning member 267 and the second positioning member 268 cooperate with each other to obtain multiple positioning positions , To keep the locking member in different radial sizes, it can meet the needs of the slender tube structure; after the first positioning member 267 and the second positioning member 268 are engaged and positioned, the operator does not need to hold the sleeve 265 all the time To maintain the relative positional relationship between the two with the inner core 261, it is convenient for the operator to perform subsequent pulling of the wire 500 or other operations.

In this embodiment, the second positioning member 268 is tubular, the first positioning member 267 can be inserted into the inner cavity of the second positioning member 268, and the first positioning member 267 and the second positioning member 268 are connected by an elastic block and Card hole for positioning. Preferably, the first positioning member 267 and the second positioning member 268 are both tubular, the first positioning member 267 is fixedly sleeved on the periphery of the inner core 261, and the distal end of the second positioning member 268 is fixedly sleeved near the sleeve 265. At the periphery of the end, the inner diameter of the second positioning member 268 is larger than the outer diameter of the first positioning member 267, and one of the two is an elastic member; the clamping hole and the clamping block are respectively provided on the outer peripheral surface of the first positioning member 267 and the second positioning member 268 When the sleeve 265 slides relative to the inner core 261, the relative position between the second positioning member 268 and the first positioning member 267 also changes accordingly on the inner peripheral surface of the sleeve, and is locked into the corresponding hole through the clamping block Positioning.

As shown in FIG. 10, the outer peripheral surface of the first positioning member 267 is provided with a plurality of clamping holes 2670 spaced along the axial direction, and the plurality of clamping holes 2670 are arranged at intervals along the axial direction, that is, each clamping hole 2670 is relative to the first positioning member 267. The distance of the far end is different. A clamping block 2680 is provided on the inner peripheral surface of the second positioning member 268, and the clamping block 2680 can be selectively clamped into any clamping hole 2670, so that the first positioning member 267 and the second positioning member 268 are positioned at different positioning positions in cooperation with each other. . When the clamping block 2680 is clamped into different clamping holes 2670, the radial size of the locking member is different.

Preferably, a chamfer is provided on the side wall at the opening of each locking hole 2670 to facilitate the sliding of the locking block 2680; and/or a chamfer is provided around the end of the locking block 2680 to facilitate the sliding of the locking block 2680.

In other embodiments, the inner wall (inner peripheral surface) of the second positioning member 268 has a plurality of locking holes spaced along the axial direction, and the outer peripheral surface of the first positioning member 267 is provided with elastic locking blocks, and the locking blocks can be selectively locked in. In any clamping hole, the first positioning member 267 and the second positioning member 268 are positioned at different positioning positions in cooperation with each other, so that the radial size of the locking member 22 is different.

12 and 13 together, the structure of the wire locking device provided by the fourth embodiment of the present application is similar to the structure of the first embodiment, except that: in the fourth embodiment, the locking member 22b is at least one An elastic piece, the elastic piece is enclosed in a ring or a partial ring, the peripheral wall of the elastic piece is provided with two opposite through holes, and the distal end of the inner core 261 penetrates the two through holes of the elastic piece. When the sleeve 265 and the inner core 261 move relative to each other in the axial direction, the force of the sleeve 265 squeezing the other end of the elastic sheet is changed, so as to squeeze the elastic sheet to produce elastic deformation, so that the radial dimension and the axial direction of the locking member 22b The size changes.

The sleeve 265 slides distally with respect to the inner core 261, and the distal end of the sleeve 265 presses against the elastic piece in the locking member 22b to deform, that is, the size of the elastic piece in the axial direction of the inner core 261 is reduced, and the radial direction of the elastic piece is reduced. The size is gradually increased, so that the locking member 22b is firmly locked to the inner wall of the wire 500. The elastic sheet can be in the shape of a circular ring, an elliptical ring, a square ring or other irregular closed ring structures. Two opposite through holes are provided on the peripheral wall of the elastic piece, and the specific position of the through holes on the peripheral wall of the elastic piece is not limited.

