Shaping wire and ablation catheter

Abstract

The utility model relates to the technical field of medical instruments, and discloses a shaping wire and an ablation catheter, the shaping wire comprises a flexible unit, one end of the flexible unit is used for being connected with the ablation catheter, and the flexible unit is used for adjusting the bending degree under the action of external force; the section is made in the direction perpendicular to the axis of the flexible unit, and the flexible unit is polygonal. According to the utility model, the section is made along the direction perpendicular to the axis of the flexible unit, and the flexible unit is polygonal. On the basis, compared with the prior art that the cross section is made in the direction perpendicular to the axis of the shaping wire, and the cross section of the shaping wire is circular, stress concentration positions exist at the corners of the polygon, and meanwhile, the bending resistance of the polygon is lower than that of a circle; and the external force required for driving the flexible unit to deform in the shaping yarn is smaller than the external force required in the related technology, so that the technical effect of improving the simplicity and convenience of deformation of the shaping yarn is achieved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to shaping wires and ablation catheters. Background Technology

[0002] In treating arrhythmias such as atrial fibrillation, doctors use an ablation catheter inserted into a specific part of the heart chamber via a vein or artery to release radiofrequency current, causing coagulative necrosis of the local endocardium and subendocardial myocardium, thereby blocking the abnormal conduction bundle and origin of the rapid arrhythmia.

[0003] During this process, the ablation catheter prevents abnormal electrical signals from being transmitted from the pulmonary veins to the heart, thereby reducing the occurrence of arrhythmias. Simultaneously, the ablation catheter can extract electrophysiological signals from the pulmonary veins to assess the effectiveness of pulmonary vein electrical isolation. The ablation catheter includes:

[0004] The shaping wire is a flexible structure. Its distal end is a spiral-shaped curved section, and its proximal end is a straight section. External force is applied to the straight section, thereby adjusting the spiral diameter of the curved section and thus the bending shape of the shaping wire. A cross-section perpendicular to the axial direction of the shaping wire is circular. The distal end is the one that penetrates into the patient's body, and the proximal end is the one closest to the medical staff.

[0005] The ablation unit has a straight proximal end and a ring-shaped distal end. A channel is located within the ablation unit, and a guide wire is placed within the channel. The distal end of the ablation unit corresponds to the curved portion of the guide wire, and the proximal end corresponds to the straight portion of the guide wire. This allows the shape of the ablation unit to change with the shape of the guide wire. Based on this, the ablation unit can be adapted to blood vessels of different sizes by adjusting the guide wire.

[0006] Multiple electrodes are provided, spaced apart at the distal end of the ablation unit. The electrodes are electrically connected to an external power source and are used to collect electrophysiological signals from the pulmonary veins.

[0007] The control handle has one end electrically connected to the electrocardiogram (ECG) recording device via a wire to monitor the electrophysiological signals of the pulmonary veins. The other end of the control handle is connected to the proximal end of the shaping wire to adjust the curvature of the wire to accommodate myocardial tissue of different sizes. However, during the adjustment of the curvature of the shaping wire, because the wire is cylindrical (i.e., its cross-section along the axis perpendicular to the ablation unit is circular), the circular structure has symmetry and therefore lacks stress concentration points. This results in the user needing to expend considerable force to adjust the curvature of the wire, increasing the difficulty of adjusting the curvature. Utility Model Content

[0008] In view of this, the present invention provides a shaping wire and an ablation catheter to solve the problem that in existing ablation catheters, users need to expend a lot of force when operating the shaping wire, which increases the difficulty of adjusting the bending degree of the ablation catheter.

[0009] In a first aspect, this utility model provides a shaping wire for adjusting the curvature of an ablation catheter, the shaping wire comprising:

[0010] A flexible unit, one end of which is used to connect to the ablation catheter, is used to adjust the degree of bending under external force;

[0011] A cross-section is taken along the direction perpendicular to the axis of the flexible unit, and the flexible unit is polygonal.

[0012] Beneficial effects: By taking a cross-section along the axis perpendicular to the flexible unit, the flexible unit becomes a polygon. Based on this, compared to related technologies where the cross-section is taken along the axis perpendicular to the shaping wire, resulting in a circular cross-section, the polygonal corners in this invention present stress concentration points. Furthermore, the bending resistance of a polygon is lower than that of a circle, making the external force required to drive the deformation of the flexible unit in this shaping wire less than that required in related technologies. This achieves the technical effect of improving the ease of deformation of the shaping wire.

