A method for manufacturing a stent

Abstract

The application discloses a stent manufacturing method, comprising the following steps: forming, making one end of a main frame body into a closed loop structure, threading the closed loop structure onto a connecting piece, and bundling the other end of the main frame body into a bundling piece at the distal end of a lead screw, and then performing heat setting treatment; assembling, installing a control knob onto a control assembly, and connecting the proximal end of the lead screw to the control knob, so that the control knob can push / pull the lead screw; and welding, welding the connecting piece to the control assembly. In this way, the lead screw is pushed and pulled by operating the control knob, the distal end of the main frame body is moved by the lead screw, the main frame body is zoomed, and different sizes of blood vessels can be adapted, so that the stent has high versatility, different stents do not need to be replaced, and time and labor are saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a stent manufacturing method. BACKGROUND

[0002] Stroke is the most common life-threatening intracranial vascular disease, including ischemic or hemorrhagic temporary or permanent impact on brain regions or lesions of cerebral vascular disease. Thrombosis is a more common ischemic stroke. Stent thrombectomy is a kind of neurointerventional therapy for ischemic stroke, through X-ray fluoroscopy, through a group of catheters, the instrument can be implanted into the thrombus position of the patient's artery, and the thrombus can be removed from the patient's artery.

[0003] At present, the commonly used thrombus stent is generally used for thrombectomy by using the self-expanding function of the stent. Such a thrombus stent generally has a large size, consumes different specifications for different sizes of blood vessels, has poor versatility, and consumes time and effort to replace different stents. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a stent manufacturing method, which adjusts the control knob of the adjusting assembly to push and pull the lead screw, so that the lead screw drives the main frame body connected to the lead screw to zoom, thereby enhancing the versatility of the stent and adapting to different sizes of blood vessels for thrombectomy.

[0005] A stent manufacturing method according to an embodiment of the present application comprises the following steps:

[0006] Forming, one end of the main frame body is made into a closed loop structure, the closed loop structure is arranged on the connecting piece, and the other end of the main frame body is collected into the collection piece at the distal end of the lead screw, and then heat setting treatment is performed;

[0007] Assembling, the control knob is installed on the adjusting assembly, and the proximal end of the lead screw is connected to the control knob, so that the control knob can push / pull the lead screw;

[0008] Welding, the connecting piece is welded to the adjusting assembly.

[0009] A stent manufacturing method according to an embodiment of the present application has at least the following beneficial effects: the distal end of the main frame body of the mesh skeleton is collected in the collection piece of the lead screw, the closed loop structure at the proximal end is arranged on the connecting piece for heat setting treatment, the other end of the lead screw is connected to the control knob of the adjusting assembly, the connecting piece is welded to the adjusting assembly, the lead screw is pushed and pulled by operating the control knob, the distal end of the main frame body is moved by the lead screw, so that the main frame body is zoomed to adapt to different sizes of blood vessels, and the versatility is strong, different stents do not need to be replaced, time and effort are saved.

[0010] According to some embodiments of the present application, in the forming step, the connector is provided with a plurality of through holes, and two ends of each of the closed loop structures are respectively distributed in two of the through holes, or each of the closed loop structures is individually distributed in each of the through holes.

[0011] According to some embodiments of the present application, in the forming step, the main frame body is a woven net framework structure, and two ends of each of the closed loop structures are respectively distributed in two of the through holes, and the specific weaving step is as follows:

[0012] S1, one or more wires are passed through the through holes of the connector and then passed out through another through hole to form the closed loop structure;

[0013] S2, the wires passed out of the two through holes are woven to form a net framework structure.

[0014] According to some embodiments of the present application, in the forming step, the main frame body is a woven net framework structure, and each of the closed loop structures is individually distributed in each of the through holes, and the specific weaving step is as follows:

[0015] S1, one or more wires are passed through the through holes of the connector to form the closed loop structure;

[0016] S2, the wires passed out of the through holes are woven to form a net framework structure.

[0017] According to some embodiments of the present application, a plurality of the through holes are circumferentially distributed on the side wall of the connector.