In this embodiment, the number of elastic pieces is multiple, and the plurality of elastic pieces are sleeved on the distal end of the inner core 261 through the through holes, and the most distal elastic piece is fixedly connected to the inner core 261. When the sleeve 265 slides distally with respect to the inner core 261, the distal end of the sleeve 265 is pressed against the elastic pieces to deform, that is, the size of each elastic piece in the axial direction of the inner core 261 decreases, and the radial size of the elastic piece gradually decreases. The enlargement facilitates the locking member 22b to be firmly locked to the inner wall of the wire 500. Only one through hole may be provided on the peripheral wall of the most distal elastic piece. After the distal end of the inner core 261 passes through the only through hole of the most distal elastic piece, it is welded or adhesively fixed with the most distal elastic piece.

In this embodiment, each elastic piece has a circular ring shape, and two through holes on the elastic piece are arranged opposite to each other. In the unsqueezed state of the shrapnel, the axial size of the inner core 261 occupied by each shrapnel is relatively large, and the radial size is relatively small; in the squeezed state of the shrapnel, the axis of each shrapnel along the inner core The radial size becomes smaller, the radial size becomes larger, that is, it deforms into an elliptical ring or similar shape. The closer the distal end of the sleeve 265 is to the distal end of the inner core 261, the greater the radial dimension of the locking member 22b.

14 and 15 together, the structure of the wire locking device provided by the fifth embodiment of the present application is similar to the structure of the first embodiment, except that: in the fifth embodiment, the locking member 22c is disposed on The elastic locking piece 223 on the inner core 261, the distal end of the locking piece 223 is connected to the inner core 261, the sleeve 265 is adjacent to the proximal end of the inner core 261 relative to the locking member 22c, and the distal end of the sleeve 265 is provided with a guide portion 2650 There is a gap between the proximal end of the locking piece 223 and the outer surface of the inner core 261, and the sleeve 265 slides relative to the inner core 261, so that the position of the guide portion 2650 inserted into the gap is changed, thereby adjusting the radial size of the locking member 22c .

Specifically, the locking member 22c includes an elastic locking piece 223 provided at the distal end of the inner core 261, and a fixing barrel 225 connected to the distal end of the locking piece 223. The distal end of the locking piece 223 is connected to the inner core 261 through the fixing barrel 225. At the distal end, the inner core 261 and the sleeve 265 move relative to each other in the axial direction so that the guide portion 2650 of the distal end of the sleeve 265 is slidably inserted into the gap, and pushes against the inner surface of the proximal end of the locking piece 223 to push the locking piece 223 The elastic deformation causes the proximal end of the locking piece 223 to move toward the axis away from the inner core 261 to change the radial dimension.

When the sleeve 265 slides toward the distal end relative to the inner core 261, the guide portion 2650 is slidably inserted into the gap and pushes against the inner surface of the proximal end of the locking piece 223, so that the proximal end of the locking piece 223 faces away from the axis of the inner core 261 When the sleeve 265 slides toward the proximal end relative to the inner core 261, the guide portion 2650 slides out of contact with the inner surface of the proximal end of the locking piece 223, so that The proximal end of the locking piece 223 moves toward the axis of the inner core 261, that is, moves away from the inner wall of the wire 500 (FIG. 1), so as to return to the original state.

The diameter of the guide portion 2650 gradually decreases from the proximal end to the distal end, that is, the diameter of the distal end of the guide portion 2650 is smaller than the diameter of the sleeve 265, so as to facilitate the insertion of the distal end of the guide portion 2650 between the locking piece 223 and the inner core 261. In the gap, the inner surface of the proximal end of the locking piece 223 is slidably pressed. The locking piece 223 is made of a metal with high elasticity, such as spring steel and nickel titanium steel.

Preferably, the cross section of the locking piece 223 is arc-shaped, and before the locking piece 223 is elastically deformed, the diameter of the outer circumferential surface of the locking piece 223 is less than or equal to the diameter of the outer circumferential surface of the sleeve 265.