[0013] In one alternative embodiment, the flexible unit has a quadrilateral cross-section.

[0014] Beneficial effects: Compared to the triangular cross-section of flexible elements, limiting the cross-section of flexible elements to quadrilaterals increases the number of corners, thereby increasing the locations of stress concentration in the flexible elements and ultimately improving the ease of deformation of the shaping wire. Compared to the fact that the cross-section of flexible elements can be a polygon with more sides, limiting the cross-section of flexible elements to quadrilaterals improves the ease of processing the flexible elements.

[0015] In one alternative embodiment, the lengths of adjacent sides in the cross-section of the flexible unit are not equal.

[0016] Beneficial effects: By limiting the lengths of adjacent sides to be unequal, the restrictions on the cross-sectional shape of the flexible unit can be reduced, thereby achieving the technical effect of improving the ease of processing the flexible unit.

[0017] In one alternative embodiment, the shaping yarn includes a support unit connected to the other end of the flexible unit for supporting the flexible unit.

[0018] Beneficial effects: When adjusting the bending degree of the shaping yarn, the support unit can improve the stability of the flexible unit during the bending degree adjustment process, so that the flexible unit only moves around the support unit to shrink or expand, avoiding the flexible unit from deflecting in other directions during the adjustment process, thereby achieving the technical effect of improving the stability of the bending degree adjustment of the flexible unit.

[0019] In one alternative embodiment, the support unit includes a curved portion and a straight portion, one end of the curved portion being connected to the proximal end of the flexible unit, and the other end of the curved portion being connected to the straight portion, for supporting the flexible unit.

[0020] Beneficial effects: By incorporating the curved section, the flexible unit can better support itself during bending adjustments. When the flexible unit tends to deflect in other directions during adjustment, the shear resistance of the curved section can resist the deflection force, thereby improving the stability of the flexible unit's bending adjustment. By incorporating the straight section, the shape of the shaping wire can be adapted to the shape of the ablation catheter.

[0021] In one alternative embodiment, the flexible unit and the curved portion are spiral-shaped.

[0022] Beneficial effects: By defining the flexible unit as a spiral shape, the bending degree of the shaping filament can be adjusted when an external force drives the flexible unit away from the bending portion, thereby improving the ease of adjusting the bending degree of the shaping filament. Simultaneously, defining the bending portion as a spiral shape improves the smoothness of the connection between the flexible unit and the bending portion, and enhances the supporting force of the bending portion on the flexible unit.

[0023] In one optional embodiment, the maximum radius of the helix formed by the curved portion is not less than the maximum radius of the helix formed by the flexible unit;

[0024] And / or, the helical shafts of the flexible unit and the curved portion are both located on the same straight line as the straight portion.

[0025] Beneficial effects: By limiting the maximum radius of the helix formed by the curved section to be no less than the maximum radius of the helix formed by the flexible unit, the curved section can better support the flexible unit, thereby improving the reliability of the support unit.

[0026] When adjusting the curvature of the flexible unit, the straight section can be positioned on the axis of the blood vessel, allowing the flexible unit to be coaxially aligned with the blood vessel. This ensures comprehensive adhesion between the ablation catheter and the blood vessel. Furthermore, the flexible unit can be adjusted to either shrink or expand around the straight section, ensuring that the adjustment of the flexible unit will not damage the mitral and tricuspid valves while also ensuring comprehensive ablation of the blood vessel and detection of electrophysiological signals by the ablation catheter.

[0027] In one optional embodiment, a cross-section is made along a direction perpendicular to the axis of the flexible unit, and the cross-sectional dimension of the support unit is larger than that of the flexible unit.

[0028] And / or, the support unit is circular, with a cross-section along a direction perpendicular to the axis of the flexible unit;

[0029] And / or, the support unit is welded to or integrally formed with the flexible unit;

[0030] And / or, the surface of the support unit is provided with a second lubrication structure;

[0031] And / or, the support unit is a nickel-titanium bowwire.

