Twisting aid

Abstract

The present invention relates to a torsion assisting tool that can be sleeved on a tubular medical device, especially a thin medical catheter. As long as the operator manually operates to make the base and the rotating sleeve move relative to each other axially, the flexible sleeve in the rotating sleeve can be compressed and deformed to firmly clamp the tubular medical device. Then, by operating the entire torsion assisting tool to rotate, the tubular medical device can be driven to rotate together, and the distal end of the tubular medical device can be screwed into the target tissue in the body to achieve the fixation of the distal end of the tubular medical device. Such an operation method is very simple and convenient, can reduce the difficulty of surgical operation, save the surgical operation time, and reduce the risk of patient infection.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a torsion assist tool for driving a tubular medical device to rotate. Background Art

[0002] With the continuous development of physiological pacing research and technological innovation, His bundle pacing has become a research hotspot in recent years. As Figure 1 shown, the His bundle electrode lead 1 with a small diameter for treating rhythm-related diseases has been widely used in clinics. The distal end of this His bundle electrode lead 1 has a helical electrode 2. Compared with other electrode leads, the helical electrode 2 of the His bundle electrode lead 1 is screwed into the myocardium to a deeper depth. If a conventional rotation tool is used, it cannot provide a large enough torque, thus unable to meet the screwing depth of the helical electrode 2. Therefore, currently, mainly the operator rotates the electrode body 3 by hand to transfer the torque to the head end (i.e., the distal end), so that the helical electrode 2 is screwed into the myocardium and fixed in the heart, realizing the mechanical and electrical connection between the electrode and the myocardium. In addition, since the diameter of the electrode body 3 of the His bundle electrode lead 1 is small, usually 1.0 mm to 1.5 mm, it is difficult for the operator to clamp the small electrode body 3 with fingers for rotational movement, increasing the operation difficulty. Coupled with the fact that the surface of the electrode body 3 usually has a lubricating coating, the operation becomes even more difficult. Summary of the Invention

[0003] To solve the above technical problems, the purpose of the present invention is to provide a torsion assist tool, which facilitates the operator to operate the tubular medical device to perform rotational movement with the help of the torsion assist tool during the operation, thereby reducing the operation difficulty of the surgery, shortening the operation time, and reducing the risk of patient infection.

[0004] To achieve the above purpose, a torsion assist tool provided by the present invention is used to be sleeved on a tubular medical device to drive the tubular medical device to rotate, and includes:

[0005] A rotating sleeve having an inner cavity;

[0006] A base having an axially penetrating first inner hole, a part of the base extends into the inner cavity from one end of the rotating sleeve, and the other part is disposed outside the rotating sleeve; and,

[0007] A flexible sleeve disposed in the inner cavity, the flexible sleeve is located between the other end of the rotating sleeve and the base, the flexible sleeve has an axially penetrating second inner hole, and the second inner hole is communicated with the first inner hole;

[0008] Wherein: the radial dimensions of the first inner hole and the second inner hole are both larger than the radial dimensions of the tubular medical device; when the rotating sleeve and the base move toward each other axially, the flexible sleeve clamps the tubular medical device after being squeezed axially and radially; and when the rotating sleeve and the base are located in a locking position, the rotating sleeve and the base remain relatively stationary.

[0009] Optionally, the flexible sleeve is in contact with the inner wall of the rotating sleeve.

[0010] Optionally, the torsion assisting tool further comprises a limiting structure for limiting a maximum distance between the base and the rotating sleeve when they move toward each other along the axial direction.

[0011] Optionally, the limiting structure comprises a protrusion arranged on the outer surface of the base, and the protrusion is used to abut against the rotating sleeve when the rotating sleeve and the base are located at the maximum contact position.

[0012] Optionally, the inner cavity of the rotating sleeve is provided with an internal thread, and the outer surface of the base is provided with an external thread matching the internal thread.

[0013] Optionally, the inner cavity of the rotating sleeve is provided with a slot, and the outer surface of the base is provided with a protrusion that matches the slot.

[0014] Optionally, a step surface is provided in the inner cavity, and one end of the flexible sleeve facing away from the base abuts against the step surface.

[0015] Optionally, an outer surface of the base and / or the rotating sleeve is provided with an anti-slip structure.