[0018] According to some embodiments of the present application, a plurality of the through holes are vertically or obliquely arranged on the end face of the connector.

[0019] According to some embodiments of the present application, in the forming step, the connector comprises a tooth buckle part and a fixing part, the proximal end of the main frame body is provided with a plurality of closed loop structures, and a gap for accommodating the closed loop structures is formed between the tooth buckle part and the fixing part.

[0020] According to some embodiments of the present application, in the forming step, the main frame body is formed by cutting, and the specific steps are as follows:

[0021] S1, cutting or carving the raw material according to a predetermined pattern;

[0022] S2, removing the waste material after cutting or carving to form a cutting body or carving body with a plurality of columns;

[0023] S3, the cutting body or the carving body is loaded into a prefabricated mold, the cutting body or the carving body is stretched or pressed to form a mesh skeleton structure with one end open loop and the other end closed loop;

[0024] S4, the cutting body or the carving body of the mesh skeleton structure is heat set to form the main frame body;

[0025] S5, the open loop structure of the main frame body is gathered into the gathering part, and the closed loop structure is connected by the tooth buckle part and the fixed part.

[0026] According to some embodiments of the present application, the tooth buckle part is provided as a curved tooth, and the fixed part is provided as a stepped surface, and the gap is formed between the curved tooth and the stepped surface.

[0027] According to some embodiments of the present application, the welding step is further provided with a carving step after the welding step:

[0028] Carving, a scale value is carved on the handle of the control assembly, which is used to confirm the deformation amount of the main frame body.

[0029] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0030] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0031] Figure 1 The structure diagram of the stent of the first embodiment of the present application is shown;

[0032] Figure 2 The structure diagram of the stent of the second embodiment of the present application is shown; Figure 1 The enlarged schematic diagram of the stent of the first embodiment is shown;

[0033] Figure 3 The sectional view schematic diagram of the connecting part of the first embodiment is shown; Figure 1 The sectional view schematic diagram of the connecting part of the second embodiment is shown;

[0034] Figure 4 The structure diagram of the stent of the second embodiment of the present application is shown;

[0035] Figure 5 The structure diagram of the stent of the second embodiment of the present application is shown; Figure 4 The enlarged schematic diagram of the stent of the second embodiment is shown;

[0036] Figure 6 The sectional view schematic diagram of the connecting part of the second embodiment is shown; Figure 4 The sectional view schematic diagram of the connecting part of the second embodiment is shown;

[0037] Figure 7 Structure diagram of the connecting piece of the third embodiment of the present application;

[0038] Figure 8 Structure diagram of the connecting piece of the fourth embodiment of the present application.

[0039] Main frame body 100, closed loop structure 110;

[0040] Regulation assembly 200, control knob 210, handle 220, scale value 221, connecting piece 230, through hole 231, tooth buckle part 232, fixing part 233;

[0041] Lead screw 300, converging piece 310. DETAILED DESCRIPTION

[0042] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar notations represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary, only for explaining the present application, and cannot be understood as a limitation of the present application.

[0043] In the description of the present application, it is understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0044] In the description of the present application, the meaning of several is one or more, and the meaning of multiple is several or more, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If the first, second is described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0045] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0046] Referring to Figures 1 to 3 , the manufacturing method of a support according to an embodiment of the present application comprises the following steps:

[0047] Molding, making one end of the main frame body 100 into a closed loop structure 110, threading the closed loop structure 110 to the connecting piece 230, and bundling the other end of the main frame body 100 into the bundling piece 310 at the distal end of the lead screw 300, and then performing heat setting treatment;

[0048] Assembly, installing the control knob 210 to the control assembly 200, connecting the proximal end of the lead screw 300 to the control knob 210, so that the control knob 210 can push / pull the lead screw 300;

[0049] Welding, welding the connecting piece 230 to the control assembly 200.

[0050] The main frame body 100 is provided as a mesh skeleton structure, as shown in Figure 1 When the control knob 210 pushes the lead screw 300 upward, the lead screw 300 moves upward, the distal end of the lead screw 300 pulls the distal end of the main frame body 100 to move upward, drives the body of the main frame body 100 to shrink in the direction of the lead screw 300, and drives the control knob 210 downward, then the lead screw 300 moves downward, the body of the main frame body 100 enlarges in the direction away from the lead screw 300, so that the shape and size of the main frame body 100 can be changed, so as to adapt to different sizes of blood vessels for thrombectomy.