[0032] Beneficial effects: By defining the cross-section along a direction perpendicular to the axis of the flexible unit, the cross-sectional dimensions of the support unit are larger than those of the flexible unit. Based on this, the shear resistance of the support unit can be improved, thereby enhancing the reliability of the support unit in supporting the flexible unit.

[0033] Furthermore, by defining the cross-section along the axis perpendicular to the flexible unit, the support unit is circular. This improves the smoothness of the guide wire's insertion within the receiving channel, thereby enhancing the ease of sliding connection between the guide wire and the ablation catheter. Simultaneously, depending on the design of the guide wire, the support unit can be welded to or integrally formed with the flexible unit, thus increasing the diversity of connection methods between the support unit and the flexible unit.

[0034] Furthermore, the second lubrication structure can reduce the friction between the support unit and the receiving channel, thereby improving the ease of inserting the shaping wire into the ablation catheter.

[0035] In one alternative embodiment, the surface of the flexible unit is provided with a first lubrication structure;

[0036] And / or, the flexible unit is a nickel-titanium bowwire.

[0037] Beneficial effects: The first lubrication structure reduces the friction between the flexible unit and the receiving channel, thereby improving the ease of inserting the shaping wire into the ablation catheter. Simultaneously, the shape memory function of the nickel-titanium alloy in the flexible unit enhances the ease of the shaping wire returning to its original shape, i.e., the spiral shape.

[0038] Secondly, this utility model also provides an ablation catheter, comprising:

[0039] The ablation unit includes an ablation structure, which is a flexible structure and has a receiving channel.

[0040] The aforementioned shaping wire is disposed within the receiving channel and is used to adjust the curvature of the ablation unit.

[0041] Beneficial effects: Since the ablation catheter includes a shaping wire, it has the same effect as the shaping wire, which will not be elaborated here. Attached Figure Description

[0042] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of the structure of the shaping yarn in this embodiment;

[0044] Figure 2 for Figure 1 A top view of the shaping yarn shown;

[0045] Figure 3 This is a schematic diagram of the ablation catheter in this embodiment;

[0046] Figure 4 This is a schematic diagram of the connection between the ablation unit and the electrode in the ablation catheter of this embodiment.

[0047] Explanation of reference numerals in the attached figures:

[0048] 1. Flexible unit; 101. Proximal end of flexible unit;

[0049] 2. Support unit; 201. Bending section; 202. Straight section;

[0050] 3. Ablation unit; 4. Electrode. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0052] The following is combined Figures 1 to 4 The following describes embodiments of the present invention.

[0053] According to an embodiment of the present invention, in one aspect, a shaping wire is provided for adjusting the curvature of the ablation catheter. The shaping wire includes:

[0054] Flexible unit 1, one end of which is used to connect to the ablation catheter, is used to adjust the degree of bending under external force;

[0055] A cross-section is made along the direction perpendicular to the axis of flexible element 1. Flexible element 1 is a polygon.

[0056] In this embodiment, the shaping wire has a polygonal cross-section formed by cutting a section perpendicular to the axis of the flexible unit 1. Compared to related technologies where the cross-section is circular, the polygonal corners in this embodiment present stress concentration points. Furthermore, the bending resistance of a polygon is lower than that of a circle. This results in a lower external force required to deform the flexible unit 1 compared to related technologies, thus improving the ease of deformation of the shaping wire.

[0057] Furthermore, in this embodiment, the ablation catheter and the shaping wire are used in conjunction. The bending degree of the ablation catheter is adjusted by external force to change the bending degree of the flexible unit 1, so that the ablation catheter can conform to the shape of the mitral and tricuspid valves. Of course, in other embodiments, the fitting structure of the shaping wire may be adjusted according to the different usage scenarios of the shaping wire, which is not limited here. The ablation catheter has a receiving channel, and the shaping wire passes through the receiving channel and is slidably connected to the receiving channel, thereby facilitating the replacement of the shaping wire and the ablation catheter.

[0058] In addition, combined Figure 1 As shown, in this embodiment, the cross-section of the flexible unit 1 can be quadrilateral. Of course, in other embodiments, the cross-section of the flexible unit 1 can be triangular. Compared with other embodiments, the quadrilateral cross-section of the flexible unit 1 in this embodiment can increase the number of corners, thereby increasing the stress concentration points of the flexible unit 1, and thus achieving the technical effect of improving the ease of deformation of the shaping wire.

