Guide wire

Abstract

The utility model discloses a guide wire which comprises a first core wire and a second core wire. The hardness of the second core wire is lower than that of the first core wire, and one end of the first core wire is bonded with one end of the second core wire; the sleeve is arranged on the outer side of the bonding position of the first core wire and the second core wire in a sleeving mode, the guide wire has the good flexible deformation capacity, the guide wire control convenience is improved, and the surgical operation efficiency is improved.

Description

Technical Field

[0001] This utility model relates to a medical device, and more particularly to a guidewire. Background Technology

[0002] Guidewires are primarily used in medical surgeries and are medical devices used to assist in interventional treatments. To ensure that the guidewire can bend and deform to a certain extent within the blood vessel, current guidewires are usually made of materials with lower hardness. This effectively reduces the risk of vascular damage caused by a stiff guidewire. However, this results in lower coaxiality of the guidewire. When it is necessary to control the guidewire's bending movements, the guidewire is more prone to kinking due to external forces, meaning that the precision of controlling the guidewire's movement is lower, which is not conducive to surgical operations. Therefore, there is an urgent need for a guidewire that better balances the guidewire's flexibility and ease of operation. Utility Model Content

[0003] The purpose of this utility model is to provide a guidewire to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0004] The solution to the technical problem of this utility model is:

[0005] A guide wire includes: a first core wire; a second core wire with a hardness lower than that of the first core wire, one end of the first core wire and one end of the second core wire being bonded together; and a sleeve fitted over the outside of the bonded joint between the first core wire and the second core wire.

[0006] This technical solution has at least the following beneficial effects: the first and second guidewires are bonded together at their ends, and a cannula is used to protect the bonding position. During use, the first guidewire is closer to the user's point of force application, while the second guidewire is closer to the target position inside the patient's body. When manipulation and adjustment are required, the user applies force to the first guidewire, which drives the second guidewire. Because the first guidewire is harder than the second guidewire, the rate of force application and bending can be reduced, allowing the second guidewire to reach the target position more accurately. The second guidewire is less rigid and can move better along the blood vessel. This gives the guidewire good flexibility and deformation ability, improves the ease of guidewire manipulation, and increases the efficiency of surgical operations.

[0007] As a further improvement to the above technical solution, the end of the first core wire has a first hook, and the end of the second core wire has a second hook. The first hook and the second hook are hooked together and bonded. When connecting the ends of the first core wire and the second core wire, glue is applied to the first hook and the second hook respectively. Then, the first hook and the second hook are hooked together. At this time, the ends of the first core wire and the second core wire can be quickly aligned and bonded using glue, thereby improving the connection and fixing efficiency of the first core wire and the second core wire.

[0008] As a further improvement to the above technical solution, adhesive layers are respectively provided at the outer positions of the first core wire end near the first hook and the outer positions of the second core wire end near the second hook, and the adhesive layers are located inside the sleeve. After the first hook and the second hook are hooked and bonded together, adhesive is applied to the outer positions of the first core wire end near the first hook and the outer positions of the second core wire end near the second hook to form adhesive layers. At this time, the sleeve is sleeved on the outside of the first core wire and the second core wire, and the adhesive layers are used to further connect and fix the sleeve to the outside of the first core wire and the second core wire.

[0009] As a further improvement to the above technical solution, a first adhesive transition ring is provided between one end of the sleeve and the outer side of the second core wire. The first adhesive transition ring can enhance the fixing effect of the sleeve at one end, which helps to prevent the sleeve from slipping relative to the second core wire and further improves the stability of the sleeve connection.

[0010] As a further improvement to the above technical solution, a second adhesive transition ring is provided between the other end of the sleeve and the outer side of the first core wire. The second adhesive transition ring can enhance the fixing effect of the sleeve at the other end, which helps to prevent the sleeve from slipping relative to the first core wire and further improves the stability of the sleeve connection.

[0011] As a further improvement to the above technical solution, this utility model also includes a visualization spring, which is sleeved on the outer side of the end of the second core wire away from the first core wire. The visualization spring can enhance the visibility of the guidewire in the body, making it easier for doctors to operate accurately during surgery, thereby reducing operational errors and risks. Furthermore, the visualization spring can reduce the friction on the surface of the guidewire, making the guidewire move more smoothly within the blood vessel.

[0012] As a further improvement to the above technical solution, a spherical dispensing head is provided between the end of the second core wire furthest from the first core wire and the end of the imaging spring. The spherical dispensing head connects one end of the imaging spring to the second core wire, preventing the imaging spring from detaching from the second core wire. Furthermore, the spherical dispensing head can shield the end of the imaging spring, and its curved surface contacts the blood vessel, thus providing better protection.

