Shaping tool and shaping method for medical catheters

Abstract

The application provides a medical catheter shaping tool and shaping method. The medical catheter shaping tool is used for accurately positioning each sub-bending section in a to-be-shaped bending section of a medical catheter by using a first bending groove in a positioning mold and a plurality of clamps. Each sub-bending section in the to-be-shaped bending section can be simultaneously bent by a second bending groove in a bending mold, and the stability of the bending process can be improved under the fixed clamping of the clamps. In addition, the bending mold further comprises a twisting member, which can twist the proximal end of the to-be-shaped bending section without affecting the bending effect. Since the bending shape of the second bending groove is preset, the position of a pull wire cavity in the medical catheter after twisting can be determined according to the preset bending shape, so that the pull wire cavity is always located on the inside of the bending by twisting to a preset angle, thereby facilitating the acquisition of a stable three-dimensional bending shape.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a shaping tool and method for medical catheters. Background Technology

[0002] Electrophysiological catheters are tools used to measure and record electrical signals within a living organism, and they have been widely applied in medicine, biology, and neuroscience. Mapping catheters, a type of electrophysiological catheter, are primarily used to record electrophysiological signals from various parts of the heart to evaluate arrhythmias. To accommodate different locations within the heart, adjustable-bend mapping catheters are generally used in electrophysiological procedures. The curvature of the adjustable-bend mapping catheter tip can be adjusted to allow placement at locations such as the coronary sinus, high right atrium, His bundle, or right ventricular apex, enabling electrophysiological examination and mapping of various parts of the heart.

[0003] The coronary sinus has a narrow passage and a unique internal shape. Typical adjustable-bend mapping catheters have a planar bend, making it difficult to access the coronary sinus venous ostium. Furthermore, the catheter electrode easily slips out of the ostium, making it impossible to acquire stable electrophysiological signals. Therefore, a specially designed three-dimensional adjustable-bend catheter is required for the coronary sinus. Current processes use molds to pre-shape the adjustable-bend catheter to obtain this special three-dimensional bend. However, existing molds are not only complex in structure and cumbersome to operate, but also have low forming efficiency and unstable forming results.

[0004] Therefore, a new three-dimensional bending mold is urgently needed to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a shaping tool and method for medical catheters, so as to solve the problem of how to improve the shaping effect and efficiency of medical catheters.

[0006] To solve the above technical problems, the present invention provides a shaping tooling for a medical catheter, wherein the medical catheter has a section to be shaped and bent, and the sub-bending section includes several sub-bending sections. The shaping tooling for the medical catheter includes: a positioning mold and a bending mold.

[0007] The positioning mold includes a positioning element and multiple clamps; the positioning element has a first curved groove for accommodating the segment to be shaped and bent; the multiple clamps are at least disposed within the positioning element to clamp and position each of the sub-bending segments respectively;

[0008] The bending die includes a bending member and a torsion member; the bending member has a second curved groove for accommodating the distal end of the bending segment to be shaped and defining the distal end as a preset curved shape; the torsion member is disposed on one side of the bending member and has a guide groove for accommodating the proximal end of the bending segment to be shaped; and the torsion member is rotatable relative to the bending member to twist the proximal end to a preset angle.

[0009] Optionally, in the shaping fixture for the medical catheter, the top surface of the bending member is curved, and the second bending groove extends along the curved surface so that the distal end, which is accommodated in the second bending groove, has the preset bending shape.

[0010] Optionally, in the shaping fixture for the medical catheter, the bending member further has at least two clamping slots to accommodate the clamps; the at least two clamping slots intersect with the second bending slot and are spaced apart on the extension trajectory of the second bending slot; wherein the groove direction of each clamping slot is perpendicular to the tangent of the extension trajectory of the adjacent second bending slot.

[0011] Optionally, in the shaping fixture for the medical catheter, the opposing surfaces of the fixed bending member and the torsion member are respectively provided with arc-shaped grooves and connecting ends adapted to the arc-shaped grooves, so that the fixed bending member and the torsion member can be rotatably connected.

[0012] Optionally, in the shaping fixture for the medical catheter, the torsion member further has a plurality of positioning grooves, which are distributed circumferentially around the torsion member and extend in a direction perpendicular to the opposite face of the torsion member and the fixed bending member; wherein, relative to the rotation axis of the torsion member, the included angle between adjacent positioning grooves is equal.

[0013] Optionally, in the shaping fixture for the medical catheter, the bending die further includes a pin, and the surface of the bending member relative to the torsion member is provided with a blind hole; the pin can be inserted into the positioning groove and extend into the blind hole to limit the rotation angle of the torsion member relative to the bending member.

[0014] Optionally, in the shaping fixture for the medical catheter, the catheter groove is disposed on the top surface of the torsion member and extends in a direction perpendicular to the opposite face of the torsion member and the fixed bend member; and the torsion member also has a clamping groove to accommodate the clamp; the clamping groove intersects with the catheter groove, and the groove direction of the clamping groove is perpendicular to the extending direction of the catheter groove.

[0015] Optionally, in the shaping fixture for the medical catheter, the positioning member further has multiple clamping slots to accommodate the clamps; wherein the multiple clamping slots and the first curved slot are both disposed on the top surface of the positioning member, and the multiple clamping slots are spaced apart on the extension trajectory of the first curved slot; and, the slot direction of some of the clamping slots is perpendicular to the top surface of the positioning member, and the slot direction of some of the clamping slots forms an acute angle with the top surface of the positioning member.

[0016] Optionally, in the shaping fixture for the medical catheter, the clamping grooves in the positioning member correspond one-to-one with the clamping grooves in the bending die, and the positions of each clamping groove in the positioning member relative to the medical catheter are the same as the positions of each clamping groove in the bending die relative to the medical catheter; and,

[0017] The fixture slot is provided with a slide rail, and the fixture is provided with a slide groove that matches the slide rail, so that the fixture can be detachably connected to the fixture slot.

[0018] Optionally, in the shaping fixture for the medical catheter, the top surfaces of the bending member and the torsion member are respectively provided with a first cover plate groove and a second cover plate groove; wherein, the first cover plate groove and the second cover plate groove are close to the intersection of the bending member and the torsion member, and the first cover plate groove is provided near a portion of the second bending groove, and the second cover plate groove is provided near a portion of the catheter groove.

[0019] The fixed bending mold further includes a first cover plate and a second cover plate; the first cover plate and the second cover plate can be respectively inserted into the first cover plate groove and the second cover plate groove to cover part of the second bending groove and part of the guide groove respectively;

[0020] In addition, the side wall of the fixed bending member is provided with several heat conduction grooves.