[0059] In other embodiments, the cross-section of the flexible unit 1 can be a polygon with more sides. Compared to other embodiments, by limiting the cross-section of the flexible unit 1 to a quadrilateral, this embodiment achieves the technical effect of improving the ease of processing the flexible unit 1.

[0060] Furthermore, in this embodiment, the lengths of adjacent sides in the cross-section of the flexible unit 1 are not equal. Of course, in other embodiments, the lengths of adjacent sides can be equal. Compared to other embodiments, by limiting the lengths of adjacent sides to be unequal, this embodiment can reduce the restrictions on the cross-sectional shape of the flexible unit 1, thereby achieving the technical effect of improving the ease of processing the flexible unit 1.

[0061] In addition, combined Figure 1 and Figure 2 As shown, in this embodiment, the shaping wire includes a support unit 2, which is connected to the other end of the flexible unit 1 and is used to support the flexible unit 1. Therefore, when the bending degree of the shaping wire is adjusted, the support unit 2 can improve the stability of the flexible unit 1 during the bending degree adjustment process, ensuring that the flexible unit 1 only moves in a contracting or expanding motion around the support unit 2, preventing the flexible unit 1 from deflecting in other directions during the adjustment process, thereby achieving the technical effect of improving the stability of the bending degree adjustment of the flexible unit 1. Alternatively, in a different implementation, the shaping wire may not include the support unit 2.

[0062] In this embodiment, the support unit 2 and the flexible unit 1 are integrally formed. This improves the stability of the connection between the support unit 2 and the flexible unit 1. Alternatively, the support unit 2 and the flexible unit 1 can be separate components, specifically welded together or connected using other fixing methods.

[0063] Furthermore, by taking a cross-section along a direction perpendicular to the axis of the flexible unit 1, the cross-sectional dimensions of the support unit 2 are larger than those of the flexible unit 1. Based on this, the shear resistance of the support unit 2 can be improved, thereby achieving the technical effect of improving the reliability of the support unit 2 in supporting the flexible unit 1.

[0064] In particular, at the connection between the flexible unit 1 and the support unit 2, the connection cross section gradually changes in order to improve the smoothness of the connection between the flexible unit 1 and the support unit 2.

[0065] Furthermore, the support unit 2 is circular in cross-section along the axis perpendicular to the flexible unit 1. This improves the smoothness of the shaping wire as it passes through the receiving channel, thereby enhancing the ease of sliding connection between the shaping wire and the ablation catheter.

[0066] Of course, in other embodiments, the cross-sectional shape of the support unit 2 can be adjusted according to the different designs of the shaping wire.

[0067] In addition, combined Figure 1 As shown, the support unit 2 includes a curved portion 201 and a straight portion 202. One end of the curved portion 201 is connected to the proximal end 101 of the flexible unit, and the other end of the curved portion 201 is connected to the straight portion 202, for supporting the flexible unit 1. Based on this, during the adjustment of the bending degree of the flexible unit 1, the curved portion 201 can better support the flexible unit 1. When the flexible unit 1 tends to deflect in other directions during the adjustment process, the shear resistance of the curved portion 201 can resist the deflection force, thereby achieving the technical effect of improving the stability of the bending degree adjustment of the flexible unit 1. By providing the straight portion 202, the shape of the shaping wire can be adapted to the shape of the ablation catheter.

[0068] In this embodiment, the proximal end is the end of the shaping yarn that is closer to the medical staff during use, while the distal end refers to the end that is farther away from the medical staff.

[0069] Furthermore, the flexible unit 1 and the bending portion 201 are spiral-shaped. Based on this, by defining the flexible unit 1 as a spiral shape, when an external force drives the flexible unit 1 away from one end of the bending portion 201, the degree of bending of the shaping filament can be adjusted, thereby improving the ease of adjusting the degree of bending of the shaping filament. Simultaneously, by defining the bending portion 201 as a spiral shape, the smoothness of the connection between the flexible unit 1 and the bending portion 201 can be improved, thereby increasing the supporting force of the bending portion 201 on the flexible unit 1.

