Anchoring guidewire and method of making

Abstract

The application provides an anchoring guide wire and a manufacturing method thereof. The anchoring guide wire comprises a guide wire body and a retractable support assembly. The distal end of the guide wire body is connected with the proximal end of the retractable support assembly. The retractable support assembly comprises at least one support structure. The support structure comprises at least one first support member in a lattice shape formed by stacking parallelograms and at least one second support member in a lattice shape formed by stacking triangles. The first support member and the second support member are connected with each other and closed in the circumferential direction. The support structures are connected with each other. The retractable support assembly is configured to be elastically deformed and radially self-adaptingly contracted when subjected to an action force in the radial direction. The anchoring guide wire provided by the application has the advantages that the retractable support assembly has good self-adapting deformation capability, the guide wire has small volume and good pushability after being contracted in the catheter, and is suitable for deep and narrow intracranial artery vessels.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an anchoring guidewire and its manufacturing method. Background Technology

[0002] In routine interventional procedures, clinicians change catheters based on the actual condition of the lesion area to achieve the best surgical outcome. However, when switching between catheters with different functions, due to the length limitation of the standard guidewire, clinicians must withdraw both the standard guidewire and the catheter simultaneously before inserting a catheter with a different function. This "withdrawal and re-insertion" process significantly increases the complexity and time of the procedure. To improve this problem, the invention of the exchange guidewire was developed. The exchange guidewire itself is longer than the standard guidewire. Therefore, clinicians can switch catheters without withdrawing the guidewire. While the design of the exchange guidewire greatly simplifies the switching process between catheters with different functions, it also introduces other unavoidable problems. During catheter switching using the exchange guidewire, the guidewire tip may shift due to catheter withdrawal, requiring clinicians to reposition the target location. In addition, the guidewire tip may also generate unnecessary vibrations due to catheter withdrawal, which can irritate blood vessels, cause damage, or even lead to more serious vascular perforation. Meanwhile, the entire catheter exchange process needs to be carried out steadily and slowly, which means that the actual operation time cannot be effectively reduced. Doctors and patients will be exposed to radiation for a long time, and the risk of adverse events still cannot be effectively reduced.

[0003] To address the tip displacement and vibration issues of exchange guidewires during use, existing technologies have proposed several approaches. These include anchoring guidewires using a spherical intravascular fixator, employing a metal braided mesh elastic ball for fixation within the blood vessel; anchoring guidewires using a front-end helical coil that conforms to the vessel wall; and anchoring guidewires with a variable-compliance tip made of deformable material for anchoring within the vessel. While these solutions utilize different tip expansion structures to address the tip displacement and vibration problems of exchange guidewires, they inevitably introduce another issue: the tip structure of these anchoring guidewires does not consider the contraction and subsequent delivery within the catheter. This results in poorer throughput compared to conventional exchange guidewires due to their larger size, making them unable to reach deeper, more tortuous blood vessels.

[0004] Therefore, how to provide an anchoring guide wire that ensures that the passing performance of the anchoring guide wire is not sacrificed while having an anchoring function has become one of the technical problems that urgently need to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide an anchoring guidewire and its manufacturing method to solve the problem of difficulty in delivery within the catheter during the exchange catheter process in the prior art.

[0006] To achieve the above objectives, the present invention provides an anchoring guide wire, comprising: a guide wire body and a retractable support assembly;

[0007] The distal end of the guidewire body is connected to the proximal end of the retractable support assembly;

[0008] The retractable support assembly includes at least one support structure, the support structure including at least one first support member and at least one second support member, the first support member and the second support member being connected to each other and closed in the circumferential direction;

[0009] The shape of the first support member includes a lattice shape formed by stacking a plurality of parallelograms, and the shape of the second support member includes a lattice shape formed by stacking a plurality of triangles;

[0010] The parallelograms are connected to adjacent parallelograms by sharing a side, and the triangles are connected to adjacent triangles by sharing a side.