[0021] Optionally, in the shaping fixture for the medical catheter, the clamp includes an upper clamp, a lower clamp, a connecting shaft, and a locking member; one end of the upper clamp and the lower clamp are respectively connected to the connecting shaft so that the upper clamp and the lower clamp can rotate relative to each other and clamp the medical catheter; the other end of the upper clamp and the lower clamp can be respectively connected to the locking member so that the relative position of the upper clamp and the lower clamp is fixed by the locking member.

[0022] Based on the same inventive concept, the present invention also provides a method for shaping a medical catheter, comprising:

[0023] The medical catheter to be shaped and bent is housed in the first bent groove of the positioning member, and the various sub-bents of the to be shaped and bent are clamped and positioned by multiple clamps.

[0024] The section to be shaped and the plurality of fixtures are placed together in the bending mold; wherein, the distal end of the section to be shaped is accommodated in the second bending groove of the bending member, and the proximal end of the section to be shaped is accommodated in the guide groove of the torsion member.

[0025] The bending die is heated to give the distal end a preset bending shape;

[0026] The torsion member is rotated relative to the fixed bending member to twist the proximal end to a preset angle;

[0027] The bending die is heated so that the proximal end has a preset torsion angle.

[0028] Optionally, in the method for shaping the medical catheter, during the process of placing the section to be shaped and the plurality of clamps together in the bending mold, the plurality of clamps maintain the clamping of each of the sub-bending segments of the section to be shaped.

[0029] In summary, this invention provides a shaping fixture and method for medical catheters. The shaping fixture utilizes a first curved groove in a positioning mold and multiple clamps to precisely position each sub-bending segment of the medical catheter to be shaped. Furthermore, the second curved groove in the bending mold allows for simultaneous bending of each sub-bending segment of the to-be-shaped section, and the clamping of the clamps improves the stability of the bending process. In addition, the bending mold includes a torsion member that can torsion the proximal end of the to-be-shaped section without affecting the bending effect. Since the bending shape of the second curved groove is preset, the position of the drawstring cavity within the medical catheter after torsion can be determined based on the preset bending shape. By torsion to a preset angle, the drawstring cavity can be ensured to always be located inside the bend, facilitating the acquisition of a stable three-dimensional bending shape.

[0030] Therefore, the shaping fixture and method for medical catheters provided by this invention can simultaneously achieve both bending and twisting processes, simplifying the process, increasing shaping efficiency, and providing good shaping effect and easy operation. Attached Figure Description

[0031] Those skilled in the art will understand that the accompanying drawings are provided to better understand the invention and do not constitute any limitation on the scope of the invention.

[0032] Figure 1 This is a schematic diagram of the three-dimensional curved shape of the medical catheter in an embodiment of the present invention.

[0033] Figure 2 This is a schematic diagram of the initial curvature of the medical catheter in an embodiment of the present invention.

[0034] Figure 3 This is a schematic diagram showing the position of the pull-wire cavity after twisting in the medical catheter in an embodiment of the present invention.

[0035] Figure 4 This is a schematic diagram of the positioning mold in an embodiment of the present invention.

[0036] Figure 5 This is a schematic diagram of the structure of the fixed bending mold in an embodiment of the present invention.

[0037] Figure 6 This is a schematic diagram of the positioning component in an embodiment of the present invention.

[0038] Figure 7 This is a schematic diagram of the structure of the first clamping groove in the positioning component in an embodiment of the present invention.

[0039] Figure 8 This is an embodiment of the present invention. Figure 7 Cross-sectional view at point D-D'.

[0040] Figure 9 This is a schematic diagram of the fixture in an embodiment of the present invention.

[0041] Figure 10 This is a schematic diagram showing the position of the silicone pad in an embodiment of the present invention.

[0042] Figure 11 This is a schematic diagram of the structure of the fixed bending member in an embodiment of the present invention.

[0043] Figure 12 This is a partial structural cross-sectional view of the fourth clamping groove in an embodiment of the present invention.

[0044] Figure 13 This is a cross-sectional view of the fifth clamping groove in an embodiment of the present invention.

[0045] Figure 14 This is a schematic diagram of the torsion member in an embodiment of the present invention.

[0046] Figure 15 This is a schematic diagram of the pin structure in an embodiment of the present invention.

[0047] Figure 16 This is a schematic diagram of the structure of the first cover plate in an embodiment of the present invention.

[0048] Figure 17 This is a schematic diagram of the structure of the second cover plate in an embodiment of the present invention.

[0049] Figure 18 This is a flowchart of the shaping method for a medical catheter in an embodiment of the present invention.

[0050] Figure 19 This is a schematic diagram illustrating the positioning of a medical catheter in an embodiment of the present invention.

[0051] Figure 20 This is a schematic diagram of placing the clamp and medical catheter together in the fixed bending mold in an embodiment of the present invention.

[0052] Figure 21 This is a schematic diagram of the clamp and medical catheter located inside the fixed-bend mold in an embodiment of the present invention.

[0053] Figure 22 This is a schematic diagram of twisting a medical catheter in an embodiment of the present invention.

[0054] And, in the attached image:

[0055] 10-Medical catheter; 101-Tip; 1011-First bend; 1012-Second bend; 102-Body; 103-Pull-wire cavity;

[0056] 20-Positioning mold; 201-Positioning component; 202-Clamp; 2021-Upper clamping plate; 2022-Lower clamping plate; 2023-Connecting shaft; 2024-Locking component;

[0057] 30-Fixed bending die; 301-Fixed bending part; 302-Torsion part; 3021-Connecting end; 303-Pin; 304-First cover plate; 305-Second cover plate;

[0058] P1 - First plane; P2 - Second plane;

[0059] V1 - First direction; V2 - Second direction; V3 - Third direction;

[0060] C1 - First curved groove; C2 - Second curved groove; C3 - Guide groove; C4 - Arc groove; C5 - Positioning groove; C6 - Blind hole; C7 - First cover plate groove; C8 - Second cover plate groove; C9 - Heat conduction groove;

[0061] T1 - First clamping slot; T2 - Second clamping slot; T3 - Third clamping slot; T4 - Fourth clamping slot; T5 - Fifth clamping slot; T6 - Sixth clamping slot;

[0062] L0 - Slot orientation of the first fixture slot; L1 - Slot orientation of the fourth fixture slot; L2 - Tangent line of the trajectory of the second curved slot connected to the fourth fixture slot; L3 - Slot orientation of the fifth fixture slot; L4 - Tangent line of the trajectory of the second curved slot connected to the fifth fixture slot;

[0063] M0 - Top surface of the positioning component; M1 - Top surface of the bending component; M2 - Side surface of the bending component; M3 - Top surface of the torsion component; M4 - Side wall of the torsion component;

[0064] S0 - Slide rail; S1 - Slide groove; H - Hole; W - Silicone pad. Detailed Implementation

[0065] 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 and specific embodiments. It should be noted that the drawings are all in a very simplified form and are not drawn to scale, only used to facilitate and clearly illustrate the objectives of the embodiments of the present invention. Furthermore, the structures shown in the drawings are often part of the actual structure. In particular, different figures may have different focuses and sometimes use different scales. It should also be understood that, unless specifically stated or indicated, the terms "first," "second," "third," etc., in the specification are only used to distinguish the various components, elements, steps, etc., in the specification, and not to indicate the logical or sequential relationships between the various components, elements, steps, etc. Also, in the present invention, "distal" usually refers to the end of the medical device that first enters the patient's body during normal operation, while "proximal" usually refers to the end of the medical device that is closest to the operator during normal operation. The X-axis, Y-axis, and Z-axis directions referred to in the present invention are three mutually perpendicular directions in three-dimensional space.