[0016] Optionally, an anti-slip structure is provided on the inner surface of the rotating sleeve that cooperates with the flexible sleeve.

[0017] Optionally, an anti-slip structure is provided on the inner surface and / or outer surface of the flexible sleeve.

[0018] Optionally, the flexible sleeve, the rotating sleeve and the base are coaxially arranged.

[0019] The torsion assist tool of the present invention can be sleeved on a tubular medical device, especially a thin medical catheter. As long as the operator manually operates to make the base and the rotating sleeve move axially towards each other, the flexible sleeve in the rotating sleeve will first be axially compressed to generate axial deformation. When the axial deformation of the flexible sleeve reaches a certain degree, since the flexible sleeve is radially constrained by the rotating sleeve, when the flexible sleeve continues to be axially compressed, the radial dimension of the second inner hole of the flexible sleeve will finally become smaller and firmly clamp the tubular medical device. Then, by operating the entire torsion assist tool to rotate, the tubular medical device can be driven to rotate together, and the anchoring mechanism (such as a helical electrode) at the distal end of the tubular medical device can be screwed into the target tissue in the body to achieve the fixation of the distal end of the tubular medical device. Such an operation method is very simple and convenient, which can reduce the difficulty of surgical operation, save surgical operation time, and reduce the risk of patient infection. Moreover, the torsion assist tool of the present invention has a simple structure, low use cost, and the flexible sleeve has a soft contact with the tubular medical device, which is not easy to damage the tubular medical device and has good reliability.

[0020] The torsion assist tool of the present invention further includes a limiting structure for limiting the maximum distance when the base and the rotating sleeve move axially towards each other. Thus, the axial deformation amount and radial deformation amount of the flexible sleeve after being axially compressed and radially compressed can be limited by the maximum distance, effectively ensuring that the flexible sleeve can provide a large enough clamping force to the tubular medical device and guaranteeing the reliability of the clamping. Description of the Drawings

[0021] The drawings are used to better understand the present invention and do not constitute an improper limitation to the present invention. Among them:

[0022] Figure 1 is a schematic structural diagram of a His bundle electrode lead in the prior art;

[0023] Figure 2 is a perspective view of the torsion assist tool in the embodiment of the present invention;

[0024] Figure 3 is an axial sectional view of the torsion assist tool in the embodiment of the present invention;

[0025] Figure 4 is a partial structural schematic diagram of the rotating sleeve in the embodiment of the present invention;

[0026] Figure 5 is a perspective view of the flexible sleeve in the embodiment of the present invention.

[0027] The description of the reference numerals is as follows:

[0028] His bundle electrode lead 1; helical electrode 2; electrode body 3;

[0029] Twisting assist tool 10; rotating sleeve 11; inner cavity 111; stepped surface 112; anti-slip teeth 113; base 12; first inner hole 121; protruding portion 122; flexible sleeve 13; second inner hole 131; fixed teeth 132; anti-slip structure 14.

[0030] The same reference numerals in the drawings denote the same or similar components. Detailed implementation manners

[0031] To make the objectives, advantages and features of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It should be noted that the drawings are all in a very simplified form and use non-precise scales, and are only used to facilitate and clearly assist in explaining the objectives of the embodiments of the present invention.

[0032] As used in this specification, the singular forms "a", "an" and "the" include plural objects unless the context clearly indicates otherwise. As used in this specification, the term "or" is generally used in the sense of including "and / or" unless the context clearly indicates otherwise. As used in this specification, the term "plural" is generally used in the sense of including "at least two" unless the context clearly indicates otherwise. As used in this specification, the terms "proximal end" and "tail end" generally refer to the end close to the instrument operator, and the terms "distal end" and "head end" generally refer to the end far from the instrument operator.

[0033] Figure 2 is a perspective view of the twisting assist tool provided by an embodiment of the present invention, Figure 3 is an axial sectional view of the twisting assist tool provided by an embodiment of the present invention, Figure 4 is a partial structural schematic diagram of the rotating sleeve provided by an embodiment of the present invention, Figure 5 is a perspective view of the flexible sleeve provided by an embodiment of the present invention.