In this embodiment, the distal end of the inner core 261 is provided with two opposite locking pieces 223, and the two locking pieces 223 are connected to the distal end of the inner core 261 through a fixing barrel 225. The two locking pieces 223 are both strip-shaped and extend axially toward the proximal end, and the gap between the two locking pieces 223 also extends axially. The two locking pieces 223 are enclosed in a hollow tube shape, and the inner cavity extending along the axial direction enclosed by the two locking pieces 223 is used to accommodate part of the inner core 261, and the distal end of the inner core 261 is welded or welded through the aforementioned inner cavity. It is fixed to the inside of the fixed cylinder 225 by bonding.

When the sleeve 265 does not push the locking piece 223, the guide portion 2650 of the sleeve 265 does not enter the inner cavity enclosed by the two locking pieces 223, the locking piece 223 is not deformed, and the proximal ends of the two locking pieces 223 are close The diameter of the outer circumferential surface of the two locking pieces 223 is less than or equal to the diameter of the outer circumferential surface of the sleeve 265. The operator uses the handle 50 to control the inner core 261 to drive the locking member 22c to move in the inner cavity of the wire 500. When the locking member 22c reaches a predetermined position, such as a position close to the heart and electrodes, the operator uses the handle 50 to keep the inner core 261 stationary. Push the sleeve 265 distally so that the guide portion 2650 at the distal end of the sleeve 265 gradually enters the inner cavity enclosed by the two locking pieces 223 and slides against the locking pieces 223, causing the proximal ends of the two locking pieces 223 to expand. That is, the distance between the proximal ends of the two locking pieces 223 gradually increases, so that the radial size of the locking piece 22c gradually becomes larger, so as to firmly clamp the inner wall of the wire 500 to realize the alignment of the distal end of the elongated tube structure. Of the lock. The closer the guide portion 2650 is to the distal end of the locking piece 223 in the inner cavity, the larger the size of the locking piece 22c in the radial direction. When the radial dimension of the locking member 22c is too large, the radial dimension of the locking member 22c can be reduced by pulling the sleeve 265 toward the proximal end to restore the partial deformation of the locking piece 223.

In other embodiments, a plurality of locking pieces 223 are provided on the outer periphery of the distal end of the inner core 261, and the plurality of locking pieces 223 are arranged along the circumference of the inner core 261 and enclose an inner cavity that facilitates the insertion of the distal end of the sleeve 265, namely A plurality of locking pieces 223 are connected to the distal end of the inner core 261 through the fixing cylinder 225, and the locking pieces 223 are arranged in a circle along the circumference of the inner core 261 at intervals, and enclose a cavity that facilitates the insertion of the distal end of the sleeve 265. Each locking piece 223 is strip-shaped and extends axially toward the proximal end, and the gap between two adjacent locking pieces 223 also extends axially. These locking pieces 223 are enclosed in a hollow tube shape. When the guide portion 2650 of the sleeve 265 does not enter the inner cavity enclosed by the locking pieces 223, the locking pieces 223 will not be deformed. The proximal ends of the locking pieces 223 are close to each other. The outer peripheral surface is coplanar with the outer peripheral surface of the sleeve 265; when the guide portion 2650 of the sleeve 265 is inserted into the inner cavity enclosed by the locking piece 223, the guide portion 2650 slidably pushes the locking piece 223 so that the distal end of the locking piece 223 The elastic deformation causes the spacing between the proximal ends of the locking pieces 223 to gradually increase, so that the radial size of the locking piece 22c gradually increases, so as to firmly clamp the inner wall of the elongated tube structure to achieve alignment of the elongated tube body. Locking of the distal end of the structure.

It can be understood that the adjacent locking pieces 223 may be arranged at intervals.

16 and 17 together, the structure of the wire locking device provided by the sixth embodiment of the present application is similar to the structure of the fifth embodiment, except that: in the sixth embodiment, the locking member 22d is provided in the The elastic locking piece 223 around the distal end of the sleeve 265, the proximal end of the locking piece 223 is connected to the distal end of the sleeve 265, the distal end of the inner core 261 is provided with a guide portion 2610, the distal end of the locking piece 223 and the inner core 261 There is a gap between the outer surfaces of the inner core 261 and the sleeve 265 relative to move in the axial direction, so that the guide portion 2610 of the inner core 261 is inserted into the gap to push the locking piece 223 to elastically deform, so that the distal end of the locking piece 223 faces toward Move away from the axis of the inner core 261, thereby adjusting the radial size of the locking member 22d. After the guiding portion 2610 is located in the gap, the closer the guiding portion 2610 is to the proximal end of the sleeve 265 in the gap, the greater the degree of elastic deformation of the locking piece 223 and the larger the radial dimension of the locking piece 223; the farther away the guiding portion 2610 is in the gap At the proximal end of the barrel 265, the smaller the degree of elastic deformation of the locking piece 223 is, the smaller the radial dimension of the locking piece 223 is.