[0066] As described above, due to the unique morphology of the coronary sinus, an adjustable mapping catheter with a special three-dimensional curvature is required to acquire electrophysiological signals. Please refer to [link to relevant documentation]. Figure 1 The adjustable bending mapping catheter with a special three-dimensional bend has its tip 101 and body 102 located on a first plane P1 and a second plane P2, respectively, which are not coplanar. The tip 101 bends along a first direction V1 within the first plane P1, and the junction of the tip 101 and the body 102 bends along a second direction V2 within the second plane P2. The first direction V1 and the second direction V2 are opposite. Therefore, the adjustable bending mapping catheter needs to be pre-shaped to form an initial bend in the section to be bent. Then, a drawstring inside the catheter is used to adjust the curvature of the initial bend, ultimately achieving the desired result. Figure 1 The three-dimensional curved shape shown.

[0067] Specifically, such as Figure 2 and Figure 3 As shown, the curved section with an initial bend can be divided into two parts: a first curved section 1011 and a second curved section 1012. Under the action of the tension wire, the first curved section 1011 and the second curved section 1012 should be able to respectively move towards... Figure 1The first direction V1 and the second direction V2 are bent. Therefore, after forming the initial bend, the conduit needs to be twisted at a certain angle along the third direction V3 so that the draw-wire cavity 103 inside the conduit can be biased towards the inside of each bend segment. That is, as shown in sections A-A' and B-B', the draw-wire cavity 103 is located inside the bends of the first bend segment 1011 and the second bend segment 1012. However, since the draw-wire cavity 103 is located inside the conduit, and it is impossible to visually determine whether the draw-wire cavity 103 is accurately located inside the bend segment with the initial bend during the twisting process, it is easy to cause instability in the pre-forming effect, and subsequent wire drawing will not be able to obtain a stable three-dimensional bend. Furthermore, existing pre-forming molds also have drawbacks such as complex structure, cumbersome operation, and low forming efficiency.

[0068] Therefore, this embodiment provides a shaping fixture for medical catheters, used to shape the bend section of a medical catheter to be shaped. Please refer to [link / reference]. Figure 4 and Figure 5 The shaping fixture for the medical catheter includes a positioning mold 20 and a bending mold 30. The positioning mold 20 includes a positioning element 201 and a plurality of clamps 202. The positioning element 201 has a first curved groove C1 for accommodating the bending segment to be shaped of the medical catheter 10. The plurality of clamps 202 are at least disposed within the positioning element 201 to clamp and position each sub-bending segment of the bending segment to be shaped. The bending mold 30 includes a bending element 301 and a torsion element 302. The bending element 301 has a second curved groove C2 for accommodating the distal end of the bending segment to be shaped and defining the distal end as a preset bending shape. The torsion element 302 is disposed on one side of the bending element 301 and has a catheter groove C3 for accommodating the proximal end of the bending segment to be shaped. The torsion element 302 is rotatable relative to the bending element 301 to torsion the proximal end to a preset angle.

[0069] It is understood that the shaping fixture for the medical catheter provided in this embodiment utilizes the first curved groove C1 and multiple clamps 202 to accurately position each sub-bending segment in the shaping section of the medical catheter 10; and utilizes the second curved groove C2 to simultaneously bend each sub-bending segment in the shaping section; and under the fixed clamping of the clamps 202, the stability of the bending process can be improved. Furthermore, the torsion member 302 can torsion the proximal end of the shaping section to a preset angle without affecting the bending effect. Moreover, since the bending shape of the second curved groove C2 is preset, on the one hand, it can ensure that the drawer cavity in each sub-bending segment is located inside the bend during the bending process; on the other hand, it can accurately calculate the preset angle of the torsion member 302 to ensure that the drawer cavity is located inside the bend after torsion, thereby obtaining a stable three-dimensional bending shape. Therefore, the shaping fixture for the medical catheter provided in this embodiment can not only simultaneously realize the two processes of bending and twisting, simplifying the process and improving the shaping efficiency, but also has a good shaping effect and strong shaping stability.

[0070] The following is in conjunction with the appendix Figures 1 to 22 This embodiment provides a detailed description of the shaping fixture for the medical catheter.

[0071] Please continue reading. Figure 4 and Figure 5 The shaping fixture for the medical catheter provided in this embodiment includes a positioning mold 20 and a bending mold 30. The positioning mold 20 is used to determine each sub-bending segment in the bending section to be shaped of the medical catheter 10, and to position the beginning and end of each sub-bending segment, thereby facilitating subsequent bending or twisting of each sub-bending segment. The bending mold 30 is used to constrain and / or twist each sub-bending segment in the bending section to be shaped, so as to construct each sub-bending segment into a preset bending shape. It should be noted that this embodiment does not limit the specific type of the medical catheter 10, for example, it can be an adjustable bending mapping catheter or other catheters. Specifically, when the medical catheter 10 is an adjustable bending mapping catheter, the bending section to be shaped is the adjustable bending segment at the distal end of the adjustable bending mapping catheter.

