Self-adaptive embolism spring ring and spring ring manufacturing method

Abstract

The invention provides a self-adaptive embolism spring ring and a spring ring manufacturing method, and relates to the technical field of medical instruments.The self-adaptive embolism spring ring comprises a spring ring body formed by winding alloy wires, the spring ring body extends along a preset path, and the preset path comprises waveform lines; the spring ring body extends along the wave-shaped line to form the wave-shaped part, the position of the wave-shaped line can be designed according to the blood vessel position and shape of a patient, the formed wave-shaped part reduces the structural hardness of the embolism spring ring, the adaptability of the embolism spring ring to the blood vessel is improved, higher packing density can be achieved, and the embolism effect is improved. In addition, the spring ring manufacturing method can achieve efficient forming machining of the self-adaptive embolism spring ring, the spring ring formed through machining is higher in structural flexibility and can adapt to a wider blood vessel range, and the embolism effect under different blood vessel conditions is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an adaptive embolization spring coil and a spring coil manufacturing method. Background Art

[0002] The embolic coil is an embolic device made of metal alloys that can be implanted in the body through a catheter to effectively block blood vessels and promote thrombosis. However, although the embolic coil is designed to achieve a lasting occlusion effect, the treatment effect of some patients is still unsatisfactory. Insufficient packing density will lead to the formation of a large number of thrombi in the embolic area, and over time, the dissolving effect of fibrin may cause thrombus dissolution, eventually leading to recanalization of the blood vessels. Therefore, increasing the packing density and reducing thrombosis are the keys to reducing the recanalization rate of blood vessels. However, the existing coils usually occupy a longer area in a loose manner in the blood vessels. Because the coils are restricted by the blood vessel wall, they cannot be fully expanded in the blood vessels and can only extend to both ends, forming many gaps. Therefore, how to increase the packing density of the embolic coil has become a technical problem that needs to be solved urgently. Summary of the invention

[0003] The purpose of the present invention is to provide an adaptive embolic spring coil and a spring coil manufacturing method to improve the adaptability of the spring coil to the blood vessel and solve the technical problem of low packing density of the embolic spring coil in the prior art.

[0004] In a first aspect, the adaptive embolic spring coil provided by the present invention comprises a spring coil body formed by winding an alloy wire, and the spring coil body extends along a preset path;

[0005] The preset path includes a wave line, and the spring coil body extends along the wave line to form a wave portion.

[0006] In combination with the first aspect, the present invention provides a first possible implementation manner of the first aspect, wherein the preset path includes a conical helix or a cylindrical helix;

[0007] A plurality of sections of the wavy lines are arranged at intervals along the conical spiral line or the cylindrical spiral line, and the plurality of sections of the wavy lines are all located on the conical surface where the conical spiral line is located or the cylindrical surface where the cylindrical spiral line is located.

[0008] In combination with the first possible implementation of the first aspect, the present invention provides a second possible implementation of the first aspect, wherein, on the unfolded surface of the conical surface where the conical spiral line is located or the unfolded surface of the cylindrical surface where the cylindrical spiral line is located, the waveform line includes: a first oblique line portion and a second oblique line portion, and the first oblique line portion is connected to the second oblique line portion to form an angle.

[0009] In combination with the second possible implementation of the first aspect, the present invention provides a third possible implementation of the first aspect, wherein the first oblique line portion and the second oblique line portion are equal in length.

[0010] In combination with the second possible implementation of the first aspect, the present invention provides a fourth possible implementation of the first aspect, wherein, on the unfolded surface of the conical surface where the conical spiral is located or the unfolded surface of the cylindrical surface where the cylindrical spiral is located, the angle between the first oblique line portion and the straight line where the unfolded conical spiral or the cylindrical spiral is located is 5° to 40°, and the angle between the second oblique line portion and the straight line where the unfolded conical spiral or the cylindrical spiral is located is 5° to 40°.

[0011] In combination with the first aspect, the present invention provides a fifth possible implementation manner of the first aspect, wherein the adaptive embolic spring coil further includes a memory alloy wire, and in a natural state, the memory alloy wire extends along the preset path;

[0012] The spring coil body is sleeved on the memory alloy wire.

[0013] In a second aspect, the spring coil manufacturing method provided by the present invention comprises the following steps: forming a spring coil secondary structure by winding an alloy wire; winding the spring coil secondary structure on a mold according to a preset path; heat treating the mold on which the spring coil secondary structure is wound, and demolding the spring coil secondary structure after it is cooled and shaped.

[0014] In a third aspect, the spring coil manufacturing method provided by the present invention comprises the following steps: forming a spring coil secondary structure by winding an alloy wire; winding the memory alloy wire on a mold according to a preset path; heat treating the mold on which the memory alloy wire is wound, and demolding the mold after the memory alloy wire is cooled and shaped; and sleeve the spring coil secondary structure on the memory alloy wire.

[0015] In combination with the above embodiment, the diameter of the alloy wire is 0.02 mm to 0.15 mm.