Specifically, the inner core 261 slides toward the proximal end relative to the sleeve 265, and the outer surface of the guide portion 2610 slidably pushes against the inner surface of the locking piece 223, so that the distal end of the locking piece 223 moves toward an axis away from the inner core 261. The diameter of the guide portion 2610 gradually decreases from the distal end to the proximal end, that is, the diameter of the distal end of the guide portion 2610 is larger than the diameter of the inner core 261, so that the proximal end of the guide portion 2610 can be inserted between the locking piece 223 and the inner core 261. The position changes, and the inner surface of the locking piece 223 can be slidably pressed.

Preferably, the cross section of the locking piece 223 is arc-shaped. Before the locking piece 223 is elastically deformed, the diameter of the outer circumferential surface of the locking piece 223 is less than or equal to the diameter of the outer circumferential surface of the sleeve 265.

In this embodiment, the distal end of the sleeve 265 is provided with two relatively spaced locking pieces 223, the two locking pieces 223 are directly connected to the distal end of the sleeve 265, the locking piece 223 and the sleeve 265 are integrally formed, or the locking piece 223 Welded around the distal end of the sleeve 265. The two locking pieces 223 are both strip-shaped and extend axially toward the proximal end, and the gap between the two locking pieces 223 also extends axially. The two locking pieces 223 are enclosed in a hollow tube, and the inner core 261 is inserted into the hollow tube enclosed by the two locking pieces 223.

When the inner core 261 does not push the locking piece 223, the guide portion 2610 of the inner core 261 does not enter the inner cavity enclosed by the two locking pieces 223, the locking piece 223 is not deformed, and the distal ends of the two locking pieces 223 are close , The diameter of the outer circumferential surface of the two locking pieces 223 is less than or equal to the diameter of the outer circumferential surface of the sleeve 265; pushing the inner core 261 to drive the guide portion 2610 to move distally, and the control sleeve 265 follows the guide portion 2610 to move distally, when When the distal end of the sleeve 265 reaches a predetermined position, the control sleeve 265 does not move, and the inner core 261 is pulled toward the proximal end, so that the proximal end of the guide portion 2610 gradually enters the inner cavity surrounded by the two locking pieces 223 and slides against it. Pushing the inner surface of the locking piece 223 causes the distal ends of the two locking pieces 223 to expand, that is, the distance between the distal ends of the two locking pieces 223 gradually increases, so that the radial dimension of the locking piece 22d gradually increases to stabilize The inner wall of the slender tube body structure is ground clamped to realize the locking of the distal end of the slender tube body structure. The closer the guide portion 2610 is to the sleeve 265 in the inner cavity, the larger the size of the locking member 22d in the radial direction. When the radial dimension of the locking member 22d is too large, the radial dimension of the locking member 22d can be reduced by pulling the sleeve 265 proximally or pushing the inner core 261 distally to restore the partial deformation of the locking piece 223.

In other embodiments, more than two locking pieces 223 are provided on the outer periphery of the distal end of the sleeve 265, and the multiple locking pieces 223 are arranged at intervals along the circumference of the sleeve 265, and are enclosed to facilitate the insertion of the inner core 261. The inner cavity into which the distal end of the guide 2610 is inserted. Each locking piece 223 is strip-shaped and extends axially toward the proximal end, and the gap between two adjacent locking pieces 223 also extends axially. These locking pieces 223 are enclosed in a hollow tube shape. When the guide portion 2610 of the inner core 261 does not enter the inner cavity enclosed by the locking pieces 223, the locking pieces 223 will not be deformed. The distal ends of the locking pieces 223 are close to each other. The diameter of the outer peripheral surface is less than or equal to the diameter of the outer peripheral surface of the sleeve 265. When the guide portion 2610 of the inner core 261 is inserted into the inner cavity enclosed by the locking piece 223, the guide portion 2610 slidably pushes against the inner surface of the distal end of the locking piece 223, so that the proximal end of the locking piece 223 is elastically deformed to cause these locking pieces The interval between the distal ends of the 223 gradually increases, so that the radial size of the locking member 22d gradually becomes larger, so as to firmly clamp the inner wall of the elongated tube structure to lock the distal end of the elongated tube structure.

