Micro guide wire

Abstract

The utility model discloses a micro guide wire, which relates to the technical field of instruments for interventional diagnosis and treatment and comprises a far-end component and a near-end component. The far-end component is arranged at the far end of the near-end component; the far-end part comprises an outer-layer spring, an inner-layer twisted wire and a developing wire; the developing wire and the inner-layer twisted wire are sequentially wound around the far end of the near-end component, and the developing wire is located on the side, close to the far end of the near-end component, of the inner-layer twisted wire. One end of the developing wire is connected with the far end of the near-end component, and the other end of the developing wire is connected with one end of the inner-layer twisted wire and the near-end component; the other end of the inner-layer twisted wire is connected with the near-end component; and one end of the outer-layer spring is connected with the far-end end part of the near-end part, and the other end of the outer-layer spring is connected with the outer wall of the near-end part. The far end is wound by a double-layer spring, the flexibility and the plasticity are both considered, the twisting control performance of the micro guide wire is guaranteed, the passing ability of the micro guide wire in a tortuous blood vessel is improved, the near end is made of stainless steel, and it is guaranteed that the whole micro guide wire has good supporting force and pushing performance.

Description

Technical Field

[0001] This utility model relates to the field of interventional diagnostic and treatment equipment technology, and in particular to a microguidewire. Background Technology

[0002] A microguidewire is an interventional diagnostic and therapeutic device inserted into a microcatheter to provide guidance and support. Its tip is relatively soft, facilitating selective entry into blood vessels; its tail is relatively rigid, providing excellent support.

[0003] Existing microguidewires are made of stainless steel, which has poor pushability and maneuverability, as well as poor head support, resulting in poor passage of the microguidewire in tortuous blood vessels and inconvenience in use. Therefore, there is an urgent need for a new type of microguidewire with better passage. Utility Model Content

[0004] To address the problems existing in the prior art, the purpose of this invention is to provide a microguidewire that ensures torsional control and improves its passage through tortuous blood vessels.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] This invention provides a microguidewire, comprising a distal component and a proximal component; the distal component is disposed on the distal end of the proximal component; the distal component includes an outer spring, an inner stranded wire, and a developing wire; the developing wire and the inner stranded wire are sequentially wound around the distal end of the proximal component, and the developing wire is located on the side of the inner stranded wire closer to the distal end of the proximal component; one end of the developing wire is connected to the distal end of the proximal component, and the other end of the developing wire is connected to one end of the inner stranded wire and the proximal component; the other end of the inner stranded wire is connected to the proximal component; the outer spring wraps around the developing wire and the inner stranded wire, one end of the outer spring is connected to the distal end of the proximal component, and the other end of the outer spring is connected to the outer wall of the proximal component.

[0007] Optionally, the outer spring is made of stainless steel wire.

[0008] Optionally, the two ends of the outer spring are respectively connected to the proximal component by welding or adhesive bonding.

[0009] Optionally, the inner strands may comprise multiple strands of stainless steel wire wound together.

[0010] Optionally, one end of the inner stranded wire is connected to the proximal component and the end of the inner stranded wire by welding or adhesive bonding, and the other end of the inner stranded wire is connected to the proximal component by welding or adhesive bonding.

[0011] Optionally, the developing wire comprises multiple strands of platinum-nickel wire wound together.

[0012] Optionally, one end of the developing wire is connected to the distal end of the proximal component by welding or adhesive bonding, and the other end of the developing wire is connected to the proximal component and the end of the inner strand by welding or adhesive bonding.

[0013] Optionally, the distal diameter of the proximal component is smaller, and the proximal diameter of the proximal component is larger.

[0014] Optionally, the proximal component includes a nickel-titanium segment and a stainless steel segment; the nickel-titanium segment is located at the distal end of the proximal component, and the stainless steel segment is located at the proximal end of the proximal component.

[0015] Optionally, the nickel-titanium segment and the stainless steel segment are welded together.

[0016] The present invention achieves the following technical advantages over the prior art:

[0017] The microguidewire of this invention features a double-layer spring winding at the distal end, which balances flexibility and shapeability, ensuring the torsional control of the microguidewire and improving its passage through tortuous blood vessels. The proximal end is made of stainless steel to ensure that the microguidewire as a whole has good support and pushability. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the microguidewire in this utility model;

[0020] Figure 2 This is a schematic diagram of the core wire in the microguidewire of this utility model;

[0021] Figure 3 This is a schematic diagram of the distal cross-sectional structure of the microguidewire in this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Distal component; 2. Proximal component;

[0024] 11. Outer spring; 12. Inner stranded wire; 13. Developing wire;

[0025] 21. Nickel-titanium segment; 22. Stainless steel segment. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] like Figures 1 to 3 As shown, this embodiment provides a microguidewire, including a distal component 1 and a proximal component 2. The distal component 1 is disposed on the distal end of the proximal component 2. The distal component 1 includes an outer spring 11, an inner stranded wire 12, and a developing wire 13. The developing wire 13 and the inner stranded wire 12 are sequentially wound around the distal end of the proximal component 2, and the developing wire 13 is located on the side of the inner stranded wire 12 closer to the distal end of the proximal component 2. One end of the developing wire 13 is connected to the distal end of the proximal component 2, and the other end of the developing wire 13 is connected to one end of the inner stranded wire 12 and the proximal component 2. The other end of the inner stranded wire 12 is connected to the proximal component 2. The outer spring 11 wraps around the developing wire 13 and the inner stranded wire 12, one end of the outer spring 11 is connected to the distal end of the proximal component 2, and the other end of the outer spring 11 is connected to the outer wall of the proximal component 2.