[0013] As a further improvement to the above technical solution, a third adhesive transition ring is provided between the end of the developing spring near the first core wire and the outer side of the second core wire. The third adhesive transition ring can connect the other end of the developing spring to the second core wire, preventing the developing spring from slipping relative to the second core wire. Furthermore, the third adhesive transition ring can shield the other end of the developing spring, effectively reducing the exposed structure of the developing spring end and providing better protection.

[0014] As a further improvement to the above technical solution, the first core wire is made of stainless steel. The stainless steel first core wire has good coaxiality, which can reduce the bending effect when force is applied.

[0015] As a further improvement to the above technical solution, the second core wire is made of nickel-titanium alloy. The nickel-titanium alloy second core wire has excellent flexibility and deformation properties, better adapting to bends within blood vessels, and can return to its straight shape after external force is removed, facilitating manipulation. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of this utility model, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0017] Figure 1 This is an overall front view of the present invention.

[0018] Figure 2 yes Figure 1 A schematic diagram of the AA cross-sectional structure.

[0019] Figure 3 yes Figure 2 A magnified view of part B.

[0020] Figure 4 yes Figure 2 A magnified schematic diagram of part C.

[0021] In the attached diagram: 100 - first core wire, 110 - first hook, 200 - second core wire, 210 - second hook, 300 - sleeve, 310 - first glue transition ring, 320 - second glue transition ring, 400 - developing spring, 410 - spherical dispensing head, 420 - third glue transition ring. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying 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 with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0023] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0025] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0026] Reference Figure 1 , Figure 2 A guide wire includes a first core wire 100, a second core wire 200, and a sleeve 300, wherein the hardness of the second guide wire is lower than that of the first core wire 100, one end of the first core wire 100 and one end of the second core wire 200 are bonded to each other, and the sleeve 300 is sleeved on the outside of the bonded joint between the first core wire 100 and the second core wire 200.

[0027] As described above, the first core wire 100 and the second core wire 200 are bonded together at their ends, and a sleeve 300 is fitted over the bonding position to protect it. During use, the first core wire 100 is closer to the user's point of force application, while the second core wire 200 is closer to the target position inside the patient's body. When adjustment is required, the user applies force to the first core wire 100, which drives the second core wire 200 to move. Since the first core wire 100 is harder than the second core wire 200, the rate of force application and bending can be reduced, allowing the second core wire 200 to reach the target position more accurately. The second core wire 200 is less rigid and can move better along the blood vessel. This gives the guidewire good flexibility and deformation ability, improves the ease of guidewire manipulation, and increases the efficiency of surgical operations.

[0028] To increase the stability of the connection between the first core wire 100 and the second core wire 200 and prevent them from loosening, in this embodiment, the end of the first core wire 100 is formed with a first hook 110, and the end of the second core wire 200 is formed with a second hook 210. The first hook 110 and the second hook 210 are hooked together and bonded. When connecting the ends of the first core wire 100 and the second core wire 200, glue is applied to the first hook 110 and the second hook 210 respectively. Then, the first hook 110 and the second hook 210 are hooked together. At this time, the ends of the first core wire 100 and the second core wire 200 can be quickly aligned and bonded using glue, improving the connection and fixing efficiency of the first core wire 100 and the second core wire 200. In practical applications, the first hook 110 and the second hook 210 can be formed using a centerless grinder.

[0029] The sleeve 300 can be relatively positioned by the friction between its inner wall and the first core wire 100 and the second core wire 200. To more stably position the sleeve 300, such as... Figure 3 As shown, in this embodiment, adhesive layers are respectively provided at the outer positions of the first core wire 100 near the first hook 110 and the second core wire 200 near the outer positions of the second hook 210, and the adhesive layers are located inside the sleeve 300. After the first hook 110 and the second hook 210 are hooked and bonded together, adhesive is applied to the outer positions of the first core wire 100 near the first hook 110 and the second core wire 200 near the second hook 210 to form adhesive layers. At this time, the sleeve 300 is sleeved on the outside of the first core wire 100 and the second core wire 200, and the adhesive layers are used to further connect and fix the sleeve 300 to the outside of the first core wire 100 and the second core wire 200.

[0030] To more stably secure the cannula 300 and prevent its end from scraping against the inner wall of the blood vessel, in this embodiment, a first adhesive transition ring 310 is provided between one end of the cannula 300 and the outer side of the second core wire 200. The first adhesive transition ring 310 can enhance the fixation effect of the cannula 300 at one end, which helps to prevent relative slippage of the cannula 300 relative to the second core wire 200, and further improves the stability of the cannula 300 connection.