[0072] For details, please refer to Figure 4 and Figure 6The positioning mold 20 includes a positioning element 201 and multiple clamps 202. The positioning element 201 is a rigid, one-piece structure to accommodate and constrain the section to be shaped and bent. The top surface M0 of the positioning element 201 has a first curved groove C1 and multiple clamping grooves. The first curved groove C1 accommodates the section to be shaped and bent of the medical catheter 10; the clamping grooves accommodate the clamps 202 to position each sub-bending segment within the section to be shaped and bent. To facilitate defining the beginning and end positions of each sub-bending segment, preferably, the top surface M0 and bottom surface of the positioning element 201 are parallel to each other, and the first curved groove C1 lies flat on the top surface M0 of the positioning element 201, so that the section to be shaped and bent of the medical catheter 10 lies flat on the top surface M0 of the positioning element 201. In other words, the plane containing the first curved groove C1 is parallel to the top surface M0 of the positioning member 201, which facilitates the visual determination of the beginning and end of each curved segment in the section to be shaped and bent. In this embodiment, the extension trajectory of the first curved groove C1 on the top surface M0 of the positioning member 201 is not limited; it can be straight or curved. For ease of subsequent bending of the section to be shaped and bent, preferably, the extension trajectory of the first curved groove C1 is similar to the 90-degree distal bend of the medical catheter 10. That is, as... Figure 6 As shown, the first curved groove C1 extends across the top surface M0 of the positioning member 201 and is in the shape of a "J". Furthermore, the internal shape of the first curved groove C1 is adapted to the external circumferential shape of the section to be shaped and bent in the medical catheter 10, so as to ensure that the section to be shaped and bent is stably accommodated within the first curved groove C1.

[0073] Furthermore, multiple clamping slots are spaced apart on the extension trajectory of the first curved groove C1 and intersect with the first curved groove C1. Since the clamping slots are used to accommodate the clamps 202, and the clamps 202 are used to clamp and fix the beginning and end ends of each sub-bent segment, the position and number of the clamping slots depend on the position and number of each sub-bent segment. Similarly, the position and number of the clamps 202 also depend on the position and number of each sub-bent segment. For example, the medical catheter 10 needs to form... Figure 2For the initial bend shown, if the number of sub-bends is 2, then the number of clamps 202 and clamp slots is 3, located at the beginning and end of the first and second sub-bends, respectively. If the number of sub-bends is 3, then the number of clamps 202 and clamp slots is 4, located at the beginning and end of the first, second, and third sub-bends, respectively. And so on, with a total number of n sub-bends (n is a positive integer), and a total number of (n+1) clamps 202 and clamp slots. Furthermore, along the extension trajectory of the first bend groove C1, the spacing between adjacent clamp slots can be determined according to the specific length of each preset sub-bend; this embodiment does not specifically limit this.

[0074] It should be noted that the depth of the clamp groove is greater than that of the first curved groove C1, so that after the clamp 202 is accommodated in the clamp groove, the center of the hole H in the clamp 202 for the medical tube 10 is located on the central axis of the first curved groove C1, ensuring that the clamp 202 can stably clamp the medical catheter 10 without affecting the preset curved shape of the medical catheter 10. Furthermore, to facilitate subsequent bending of different sub-bending segments, the curvature of each sub-bending segment can be pre-adjusted during the positioning stage. In this case, the groove direction of some clamp grooves is perpendicular to the top surface of the positioning member 201, and the groove direction of some clamp grooves forms an acute angle with the top surface of the positioning member 201. It should be noted that the groove direction referred to in this embodiment is the direction in which the opening of the groove faces the bottom of the groove.

[0075] For ease of explanation, this embodiment uses the example of setting three clamping slots. For example... Figure 6 As shown, the positioning member 201 is respectively provided with a first clamping groove T1, a second clamping groove T2, and a third clamping groove T3. Therefore, the shaping and bending section of the medical catheter 10 includes two sub-bending sections, wherein the first sub-bending section is located between the first clamping groove T1 and the second clamping groove T2, and the second sub-bending section is located between the second clamping groove T2 and the third clamping groove T3. Further details can be found in the following documents. Figure 7 and Figure 8To facilitate subsequent bending of the first and second sub-bending segments, the second clamping groove T2 and the third clamping groove T3 are perpendicular to the top surface M0 of the positioning member 201. The groove direction L0 of the first clamping groove T1 forms an acute angle β with the top surface M0 of the positioning member 201; that is, the angle β is between 0 degrees and 90 degrees. For example, if the angle β is 45 degrees, the medical catheter 10 located in the first clamping groove T1 has a curved tendency to bend upwards, which facilitates subsequent bending processing. Of course, in other embodiments, the second clamping groove T2 or the third clamping groove T3 may also form an acute angle β with the top surface of the positioning member 201 to meet the bending tendency of different sub-bending segments.

[0076] Please see Figure 4 , Figure 6 , Figure 9 and Figure 10 In this embodiment, the clamp 202 is detachably connected to the clamp groove. This is to ensure that the clamp 202 maintains a firm grip on the medical catheter 10 throughout the positioning and bending process, guaranteeing the stability of the shaping and improving the shaping effect. Preferably, a slide rail S0 is provided in the clamp groove, and a sliding groove S1 is provided in the clamp 202. The slide rail S0 and the sliding groove S1 are compatible and can form a sliding relationship to achieve the connection and separation of the clamp 202 and the clamp groove. In other embodiments, the slide rail S0 can be disposed on the clamp 202, and the sliding groove S1 can be disposed within the clamp groove, so that the slide rail S0 and the sliding groove S1 form a relative sliding relationship. Further, the clamp 202 includes an upper clamping plate 2021, a lower clamping plate 2022, a connecting shaft 2023, and a locking member 2024. One end of the upper clamping plate 2021 and the lower clamping plate 2022 are respectively connected to the connecting shaft 2023, so that the upper clamping plate 2021 and the lower clamping plate 2022 can rotate relative to each other and clamp the medical catheter 10. The other end of the upper clamping plate 2021 and the lower clamping plate 2022 can be connected to the locking member 2024, so as to fix the relative position of the upper clamping plate 2021 and the lower clamping plate 2022 via the locking member 2024. Optionally, the locking member 2024 is an internal hexagonal flat head screw. The sliding groove S1 is provided on the side wall of the connecting shaft 2023. Preferably, at least two sliding grooves S1 are provided on the side wall of the connecting shaft 2023 to ensure a stable connection between the clamp 202 and the clamping groove.

[0077] Furthermore, silicone pads W are respectively provided on the opposite surfaces of the upper clamping plate 2021 and the lower clamping plate 2022, and a hole H is formed in the central area of ​​the two silicone pads W when they are in closed contact to accommodate the medical catheter 10. Preferably, the silicone pads W are glued to the opposite surfaces of the upper clamping plate 2021 and the lower clamping plate 2022. It is understood that the silicone pads W have a low degree of deformation, so that during the clamping process of the medical catheter 10, the upper clamping plate 2021 and the lower clamping plate 2022 apply a large compressive force to the silicone pads W without causing the medical catheter 10 to deform. In addition, the silicone pads W are made of an inert polymer, so they will not react with the medical catheter 10 during the subsequent heat setting process, thus not affecting the quality of the medical catheter 10. Furthermore, the silicone pad W becomes softer and more adhesive after heating, allowing it to fit more tightly to the outer periphery of the medical catheter 10. It also prevents the medical catheter 10 from rotating during subsequent bending and twisting processes, greatly improving the stability of the shaping process and thus achieving a better three-dimensional curved shape.