[0011] The connection between the parallelogram and the adjacent triangle includes: the short hypotenuse of the parallelogram sharing a side with a single adjacent triangle, or the long hypotenuse of the parallelogram sharing a side with several adjacent triangles.

[0012] When the retractable support assembly has two or more support structures, the support structures are interconnected;

[0013] The retractable support assembly is configured to elastically deform and self-compliantly contract radially when subjected to a radially inward force.

[0014] Optionally, after the retractable support assembly is deployed axially, the state of the parallelogram includes: along the reference direction, the long hypotenuse of all the parallelograms tilts to the right or left, or the long hypotenuse of some of the parallelograms tilts to the left and the long hypotenuse of another part of the parallelograms tilts to the right.

[0015] The reference direction is from the far end to the near end of the retractable support assembly.

[0016] Optionally, the axial length of the parallelogram is 0.5mm-10mm, and the lateral length of the parallelogram is 0.25mm-0.5mm.

[0017] Optionally, each of the support structures includes m parallelograms and n triangles, wherein the ratio of m to n ranges from 0 to 2; the value of m+n ranges from 5 to 50; the number of support structures is 1 to 12; and m and n are natural numbers.

[0018] Optionally, the material of the retractable support component includes metal or polymer materials.

[0019] Optionally, the surface of the retractable support assembly may be smoothed by polishing, coating, grafting, or depositing.

[0020] Optionally, when the retractable support assembly is located within a blood vessel in the target region, the shape of the retractable support assembly within the blood vessel includes: columnar, lantern-shaped, umbrella-shaped, wheel-shaped, or cone-shaped.

[0021] Optionally, the maximum diameter of the retractable support assembly within the blood vessel is greater than or equal to the diameter of the inner wall of the blood vessel.

[0022] Optionally, it may also include at least two developing components, which are disposed on the retractable support assembly and used to display the position information of the retractable support assembly.

[0023] To achieve the above objectives, the present invention also provides a method for manufacturing an anchoring guide wire, used to manufacture the anchoring guide wire described in any of the above claims, wherein the steps of the manufacturing method are as follows:

[0024] The retractable support assembly is formed by stacking and weaving metal wires on a core according to a preset geometric pattern using a metal braiding machine.

[0025] The surface of the retractable support component is chemically polished to give it a smooth surface;

[0026] Take a metal wire as the main body of the guide wire and put it into a muffle furnace for heat treatment and shaping;

[0027] The distal end of the naturally cooled guidewire body is connected to the proximal end of the polished retractable support assembly.

[0028] Compared with the prior art, the anchoring guide wire and its manufacturing method provided by the present invention have the following beneficial effects:

[0029] This invention provides an anchoring guidewire, comprising: a guidewire body and a retractable support assembly; wherein the distal end of the guidewire body is connected to the proximal end of the retractable support assembly; the retractable support assembly includes at least one support structure, the support structure including at least one first support member and at least one second support member, the first support member and the second support member being interconnected and circumferentially closed; the shape of the first support member includes a lattice shape formed by stacking a plurality of parallelograms, and the shape of the second support member includes a lattice shape formed by stacking a plurality of triangles; wherein the parallelograms are connected to adjacent parallelograms by sharing a side, and the triangles are connected to adjacent triangles by sharing a side; the connection between the parallelograms and adjacent triangles includes: the short hypotenuse of the parallelogram being connected to a single adjacent triangle by sharing a side, or the long hypotenuse of the parallelogram being connected to several adjacent triangles by sharing a side. When the retractable support assembly has two or more support structures, the support structures are interconnected; the retractable support assembly is configured to elastically deform and self-compact radially contract when subjected to a radially inward force. The anchoring guidewire provided by this invention utilizes the retractable support component. When subjected to a radially inward force, the hypotenuse of the parallelogram can bend and extend, thereby dispersing the radial bending force experienced by the retractable support component in the contracted state. Simultaneously, it ensures that the retractable support component can contract in accordance with the direction of the radial force. When the anchoring guidewire is inserted into a catheter and transported to the lesion by the catheter, the catheter provides a radially inward force to the retractable support component, causing the retractable support component to shrink in volume after compliant contraction, facilitating the transport of the anchoring guidewire within the blood vessel. Furthermore, once the anchoring guidewire reaches the lesion, by pushing the retractable support component out of the catheter, the retractable support component gradually expands back to its natural state after being free from radial force from the catheter. When the retractable support component expands to contact the inner wall of the blood vessel, it is subjected to a radial force from the inner wall, thus adhering tightly to the inner wall. The triangular arrangement further assists in maintaining acceptable anchoring characteristics and radial support force even in the expanded state. Therefore, the anchoring guidewire is less prone to displacement and vibration during catheter exchange. Thus, the anchoring guidewire provided by this invention, by setting the first support member as a lattice shape formed by stacked parallelograms, allows the retractable support assembly to coil and extend using the hypotenuses of the parallelograms when subjected to radial force. This results in a small volume and good pushability after contraction within the catheter, making it suitable for deep penetration into tortuous and narrow intracranial arteries. Furthermore, after the retractable support assembly is pushed out of the catheter, its self-compliant expansion provides a certain degree of fixation.