[0016] In combination with the above embodiment, the diameter of the memory alloy wire is 0.05 mm to 0.2 mm.

[0017] The embodiments of the present invention bring the following beneficial effects: an adaptive embolic spring coil includes a spring coil body formed by winding an alloy wire, the spring coil body extends along a preset path, the preset path includes a waveform line, the spring coil body extends along the waveform line to form a wavy portion, the position of the waveform line can be designed according to the location and shape of the patient's blood vessels, the formed wavy portion reduces the structural hardness of the embolic spring coil, improves the adaptability of the embolic spring coil to the blood vessels, can achieve a greater filling density, and improves the embolic effect.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related technologies, the drawings required for use in the specific embodiments or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of an adaptive embolic spring coil and a mold provided by an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of an adaptive embolic coil provided by an embodiment of the present invention;

[0022] Figure 3 A partial schematic diagram of a preset path composed of a conical spiral line and a wavy line in an adaptive embolic spring coil provided in an embodiment of the present invention;

[0023] Figure 4 A schematic diagram of another adaptive embolic coil provided by an embodiment of the present invention;

[0024] Figure 5 A partial schematic diagram of a preset path composed of a cylindrical spiral line and a wavy line in an adaptive embolic spring coil provided in an embodiment of the present invention;

[0025] Figure 6 A schematic diagram of a mold wound with a memory alloy wire in a spring coil manufacturing method provided in an embodiment of the present invention.

[0026] Icons: 100 - spring coil body; 200 - wave line; 201 - first oblique line portion; 202 - second oblique line portion; 300 - conical helix; 400 - cylindrical helix; 500 - mold; 501 - limit column. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Physical quantities in formulas, if not separately marked, should be understood as basic quantities of the base units of the International System of Units, or derived quantities derived from the basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] like Figure 1 As shown, the adaptive embolic spring coil provided in the embodiment of the present invention includes a spring coil body 100 formed by winding an alloy wire, and the spring coil body 100 extends along a preset path; the preset path includes a waveform line 200, and the spring coil body 100 extends along the waveform line 200 to form a wave portion 101.

[0031] Among them, the alloy wire is used as the primary structure, and the spring coil body 100 formed by winding with a spring winding machine can be used as the secondary structure, and the secondary structure extends along the preset path and is processed by a specific process to form an adaptive embolic spring coil as the tertiary structure. Under the condition that the preset path has a waveform line 200, the final formed adaptive embolic spring coil has a wave portion 101, and the wave portion 101 can be bent and compressed along the preset path, further reducing the hardness of the tertiary structure, thereby improving its ability to adapt to blood vessels and achieving a higher density of packing.

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, in the embodiment of the present invention, the preset path includes a conical spiral line 300 or a cylindrical spiral line 400; multiple sections of wavy lines 200 are arranged at intervals along the conical spiral line 300 or the cylindrical spiral line 400, and the multiple sections of wavy lines 200 are all located on the conical surface where the conical spiral line 300 is located or the cylindrical surface where the cylindrical spiral line 400 is located. The coil body 100 extends along the wavy line 200 to form a wavy portion 101, thereby, the wavy portion 101 extends along the conical surface where the conical spiral line 300 is located or the cylindrical surface where the cylindrical spiral line 400 is located, which can prevent the adaptive embolization coil from partially bulging outward, thereby adapting to the inner wall of the blood vessel.

[0033] like Figure 3 and Figure 5 As shown, on the unfolded surface of the conical surface where the conical helix 300 is located or the unfolded surface of the cylindrical surface where the cylindrical helix 400 is located, the waveform line 200 includes: a first oblique line portion 201 and a second oblique line portion 202, and the first oblique line portion 201 and the second oblique line portion 202 are connected to form an angle.

[0034] The conical helix 300 or the cylindrical helix 400 is provided with interval segments distributed at intervals, and the wave-shaped line 200 is connected to the interval segments, thereby forming a continuous preset path.

[0035] In an optional embodiment, the first oblique line portion 201 and the second oblique line portion 202 are of equal length, which is not only easy to process and position, but also allows the tertiary structure to have better deformation performance, thereby improving the adaptability of the adaptive embolic coil to the blood vessel.

[0036] Furthermore, on the unfolded surface of the conical surface where the conical helix 300 is located or the unfolded surface of the cylindrical surface where the cylindrical helix 400 is located, the angle between the first oblique portion 201 and the straight line where the unfolded conical helix 300 or cylindrical helix 400 is located is 5° to 40°, and the angle between the second oblique portion 202 and the straight line where the unfolded conical helix 300 or cylindrical helix 400 is located is 5° to 40°.

[0037] In actual use, the inclination angles of the first oblique portion 201 and the second oblique portion 202 can be selected according to factors such as the diameter, curvature, and required filling density of the target blood vessel, thereby improving the flexibility of structural selection and facilitating improving the adaptability of the adaptive embolization coil to different blood vessels.