[0034] As Figures 2 to 5 shown, an embodiment of the present invention provides a twisting assist tool 10, which is used to be sleeved on a tubular medical device to drive the tubular medical device to rotate, so as to facilitate the distal end of the tubular medical device to be screwed into the target tissue for fixation by rotational movement. It should be understood that the tubular medical devices involved in the present invention include but are not limited to electrode leads, and may also be other medical devices, such as electrophysiological catheters. The electrophysiological catheter may be an ablation catheter or a mapping catheter. In addition, the electrode lead includes but is not limited to a His bundle electrode lead, and as long as the diameter is small (such as a diameter of 1.0 mm to 1.5 mm) and it is difficult for the operator to directly operate its rotation by hand, the twisting assist tool 10 of the present invention can be used.

[0035] In the following description, the electrode lead of a tubular medical device is used as an example to further illustrate the torsion assist tool 10 of the present invention. However, the electrode lead should not be used to limit the present invention.

[0036] The torsion assist tool 10 includes a rotating sleeve 11, a base 12, and a flexible sleeve 13. The rotating sleeve 11 has an inner cavity 111 (see Figure 4 ). The base 12 has a first inner hole 121 that penetrates axially (see Figure 3 ). The flexible sleeve 13 has a second inner hole 131 that penetrates axially (see Figure 5 ). The flexible sleeve 13 is disposed in the inner cavity 111 of the rotating sleeve 11. The flexible sleeve 13 can be fixed in the inner cavity 111 by adhesive bonding, or the flexible sleeve 13 and the inner cavity 111 can be fixed by interference fit. The interference fit between the flexible sleeve 13 and the inner cavity 11 means that the outer diameter of the flexible sleeve 13 is greater than the inner diameter of the inner cavity 111, so that the flexible sleeve 13 is inserted into the inner cavity 111 by elastic deformation.

[0037] In addition, a part of the base 12 is inserted into the inner cavity 111 from one end of the rotating sleeve 11, and the other part is disposed outside the rotating sleeve 11. And when the base 12 is inserted into the rotating sleeve 11, the flexible sleeve 13 is located between the other end of the rotating sleeve 11 and the base 12, and the first inner hole 121 communicates with the second inner hole 131.

[0038] Further, the base 12, the rotating sleeve 11, and the flexible sleeve 13 are coaxially arranged so that the self-rotation axis of the electrode lead coincides with the self-rotation axis of the torsion assist tool 10, thereby driving the distal end of the electrode lead to perform a self-rotation movement through the torsion assist tool 10. In other embodiments, the self-rotation axis of the electrode lead and the self-rotation axis of the torsion assist tool 10 may not coincide, as long as the torsion assist tool 10 can drive the electrode lead to rotate when it rotates.

[0039] In addition, the inner diameter (i.e., the radial dimension) of the first inner hole 121 is greater than the outer diameter (i.e., the radial dimension) of the electrode lead to facilitate the electrode lead to pass through the base 12. Additionally, in the initial state, the inner diameter of the second inner hole 131 is greater than the outer diameter of the electrode lead to facilitate the electrode lead to pass through the flexible sleeve 13. And in the compressed state, that is, when the flexible sleeve 13 is axially and radially squeezed to generate axial and radial deformations, the inner diameter of the second inner hole 131 becomes smaller, so that the flexible sleeve 13 clings to the surface of the electrode lead to clamp the electrode lead.