[0078] Please see Figure 5 and Figure 11 The bending die 30 includes a bending member 301 and a torsion member 302. The bending member 301 is used to bend each sub-bending segment in the bending section to be shaped; the torsion member 302 is used to torsion part or one of the sub-bending segments in the bending section to be shaped, thereby obtaining the initial bending shape required for the three-dimensional bend. Further, the bending member 301 is also a single-piece rigid structure to constrain the distal end of the bending section to be shaped into a preset bending shape. It should be noted that in this embodiment, the bending section to be shaped is divided into a distal end and a proximal end. The distal end is used to form the preset bending shape and may include multiple sub-bending segments, while the proximal end is used to be torsionally rotated to a preset angle by the torsion member 302. Of course, in other embodiments, the torsion member 302 may only be used to accommodate and constrain the proximal end without performing torsion movement.

[0079] Furthermore, the top surface M1 of the bending member 301 is formed with a second curved groove C2 for accommodating the distal end of the section to be shaped. The top surface M1 of the bending member 301 is curved, and the second curved groove C2 extends along the curved surface so that the distal end accommodated within the second curved groove C2 forms the predetermined curved shape. In other words, the second curved groove C2 undulates with the top surface M1 of the bending member 301, thereby forming a three-dimensional curve in three-dimensional space, so that the distal end also forms the three-dimensional curve. Preferably, the bending member 301 is made of metal. On the one hand, metal has better hardness to ensure the bending effect; on the other hand, metal has better thermal conductivity, which is beneficial for subsequent heating and heat dissipation. The internal morphology of the second curved groove C2 is adapted to the external morphology of the distal end to ensure that the distal end is stably accommodated within the second curved groove C2.

[0080] Furthermore, the top surface M1 of the bending member 301 is also formed with at least two clamping grooves to accommodate the clamps 202. The at least two clamping grooves intersect with the second curved groove C2 and are spaced apart along the extension trajectory of the second curved groove C2. As can be seen from the above, during the positioning and bending process, the clamps 202 of the shaping fixture provided in this embodiment always maintain the state of clamping the medical catheter 10. Therefore, the bending member 301 is provided with clamping grooves corresponding to all the clamps 202 clamped at the distal end. If two clamps 202 are clamped at the distal end, then two clamping grooves are correspondingly provided on the bending member 301. If three clamps 202 are clamped at the distal end, then three clamping grooves are correspondingly provided on the bending member 301. Therefore, the number of clamping slots on the fixed bending member 301 is equal to the number of clamps 202 held at the distal end; and the position of the clamping slots on the fixed bending member 301 also corresponds to the position of the clamps 202 held at the distal end, that is, corresponding to Figure 6 The position of the clamping groove corresponding to the distal end mentioned above. For example, the fixed bending member 301 is provided with two clamping grooves, namely a fourth clamping groove T4 and a fifth clamping groove T5, respectively corresponding to... Figure 6 The first clamping slot T1 and the second clamping slot T2 are located in the first clamping slot C2 and the second clamping slot T2, respectively. Based on this, after positioning is completed, the distal end of the section to be shaped and bent can be placed in the second bending slot C2, the fourth clamping slot T4 and the fifth clamping slot T5, respectively, carrying the clamp 202.

[0081] Furthermore, in the fixed bending member 301, the groove direction of each clamp groove is perpendicular to the tangent of the extension trajectory of the adjacent second curved groove C2. It can be understood that the top surface M1 of the fixed bending member 301 is curved, and the second curved groove C2 follows the curved surface to form a three-dimensional curve. Therefore, the distal end will be subjected to various forces provided by the second curved groove C2, causing it to bend into a three-dimensional curve. Thus, in order to accurately determine and adjust the location of the drawstring cavity within the medical catheter 10 on the inner side of the curve, all clamps 202 fixing the medical catheter 10 vertically can avoid adverse effects on the bending of the medical catheter 10 by the second curved groove C2. For example, as... Figure 12 As shown, the groove direction L1 of the fourth clamping groove T4 is perpendicular to the tangent direction L2 of the extension trajectory of the adjacent second curved groove C2. And, as... Figure 13 As shown, the groove direction L3 of the fifth clamp groove T5 is perpendicular to the tangent direction L4 of the extension trajectory of the second curved groove C2 that is connected to it.

[0082] Please see Figure 5 , Figure 11 and Figure 14 The torsion member 302 is disposed on one side of the fixed bending member 301, and the torsion member 302 has a guide groove C3 for accommodating the proximal end of the fixed bending segment to be shaped. Specifically, the torsion member 302 is detachably connected to the side surface M2 of the fixed bending member 301, and the side surface M2 is the surface where the distal end of the fixed bending segment to be shaped meets the proximal end. In other words, the torsion member 302 can fit against the side surface M2 of the fixed bending member 301, so that the second curved groove C2 and the guide groove C3 are joined to form a complete curved groove, which can completely accommodate the fixed bending segment to be shaped. The proximal end of the fixed bending segment to be shaped is located in the guide groove C3, and the distal end is located in the second curved groove C2. Further, the guide groove C3 is disposed on the top surface M3 of the torsion member 302 and extends in a direction perpendicular to the opposite surfaces of the torsion member 302 and the fixed bending member 301. That is, the conduit groove C3 is perpendicular to the side surface M2. In other embodiments, the conduit groove C3 may also be curved, depending on the shaping requirements.

[0083] Furthermore, the top surface M3 of the torsion member 302 also has a clamping groove to accommodate the clamp. The clamping groove intersects with the guide groove C3, and the groove direction of the clamping groove is perpendicular to the extending direction of the guide groove C3. It can be understood that the clamping groove provided on the bending member 301 is used to accommodate the clamp 202 for positioning the distal end of the bending section to be shaped; the clamping groove provided on the torsion member 302 is used to accommodate the clamp 202 for positioning the proximal end of the bending section to be shaped. For example, the top surface of the torsion member 302 is provided with a sixth clamping groove T6. And after the torsion member 302 is connected to the bending member 301, the clamp 202 contained in the sixth clamping groove T6 and the fifth clamping groove T5 can be positioned. Figure 6 The second sub-bending segment is shown. That is, the sixth clamping groove T6 corresponds to the third clamping groove T3 on the positioning member 201, the fifth clamping groove T5 corresponds to the second clamping groove T2, and the fourth clamping groove T4 corresponds to the first clamping groove T1, so that after the medical catheter 10 is positioned on the positioning member 201, it can carry all the clamps 202 and be installed in the fixed bending mold 30. Therefore, the clamping grooves in the positioning member 201 correspond one-to-one with the clamping grooves in the fixed bending mold 30, and the position of each clamping groove in the positioning member 201 relative to the medical catheter 10 is the same as the position of each clamping groove in the fixed bending mold 30 relative to the medical catheter 10. It should be noted that the structure of the clamping grooves in the fixed bending member 301 and the torsion member 302 is completely consistent with the structure of the clamping grooves in the positioning member 201.

