Pretreatment equipment and methods for interventional guidewires

Abstract

This invention discloses an interventional guidewire pretreatment device and method, including a flattening device, a heat treatment device, and a polishing device. The flattening device is used to flatten the distal end of the guidewire core wire, the heat treatment device is used to heat-treat the distal end of the guidewire core wire, and the polishing device is used to polish the distal end of the guidewire core wire. The flattening device includes a control unit, a protective grating, a fixing clamp, a lower flattening mold, an upper flattening mold, and a pressure mechanism. The fixing clamp is located on one side of the lower flattening mold, and the lower flattening mold is located below the upper flattening mold. This invention includes three steps: guidewire core wire distal end flattening, guidewire core wire distal end heat treatment, and guidewire core wire distal end polishing. The product after these three processes has good shaping and shape retention capabilities in clinical use. Compared with traditional guidewire products, the guidewires produced by this method have a higher yield, better shaping ability, and superior shape retention capability.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of interventional guide wire processing, in particular to an interventional guide wire pretreatment device and method. BACKGROUND

[0002] At present, in order to make the guide wire pass through the relatively tortuous blood vessels, the head end of the guide wire is usually shaped into a certain shape, usually a "C" shape, a "J" shape or an "S" shape. The conventional guide wire is difficult to shape into an ideal shape due to the resistance to deformation of the guide wire itself, or the shape of the guide wire is difficult to maintain after shaping, and the shaping disappears in use, which cannot continue to pass in the blood vessels, which increases the difficulty of the operator's operation. Based on this background, we perform certain pretreatment on the guide wire core wire, which can make the guide wire product one-time forming in use, and can be shaped into different shapes according to the needs of the operator, and the shape maintaining ability is excellent after shaping. SUMMARY

[0003] In order to solve the above technical problems, the present application provides an interventional guide wire pretreatment device, which comprises a flattening device, a heat treatment device and a polishing device, the flattening device is used for flattening the distal end of the guide wire core wire, the heat treatment device is used for heat treatment of the distal end of the guide wire core wire, and the polishing device is used for polishing treatment of the distal end of the guide wire core wire.

[0004] Preferably, the flattening device comprises a control unit, a protection grating, a fixed clamp, a lower flattening die, an upper flattening die and a pressure mechanism, the fixed clamp is located on one side of the lower flattening die, the lower flattening die is located below the upper flattening die, and the upper flattening die is fixedly connected with the pressure mechanism.

[0005] Preferably, the lower flattening die and the upper flattening die are composed of two high parallelism and flatness tungsten steel blocks.

[0006] Preferably, the flattening force of the pressure mechanism reaches 1500kgf-1700kgf, preferably, the flattening force is 1600kgf, and the pressure holding time is 3-5 seconds.

[0007] Preferably, the heat treatment device comprises a heating device, a core wire distal end fixing device and a core wire proximal end fixing device, the heating device is heated to 500-700 DEG C, and after staying at this temperature for 10-30 min, the whole is naturally cooled.

[0008] Preferably, the core wire distal end fixing device comprises a core wire placing base, a core wire pressing guide plate is installed at the upper end of the core wire placing base, a core wire pressing block capable of sliding up and down is installed in the core wire pressing guide plate, and the core wire pressing block is hinged with a core wire pressing cam.

[0009] Preferably, the proximal end fixing device of the core wire comprises a support, a plurality of core wire guide nozzles are installed on the support, the core wire guide nozzles are connected with core wire tension springs, the other ends of the core wire tension springs are connected with the proximal end clamping device of the core wire, and the proximal end clamping device of the core wire is provided with a clamping device back-pushing cam on one side.

[0010] Preferably, the polishing device comprises a control panel, a bracket, a rotating unit and a polishing unit, the rotating unit fixes the proximal end of the guide wire core wire, and the distal end of the guide wire core wire is placed at the polishing unit.

[0011] Preferably, sandpaper for polishing is fixed on the upper and lower sides inside the polishing unit.

