Hard guide wire with flexibly bent head section

Abstract

The utility model provides a hard guide wire with a flexibly bent head section, which comprises a shell and a core wire, an accommodating cavity is arranged in the shell, the core wire is arranged in the accommodating cavity, the shell comprises a hard tube and a winding wire, the core wire comprises a tail section and a head section, the hardness of the head section is smaller than that of the tail section, and the winding wire is arranged in the accommodating cavity. The diameter of the section of the head section is gradually reduced in the direction away from the tail section. According to the hard guide wire with the flexibly bent head section, the head section of the core wire of the hard guide wire forms the flexible section, and the flexible section penetrates into the winding wire to be fixed, so that the whole supporting performance of a hard guide wire product is kept, and meanwhile, the blood vessel wall is better protected through the flexible section and the bent design of the head end; and the perfect balance of rigidity and vascular injury prevention is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to a hard guide wire with a flexible bent head section. Background Art

[0002] A guide wire is an important auxiliary device for guiding a catheter into a blood vessel and performing selective or super-selective intubation. Guide wires are divided into soft guide wires and hard guide wires. The overall hardness of a soft guide wire is relatively soft, and it can only play a role in guiding and cooperating with the catheter during the operation, but it does not have the function of force support. The overall hardness of a hard guide wire is relatively large and can play a supporting role. However, during clinical use, the front section is prone to damage the blood vessel. At present, most types of hard guide wires cannot balance support and avoid damaging blood vessels during clinical use. Content of the Utility Model

[0003] For this reason, an object of the present utility model is to provide a hard guide wire with a flexible bent head section to solve the problems mentioned in the background art and overcome the deficiencies in the prior art.

[0004] To achieve the above object, the present utility model adopts the following technical solutions:

[0005] A hard guide wire with a flexible bent head section includes a housing and a core wire. A receiving cavity is provided inside the housing, and the core wire is arranged in the receiving cavity. The housing includes a hard tube and a winding wire. The core wire includes a tail section and a head section. The hardness of the head section is less than that of the tail section, and the cross-sectional diameter of the head section gradually decreases in the direction away from the tail section.

[0006] Further, the tail section of the core wire is arranged inside the hard tube of the housing, and the head section of the core wire is arranged inside the winding wire of the housing. The winding wire and the head section can be bent to form a spiral curve shape.

[0007] Further, one end of the hard tube is connected to one end of the winding wire, and one end of the tail section is connected to one end of the head section.

[0008] Further, the length of the hard tube of the housing is greater than or equal to the length of the tail section of the core wire, and the length of the winding wire of the housing is equal to the length of the head section of the core wire.

[0009] Further, the hard tube and the winding wire are integrated, and the tail section and the head section are integrated.

[0010] Further, a hydrophilic coating is provided on the outer surface of the housing.

[0011] Further, both the housing and the core wire are made of metal materials.

[0012] Further, a top bead is provided at the other end of the winding wire.

[0013] Therefore, the utility model has the following beneficial effects:

[0014] A hard guide wire with a flexible head section according to the utility model forms a flexible section at the head section of the core wire of the hard guide wire, and the flexible section is inserted into the winding wire for fixation, so that while maintaining the overall support of the hard guide wire product, through the soft head section and the bent shape design, better protection of the blood vessel wall is achieved, and a perfect balance between stiffness and prevention of blood vessel damage is achieved.

[0015] Additional aspects and advantages of the utility model will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0017] Figure 1 is a schematic structural diagram of the hard guide wire of the utility model;

[0018] Figure 2 is a schematic structural diagram of the core wire of the utility model;

[0019] Figure 3 is a schematic structural diagram inside the hard guide wire of the utility model.

[0020] In the figure: 1, hard guide wire; 2, outer shell; 3, core wire; 4, hard tube; 5, winding wire; 6, tail section; 7, head section. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The embodiments of the utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model and should not be construed as limiting the utility model.

[0022] In the utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation" and other terms 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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the utility model can be understood according to specific situations.

[0023] Such as Figures 1 - 3As shown in the figure, a rigid guide wire 1 with a flexible bent head section includes a housing 2 and a core wire 3. A receiving cavity is provided inside the housing 2, and the core wire 3 is arranged in the receiving cavity. The housing 2 includes a rigid tube 4 and a winding wire 5. The core wire 3 includes a tail section 6 and a head section 7. The hardness of the head section 7 is less than that of the tail section 6, and the cross-sectional diameter of the head section 7 gradually decreases in the direction away from the tail section 6.

[0024] In a rigid guide wire 1 with a flexible bent head section of the present utility model, the head section 7 of the core wire 3 of the rigid guide wire 1 is designed to form a flexible section, and the flexible section is inserted into the winding wire 5 for fixation, so that while maintaining the overall support of the rigid guide wire 1 product, through the soft head section and the bent shape design, better protection of the blood vessel wall is achieved, and a perfect balance between stiffness and prevention of blood vessel damage is achieved.

[0025] Furthermore, the tail section 6 of the core wire 3 is arranged inside the rigid tube 4 of the housing 2, and the head section 7 of the core wire 3 is arranged inside the winding wire 5 of the housing 2. The winding wire 5 and the head section 7 can be bent to form a spiral curve shape.

[0026] Furthermore, one end of the rigid tube 4 is connected to one end of the winding wire 5, and one end of the tail section 6 is connected to one end of the head section 7.