[0070] Furthermore, the helical shafts of the flexible unit 1 and the curved portion 201 are located on the same straight line as the straight portion 202, i.e., they are coaxially arranged. Of course, in other embodiments, the helical shafts of the flexible unit 1 and the curved portion 201 may not be located on the same straight line as the straight portion 202, i.e., they may be off-axis arranged.

[0071] Compared to the off-axis configuration of other embodiments, this embodiment sets the helical axis of the flexible unit 1 and the curved portion 201 coaxial with the straight portion 202. That is, the helix formed by the curved portion 201 has a variable diameter. When adjusting the curvature of the flexible unit 1, in other embodiments, due to the off-center configuration of the flexible unit 1 and the straight portion 202, a portion of the flexible unit 1 may be too far from the straight portion 202, while another portion may be too close. In this case, even a slight deviation in the placement of the straight portion 202 can cause the flexible unit 1 to exert pressure on the mitral and tricuspid valves, potentially causing damage. Simultaneously, it prevents another portion of the ablation catheter from adhering to the blood vessel, hindering ablation and the detection of electrophysiological signals.

[0072] In this embodiment, the flexible unit 1, the curved portion 201, and the straight portion 202 are coaxially arranged. When the degree of curvature of the flexible unit 1 is adjusted, the straight portion 202 can be placed at the axis of the blood vessel, so that the flexible unit 1 is coaxially arranged with the blood vessel, ensuring the comprehensive fit of the ablation catheter with the blood vessel. Furthermore, the flexible unit 1 can be adjusted around the straight portion 202 to either shrink or expand, so that the adjustment of the flexible unit 1 will not damage the mitral and tricuspid valves, and can also ensure the comprehensiveness of the ablation catheter in ablation of blood vessels and detection of electrophysiological signals.

[0073] Furthermore, in this embodiment, the maximum radius of the helix formed by the bending portion 201 is greater than the maximum radius of the helix formed by the flexible unit 1. Based on this, the bending portion 201 can better support the flexible unit 1, thereby achieving the technical effect of improving the reliability of the support unit 2. Alternatively, the maximum radius of the helix formed by the bending portion 201 can be equal to the maximum radius of the helix formed by the flexible unit 1.

[0074] Of course, in other embodiments, depending on the design of the shaping yarn, it is possible to limit only that the maximum radius of the spiral formed by the bending portion 201 is not less than the maximum radius of the spiral formed by the flexible unit 1, or to limit only that the spiral axes of the flexible unit 1 and the bending portion 201 are located on the same straight line as the straight portion 202.

[0075] Furthermore, in this embodiment, the surface of the flexible unit 1 is provided with a first lubrication structure, and the surface of the support unit 2 is provided with a second lubrication structure. The first and second lubrication structures reduce the friction between the shaping wire and the receiving channel, thereby improving the ease of inserting the shaping wire into the ablation catheter.

[0076] In this embodiment, the first and second lubrication structures can be polytetrafluoroethylene (PTFE) coatings. Of course, in other embodiments, the types of the first and second lubrication structures can be adjusted according to the design of the shaping yarn; for example, the first and second lubrication structures can be polydimethylsiloxane layers. Alternatively, the lubrication materials of the first and second lubrication structures can be different.

[0077] In this embodiment, both the support unit 2 and the flexible unit 1 are nickel-titanium archwires. The nickel-titanium alloy of the flexible unit 1 has shape memory properties, facilitating the restoration of the shaping wire to its original shape, i.e., a spiral shape. The use of nickel-titanium archwire for the support unit 2 allows for the integral molding of the support unit 2 and the flexible unit 1. Alternatively, both the support unit 2 and the flexible unit 1 can be ordinary metal alloys or plastics. Of course, in other embodiments, only the flexible unit 1 can be a nickel-titanium archwire, while the support unit 2 can be an ordinary alloy; all of these are within the scope of this application.

[0078] In other embodiments, depending on the design of the shaping wire, the cross-section may be limited to the direction perpendicular to the axis of the flexible unit 1, and the cross-sectional size of the support unit 2 may be larger than that of the flexible unit 1; or the cross-section may be limited to the direction perpendicular to the axis of the flexible unit 1, and the support unit 2 may be circular; or the support unit 2 may be limited to being welded to or integrally formed with the flexible unit 1; or the surface of the support unit 2 may be provided with a second lubrication structure; or any combination of any two, three, or four structures may be limited.