Please refer to FIGS. 18 to 21 together. The structure of the wire locking device provided by the seventh embodiment of the present application is similar to the structure of the first embodiment, except for the locking member 22e and the handle 50a in the seventh embodiment The structure of is different from that of the first embodiment. specifically:

The wire locking device in the seventh embodiment includes an inner core 261, a sleeve 265, and a locking member 22e. Wherein, the sleeve 265 is a steel sleeve, and the sleeve 265 is sleeved on the periphery of the inner core 261, that is, the inner core 261 is accommodated in the lumen of the sleeve 265. The length of the inner core 261 is greater than that of the sleeve 265. The sleeve 265 can The sleeve slides along the axial direction on the inner core 261.

The locking member 22e is a tube body with adjustable radial size sleeved on the periphery of the inner core 261; the sleeve 265 and the inner core 261 move relative to each other to change the force of the sleeve 265 pressing the tube body in the axial direction, thereby changing the tube body的radial dimension. In this embodiment, the tube body is a braided mesh tube with elasticity, the braided mesh tube is sleeved on the periphery of the inner core 261, and the distal end of the braided mesh tube may be fixed on the inner core 261 or not; The net tube is disposed adjacent to the distal end of the inner core 261 relative to the sleeve 265, that is, the braided net tube is sleeved on the outer periphery of the distal end of the inner core 261, and the sleeve 265 is sleeved on the outer periphery of the proximal end of the inner core 261.

The distal end of the inner core 261 is provided with a blocking portion 269 for preventing the braided net tube from sliding out of the distal end of the inner core 261. The diameter of the blocking portion 269 is larger than the diameter of the distal end of the braided net tube. The upper section of the steel sleeve is fixed by welding to obtain a blocking portion 269 with a slightly larger diameter.

The braided mesh tube has elasticity in both the axial and radial directions. It can be woven from wire-like metal such as stainless steel wire or nickel-titanium wire or made of polymer materials such as nylon. The two ends of the braided mesh tube made of metal are soldered. Take-up processing.

When the sleeve 265 moves distally relative to the inner core 261, it abuts against the proximal end of the braided mesh tube. Because the distal end of the braided mesh tube is blocked by the blocking portion 269 and cannot continue to move to the distal end, it has an elastic axial dimension of the braided mesh tube. As the squeezing of the sleeve 265 gradually becomes smaller, the radial dimension gradually increases, that is, the braided mesh tube expands in the radial direction, thereby abutting against the inner wall of the wire to lock the wire.

In a modified embodiment, the sleeve 265 is adjacent to the distal end of the inner core 261 relative to the locking member 22e, and the blocking portion 269 is provided at the proximal end of the locking member 22e. When the diameter of the locking member 22e is adjusted, the sleeve 265 compresses the locking member 22e from the distal end to the proximal end.

As shown in FIG. 21, since the diameters of the inner core 261 and the sleeve 265 are both small, it is not convenient to directly manipulate them in actual use. In this embodiment, in order to facilitate the operation of medical personnel, the wire locking device is also provided with a handle 50a. The handle 50a includes a first joint 57 and a second joint 58 that are movably connected. The first joint 57 is used to connect the inner core 261 and the second joint. Used to connect the sleeve 265. The first joint 57 is located at the proximal end of the second joint 58, the inner core 261 passes through the second joint 58 in the axial direction and then is connected to the first joint 57; the first joint 57 and the proximal end of the inner core 261 are welded, bonded, The second joint 58 is connected with the proximal end of the sleeve 265 by welding, bonding, screwing or clamping, etc. The first joint 57 and the second joint 58 are used for the operator's handheld control The relative movement of the inner core 261 and the sleeve 265.