[0084] Furthermore, the torsion member 302 is rotatable relative to the fixed bending member 301, so that the proximal end is twisted to a preset angle. Preferably, the opposing surfaces of the fixed bending member 301 and the torsion member 302 are respectively provided with an arc-shaped groove C4 and a connecting end 3021 adapted to the arc-shaped groove C4, so that the fixed bending member 301 and the torsion member 302 can be rotatably connected. Optionally, the arc-shaped groove C4 is provided on the side surface M2 of the fixed bending member 301, and the connecting end 3021 is located on the torsion member 302; or, the arc-shaped groove C4 is provided on the opposing surfaces of the torsion member 302 and the fixed bending member 301, and the connecting end 3021 is located on the side surface M2 of the fixed bending member 301. This embodiment does not specifically limit this. For example, as shown... Figure 11 and Figure 14As shown, the arc-shaped groove C4 is disposed on the side M2 ​​of the fixed bending member 301, and the connecting end 3021 is located on the surface of the torsion member 302 opposite to the side M2. The connecting end 3021 is also arc-shaped and can extend into the arc-shaped groove C4 and be engaged in the arc-shaped groove C4. This allows the fixed bending member 301 and the torsion member 302 to be detachably connected, and also allows the torsion member 302 to rotate relative to the fixed bending member 301.

[0085] Preferably, the arc-shaped groove C4 and the connecting end 3021 form a semi-circular arc, so that the torsion range of the torsion member 302 relative to the fixed bending member 301 is 0 degrees to 180 degrees; and generally the torsion angle range is 90 degrees to 180 degrees. The rotation center of the arc-shaped groove C4, i.e., the center of its circular shape, is the intersection of the central axis of the second curved groove C2 and the side surface M2 of the fixed bending member 301. Based on this, the torsion member 302 has a semi-cylindrical shape. Figure 14 As shown, the top surface M3 of the torsion member 302 is a semi-cylindrical axial section, and both the guide groove C3 and the clamp groove are disposed on the top surface M3 of the torsion member 302; and the side wall M4 of the torsion member 302 is a semi-cylindrical outer periphery, and a plurality of positioning grooves C5 are provided at intervals on the outer periphery surface. The positioning grooves C5 are used for mating Figure 15 The pin 303 shown locks the rotational position of the torsion member 302 relative to the fixed bending member 301. Specifically, the positioning groove C5 is linear, and its internal shape is adapted to the outer periphery of the pin 303 so that the pin 303 can be inserted into the positioning groove C5. Each positioning groove C5 extends in a direction perpendicular to the opposing surfaces of the torsion member 302 and the fixed bending member 301. That is, the extending direction of the positioning groove C5 is perpendicular to the side surface M2 of the fixed bending member 301. Furthermore, the included angle between adjacent positioning grooves C5 relative to the rotation axis of the torsion member 302 is equal. The included angle is less than 180 degrees. For example, if the included angle between adjacent positioning grooves C5 is 30 degrees, then four positioning grooves C5 are evenly arranged on the side wall M4 of the torsion member 302. Thus, the torsion member 302 increases its torsion angle by 30 degrees each time it is torsionally rotated to a positioning groove C5. Alternatively, if the included angle between adjacent positioning grooves C5 is 45 degrees, then two positioning grooves C5 are evenly provided on the side wall M4 of the torsion member 302. Each time the torsion member 302 is torn to a positioning groove C5, the torsion angle increases by 45 degrees. Therefore, the number of positioning grooves C5 determines the resolution of the torsion angle of the torsion member 302. Furthermore, based on the included angle between the positioning grooves C5, the required torsion angle of the torsion member 302 can be accurately calculated to ensure that the draw wire cavity is located on the inner side of the bend.

[0086] Furthermore, such as Figure 11 , Figure 14 and Figure 15 As shown, the side M2 ​​of the fixed bending member 301 is also provided with a blind hole C6. The pin 303 can be inserted into the positioning groove C5 and extend into the blind hole C6 to limit the rotation angle of the torsion member 302 relative to the fixed bending member 301. It can be understood that when the torsion member 302 is twisted to a preset angle, there will always be a positioning groove C5 corresponding to the blind hole C6. Then the pin 303 extends through the positioning groove C5 and is inserted into the blind hole C6 to lock the position of the torsion member 302 relative to the fixed bending member 301, thereby locking the torsion angle of the torsion member 302 and ensuring the stability of the torsion. Therefore, the torsion member 302 provided in this embodiment can achieve torsion of the proximal end of the segment to be shaped without affecting the shaping of the distal end of the segment to be shaped by the bending member 301, and can clearly define the specific angle of torsion, maintain the stability of torsion, thereby ensuring that the draw tube cavity in the medical catheter 10 can be located inside the bend, which is conducive to obtaining a stable three-dimensional bend shape.

[0087] Please continue reading. Figure 5 , Figure 11 , Figure 14 , Figure 16 and Figure 17During the bending and twisting processes, although the clamp 202 provides positioning and holding to prevent the medical catheter 10 from detaching from the groove, the stress on each sub-bending segment varies. Relying solely on the clamp 202 for stability makes it difficult to ensure that all sub-bending segments are bound within the groove. In particular, the medical catheter 10 located at the junction of the bending member 301 and the twisting member 302 is prone to popping out of the groove. Therefore, the bending mold 30 provided in this embodiment is provided with a first cover plate groove C7 and a second cover plate groove C8 at the junction of the bending member 301 and the twisting member 302, and correspondingly provided with a first cover plate 304 and a second cover plate 305 to constrain the medical catheter 10 within the groove. For example, the first cover plate groove C7 is located on the top surface M1 of the bending member 301 and is provided along the side of the second curved groove C2 near the side surface M2, so that the first cover plate 304 covers the medical catheter 10 within the second curved groove C2. The first cover plate 304 has a connecting portion on the side facing the top surface M1 of the bending member 301. This connecting portion can extend into and engage with the first cover plate groove C7. The other side of the first cover plate 304 can extend to the opening of the second curved groove C2 to cover the medical catheter 10 within the second curved groove C2, preventing it from detaching from the second curved groove C2 during bending and twisting. Similarly, the second cover plate groove C8 is located on the top surface M3 of the twisting member 302 and is disposed on one side of the catheter groove C3, preferably near the side M2 ​​of the bending member 301. The second cover plate 305 can be inserted into the second cover plate groove C8 to cover the opening of the catheter groove C3, thereby confining the medical catheter 10 within the catheter groove C3 and ensuring stability during bending and twisting. It should be noted that this embodiment does not limit the specific number and shape of the first cover plate groove C7, the second cover plate groove C8, the first cover plate 304 and the second cover plate 305. They can be set on the top surface M1 of the fixed bending member 301 and the top surface M3 of the torsion member 302 according to the specific situation of fixed bending and torsion.