[0040] The specific working principle is as follows: When the torsion assist tool 10 is in an unlocked position, the rotating sleeve 11 and the base 12 can move axially towards each other (i.e., approach each other), causing the flexible sleeve 13 to undergo radial deformation after being subjected to the axial extrusion force applied by the rotating sleeve 11 and the base 12. When the radial deformation of the flexible sleeve 13 is restricted by the inner cavity of the rotating sleeve 11, the flexible sleeve 13 will also be subjected to the radial extrusion force applied by the rotating sleeve 11. Therefore, the inner diameter of the second inner hole 131 will ultimately become smaller. It should be understood that when the flexible sleeve 13 is not subjected to axial and radial extrusion forces, the inner diameter of the second inner hole 131 is larger than the outer diameter of the electrode lead. Further, when the flexible sleeve 13 is subjected to axial and radial extrusion forces, the electrode lead can be clamped through the reduced second inner hole 131. At this time, the torsion assist tool 10 is also in a locked position, locking the rotating sleeve 11 and the base 12 and keeping them relatively stationary. After the electrode lead is clamped by the flexible sleeve 13, the operator can manually rotate the entire torsion assist tool 10, which can drive the electrode lead to rotate together. After the distal end of the electrode lead (such as a helical electrode) is screwed into the target tissue (such as the myocardium) for fixation, the rotation operation is stopped. Then, the torsion assist tool 10 is changed from the locked position to the unlocked position, enabling the rotating sleeve 11 and the base 12 to move axially away from each other (i.e., move away from each other), thereby relieving the axial extrusion force applied by the base 12 and the rotating sleeve 11 on the flexible sleeve 13 and relieving the radial extrusion force applied by the rotating sleeve 11 on the flexible sleeve 13, so that the flexible sleeve 13 releases the clamping of the electrode lead. Thereafter, the entire torsion assist tool 10 can be removed from the electrode lead. It should be noted that during the axial movement of the rotating sleeve 11 and the base 12 towards or away from each other, one of them can remain stationary while the other moves, or both can move simultaneously.

[0041] In some embodiments, the outer surface of the flexible sleeve 13 can be pre - attached to the side wall corresponding to the inner cavity 111, so that the flexible sleeve 13 can directly undergo radial deformation after being axially compressed, and the radial deformation is relatively fast. At this time, after the flexible sleeve 13 is axially compressed, the radial dimension of the second inner hole 131 directly becomes smaller, enabling the flexible sleeve to quickly clamp the electrode lead and making it more convenient for the physician to rotate the electrode lead. In other embodiments, the outer surface of the flexible sleeve 13 may not be attached to the side wall of the inner cavity 111. At this time, after the flexible sleeve 13 is axially compressed, it first undergoes radial deformation towards the side wall of the inner cavity 111 until the outer surface of the flexible sleeve 13 is attached to the side wall of the inner cavity 111 before being subjected to the radial extrusion force. Therefore, the radial dimension of the second inner hole 131 of the flexible sleeve 13 first becomes larger. When the flexible sleeve 13 continues to be axially compressed, the flexible sleeve 13 is attached to the inner wall of the rotating sleeve. At this time, if the flexible sleeve 13 continues to be axially compressed, due to the restraint of the rotating sleeve, the radial dimension of the second inner hole 131 becomes smaller again.

[0042] It should be noted that after the torsion assist tool 10 of the present invention is sleeved on the electrode wire, it is arranged outside the body, such as subcutaneously, without entering the blood vessel. Therefore, the outer diameter of the torsion assist tool 10 is not limited, as long as it is convenient for the operator to hold it with both hands. More specifically, when the torsion assist tool 10 of the present invention is applied to Figure 1 the His bundle electrode wire 1 shown, the torsion assist tool 10 is sleeved on the electrode body 3 and is arranged adjacent to the connector, and the connector here is used to connect the pacemaker.

[0043] Therefore, after using the torsion assist tool 10 of the present invention, the operator only needs to manually operate to make the base 12 and the rotating sleeve 11 move axially towards each other, so that the flexible sleeve 13 in the rotating sleeve 11 deforms and firmly clamps the electrode wire. And after clamping the electrode wire, the operator then operates the entire torsion assist tool 10 to rotate, which can drive the electrode wire to rotate together, and screw the distal end of the electrode wire into the target tissue in the body to achieve the fixation of the distal end of the electrode wire. Such an operation method is very simple and convenient, can reduce the difficulty of surgical operation, save surgical operation time, and reduce the risk of patient infection. Moreover, the torsion assist tool 10 of the present invention has a simple structure, low use cost, and the flexible sleeve 13 has a soft contact with the electrode wire, is not easy to damage the electrode wire, and the reliability of the instrument is good.