In this embodiment, the first joint 57 and the second joint 58 are movably connected by threads or snaps. When the braided network tube does not need to expand, the first joint 57 and the second joint 58 are locked by threads or snaps. Synchronous movement, when the wire 500 needs to be locked, the first joint 57 and the second joint 58 are controlled to separate from each other, the sleeve 265 slides distally with respect to the inner core 261, and the force of the sleeve 265 squeezing the braided net tube increases, so that The braided mesh tube expands, that is, the axial size of the braided mesh tube decreases and the radial size increases until the braided mesh tube locks the inner wall of the wire 500 in the radial direction. After the wire 500 is locked by the braided network tube, the second joint 58 can be retracted to perform re-locking again.

Please refer to FIGS. 22 to 23 together. The structure of the wire locking device provided by the eighth embodiment of the present application is similar to that of the seventh embodiment. The locking member 22f in the eighth embodiment is a tube body, which is similar to that of the seventh embodiment. The difference is that the tube structure of the locking member 22f in the eighth embodiment is different from that in the seventh embodiment. Specifically: in the eighth embodiment, the locking member 22f is a heat-shrinkable tube, and the heat-shrinkable tube may be made of PTFE, FEP, PET and other materials.

It should be noted that, without departing from the principle of the embodiments of the present application, the specific technical solutions in the above embodiments may be mutually applicable, and will not be repeated here.

The above is the implementation of the embodiments of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the embodiments of the present application, several improvements and modifications can be made, and these improvements and modifications are also Treated as the scope of protection of this application.