[0030] Since the manufacturing method provided by this invention is used to manufacture the anchoring guide wire, the manufactured anchoring guide wire has at least the same technical effect, which will not be described in detail here. Attached Figure Description

[0031] Figure 1 This is a structural diagram of an anchoring guide wire provided in one embodiment of the present invention;

[0032] Figure 2 This is a structural diagram of a retractable support assembly after self-compliant contraction, provided in one embodiment of the present invention.

[0033] Figure 3 This is a structural diagram of a retractable support assembly after self-compliant expansion according to an embodiment of the present invention;

[0034] Figure 4 A planar unfolded schematic diagram of a support structure provided in one embodiment of the present invention. Figure I ;

[0035] Figure 5 A planar unfolded schematic diagram of a support structure provided in one embodiment of the present invention. Figure II ;

[0036] Figure 6 A planar unfolded schematic diagram of a support structure provided in one embodiment of the present invention. Figure III ;

[0037] Figure 7 A planar unfolded schematic diagram of a support structure provided in one embodiment of the present invention. Figure IV ;

[0038] Figure 8 A flowchart illustrating a method for manufacturing an anchoring guide wire according to an embodiment of the present invention;

[0039] The reference numerals in the attached figures are as follows:

[0040] 100-Guidewire body, 200-Retractable support assembly, 201-First support member, 202-Second support member, 203-Support structure, 300-Catheter, 400-Blood vessel. Detailed Implementation

[0041] The specific embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, used only to facilitate and clarify the illustration of the embodiments of the present invention. It should be understood that the accompanying drawings do not necessarily show the specific structure of the present invention to scale, and the illustrative features used to illustrate certain principles of the present invention in the accompanying drawings are also drawn in a slightly simplified manner. Specific design features of the present invention disclosed herein, including, for example, specific dimensions, orientations, positions, and shapes, will be determined in part by the specific application and usage environment. Furthermore, in the embodiments described below, the same reference numerals are sometimes used across different drawings to denote the same parts or parts having the same function, omitting repeated descriptions. In this specification, similar reference numerals and letters are used to denote similar items; therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0042] The core idea of ​​this invention is to provide an anchoring guidewire to solve the problem that the existing anchoring guidewire is not easy to deliver in the catheter.

[0043] To achieve the above-mentioned goals, the inventors of this invention, through extensive research and continuous practical application, discovered that solving the problem of guidewire delivery requires addressing the delivery of the expanded tip structure within the catheter after its contraction. Therefore, the inventors creatively proposed a stacked structure employing parallelograms and triangles to design a tip deformation structure with excellent deformability and flexibility. This allows the guidewire to be compact, highly maneuverable, and capable of penetrating deep into tortuous and narrow intracranial arteries while maintaining a certain level of guidewire fixation.