[0038] In an optional embodiment, the adaptive embolic spring coil also includes a memory alloy wire, which extends along a preset path in a natural state; the spring coil body 100 is sleeved on the memory alloy wire, and the memory alloy wire is extended and shaped along the preset path, thereby eliminating the shaping process of the tertiary structure of the embolic spring coil, which is beneficial to improving processing efficiency and ensuring the stability of the shape of the tertiary structure.

[0039] In an optional embodiment, the spring coil manufacturing method includes the following steps: forming a spring coil secondary structure by winding an alloy wire; winding the spring coil secondary structure on a mold 500 according to a preset path; heat treating the mold 500 on which the spring coil secondary structure is wound, and demolding the spring coil secondary structure after it is cooled and shaped, thereby forming the adaptive embolic spring coil described in the above embodiment.

[0040] In another optional embodiment, the spring coil manufacturing method includes the following steps: forming a spring coil secondary structure by winding an alloy wire; winding the memory alloy wire on a mold 500 according to a preset path; heat treating the mold 500 wound with the memory alloy wire, and demolding the mold after the memory alloy wire is cooled and shaped; and sleeve the spring coil secondary structure on the memory alloy wire, thereby forming an adaptive embolic spring coil with a memory alloy wire.

[0041] In the spring coil manufacturing method, the diameter of the alloy wire can be selected from 0.02mm to 0.15mm, and the diameter of the memory alloy wire can be selected from 0.05mm to 0.2mm. Adjacent wave structures are spaced 10mm to 50mm along a preset path. Figure 1 and Figure 6 The mold 500 can be a cone, a sphere, or a cylinder with a diameter of 3mm to 30mm. In order to limit the waveform line 200, a plurality of limiting columns 501 can be installed on the surface of the mold 500 by threaded fitting or snap connection. The diameter of the limiting columns 501 is set to 0.5mm to 3mm, and the distance between adjacent limiting columns is 2mm to 20mm. The plurality of limiting columns 501 abut against the spring coil body 100 or the memory alloy wire, and the waveform line 200 can be prevented from being excessively bent. In addition, the limiting columns 501 can be increased or decreased as needed to adjust the position and density of the waveform line 200.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An adaptive embolic coil, characterized in that: The adaptive embolic spring coil comprises a spring coil body (100) formed by winding an alloy wire, and the spring coil body (100) extends along a preset path; The preset path comprises a wave line (200), and the spring coil body (100) extends along the wave line (200) to form a wave portion (101).

2. The adaptive embolic coil according to claim 1, characterized in that: The preset path includes a conical helical line (300) or a cylindrical helical line (400); A plurality of sections of the wavy lines (200) are arranged at intervals along the conical spiral line (300) or the cylindrical spiral line (400), and the plurality of sections of the wavy lines (200) are all located on the conical surface where the conical spiral line (300) is located or the cylindrical surface where the cylindrical spiral line (400) is located.

3. The adaptive embolic coil according to claim 2, characterized in that: On the unfolded surface of the conical surface where the conical helix (300) is located or on the unfolded surface of the cylindrical surface where the cylindrical helix (400) is located, the corrugated line (200) comprises: a first oblique line portion (201) and a second oblique line portion (202), wherein the first oblique line portion (201) and the second oblique line portion (202) are connected to form an angle.

4. The adaptive embolic coil according to claim 3, characterized in that: The first oblique line portion (201) and the second oblique line portion (202) are of equal length.

5. The adaptive embolic coil according to claim 3, characterized in that: On the unfolded surface of the conical surface where the conical helix (300) is located or the unfolded surface of the cylindrical surface where the cylindrical helix (400) is located, the angle between the first oblique line portion (201) and the straight line where the unfolded conical helix (300) or the cylindrical helix (400) is located is 5° to 40°, and the angle between the second oblique line portion (202) and the straight line where the unfolded conical helix (300) or the cylindrical helix (400) is located is 5° to 40°.

6. The adaptive embolic coil according to any one of claims 1 to 5, characterized in that: The adaptive embolic spring coil further comprises a memory alloy wire, which extends along the preset path in a natural state; The spring coil body (100) is sleeved on the memory alloy wire.

7. A method for manufacturing a spring coil, characterized in that: The following steps are involved: A secondary structure of a spring coil formed by winding the alloy wire; Winding the spring coil secondary structure on a mold (500) according to a preset path; The mold (500) around which the spring coil secondary structure is wound is subjected to heat treatment, and the spring coil secondary structure is demoulded after being cooled and shaped.

8. A method for manufacturing a spring coil, characterized in that: The following steps are involved: A secondary structure of a spring coil formed by winding the alloy wire; Winding the memory alloy wire on the mold (500) according to a preset path; heat treating the mold (500) around which the memory alloy wire is wound, and demoulding the mold after the memory alloy wire is cooled and shaped; The spring coil secondary structure is sleeved on the memory alloy wire.

9. The method for manufacturing a spring coil according to claim 8, characterized in that: The diameter of the alloy wire is 0.02 mm to 0.15 mm.

10. The method for manufacturing a spring coil according to claim 8, characterized in that: The diameter of the memory alloy wire is 0.05 mm to 0.2 mm.

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