Claims

A wire locking system, characterized in that the wire locking system comprises a conveying assembly and a locking piece, the locking piece is arranged on the conveying assembly and is used for inserting into the inner cavity of a wire, and the conveying assembly is used for adjusting The radial dimension of the locking member makes the locking member abut against the inner wall of the wire in the radial direction, and can drive the wire to move synchronously.
The wire locking system according to claim 1, wherein the conveying assembly includes an inner core and a sleeve sleeved on the inner core, and the locking member is provided on the inner core and the sleeve In between, the inner core and the sleeve move relative to each other, so that the force exerted by the inner core and the sleeve on the locking member for generating deformation changes, thereby adjusting the locking member in the radial direction. size of.
The wire locking system according to claim 2, wherein the locking member is provided on the periphery of the inner core, and the inner core and the sleeve move relative to each other in the axial direction, so that the end of the sleeve The force applied by the part to the locking member is changed, thereby adjusting the size of the locking member in the radial direction.
The wire locking system according to claim 3, wherein the locking member is at least one elastic piece sleeved on the inner core.
The wire locking system according to claim 4, wherein one end of the elastic piece is fixedly connected to the inner core, and the sleeve and the inner core move relative to each other in the axial direction so that the sleeve is pressed against the inner core. The force at the other end of the shrapnel changes.
The wire locking system according to claim 4, wherein the elastic sheet is provided with a plurality of through holes, the inner core is inserted into the plurality of through holes, and the sleeve is opposite to the inner core edge. The axial sliding causes the force of the end of the sleeve to squeeze the elastic sheet to change.
The wire locking system according to claim 6, wherein the elastic sheet is strip-shaped, the elastic sheet is provided with the plurality of through holes spaced along its length, and the inner core is inserted in the plurality of through holes in turn. Through hole.
The wire locking system according to claim 6, wherein the elastic sheet surrounds a ring or a partial ring, the peripheral wall of the elastic sheet is provided with the plurality of through holes, and the inner core is inserted into the plurality of elastic sheets. In the through hole.
The wire locking system according to claim 8, wherein the number of the elastic pieces is multiple, and the plurality of elastic pieces are arranged on the inner core in an axial direction, and the most distal elastic piece is fixedly connected to the inner core.述内芯。 The inner core.
The wire locking system according to claim 6, wherein a barb for inserting into the inner wall of the wire is provided between each two adjacent through holes of the elastic sheet.
The wire locking system according to claim 3, wherein the locking member is an elastic locking piece arranged on the inner core, the distal end of the locking piece is connected to the inner core, and the sleeve The barrel is adjacent to the proximal end of the inner core with respect to the locking member, the distal end of the sleeve is provided with a guide part, and there is a gap between the proximal end of the locking piece and the outer surface of the inner core, the The sleeve slides relative to the inner core, so that the position of the guide portion inserted into the gap is changed, thereby adjusting the radial size of the locking member.
The wire locking system according to claim 11, wherein a plurality of the locking pieces are arranged on the periphery of the distal end of the inner core, and the plurality of the locking pieces are arranged along the circumference of the inner core, and surround the inner core. A cavity that facilitates the insertion of the distal end of the sleeve.
The wire locking system according to claim 3, wherein the locking member is a tube body with an adjustable radial size sleeved on the periphery of the inner core, and the sleeve and the inner core move relative to each other, In order to change the force of the sleeve squeezing the tube body in the axial direction, the radial size of the tube body is changed.
The wire locking system according to claim 13, wherein the tube body is a braided mesh tube or heat shrinkable tube with elasticity.
The wire locking system according to claim 13, wherein the inner core is provided with a blocking part protruding, and the blocking part is used to abut one end of the tube body to limit the axial direction of the tube body. Range of motion.
The wire locking system according to claim 2, wherein the locking member is an elastic locking piece arranged on the sleeve, and the proximal end of the locking piece is connected to the distal end of the sleeve, The inner core and the sleeve move relative to each other in the axial direction, so that the distal end of the inner core squeezes the distal end of the locking piece, so that the locking piece is elastically deformed to change the radial dimension of the locking piece.
The wire locking system according to claim 16, wherein the distal end of the inner core is provided with a guide portion, the diameter of the guide portion gradually increases from the proximal end to the distal end, and the distal end of the locking piece There is a gap between the inner core and the outer surface of the inner core, and the inner core and the sleeve move relative to each other in the axial direction to change the position of the guide portion in the gap, thereby adjusting the diameter of the locking member. Upward dimensions.
The wire locking system according to claim 16, wherein a plurality of the locking pieces are provided at the distal end of the sleeve, and the plurality of locking pieces are arranged along the circumferential direction of the sleeve, and the plurality of locking pieces are arranged in the circumferential direction of the sleeve. The locking piece encloses an inner cavity that facilitates the insertion of the end of the inner core.
The wire locking system according to any one of claims 2 to 18, wherein the conveying assembly further comprises a positioning assembly arranged between the inner core and the sleeve, and the positioning assembly is used to restrict The relative movement between the inner core and the sleeve in the axial direction.
The wire locking system according to claim 19, wherein the positioning assembly comprises a first positioning member fixedly connected to the inner core and a second positioning member fixedly connected to the sleeve, the second positioning member The positioning member is cylindrical and encloses an inner cavity, and the first positioning member is used to insert the inner cavity of the second positioning member along the axial direction, so that the first positioning member and the second positioning member are fixed in together.
The wire locking system according to claim 20, wherein the outer peripheral surface of the first positioning member is provided with a plurality of clamping holes spaced along the axial direction, and the inner peripheral surface of the second positioning member is convexly provided with elastic clamps. The clamping block can be selectively clamped into any clamping hole, so that the first positioning member is positioned at different positions of the inner cavity of the second positioning member.
A wire locking device for taking out a slender tube structure implanted in the body, wherein the wire locking device comprises a handle and the wire locking system according to any one of claims 2-21, and The proximal end of the delivery component of the wire locking system is connected to the handle.
The wire locking device according to claim 22, wherein the handle comprises a first joint and a second joint movably connected, the first joint is used for connecting the inner core, and the second joint is used for Connect the sleeve.
23. The wire locking device according to claim 23, wherein the first joint and the second joint are screwed or clamped to each other.
The wire locking device according to claim 24, wherein the first connector includes a main body and a connector, the main body includes a threading cavity penetrating in an axial direction, and the second connector is clamped to the threading The distal end of the cavity is opened, the proximal end of the inner core extends from the distal end of the threading cavity to the proximal end of the threading cavity, the plug is inserted into the proximal opening of the threading cavity, and the The proximal end of the inner core is fixed between the plug and the main body.