[0088] For further details, please refer to Figure 11 The sidewall of the bending member 301 is also provided with a plurality of heat-conducting grooves C9 to accelerate heat conduction and meet the heating and heat dissipation needs during the bending process. For example, the bending member 301 is provided with two heat-conducting grooves C9, which are respectively provided on two opposite sidewalls.

[0089] To further illustrate the shaping tooling provided in this embodiment, this embodiment uses a medical catheter shaping method to explain how to use the shaping tooling to shape the medical catheter 10.

[0090] Please see Figures 18 to 22This embodiment also provides a method for shaping a medical catheter, including:

[0091] Step 1 S10: The section of the medical catheter 10 to be shaped and bent is placed in the first curved groove C1 of the positioning member 201, and each sub-curved section of the section to be shaped and bent is clamped and positioned by multiple clamps 202.

[0092] Please see Figure 19 First, multiple clamps 20 are placed in the clamp slots of the positioning member 201, with all clamps 20 in the open state. Then, the distal end of the section to be shaped and bent of the medical catheter 10 is bent to approximately 90 degrees and then embedded into the first bent groove C1. Finally, each clamp 202 is closed to clamp and position each sub-bend segment in the section to be shaped and bent. During the placement of the medical catheter 10, it is necessary to ensure that the drawstring cavity within the medical catheter 10 is located on the inside of the bend. For example, if the drawstring cavity is biased towards the right side of the medical catheter 10, then when placing the medical catheter 10, its right side should be biased towards the bend side of the first bent groove C1.

[0093] As can be seen, in step S10, the positioning member 201 and each of the clamps 202 complete the positioning of each of the sub-bending segments in the section to be shaped and bent. That is, there is a sub-bending segment between two adjacent clamps 202. And under the clamping and fixing of the clamps 202, it is beneficial to stabilize the subsequent bending and torsion of each of the sub-bending segments.

[0094] Step 2 S20: Place the section to be shaped and the plurality of clamps 202 together in the bending mold 30; wherein, the distal end of the section to be shaped is accommodated in the second bending groove C2 of the bending member 301, and the proximal end of the section to be shaped is accommodated in the guide groove C3 of the torsion member 302.

[0095] Please see Figure 20 and Figure 21To ensure the bend retention effect of each sub-bending segment, during the movement of the medical catheter 10 to the bend retention member 301 and the torsion member 302, all clamps 202 maintain the positioning and clamping of each sub-bending segment. Since the bend retention member 301 and the torsion member 302 have corresponding clamping grooves, each clamp 202 can be directly installed in its corresponding clamping groove. Simultaneously, the second bending groove C2 of the bend retention member 301 constrains the shape of each sub-bending segment at the distal end of the segment to be shaped, ensuring that the proximal end of the segment to be shaped bends into a preset shape. It is understood that, under the combined action of each clamp 202 and the preset second bending groove C2, the distal end of the segment to be shaped not only forms a preset bending shape but also ensures that its internal draw tube cavity is located inside the bend, facilitating the formation of a stable three-dimensional bending shape. Furthermore, the proximal end of the section to be shaped and bent will be accommodated within the catheter groove C3 and conform to the shape of the catheter groove C3. It should be noted that after the section to be shaped and bent is installed in the second curved groove C2 and the catheter groove C3, the first cover plate 304 and the second cover plate 305 are installed in the corresponding grooves to cover the corresponding portions of the second curved groove C2 and the catheter groove C3, preventing the medical catheter 10 from protruding from the grooves and affecting the bending effect.

[0096] Step 3S30: Heat the bending die 30 to give the distal end a preset bending shape.

[0097] After constraining the distal end of the section to be shaped into a preset curved shape, the bending mold 30 is placed entirely within the heating chamber to heat and shape the distal end. Optionally, the heat treatment temperature is 130 degrees Celsius, and the heating time is 10 minutes.

[0098] Step 4 S40: The torsion member 302 rotates relative to the fixed bending member 301 so that the proximal end is twisted to a preset angle.

[0099] Please see Figure 22 After heating and bending, the medical catheter 10 maintains a high temperature, making it easier to twist. Specifically, after heating, the pin 303 is pulled out, and the twisting member 302 is directly twisted to a preset angle. Then, the pin 303 is inserted to fix the position of the twisting member 302 relative to the bending member 301. Therefore, the shaping fixture and method provided in this embodiment can achieve both bending and twisting effects using the same bending mold 30. Compared to the prior art, which separates bending and twisting into two separate operations, this embodiment is simpler to operate and more efficient in both. The rotation direction and twisting angle of the twisting member 302 can be determined based on the position of the draw tube cavity and the shape of the three-dimensional bend.

[0100] Step 5 S50: Heat the fixed bending mold 30 so that the proximal end has a preset torsion angle.

[0101] To obtain a stable morphology after torsion, after fixing the position of the torsion member 302, the torsioned medical catheter 10 needs to be further heated and shaped. Optionally, the heat treatment temperature is 130 degrees Celsius, and the heating time is 20 minutes. Of course, the heating temperature and heating time can be adjusted appropriately according to the material and degree of torsion.

[0102] After heat treatment, the medical catheter 10 needs to be cooled to room temperature, thus completing the shaping of the medical catheter 10. Subsequently, the clamp 202, the first cover plate 304, and the second cover plate 305 can be removed to take out the shaped medical catheter 10. It should be noted that during heating and cooling, the heat-conducting groove C9 on the bending member 301 provides good heat conduction, enhancing the heating and cooling rates. Preferably, during cooling, cooling gas or water can be introduced into the pre-set airflow or water flow channels inside the bending mold 30 to assist in cooling.