[0044] Example 1

[0045] This embodiment provides an anchoring guide wire; for details, please refer to the attached document. Figure 1 To be continued Figure 3 Figure 1 is a structural diagram of an anchoring guide wire provided in an embodiment of the present invention. Figure 2 This is a structural diagram of a retractable support assembly after self-compliant contraction, provided in one embodiment of the present invention. Figure 3 This is a structural diagram of a retractable support assembly after self-compliant expansion according to an embodiment of the present invention; combined with Figures 1 to 3It can be clearly seen that the anchoring guide wire includes: a guide wire body 100 and a retractable support assembly 200; wherein, the distal end of the guide wire body 100 is connected to the proximal end of the retractable support assembly 200; the retractable support assembly 200 includes at least one support structure 203, the support structure 203 includes at least one first support member 201 and at least one second support member 202; the first support member 201 and the second support member 202 are interconnected and closed circumferentially; the shape of the first support member 201 includes a lattice shape formed by stacking a plurality of parallelograms, and the shape of the second support member 202 includes a lattice shape formed by stacking a plurality of triangles; wherein, the parallelograms are connected to adjacent parallelograms by sharing an edge, and the triangles are connected to adjacent triangles by sharing an edge; the connection between the parallelogram and the adjacent triangle includes: the short hypotenuse of the parallelogram is connected to a single adjacent triangle by sharing an edge, or the long hypotenuse of the parallelogram is connected to several adjacent triangles by sharing an edge. When the retractable support assembly 200 has two or more support structures 203, the support structures 203 are interconnected; the retractable support assembly 200 is configured to produce elastic deformation and self-compliant contraction in the radial direction when subjected to a radially inward force.

[0046] With this configuration, the anchoring guidewire provided by the present invention utilizes the retractable support assembly 200, where the hypotenuse of the parallelogram can bend and extend when subjected to a radially inward force. This disperses the radial bending force experienced by the retractable support assembly in the contracted state, while simultaneously ensuring that the retractable support assembly can contract in accordance with the direction of the radial force. When the anchoring guidewire is placed in the catheter and transported to the lesion by the catheter, the catheter 300 provides a radially inward force to the retractable support assembly 200, thereby reducing the volume of the retractable support assembly 200 after self-contraction, facilitating the transport of the anchoring guidewire within the blood vessel 400. Simultaneously, once the anchoring guidewire reaches the lesion, the retractable support assembly 200 is pushed out of the catheter 300. After being deprived of radial force from the catheter 300, the retractable support assembly 200 gradually expands back to its natural state. When the retractable support assembly 200 expands to contact the inner wall of the blood vessel 400, it will be subjected to radial force from the inner wall of the blood vessel 400, thus adhering tightly to the inner wall. The triangular arrangement further assists in maintaining acceptable anchoring characteristics and radial support force even in the expanded state. Therefore, during catheter exchange, the anchoring guidewire is less prone to displacement and vibration. Therefore, the anchoring guidewire provided by the present invention sets the first support member 201 as a lattice shape formed by stacking a plurality of parallelograms, so that when the retractable support component is subjected to radial force, the inclined side of the parallelograms will be used to curl and extend it so that it has a small volume and good pushability after contracting within the catheter 300, thus making it suitable for deep penetration into the tortuous and narrow arteries 400 in the intracranial cavity. At the same time, when the retractable support component 200 is pushed out of the catheter 300, its self-compliant expansion also gives it a certain fixation function.