[0012] The intervention guide wire pretreatment method specifically comprises the following steps:

[0013] S1, fixing the distal end of the guide wire core wire on a flattening device, and flattening the distal end of the guide wire core wire through the flattening device;

[0014] S2, fixing the flattened distal end of the guide wire core wire on a heat treatment device, and heating and heat-treating the distal end of the guide wire core wire through the heat treatment device;

[0015] S3, fixing the heat-treated guide wire core wire on a polishing device, and polishing the distal end of the guide wire core wire through the polishing device;

[0016] S4, shaping the guide wire after the above treatment by using a shaping tool, and shaping the guide wire into a "C" shape at one time, and shaping the guide wire into an "S" shape through twice shaping.

[0017] The technical effects and advantages of the present application are as follows:

[0018] The present application comprises three steps of flattening the distal end of the guide wire core wire, heat-treating the distal end of the guide wire core wire and polishing the distal end of the guide wire core wire, and the product after the three process treatments has good shaping ability and shaping retention ability in clinical use, compared with the traditional guide wire product, the guide wire produced after the treatment has higher yield, better shaping ability and better shaping retention ability. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 is a structure schematic view of the flattening device in embodiment 2 of the present application;

[0020] Fig. 2 is a partial enlarged structure schematic view of the flattening device in embodiment 2 of the present application;

[0021] Fig. 3 is a structure schematic view of the heat treatment device in embodiment 3 of the present application;

[0022] Fig. 4 is a structure schematic view of the distal end fixing device of the core wire in embodiment 3 of the present application;

[0023] Fig. 5 is the structural schematic diagram of the proximal end fixing device of the core wire in embodiment 3 of the present application;

[0024] Fig. 6 is the structural schematic diagram of the polishing device in embodiment 4 of the present application;

[0025] Fig. 7 is the structural diagram of the surface of the core wire after heat treatment in embodiment 5 of the present application;

[0026] Fig. 8 is the structural diagram of the surface of the core wire after polishing in embodiment 5 of the present application.

[0027] In the figure: 1, flattening device; 2, control unit; 3, protection grating; 4, fixed clamp; 5, lower flattening die; 6, upper flattening die; 7, pressure mechanism; 8, heat treatment device; 9, heating device; 10, distal end fixing device of core wire; 11, proximal end fixing device of core wire; 111, bracket; 12, core wire placing base; 13, core wire pressing guide plate; 14, core wire pressing cam; 15, core wire pressing block; 16, core wire guide nozzle; 17, core wire tension spring; 18, core wire proximal end clamping device; 19, clamping device back-pushing cam; 20, polishing device; 21, control panel; 22, bracket; 23, rotating unit; 24, polishing unit. DETAILED DESCRIPTION

[0028] The present application will be further described in conjunction with the drawings and specific embodiments. The embodiments of the present application are given for illustration and description only, and are not intended to be exhaustive or to limit the present application to the forms disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. Embodiments were chosen and described in order to best explain the principles of the present application and its practical application, and to enable others skilled in the art to understand the present application for various embodiments with various modifications as are suited to the particular use contemplated.

[0029] Embodiment 1

[0030] In the present embodiment, an interventional guide wire pretreatment device is provided, which comprises a flattening device 1 for flattening the distal end of the core wire of the guide wire, a heat treatment device 8 for heat treatment of the distal end of the core wire of the guide wire, and a polishing device 20 for polishing treatment of the distal end of the core wire of the guide wire. After the three processes, the guide wire has good shaping ability and shaping retention ability when used clinically.