[0079] In other embodiments, depending on the design of the shaping wire, the first lubrication structure may be provided only on the surface of the flexible unit 1, or the nickel-titanium bow wire may be provided only.

[0080] According to an embodiment of the present invention, another aspect provides an ablation catheter, comprising:

[0081] Ablation unit 3 includes an ablation structure, which is a flexible structure and has a receiving channel on it;

[0082] In this embodiment, the shaping wire is placed in a receiving channel of matching size and is used to adjust the bending degree of the ablation unit 3;

[0083] Multiple annular electrodes 4 are provided and spaced apart on the ablation unit 3. When the annular electrodes 4 are energized, they can release pulses to detect the electrocardiographic activity at the pulmonary vein orifice.

[0084] In this embodiment, the proximal end of the ablation unit 3 and the proximal end of the shaping wire can be detachably connected via a clamp, which can improve the positional stability between the ablation unit 3 and the shaping wire. The distal end of the shaping wire is located within the receiving channel. Of course, in other embodiments, the proximal end of the ablation unit 3 and the proximal end of the shaping wire can be detachably connected via threads, or the position of the detachable connection between the ablation unit 3 and the shaping wire can be adjusted as needed.

[0085] In this embodiment, the ablation structure can be made of medical polymer materials, such as thermoplastic polyurethane elastomer, and the annular electrode 4 can be made of gold. Of course, in other embodiments, the type of medical polymer material used in the ablation structure can be adjusted according to the design of the ablation catheter. Simultaneously, the material of the annular electrode 4 can be adjusted; for example, the annular electrode 4 can be made of a platinum-iridium alloy.

[0086] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A stylet for adjusting the degree of curvature of an ablation catheter, characterized in that, The shaping yarn includes: A flexible unit (1) is provided, one end of which is used to connect to the ablation catheter. The flexible unit (1) is used to adjust the degree of bending under external force. A cross section is made along the direction perpendicular to the axis of the flexible unit (1), and the flexible unit (1) is polygonal.

2. The shaped wire of claim 1, wherein, The cross-section of the flexible unit (1) is quadrilateral.

3. The shaped wire of claim 2, wherein, In the cross section of the flexible unit (1), the lengths of adjacent sides are not equal.

4. The shaped wire of any one of claims 1-3, wherein, The shaping yarn includes a support unit (2), which is connected to the other end of the flexible unit (1) and is used to support the flexible unit (1).

5. The shaped wire of claim 4, wherein, The support unit (2) includes a curved portion (201) and a straight portion (202). One end of the curved portion (201) is connected to the proximal end (101) of the flexible unit, and the other end of the curved portion (201) is connected to the straight portion (202) to support the flexible unit (1).

6. The shaped wire of claim 5, wherein, The flexible unit (1) and the curved portion (201) are spiral-shaped.

7. The shaped wire of claim 6, wherein, The maximum radius of the spiral formed by the curved portion (201) is not less than the maximum radius of the spiral formed by the flexible unit (1); And / or, the helical shafts of the flexible unit (1) and the curved portion (201) are both located on the same straight line as the straight portion (202).

8. The shaped wire of claim 4, wherein, A cross-section is made along the direction perpendicular to the axis of the flexible unit (1), and the cross-sectional dimension of the support unit (2) is larger than that of the flexible unit (1); And / or, the support unit (2) is circular, with a cross section made along the direction perpendicular to the axis of the flexible unit (1); And / or, the support unit (2) is welded to or integrally formed with the flexible unit (1); And / or, the surface of the support unit (2) is provided with a second lubrication structure; And / or, the support unit (2) is a nickel-titanium bow wire.

9. The shaping yarn according to any one of claims 1-3, characterized in that, The surface of the flexible unit (1) is provided with a first lubrication structure; And / or, the flexible unit (1) is a nickel-titanium bowwire.

10. An ablation catheter characterized by, include: The ablation unit (3) includes an ablation structure, which is a flexible structure and has a receiving channel. The shaping wire according to any one of claims 1-9, wherein the shaping wire is disposed in the receiving channel for adjusting the bending degree of the ablation unit (3).

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