[0047] Please see the appendix Figure 4 , Figure 4 A planar unfolded schematic diagram of a support structure provided in one embodiment of the present invention. Figure IAs shown in the figure, the dimensions of the parallelogram are determined by the angle α, the height H, and the length L. In one preferred embodiment, α is the angle of the acute interior angle (or right angle) of the parallelogram, ranging from 0° to 90°; L is the axial length of the parallelogram, ranging from 0.5mm to 10mm; H is the lateral length of the parallelogram, ranging from 0.25mm to 5mm. The support structure 203 is composed of m parallelograms and n triangles, and the ratio of m to n ranges from 0 to 2; the value of m+n ranges from 5 to 50; and the number of support structures 203 ranges from 1 to 12. With this configuration, the anchoring guidewire provided by the present invention designs the retractable support component 200 as being composed of stacked parallelograms and triangles. By adjusting the ratio of parallelograms to triangles, the deformation capability and flexibility of the retractable support component 200 in the contracted state can be effectively improved. Simultaneously, the addition of triangular structures helps it maintain acceptable anchoring characteristics and radial support force in the expanded state. It should be further noted that the shape of the retractable support component 200 within the blood vessel 400 includes: columnar, lantern-shaped, umbrella-shaped, wheel-shaped, or conical.

[0048] Please see Figures 5-7 ,in, Figure 5 A planar unfolded schematic diagram of a support structure provided in one embodiment of the present invention. Figure II ; Figure 6 A planar unfolded schematic diagram of a support structure provided in one embodiment of the present invention. Figure III ; Figure 7 A planar unfolded schematic diagram of a support structure provided in one embodiment of the present invention. Figure IV ; combination Figures 5-7 It is evident that after the retractable support assembly 200 is axially deployed, the parallelograms exhibit the following states: along a reference direction, the long hypotenuses of all parallelograms tilt to the right or left, or the long hypotenuses of some parallelograms tilt to the left while the long hypotenuses of others tilt to the right; wherein the reference direction is from the distal end to the proximal end of the retractable support assembly 200. With this configuration, regardless of the direction in which the long hypotenuses of the parallelograms tilt, the retractable support assembly 200 can self-compliantly retract radially inward within the conduit 300.

[0049] Preferably, the material of the retractable support component 200 includes metal or polymer. In one preferred embodiment, the retractable support component 200 is made of nitinol. Thus, the metal or polymer material ensures that the retractable support component 200 can elastically deform and self-compact when subjected to radially inward forces, and self-compactly expand back to its natural state after the radial force is removed.

[0050] The surface of the retractable support assembly 200 is smoothed by polishing, coating, grafting, or deposition. This facilitates the insertion of the anchoring guidewire into the catheter 300 while preventing the retractable support assembly 200 from damaging the inner wall of the blood vessel 400 after entering the blood vessel 400.

[0051] Preferably, the maximum diameter of the retractable support component 200 within the blood vessel 400 is greater than or equal to the inner wall diameter of the blood vessel 400. Thus, when the retractable support component 200 is extended from the catheter 300, it self-adaptively expands to follow the dimensions of the inner wall of the blood vessel 400 until it contacts the inner wall. Under the radial force exerted by the inner wall, it adheres tightly to the inner wall, thereby ensuring that the anchoring guidewire is less prone to displacement and vibration during catheter exchange. It should be further noted that when the retractable support component 200 is in the contracted state, the ratio of its diameter to the diameter of the guidewire body 100 is between 1 and 10, and in one preferred embodiment, the ratio is between 1.2 and 5.

[0052] Preferably, the system further includes at least two imaging components, which are disposed on the retractable support assembly 200 and used to display the position information of the retractable support assembly 200. This allows the operator to determine the position of the retractable support assembly 200 within the blood vessel 400 using the imaging components. The imaging components may be made of platinum-iridium alloy, platinum-tungsten alloy, or platinum-rhodium alloy. The imaging components may be connected by methods such as heat fusion pressing, welding, or winding.

[0053] Example 2

[0054] The present invention also provides a method for manufacturing an anchoring guide wire, comprising manufacturing the anchoring guide wire described in any of the above embodiments, wherein the specific manufacturing steps are as follows:

[0055] The retractable support assembly 200 is formed by stacking and weaving metal wires on a shaft core according to a preset geometric pattern using a metal braiding machine.

[0056] The surface of the retractable support assembly 200 is chemically polished to give it a smooth surface;

[0057] Take a metal wire as the guide wire body 100 and put it into a muffle furnace for heat treatment and shaping;

[0058] The distal end of the naturally cooled guide wire body 100 is connected to the proximal end of the polished retractable support assembly 200.