[0029] The distal component 1 adopts a double-layer spring winding structure composed of an outer spring 11 and an inner twisted wire 12. The double-layer spring winding structure can not only enhance the support force of the distal end of the microguidewire, but also make the distal end of the microguidewire easier to twist and bend when entering a tortuous blood vessel by rotating the outer spring 11 and the inner twisted wire 12 respectively, making the distal end of the microguidewire easier to deform with the blood vessel and improving the pushability of the distal end of the microguidewire.

[0030] like Figure 3 As shown, the developing wire 13 comprises six platinum-nickel wires wound together. One end of the developing wire 13 is connected to the distal end of the proximal component 2 at point A, and the other end of the developing wire 13 is connected to the end of the proximal component 2 and the inner strand 12 at point B.

[0031] The inner strand 12 comprises six strands of stainless steel wire wound together. One end of the inner strand 12 is connected to the proximal component 2 and the end of the inner strand 12 at point B, and the other end of the inner strand 12 is connected to the proximal component 2 at point C.

[0032] The outer spring 11 is made of stainless steel wire. The distal end of the outer spring 11 is connected to the end of the proximal component 2 at point A, and the proximal end of the outer spring 11 is connected to the end of the proximal component 2 at point D.

[0033] like Figure 2 As shown, the proximal component 2 includes a nickel-titanium segment 21 and a high-strength stainless steel segment 22. The nickel-titanium segment 21 is located at the distal end of the proximal component 2, enhancing the flexibility of the distal component 1 and facilitating the passage of tortuous blood vessels. The stainless steel segment 22 is located at the proximal end of the proximal component 2, providing strong support and facilitating pushing. The nickel-titanium segment 21 and the stainless steel segment 22 are welded together and formed into a gradient diameter through grinding, with a thinner diameter at the distal end and a thicker diameter at the proximal end, giving the proximal component 2 better overall support and pushing ability.

[0034] In a further specific embodiment, the distal component 1 is provided with a hydrophilic coating to ensure that the distal component 1 is more compatible with blood and improve the permeability of the distal component 1. The surface of the proximal component 2 is provided with a PTFE coating, which has less surface resistance and less pushing resistance.

[0035] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0036] This specification uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A micro-wire guide, characterized by, The application relates to a medical guide wire, which comprises a distal part and a proximal part; the distal part is arranged on the distal end of the proximal part; the distal part comprises an outer layer spring, an inner layer wire and a developing wire; the developing wire and the inner layer wire are wound on the distal end of the proximal part in sequence, and the developing wire is located on the side of the inner layer wire close to the distal end of the proximal part; one end of the developing wire is connected with the distal end of the proximal part, and the other end of the developing wire is connected with one end of the inner layer wire and the proximal part; the other end of the inner layer wire is connected with the proximal part; the outer layer spring wraps the developing wire and the inner layer wire, one end of the outer layer spring is connected with the distal end of the proximal part, and the other end of the outer layer spring is connected with the outer wall of the proximal part.

2. The micro-wire of claim 1, wherein, The outer layer spring is made of stainless steel wire.

3. The micro-wire of claim 1, wherein, The two ends of the outer layer spring are connected with the proximal part through fusion welding or glue bonding respectively.

4. The micro-wire guide of claim 1, wherein, The inner layer wire comprises a plurality of stainless steel wires wound together.

5. The micro-wire of claim 1, wherein, One end of the inner layer wire is connected with the proximal part and the end of the inner layer wire through fusion welding or glue bonding, and the other end of the inner layer wire is connected with the proximal part through fusion welding or glue bonding.

6. The micro-wire guide of claim 1, wherein, The developing wire comprises a plurality of platinum-nickel wires wound together.

7. The micro-wire of claim 1, wherein, One end of the developing wire is connected with the distal end of the proximal part through fusion welding or glue bonding, and the other end of the developing wire is connected with the proximal part and the end of the inner layer wire through fusion welding or glue bonding.

8. The micro-wire guide of claim 1, wherein, The distal end of the proximal part is thin in diameter, and the proximal end of the proximal part is thick in diameter.

9. The micro-wire of claim 1, wherein, The proximal part comprises a nickel-titanium section and a stainless steel section; the nickel-titanium section is located at the distal end of the proximal part, and the stainless steel section is located at the proximal end of the proximal part.

10. The micro-wire guide of claim 9, wherein, The nickel-titanium section and the stainless steel section are welded.

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