[0103] In summary, the shaping fixture and method for the medical catheter provided in this embodiment utilizes the first curved groove C1 and multiple clamps 202 to accurately position each sub-bending segment of the medical catheter 10 to be shaped. Furthermore, the second curved groove C2 simultaneously bends each sub-bending segment of the to-bend segment. The stability of the bending process is ensured by the fixed clamping of the clamps 202. In addition, the torsion member 302 can torsion the proximal end of the to-bend segment to a preset angle without affecting the bending effect. Since the bending shape of the second curved groove C2 is preset, it ensures that the drawer cavity in each sub-bending segment is located inside the bend during the bending process. Furthermore, the preset angle of the torsion member 302 can be accurately calculated to ensure that the drawer cavity is located inside the bend after torsion, thereby obtaining a stable three-dimensional bending shape. Therefore, the shaping fixture for the medical catheter provided in this embodiment can not only simultaneously realize the two processes of bending and twisting, simplifying the process and improving the shaping efficiency, but also has a good shaping effect and strong shaping stability.

[0104] Furthermore, it should be understood that although the present invention has been disclosed above with reference to preferred embodiments, these embodiments are not intended to limit the present invention. For any person skilled in the art, many possible variations and modifications can be made to the technical solutions of the present invention based on the disclosed technical content, or equivalent embodiments can be modified accordingly, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, shall still fall within the scope of protection of the present invention.

Claims

1. A shaping fixture for a medical catheter, the medical catheter having a section to be shaped and bent, and the section to be shaped and bent comprising a plurality of sub-bending sections, characterized in that, include: Positioning molds and bending molds; The positioning mold includes a positioning element and multiple clamps; the positioning element has a first curved groove for accommodating the segment to be shaped and bent; the multiple clamps are at least disposed within the positioning element to clamp and position each of the sub-bending segments respectively; The bending die includes a bending member and a torsion member; the bending member has a second curved groove for accommodating the distal end of the bending segment to be shaped and defining the distal end as a preset curved shape; the torsion member is disposed on one side of the bending member and has a guide groove for accommodating the proximal end of the bending segment to be shaped; and the torsion member is rotatable relative to the bending member to twist the proximal end to a preset angle. The fixed bending member also has at least two clamping slots to accommodate the clamps; the at least two clamping slots intersect with the second curved groove and are spaced apart on the extension trajectory of the second curved groove; wherein the groove direction of each clamping slot is perpendicular to the tangent of the extension trajectory of the adjacent second curved groove. The fixed bending member and the torsion member are respectively provided with arc-shaped grooves and connecting ends adapted to the arc-shaped grooves on their opposite surfaces, so that the fixed bending member and the torsion member can be rotatably connected.

2. The shaping fixture for medical catheters according to claim 1, characterized in that, The top surface of the fixed bending member is curved, and the second curved groove extends along the curved surface so that the distal end, which is accommodated in the second curved groove, has the preset curved shape.

3. The shaping fixture for medical catheters according to claim 1, characterized in that, The torsion member also has a plurality of positioning grooves, which are distributed at intervals along the circumference of the torsion member and extend in a direction perpendicular to the opposite surface of the torsion member and the fixed bending member; wherein, relative to the rotation axis of the torsion member, the included angle between adjacent positioning grooves is equal.

4. The shaping fixture for medical catheters according to claim 3, characterized in that, The fixed bending mold also includes a pin, and the surface of the fixed bending member relative to the torsion member is provided with a blind hole; the pin can be inserted into the positioning groove and extend into the blind hole to limit the rotation angle of the torsion member relative to the fixed bending member.

5. The shaping fixture for medical catheters according to claim 1, characterized in that, The guide groove is disposed on the top surface of the torsion member and extends in a direction perpendicular to the opposite face of the torsion member and the fixed bending member; and the torsion member also has a clamping groove for accommodating the clamp; the clamping groove intersects with the guide groove, and the groove direction of the clamping groove is perpendicular to the extending direction of the guide groove.

6. The shaping fixture for medical catheters according to claim 1, characterized in that, The positioning member also has a plurality of clamping slots for accommodating the clamps; wherein the plurality of clamping slots and the first curved slot are both disposed on the top surface of the positioning member, and the plurality of clamping slots are spaced apart on the extension trajectory of the first curved slot; and, the slot direction of some of the clamping slots is perpendicular to the top surface of the positioning member, and the slot direction of some of the clamping slots forms an acute angle with the top surface of the positioning member.

7. The shaping fixture for medical catheters according to claim 1, 5, or 6, characterized in that, The clamping grooves in the positioning component correspond one-to-one with the clamping grooves in the bending die, and the positions of each clamping groove in the positioning component relative to the medical catheter are the same as the positions of each clamping groove in the bending die relative to the medical catheter; and, The fixture slot is provided with a slide rail, and the fixture is provided with a slide groove that matches the slide rail, so that the fixture can be detachably connected to the fixture slot.

8. The shaping fixture for medical catheters according to claim 1, characterized in that, The top surfaces of the fixed bending member and the torsion member are respectively provided with a first cover plate groove and a second cover plate groove; wherein, the first cover plate groove and the second cover plate groove are close to the intersection of the fixed bending member and the torsion member, and the first cover plate groove is provided near a portion of the second bending groove, and the second cover plate groove is provided near a portion of the guide groove. The fixed bending mold further includes a first cover plate and a second cover plate; the first cover plate and the second cover plate can be respectively inserted into the first cover plate groove and the second cover plate groove to cover part of the second bending groove and part of the guide groove respectively; In addition, the side wall of the fixed bending member is provided with several heat conduction grooves.

9. The shaping fixture for medical catheters according to claim 1, characterized in that, The clamp includes an upper clamping plate, a lower clamping plate, a connecting shaft, and a locking member; one end of the upper clamping plate and the lower clamping plate are respectively connected to the connecting shaft so that the upper clamping plate and the lower clamping plate can rotate relative to each other and clamp the medical catheter; the other end of the upper clamping plate and the lower clamping plate can be respectively connected to the locking member so that the relative position of the upper clamping plate and the lower clamping plate is fixed by the locking member.

10. A method for shaping a medical catheter, characterized in that, Using the shaping fixture for medical catheters as described in any one of claims 1 to 9, the shaping method for the medical catheter includes: The medical catheter to be shaped and bent is housed in the first bent groove of the positioning member, and the various sub-bents of the to be shaped and bent are clamped and positioned by multiple clamps. The section to be shaped and the plurality of fixtures are placed together in the bending mold; wherein, the distal end of the section to be shaped is accommodated in the second bending groove of the bending member, and the proximal end of the section to be shaped is accommodated in the guide groove of the torsion member. The bending die is heated to give the distal end a preset bending shape; The torsion member is rotated relative to the fixed bending member to twist the proximal end to a preset angle; The bending die is heated so that the proximal end has a preset torsion angle.

11. The method for shaping a medical catheter according to claim 10, characterized in that, During the process of placing the bend to be shaped and the plurality of clamps together in the bend mold, the plurality of clamps maintain the clamping of each of the sub-bends of the bend to be shaped.

Images