[0059] Since the manufacturing method provided by this invention is used to manufacture the anchoring guide wire, the manufactured anchoring guide wire has at least the same technical effect, which will not be described in detail here.

[0060] In one preferred embodiment, 0.1 mm diameter nitinol wire is used as the raw material for the retractable support assembly 200, and it is woven into a pre-designed geometric pattern on the core using a metal braiding machine. The nitinol wires stacked in the pre-designed geometric pattern have an inclination angle α of 35°, and each intersection of the support structure 203 is connected to the adjacent support structure 203, thus forming a "circumferentially closed support structure 203". The geometric pattern stacking adopts a parallelogram configuration with the long hypotenuse tilted to the left. The proximal nitinol wires of the retractable support assembly 200 are tightened and concentrated along the core, and the developing component is loaded onto the retractable support assembly 200. Then, it is placed in a muffle furnace for heat treatment and shaping, followed by natural cooling. Next, the retractable support assembly 200 is chemically polished in a polishing solution and cleaned for later use. Subsequently, a 0.2 mm diameter nitinol wire is taken as the guide wire body 100 and placed in a muffle furnace for heat treatment and shaping. After natural cooling, it is welded to the polished retractable support assembly 200 by hot melting. Finally, a Pebax tube with an inner diameter of 0.4 mm is inserted from the distal end of the retractable support assembly 200 until the distal end of the retractable support assembly 200 reaches the other end of the Pebax tube.

[0061] In another preferred embodiment, the shrinkable support component 200 with shape memory function is prepared by first preparing a prepolymer. Dried polybutylene adipate (PBA) and polyether polytetrahydrofuran diol (PTMG) are added to a reaction vessel and stirred under nitrogen protection. At 70°C, treated diphenylmethane diisocyanate (MDI) and N,N-dimethylformamide (DMF) are slowly added dropwise using a constant-pressure dropping funnel for approximately 2 hours, with the temperature controlled at 60–70°C, to obtain a polyurethane prepolymer. Then, chain extension is performed. The mass of the chain extender is calculated based on the -NCO content, and treated 1,4-butanediol is added according to the calculated value. The mixture is stirred thoroughly, and the temperature is controlled at 70–80°C for 1.5–2 hours. After the reaction, it is injected into a pre-designed mold and placed in a 70°C forced-air oven to remove the solvent, resulting in the shrinkable support component 200 with shape memory function. Next, a 0.15mm long 316L stainless steel metal piece is used as the guide wire body 100. The guide wire body 100 is connected to the retractable support assembly 200 by soldering. Finally, the developing component is mounted on the retractable support assembly 200 to form the anchoring guide wire. Finally, a PET tube with an inner diameter of 0.4mm is taken and inserted from the distal end of the retractable support assembly 200 until the distal end of the retractable support assembly 200 reaches the other end of the PET tube.

[0062] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0063] In summary, the anchoring guidewire provided by this invention utilizes the retractable support assembly 200, where the hypotenuse of the parallelogram can bend and extend when subjected to a radially inward force. This disperses the radial bending force experienced by the retractable support assembly in its contracted state, while simultaneously ensuring that the retractable support assembly can contract in accordance with the direction of the radial force. When the anchoring guidewire is placed in a catheter and transported to the lesion site by the catheter, the catheter 300 provides a radially inward force to the retractable support assembly 200, thereby reducing the volume of the retractable support assembly 200 after self-contraction, facilitating the transport of the anchoring guidewire within the blood vessel 400. Simultaneously, once the anchoring guidewire reaches the lesion, the retractable support assembly 200 is pushed out of the catheter 300. After being deprived of radial force from the catheter 300, the retractable support assembly 200 gradually expands back to its natural state. When the retractable support assembly 200 expands to contact the inner wall of the blood vessel 400, it will be subjected to radial force from the inner wall of the blood vessel 400, thus adhering tightly to the inner wall. With the aid of the triangular arrangement, it maintains acceptable anchoring characteristics and radial support force even in its expanded state. Therefore, during catheter exchange, the anchoring guidewire is less prone to displacement and vibration. Therefore, the anchoring guidewire provided by the present invention sets the first support member 201 as a lattice shape formed by stacking a plurality of parallelograms, so that when the retractable support component is subjected to radial force, the inclined side of the parallelograms will be used to curl and extend it so that it has a small volume and good pushability after contracting within the catheter 300, thus making it suitable for deep penetration into the tortuous and narrow arteries 400 in the intracranial cavity. At the same time, when the retractable support component 200 is pushed out of the catheter 300, its self-compliant expansion also gives it a certain fixation function.