[0051] According to the embodiment of the present application, the method for making a stent has at least the following beneficial effects: the distal end of the mesh skeleton main frame body 100 is bundled in the bundling piece 310 of the lead screw 300, the proximal end of the closed loop structure 110 is threaded on the connecting piece 230 for heat setting treatment, the other end of the lead screw 300 is connected to the control knob 210 of the control assembly 200, the connecting piece 230 is welded with the control assembly 200, the lead screw 300 is pushed and pulled by operating the control knob 230, the distal end of the main frame body 100 is moved by the lead screw 300, so that the main frame body 100 is scaled to adapt to different sizes of blood vessels, and the universality is strong, without changing different stents, time and labor are saved.

[0052] According to some embodiments of the present application, in the molding step, referring to Figure 2 , Figure 3 and Figure 6 , a plurality of through holes 231 are formed on the connecting piece 230, and the proximal end of the main frame body 100 has a plurality of closed loop structures 110, wherein, as shown in Figure 2 and Figure 3 , the two ends of each closed loop structure 110 are threaded through two through holes 231 respectively, and the two bundled wires after threading through the two through holes 231 are woven into the structure of the main frame body 100; or as shown in Figure 6As shown, each closed loop structure 110 is individually distributed in each through hole 231, and the closed loop structure 110 is thus arranged, so that the operation of collecting the main frame body 100 at the connecting piece 230 or the operation of welding the connecting piece can be omitted, time and labor are saved, production is facilitated, and meanwhile, the closed loop structure 110 can be slightly moved in the through hole 231, so that the flexibility of the main frame body 100 during the zooming operation is facilitated.

[0053] According to some embodiments of the present application, in the forming step, as shown in Figures 1 to 3 , the main frame body 100 is arranged as a woven net framework structure, wherein two ends of each closed loop structure 110 are respectively arranged through two through holes 231, and the specific weaving steps of the main frame body 100 are as follows:

[0054] S1, one or more wire materials are arranged through the through holes 231 of the connecting piece 230 and are arranged out of the other through hole 231, so as to form the closed loop structure 110;

[0055] S2, the wire material arranged out of the through hole 231 is woven, so as to form the net framework structure.

[0056] According to some embodiments of the present application, in the forming step, as shown in Figure 6 , the main frame body 100 is arranged as a woven net framework structure, and each closed loop structure 110 is individually distributed in each through hole 231, and the specific weaving steps of the main frame body 100 are as follows:

[0057] S1, one or more wire materials are arranged through the through holes 231 of the connecting piece 230, so as to form the closed loop structure 110;

[0058] S2, the wire material arranged out of the through hole 231 is woven, so as to form the net framework structure.

[0059] The above are two different weaving methods, and the corresponding weaving method can be adopted according to the actual production situation.

[0060] In the above embodiments, referring to Figure 2 and Figure 3 , the through holes 231 are evenly distributed on the side wall of the connecting piece 230 along the circumference of the connecting piece 230; or referring to Figure 7 and Figure 8 , the through holes 231 are evenly distributed along the end surface of the connecting piece 230, and the through holes 231 are arranged as vertical or inclined through holes.

[0061] According to some embodiments of the present application, in the forming step, referring to Figure 4 and Figure 5The connecting piece 230 comprises a toothed buckle part 232 and a fixing part 233, the proximal end of the main frame body 100 is provided with a plurality of closed loop structures 110, and the toothed buckle part 232 and the fixing part 233 form a gap after cooperation, the size of the gap is matched with the size of the closed loop structure 110, that is, the closed loop structure 110 is clamped in the gap after the cooperation of the toothed buckle part 232 and the fixing part 233, so that the closed loop structure 110 is clamped and connected, the operation of collecting the main frame body 100 at the connecting piece 230 or the operation of welding connection can be omitted, time and labor are saved, and production is facilitated. Meanwhile, the closed loop structure 110 can be slightly moved in the gap, and the flexibility of the main frame body 100 during the zooming operation is facilitated.