[0027] Furthermore, the length of the rigid tube 4 of the housing 2 is greater than or equal to the length of the tail section 6 of the core wire 3, and the length of the winding wire 5 of the housing 2 is equal to the length of the head section 7 of the core wire 3.

[0028] As an implementation manner, the length of the rigid tube 4 of the housing 2 is equal to the length of the tail section 6 of the core wire 3, and the length of the winding wire 5 of the housing 2 is equal to the length of the head section 7 of the core wire 3.

[0029] As an implementation manner, the length of the rigid tube 4 of the housing 2 is greater than the length of the tail section 6 of the core wire 3, and the length of the winding wire 5 of the housing 2 is equal to the length of the head section 7 of the core wire 3.

[0030] Furthermore, the rigid tube 4 and the winding wire 5 are integrated, and the tail section 6 and the head section 7 are integrated.

[0031] It can be understood that although the housing 2 of the present utility model is divided into two parts, the rigid tube 4 and the winding wire 5, and the core wire 3 is divided into two parts, the tail section 6 and the head section 7, it does not mean that the rigid tube 4 or the core wire 3 is a split design or detachable. The housing 2 and the core wire 3 of the present utility model are integrated.

[0032] As another implementation manner, the two parts of the rigid tube 4 and the winding wire 5 of the housing 2 can also be separately formed and then fixedly connected together by welding.

[0033] As another implementation manner, the two parts of the tail section 6 and the head section 7 of the core wire 3 can also be separately formed and then fixedly connected together by welding.

[0034] Furthermore, a hydrophilic coating is provided on the outer surface of the housing 2.

[0035] The utility model coats a hydrophilic coating on the outer surface of the guide wire, which can effectively reduce the friction between the outer surface of the guide wire and the inner wall of the blood vessel, thereby avoiding damage to the inner wall of the blood vessel.

[0036] Furthermore, both the outer shell 2 and the core wire 3 are made of metal.

[0037] As an implementation manner, both the outer shell 2 and the core wire 3 are made of stainless steel.

[0038] Furthermore, a top bead is provided at the other end of the winding wire 5, and the top bead is not visible in the figure.

[0039] As an implementation manner, the metal core wire 3 with a flexible section can be prepared by physical grinding.

[0040] As an implementation manner, the winding wire 5 can be fixed to the metal core wire with a flexible section by laser welding.

[0041] As an implementation manner, the winding wire 5 can be fixed to the metal core wire with a flexible section by plasma welding.

[0042] As an implementation manner, the head section of the guide wire can be shaped by a cold setting device.

[0043] As an implementation manner, the head section of the guide wire can be shaped by a heat treatment process.

[0044] For the hard guide wire of the utility model, a flexible section is formed at the head end of the core wire of the hard guide wire by grinding, the flexible section is inserted into the winding wire, and is fixed by welding methods or techniques, and then the head end of the hard guide wire is shaped by a cold setting device, or a tooling, or a heat treatment process. While maintaining the overall support performance, the hard guide wire product achieves better protection for the blood vessel wall through the soft section at the head end and the head end bending design.

[0045] The hard guide wire of the utility model has a simple structure and low production cost, and the performance of the hard guide wire can balance the support performance and the blood vessel protection performance.

[0046] The combination of the core soft section and the head end bending design of the utility model can balance the support performance and the blood vessel protection performance.

[0047] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0048] It is not difficult for those skilled in the art to understand that the present utility model includes any combination of the utility model content and the specific implementation part of the above specification and each part shown in the drawings. Due to space limitations and to make the specification concise, the various solutions formed by these combinations are not described one by one. Any modification, equivalent replacement, improvement, etc., made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

[0049] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, replacements, and variations to the above embodiments within the scope of the present utility model without departing from the principle and purpose of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A hard guide wire with a flexible curved head section, characterized in that: It includes an outer shell and a core wire, wherein a housing cavity is provided in the outer shell, and the core wire is arranged in the housing cavity. The outer shell includes a hard tube and a winding wire, and the core wire includes a tail section and a head section. The hardness of the head section is smaller than that of the tail section, and the cross-sectional diameter of the head section gradually decreases in the direction away from the tail section.

2. A hard guide wire with a flexible curved head section according to claim 1, characterized in that: The tail section of the core wire is arranged in the hard tube of the outer shell, and the head section of the core wire is arranged in the winding wire of the outer shell. The winding wire and the head section can be bent to form a spiral curve.

3. A hard guide wire with a flexible curved head section according to claim 2, characterized in that: One end of the hard tube is connected to one end of the wire wrap, and one end of the tail section is connected to one end of the head section.

4. A hard guide wire with a flexible curved head section according to claim 1, characterized in that: The hard tube length of the outer shell is greater than or equal to the tail section length of the core wire, and the wire winding length of the outer shell is equal to the head section length of the core wire.

5. A hard guide wire with a flexible curved head section according to claim 4, characterized in that: The hard tube and the wire wrap are integrated, and the tail section and the head section are integrated.

6. A hard guide wire with a flexible curved head section according to claim 1, characterized in that: The outer surface of the shell is provided with a hydrophilic coating.

7. A hard guide wire with a flexible curved head section according to claim 6, characterized in that: The shell and the core wire are both made of metal.

8. A hard guide wire with a flexible curved tip section according to any one of claims 1 to 7, characterized in that: The other end of the winding wire is provided with a top bead.

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