[0064] Since the manufacturing method provided by this invention is used to manufacture the anchoring guide wire, the manufactured anchoring guide wire has at least the same technical effect, which will not be described in detail here.

[0065] The above are merely preferred embodiments of the present invention and do not constitute any limitation on the present invention. Any equivalent substitutions or modifications made by those skilled in the art to the technical solutions and content disclosed in the present invention without departing from the scope of the present invention shall be deemed to have remained within the protection scope of the present invention.

Claims

1. An anchoring guide wire, characterized in that, include: Guidewire body and retractable support assembly; The distal end of the guidewire body is connected to the proximal end of the retractable support assembly; The retractable support assembly includes at least one support structure, the support structure including at least one first support member and at least one second support member, the first support member and the second support member being connected to each other and closed in the circumferential direction; The first support member has a shape comprising a lattice formed by stacking a plurality of parallelograms, wherein the parallelograms have long sides and short sides; the second support member has a shape comprising a lattice formed by stacking a plurality of triangles. The parallelograms are connected to adjacent parallelograms by sharing a side, and the triangles are connected to adjacent triangles by sharing a side. The connection between the parallelogram and the adjacent triangle includes: the short hypotenuse of the parallelogram sharing a side with a single adjacent triangle, or the long hypotenuse of the parallelogram sharing a side with several adjacent triangles. When the retractable support assembly has two or more support structures, the support structures are interconnected; The retractable support assembly is configured to elastically deform and self-compliantly contract radially when subjected to a radially inward force. After the retractable support assembly is extended axially, the state of the parallelogram includes: along a reference direction, the long hypotenuse of all the parallelograms is inclined, and the reference direction is the direction from the far end to the near end of the retractable support assembly. After the retractable support assembly is extended axially, the state of the parallelogram includes: along the reference direction, the long hypotenuse of all the parallelograms tilts to the right or left, or the long hypotenuse of some of the parallelograms tilts to the left and the long hypotenuse of another part of the parallelograms tilts to the right. Each of the aforementioned support structures comprises m parallelograms and n triangles, and the number of the support structures is 1-12.

2. The anchoring guide wire as described in claim 1, characterized in that, The axial length of the parallelogram is 0.5mm-10mm, and the lateral length of the parallelogram is 0.25mm-0.5mm.

3. The anchoring guide wire as described in claim 1, characterized in that, The materials of the retractable support component include: metal or polymer materials.

4. An anchoring guide wire as described in claim 1, characterized in that, The surface of the retractable support component is formed into a smooth surface through polishing, coating, grafting, or deposition.

5. An anchoring guide wire as described in claim 1, characterized in that, When the retractable support assembly is located within a blood vessel in the target area, the shape of the retractable support assembly within the blood vessel includes: columnar, lantern-shaped, umbrella-shaped, wheel-shaped, or cone-shaped.

6. An anchoring guide wire as described in claim 5, characterized in that, The maximum diameter of the retractable support assembly within the blood vessel is greater than or equal to the diameter of the inner wall of the blood vessel.

7. An anchoring guide wire as described in claim 1, characterized in that, It also includes at least two developing components, which are disposed on the retractable support assembly and used to display the position information of the retractable support assembly.

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