[0044] Furthermore, the torsion assist tool 10 further includes a limiting structure for limiting the maximum distance when the base 12 and the rotating sleeve 11 move axially towards each other, so as to limit the axial deformation amount and radial deformation amount of the flexible sleeve 13 after being axially compressed and radially compressed through the maximum distance, and ensure that the flexible sleeve 13 has sufficient clamping force on the electrode wire under the limited axial deformation amount and radial deformation amount, so as to ensure the reliability of the clamping. The present invention does not limit the value of the maximum distance, and can be set according to the actual clamping needs. Further, the limiting structure includes a protrusion 122 (refer to Figure 3 ) provided on the outer surface of the base 12, and the protrusion 122 is used to abut against the rotating sleeve 11 after the rotating sleeve 11 and the base 12 are in the maximum contact position. More specifically, when the rotating sleeve 11 and the base 12 approach each other axially, when the distal end surface of the protrusion 122 abuts against the proximal end surface of the rotating sleeve 11, the movement stops, and this position is the maximum contact position when the two approach each other, and is also the locking position of the torsion assist tool 10.

[0045] Furthermore, the present invention does not particularly limit the locking method between the rotating sleeve 11 and the base 12, including but not limited to screw connection or snap connection. In this embodiment, the rotating sleeve 11 and the base 12 are connected by screw fitting, that is Figures 2 to 5As shown, at this time, an internal thread is provided in the inner cavity 111 of the rotating sleeve 11, and an external thread matching the internal thread is provided on the outer surface of the base 12. Further, the entire inner surface of the inner cavity 111 may be provided with an internal thread, or only a part of the inner surface may be provided with an internal thread. If the entire inner surface of the inner cavity 111 is provided with an internal thread, the inner surface of the inner cavity 111 that cooperates with the flexible sleeve 13 also has an internal thread. The internal thread can increase the friction force and prevent the flexible sleeve 13 from slipping when it cooperates with the inner cavity 111, making it more difficult for the flexible sleeve 13 to move. If only a part of the inner surface of the inner cavity 111 is provided with an internal thread, these internal threads mainly cooperate with the external thread on the base 12. Therefore, through the relative rotational movement of the base 12 and the rotating sleeve 11, the base 12 and the rotating sleeve 11 move closer to or away from each other along the axial direction.

[0046] In an alternative embodiment, the rotating sleeve 11 and the base 12 may also be snap-connected. Further, a clamping groove is provided in the inner cavity 111 of the rotating sleeve 11, and a protrusion matching the clamping groove is provided on the outer surface of the base 12. The present invention does not limit the specific manner of snap connection (such as shape, quantity), as long as it is convenient for unlocking and locking. It should be understood that when the rotating sleeve 11 and the base 12 are thread-locked or snap-locked, the rotating sleeve 11 and the base 12 are in the locked position; conversely, when the threaded connection or snap connection between the rotating sleeve 11 and the base 12 is released, the rotating sleeve 11 and the base 12 are in the unlocked position. For example, keep the rotating sleeve 11 stationary and rotate the base 12 clockwise relative to the rotating sleeve 11 until it is thread-locked, so that the two are in the locked position. Conversely, keep the rotating sleeve 11 stationary and rotate the base 12 counterclockwise relative to the rotating sleeve 11 to release the threaded connection between the two and make them in the unlocked position. If the rotating sleeve 11 and the base 12 are snap-connected, they can also be locked or unlocked through a similar operation method.

[0047] Further referring to Figure 3 and Figure 4 , a stepped surface 112 is provided in the inner cavity 111, and one end of the flexible sleeve 13 facing away from the base 12 can abut against the stepped surface 112, which is convenient for the rotating sleeve 11 to press the flexible sleeve 13 through the stepped surface 112. Here, "abutment" includes that one end of the flexible sleeve 13 only abuts against the stepped surface 112, that is, the two are not connected, and "abutment" can also include that one end of the flexible sleeve 13 is connected to the stepped surface 112.

[0048] Further referring to Figure 2, an anti-slip structure 14 is provided on the outer surface of the rotating sleeve 11 and / or the base 12. The function of the anti-slip structure 14 is to increase the friction between the fingers and these components when the fingers clamp the rotating sleeve 11 and the base 12 and rotate, prevent slipping, and make the operation more convenient. Further, the anti-slip structure 14 can be an anti-slip groove, or an anti-slip protrusion, or an anti-slip coating that increases friction, and the specific form is not limited. In this embodiment, the anti-slip structure 14 is preferably an anti-slip groove, and the groove width (width along the circumference) of the anti-slip groove can be selected from 0.5 mm to 5.0 mm, and the groove depth can be selected from 0.1 mm to 2.0 mm. The number of the anti-slip grooves is preferably multiple, such as 2 to 20, and the multiple anti-slip grooves are preferably arranged evenly along the circumference. Further, the shapes of the rotating sleeve 11 and the base 12 are preferably circular, and more preferably the outer diameters of the rotating sleeve 11 and the base 12 are the same.