[0031] Embodiment 2

[0032] Please refer to Figs. 1-2The intervention guide wire pretreatment device provided in the embodiment comprises a flattening device 1, which comprises a control unit 2, a protection grating 3, a fixed clamp 4, a lower flattening die 5, an upper flattening die 6 and a pressure mechanism 7. The fixed clamp 4 is located on one side of the lower flattening die 5, the lower flattening die 5 is located below the upper flattening die 6, the upper flattening die 6 is fixedly connected with the pressure mechanism 7, the lower flattening die 5 and the upper flattening die 6 are composed of two high-parallelism and high-flatness tungsten steel blocks, and the fixed clamp 4 is used for fixing the guide wire core wire. After the guide wire core wire is placed, the pressure mechanism 7 is started, the upper flattening die 6 is pressed towards the guide wire core wire, so that the uniform cylindrical end of the distal end of the guide wire core wire is flattened into a flat shape. The flattening device eliminates the isotropy of the guide wire core wire, and the guide wire core wire preliminarily has the plasticity. The flattening force is 1500kgf-1700kgf, and preferably, the flattening force is 1600kgf, and the pressure holding time is 3-5 seconds.

[0033] Embodiment 3

[0034] Please refer to Figs. 3-5 The intervention guide wire pretreatment device provided in the embodiment comprises a flattening device 1, which comprises a control unit 2, a protection grating 3, a fixed clamp 4, a lower flattening die 5, an upper flattening die 6 and a pressure mechanism 7. The fixed clamp 4 is located on one side of the lower flattening die 5, the lower flattening die 5 is located below the upper flattening die 6, the upper flattening die 6 is fixedly connected with the pressure mechanism 7, the lower flattening die 5 and the upper flattening die 6 are composed of two high-parallelism and high-flatness tungsten steel blocks, and the fixed clamp 4 is used for fixing the guide wire core wire. After the guide wire core wire is placed, the pressure mechanism 7 is started, the upper flattening die 6 is pressed towards the guide wire core wire, so that the uniform cylindrical end of the distal end of the guide wire core wire is flattened into a flat shape. The flattening device eliminates the isotropy of the guide wire core wire, and the guide wire core wire preliminarily has the plasticity. The flattening force is 1500kgf-1700kgf, and preferably, the flattening force is 1600kgf, and the pressure holding time is 3-5 seconds.

[0035] Embodiment 4

[0036] Please refer to Fig. 6In the embodiment, an interventional guide wire pretreatment device is provided, which comprises a polishing device 20, the polishing device 20 comprising a control panel 21, a bracket 22, a rotating unit 23 and a polishing unit 24, the rotating unit 23 fixing the proximal end of the guide wire core wire, the distal end of the guide wire core wire being placed at the polishing unit 24, sandpaper for polishing being fixed on the upper and lower sides inside the polishing unit 24, during polishing, the upper and lower sides of the sandpaper approach the core wire until the core wire is clamped, then the sandpaper part moves to the distal end, the sandpaper rubs the surface of the core wire, and the whole polishing process is completed, when the next polishing process starts, the clamping angle of the fixed core wire is rotated by a certain angle, so that the distal end of the core wire can be polished at various angles, the surface of the core wire can be removed, the surface oxidation layer possibly generated during the heat treatment of the distal end of the guide wire core wire can be removed, and the reliability of the subsequent production process is higher.

[0037] Embodiment 5

[0038] In the embodiment, an interventional guide wire pretreatment method is provided, which specifically comprises the following steps:

[0039] S1, fixing the distal end of the guide wire core wire on the flattening device 1, and flattening the distal end of the guide wire core wire through the flattening device 1;

[0040] S2, fixing the distal end of the flattened guide wire core wire on the heat treatment device 8, and heating and heat treating the distal end of the guide wire core wire through the heat treatment device 8;

[0041] S3, fixing the heat treated guide wire core wire on the polishing device 20, and polishing the distal end of the guide wire core wire through the polishing device 20;

[0042] S4, shaping the guide wire after the above treatment by using a shaping tool, and shaping the guide wire into a "C" shape at one time, and shaping the guide wire into an "S" shape through two times of shaping.