[0062] According to some embodiments of the present application, in the forming step, the main frame body 100 is a cut-formed mesh skeleton structure, and the specific steps are as follows:

[0063] S1, cutting or carving the raw material according to a preset pattern;

[0064] S2, taking out the cut or carved waste to form a cut body or carved body with a plurality of columns;

[0065] S3, loading the cut body or carved body into a prefabricated mold, and expanding or extruding the cut body or carved body to form a mesh skeleton structure with an open loop at one end and a closed loop at the other end;

[0066] S4, heat setting the cut body or carved body of the mesh skeleton structure to form the main frame body 100;

[0067] S5, collecting the open loop structure of the main frame body 100 into the collecting piece 310, and clamping and connecting the closed loop structure 110 through the toothed buckle part 232 and the fixing part 233.

[0068] This kind of manufacturing method does not need to be woven, first the main frame body 100 is formed, and the closed loop structure 110 is clamped and connected through the toothed buckle part 232 and the fixing part 233 of the connecting piece 230, wherein the preset pattern refers to the size, gap and other structures of the preset unit mesh.

[0069] In the above embodiments, referring to Figure 4 and Figure 5 , the toothed buckle part 232 is provided as a bent tooth, and the fixing part 233 is provided as a stepped surface, and a gap is formed between the bent tooth and the stepped surface for clamping and connecting the closed loop structure 110, and the stepped surface can further prevent the closed loop structure 110 from being pulled out of the connecting piece 230.

[0070] According to some embodiments of the present application, referring to Figure 1 , a carving step is further arranged after the welding step:

[0071] The scale value 221 is engraved on the handle 220 of the regulating assembly 200, and is used to confirm the deformation amount of the main frame body 100.

[0072] In the above embodiment, with reference to Figure 1 The scale value 221 is arranged on the side wall of the handle 220, and is distributed along the axial direction of the handle. Each scale value 221 represents the deformation amount of the main frame body 100, so that the volume of the main frame body 100 at different scales can be clearly known, and the operator can conveniently perform the scaling operation on the main frame body 100 according to different blood vessel sizes.

[0073] The above embodiment of the present application is described in detail in combination with the drawings, but the present application is not limited to the above embodiment. Within the knowledge range possessed by those skilled in the art, various changes can be made without departing from the purpose of the present application.

Claims

1. A method for manufacturing a support, characterized in that, Includes the following steps: The main frame is formed into a closed loop structure at one end, which is then inserted into the connector. The other end of the main frame is then gathered into the gathering part at the far end of the lead screw, and then heat-set. Assembly: Install the control knob onto the control assembly, connect the proximal end of the lead screw to the control knob, so that the control knob can push / pull the lead screw; Welding, wherein the connector is welded to the control assembly; In the molding step, the connector includes a toothed part and a fixing part, and a plurality of closed-loop structures are provided at the near end of the main frame. A gap is formed between the toothed part and the fixing part to accommodate the closed-loop structures. The toothed part is configured as a curved tooth, the fixing part is configured as a stepped surface, and the gap is formed between the curved tooth and the stepped surface.

2. The method for manufacturing a support according to claim 1, characterized in that, In the forming step, the main frame is formed by cutting, and the specific steps are as follows: S1. Cut or carve the raw material according to the preset pattern; S2. Remove the waste material after cutting or carving to form a cut or carved body with multiple rods; S3. The cutting body or the carving body is loaded into the pre-made mold, and the cutting body or the carving body is stretched or squeezed to form a mesh skeleton structure with one end open and the other end closed. S4. Heat-set the cut or carved body of the grid-like skeleton structure to form the main frame; S5. The open-loop structure of the main frame is gathered into the gathering member, and the closed-loop structure is engaged and connected by the toothed part and the fixing part.

3. A method for manufacturing a support according to claim 1 or 2, characterized in that, An engraving step is provided after the welding step: Engraving: Engraving scale values ​​on the handle of the control component to confirm the deformation of the main frame.

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