[0049] Return to refer Figure 4 , an anti-slip tooth 113 (i.e., an anti-slip structure) is preferably provided on the inner surface of the inner cavity 111 of the rotating sleeve 11 that cooperates with the flexible sleeve 13. The function of the anti-slip tooth 113 is to prevent the flexible sleeve 13 from slipping when the outer surface of the flexible sleeve 13 cooperates with the inner surface of the rotating sleeve 11, ensure that the flexible sleeve 13 is not easily moved, and ensure the reliability of the operation. The tooth width (width along the circumference) of the anti-slip tooth 113 can be selected from 0.5 mm to 5.0 mm, and the tooth height can be selected from 0.1 mm to 2.0 mm. The number of the anti-slip teeth 113 is preferably multiple, such as 2 to 20, and the multiple anti-slip teeth 113 are preferably arranged evenly along the circumference of the inner cavity 111. It should be noted that in other embodiments, an anti-slip groove (i.e., an anti-slip structure) can also be used to replace the anti-slip tooth 113.

[0050] Further refer to Figure 5 , a fixing tooth 132 (i.e., an anti-slip structure) is preferably provided on the inner surface of the flexible sleeve 13. By providing the fixing tooth 132 on the inner surface of the flexible sleeve 13, the clamping force can be increased, making the electrode wire less likely to fall off. Further, an anti-slip structure can also be provided on the outer surface of the flexible sleeve 13 to increase the friction between the flexible sleeve 13 and the rotating sleeve 11, making the flexible sleeve 13 less likely to fall off and move. The fixing tooth 132 can be a concave tooth or a convex tooth. The tooth width (width along the circumference) of the fixing tooth 132 can be selected from 0.5 mm to 5.0 mm, and the tooth depth can be selected from 0.1 mm to 2.0 mm. The number of the fixing teeth 132 is preferably multiple, for example, 2 to 20. More preferably, the fixing teeth 132 are arranged evenly along the circumference of the second inner hole 131. It should be understood that anti-slip structures (such as fixing teeth) can be provided on both the inner surface and the outer surface of the flexible sleeve 13, or only one of them can be provided with an anti-slip structure.

[0051] Furthermore, the materials of the rotating sleeve 11 and the base 12 are preferably medical-grade plastics, such as polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), polyurethane, polyamide, etc. The processing method of the rotating sleeve 11 and the base 12 is preferably injection molding. The material of the flexible sleeve 13 can be thermoplastic elastomer (TPE), silicone, etc., and is not specifically limited. Here, the material of the flexible sleeve 13 is relatively soft, capable of deforming under tension or compression, and the flexible sleeve 13 can restore its original shape after the acting force is removed. The processing method of the flexible sleeve 13 is preferably hot pressing. In addition, the inner diameter of the first inner hole 121 is not limited. Additionally, in the initial state, the inner diameter of the second inner hole 131 is also not limited, as long as it is convenient for the electrode wire or other medical catheters to be inserted into the first inner hole 121 and the second inner hole 131. Exemplarily, the inner diameter of the second inner hole 131 of the flexible sleeve 13 can be 1.0 mm to 5.0 mm.

[0052] Next, a preferred embodiment will be combined to further illustrate the operation method of the torsion assist tool 10 of the present invention for better understanding of the present invention.

[0053] Taking the threaded fit between the base 12 and the rotating sleeve 11, and the electrode wire being a His bundle electrode wire as an example. In actual application, first insert the tail end (i.e., the proximal end) of the His bundle electrode wire into the torsion assist tool 10, and make the torsion assist tool 10 located at the electrode body position of the His bundle electrode wire. Then, use the fingers of the left and right hands to clamp the rotating sleeve 11 and the base 12 respectively and make a rotating motion to make the two approach axially. At this time, the two end faces of the flexible sleeve 13 are axially compressed and deformed, and under the action of the radial compression force, the inner hole of the flexible sleeve 13 becomes smaller and tightly adheres to the outer surface of the electrode body. After ensuring that the flexible sleeve 13 has sufficient clamping force on the electrode body, stop rotating. Then rotate the rotating sleeve 11 and make the electrode body rotate together until the spiral electrode at the head end of the His bundle electrode wire is screwed into the myocardium to complete the fixation. Next, just rotate the rotating sleeve 11 and the base 12 in the reverse direction to completely disconnect the threaded connection, and then withdraw the rotating sleeve 11, the base 12, and the flexible sleeve 13 from the tail end of the His bundle electrode wire.