[0043] During the shaping retention ability test, the shaped guide wire is inserted into the shaping retention tool, the proximal end of the guide wire is alternately twisted left and right for 10 times, and the change in the shaping angle is less than or equal to 15°.

[0044] The working principle of the present application is as follows:

[0045] The present application comprises three steps of flattening the distal end of the guide wire core wire, heat treating the distal end of the guide wire core wire and polishing the distal end of the guide wire core wire, and the product after the three process treatments has good shaping ability and shaping retention ability in clinical use, the tensile strength of the treated guide wire core wire is 785 MPa, and the elongation at break is 17% (gauge length 15 mm, speed 10 mm / min).

[0046] Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art and related fields without creative labor should belong to the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application are implemented according to the conventional means in the art, if not specifically described and limited.

Claims

1. An intervention guide wire pre-treatment device, characterized in that, The device comprises a flattening device (1), a heat treatment device (8) and a polishing device (20), the flattening device (1) is used for flattening the distal end of the guide wire core, the heat treatment device (8) is used for heat treatment of the distal end of the guide wire core, and the polishing device (20) is used for polishing treatment of the distal end of the guide wire core. The flattening device (1) comprises a control unit (2), a protection grating (3), a fixed clamp (4), a lower flattening die (5), an upper flattening die (6) and a pressure mechanism (7), the fixed clamp (4) is located on one side of the lower flattening die (5), the lower flattening die (5) is located below the upper flattening die (6), and the upper flattening die (6) is fixedly connected with the pressure mechanism (7). The heat treatment device (8) comprises a heating device (9), a core distal end fixing device (10) and a core proximal end fixing device (11), the heating device (9) is heated to 500-700℃, and after staying at this temperature for 10-30min, the whole is naturally cooled; The core distal end fixing device (10) comprises a core placing base (12), a core pressing guide plate (13) is installed at the upper end of the core placing base (12), a core pressing block (15) capable of sliding up and down is installed in the core pressing guide plate (13), and the core pressing block (15) is hinged with a core pressing cam (14); The core proximal end fixing device (11) comprises a support (111), a plurality of core guide nozzles (16) are installed on the support (111), the core guide nozzles (16) are connected with core tension springs (17), the other ends of the core tension springs (17) are connected with a core proximal end clamping device (18), and one side of the core proximal end clamping device (18) is provided with a clamping device return cam (19).

2. The interventional guidewire pretreatment device of claim 1, wherein, The lower flattening die (5) and the upper flattening die (6) are composed of two high parallelism and flatness tungsten steel blocks.

3. The interventional guidewire pretreatment device of claim 1, wherein, The flattening force of the pressure mechanism (7) reaches 1500kgf-1700kgf, and the pressure holding time is 3-5 seconds.

4. The interventional guidewire pretreatment device of claim 1, wherein, The flattening force of the pressure mechanism (7) is selected as 1600kgf, and the pressure holding time is 3-5 seconds.

5. The interventional guidewire pretreatment device of claim 1, wherein, The polishing device (20) comprises a control panel (21), a bracket (22), a rotating unit (23) and a polishing unit (24), the rotating unit (23) fixes the proximal end of the guide wire core, and the distal end of the guide wire core is placed at the polishing unit (24).

6. The interventional guidewire pretreatment device of claim 5, wherein, Sandpaper for polishing is fixed inside the polishing unit (24).

7. A treatment method using the interventional guide wire pretreatment apparatus according to any one of claims 1 to 6, characterized by, The device comprises the following steps: S1, fixing the distal end of the guide wire core on the flattening device (1), and flattening the distal end of the guide wire core by the flattening device (1); S2, fixing the flattened distal end of the guide wire core on the heat treatment device (8), and heat treating the distal end of the guide wire core by the heat treatment device (8); S3, fixing the heat treated guide wire core on the polishing device (20), and polishing the distal end of the guide wire core by the polishing device (20); S4, shaping the treated guide wire core by using a shaping tool, and shaping into a "C" shape once, and shaping into an "S" shape twice.

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