[0031] Furthermore, a second adhesive transition ring 320 is provided between the other end of the sleeve 300 and the outer side of the first core wire 100. The second adhesive transition ring 320 can enhance the fixing effect of the sleeve 300 at the other end of the sleeve 300, which helps to prevent relative slippage of the sleeve 300 relative to the first core wire 100, and further improves the stability of the connection of the sleeve 300. In practical applications, the first adhesive transition ring 310 and the second adhesive transition ring 320 are cured products formed after the adhesive is filled into the concave corner of the end of the sleeve 300 and the outer wall of the first core wire 100 and the second core wire 200.

[0032] This invention also includes a visualization spring 400, which is sleeved on the outer side of the end of the second core wire 200 away from the first core wire 100. The visualization spring 400 enhances the visibility of the guidewire in the body, facilitating accurate operation by the doctor during surgery, thereby reducing operational errors and risks. Furthermore, the visualization spring 400 reduces friction on the guidewire surface, making the guidewire move more smoothly within the blood vessel.

[0033] There are several ways to fix the developing spring 400 to the outside of the second core wire 200, for example, Figure 4 As shown, adhesive can be applied directly between the inner side of the imaging spring 400 and the outer side of the second core wire 200, or adhesive can be applied to the end of the imaging spring 400. Specifically, a spherical dispensing head 410 is provided between the end of the second core wire 200 away from the first core wire 100 and the end of the imaging spring 400. In practical applications, the spherical dispensing head 410 can be a cured product formed by the adhesive curing at the end of the second core wire 200. The spherical dispensing head 410 can connect one end of the imaging spring 400 to the second core wire 200 and prevent the imaging spring 400 from detaching from the second core wire 200. Furthermore, the spherical dispensing head 410 can shield the end of the imaging spring 400, and by utilizing the arc surface of the spherical dispensing head 410 itself to contact the blood vessel, it can better provide protection.

[0034] Furthermore, a third adhesive transition ring 420 is provided between the end of the developing spring 400 near the first core wire 100 and the outer side of the second core wire 200. In practical applications, the third adhesive transition ring 420 can be a cured material formed around the point between the end of the developing spring 400 and the outer side of the second core wire 200. The third adhesive transition ring 420 can connect the other end of the developing spring 400 to the second core wire 200, preventing relative slippage between the developing spring 400 and the second core wire 200. The third adhesive transition ring 420 can also shield the other end of the developing spring 400, effectively reducing the exposed structure of the end of the developing spring 400 and providing better protection.

[0035] In some embodiments, the first core wire 100 is made of stainless steel. The stainless steel first core wire 100 has good coaxiality, which can reduce the bending effect when force is applied.

[0036] In some embodiments, the second core wire 200 is made of nickel-titanium alloy. The nickel-titanium alloy second core wire 200 has good flexibility and deformation properties, which can better adapt to the bending conditions in the blood vessel, and can return to straight after the external force is removed, making it easy to handle.

[0037] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A guide wire, characterized by: Comprise: A first core wire (100); A second core wire (200) with a hardness lower than that of the first core wire (100), one end of the first core wire (100) and one end of the second core wire (200) being mutually adhered; A sleeve (300) sleeved outside the mutual adhesion position of the first core wire (100) and the second core wire (200).

2. A guide wire according to claim 1, characterized in that: The end of the first core wire (100) is formed with a first hook (110), and the end of the second core wire (200) is formed with a second hook (210), the first hook (110) and the second hook (210) being mutually hooked and adhered.

3. A guide wire according to claim 2, characterized in that: The outer side position of the end of the first core wire (100) close to the first hook (110) and the outer side position of the end of the second core wire (200) close to the second hook (210) are respectively provided with a glue layer, and the glue layer is located inside the sleeve (300).

4. The guide wire of claim 1, wherein: A first glue transition ring (310) is arranged between one end of the sleeve (300) and the outside of the second core wire (200).

5. The guide wire of claim 1, wherein: A second glue transition ring (320) is arranged between the other end of the sleeve (300) and the outside of the first core wire (100).

6. The guide wire of claim 1, wherein: Further comprising a developing spring (400) sleeved outside the end of the second core wire (200) away from the first core wire (100).

7. A guide wire according to claim 6, characterized in that: A spherical dispensing head (410) is arranged between the end of the second core wire (200) away from the first core wire (100) and the end of the developing spring (400).

8. A guide wire according to claim 6, characterized in that: A third glue transition ring (420) is arranged between the end of the developing spring (400) close to the first core wire (100) and the outside of the second core wire (200).

9. The guide wire of claim 1, wherein: The first core wire (100) is made of stainless steel.

10. The guide wire of claim 1, wherein: The second core wire (200) is made of nickel-titanium alloy.

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