[0054] It should be noted that the preferred embodiment of the present invention is as described above, but is not limited to the scope disclosed in the above embodiments. For example, the above embodiments have described in detail the locking method of the base and the rotating sleeve and the limiting method of the limiting structure. Of course, the present invention includes but is not limited to the locking methods and limiting methods listed in the above embodiments. Any content obtained by changing on the basis of the locking methods and limiting methods provided in the above embodiments belongs to the scope protected by the present invention. Those skilled in the art can draw inferences from one instance to another based on the content of the above embodiments.

[0055] The above description is only a description of the preferred embodiments of the present invention and does not limit the scope of the present invention in any way. Any changes and modifications made by those of ordinary skill in the art of the present invention based on the above disclosure shall fall within the protection scope of the present invention.

Claims

1. A torsion assisting tool is sleeved on an electrode body of an electrode lead to drive the electrode lead to rotate, and is characterized in that Comprising: A rotating sleeve having an inner cavity; A base having a first inner hole axially penetrating therethrough, a part of the base extending into the inner cavity from one end of the rotating sleeve, and another part being disposed outside the rotating sleeve; and, A flexible sleeve disposed in the inner cavity, the flexible sleeve being located between the other end of the rotating sleeve and the base, the flexible sleeve having a second inner hole axially penetrating therethrough, and the second inner hole communicating with the first inner hole; Wherein: the inner diameter of the first inner hole is greater than the outer diameter of the electrode wire; in the initial state, the inner diameter of the second inner hole is greater than the outer diameter of the electrode wire; when the rotating sleeve and the base move axially towards each other, the flexible sleeve is axially and radially squeezed to generate axial deformation and radial deformation, so that the inner diameter of the second inner hole becomes smaller, and further the flexible sleeve clamps the electrode body through the smaller second inner hole, and when the rotating sleeve and the base are located at a locking position, the rotating sleeve and the base remain relatively stationary.

2. The torsion assist tool according to claim 1, wherein The flexible sleeve fits against the inner wall of the rotating sleeve.

3. The torsion assist tool according to claim 1, characterized in that, The torsion assist tool further includes a limiting structure for defining the maximum distance when the base and the rotating sleeve move axially towards each other.

4. The torsion assisting tool according to claim 3, characterized in that, The limiting structure includes a protrusion provided on the outer surface of the base, and the protrusion is used to abut against the rotating sleeve after the rotating sleeve and the base are in the maximum contact position.

5. The torsional assistance tool according to any one of claims 1-4, characterized in that, The inner cavity of the rotating sleeve is provided with internal threads, and the outer surface of the base is provided with external threads that cooperate with the internal threads.

6. The torsion assist tool according to any one of claims 1-4, characterized in that The inner cavity of the rotating sleeve is provided with a groove, and the outer surface of the base is provided with a protrusion that cooperates with the groove.

7. The torsion assist tool according to any one of claims 1-4, characterized in that, A stepped surface is provided in the inner cavity, and one end of the flexible sleeve facing away from the base abuts against the stepped surface.

8. The torsion assist tool according to any one of claims 1-4, characterized in that, The outer surface of the base and / or the rotating sleeve is provided with an anti-slip structure.

9. The torsional assistance tool according to any one of claims 1-4, characterized in that, The inner surface of the rotating sleeve that cooperates with the flexible sleeve is provided with an anti-slip structure.

10. The torsion assist tool according to any one of claims 1-4, characterized in that, The inner surface and / or the outer surface of the flexible sleeve is provided with an anti-slip structure.

11. The torsional assistance tool according to any one of claims 1-4, characterized in that, The flexible sleeve, the rotating sleeve and the base are coaxially arranged.

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