Non-vascular lumen guide wire

Abstract

The present application relates to the technical field of medical instruments and particularly discloses a non-vascular lumen guide wire. The non-vascular lumen guide wire comprises a core wire, a spring tube, and an outer coating layer, wherein the spring tube sleeves the far end of the core wire; the outer coating layer coats the outer side of the core wire, and the spring tube is located between the core wire and the outer coating layer. The non-vascular lumen guide wire in the described solution incorporates a spring tube sleeving the far end of the core wire. This design, while ensuring that the far end of the guide wire has good flexibility, can enhance the elasticity of the far end of the guide wire, thereby ensuring the elastic recovery ability of the far end of the guide wire. The spring tube can function to constrain and correct the far end of the core wire, so that the far end of the guide wire will not easily kink after being bent. The guide wire can better adapt to the shape and curvature of a non-vascular lumen, reducing damage and friction to the surrounding tissue caused by the guide wire, thereby ensuring smooth insertion of the core wire into the non-vascular lumen.

Description

Non-luminal guide wire TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, and in particular to a non-luminal guide wire. BACKGROUND

[0002] A non-luminal guide wire is an elongated guide wire, which is usually made of flexible material and has excellent flexibility and lubricity, and is mainly used in the treatment of non-luminal cavities, for guiding surgical instruments such as catheters and implanters into non-luminal cavities. The non-luminal guide wire plays a role in positioning and guiding, helping doctors to accurately place surgical instruments in the correct position.

[0003] Since the inside of the non-luminal cavity is usually narrow and tortuous, the non-luminal guide wire needs to have good flexibility, however, the non-luminal guide wire in the related art has the problems of folding, knotting or difficult insertion during use. CONTENT

[0004] The present application discloses a non-luminal guide wire to solve the technical problem of difficult insertion of the non-luminal guide wire in the related art when introduced into the non-luminal cavity of a patient.

[0005] To solve the above problems, the present application adopts the following technical solutions:

[0006] The present application provides a non-luminal guide wire, which comprises a core wire, a spring tube and an outer cover, wherein the spring tube is sleeved on the distal end of the core wire, the outer cover is wrapped on the outer side of the core wire, and the spring tube is located between the core wire and the outer cover.

[0007] Further, the core wire comprises a first flexible section and a second flexible section, the second flexible section is connected to the distal end of the first flexible section, and the spring tube is sleeved on the second flexible section, so that the elasticity of the second flexible section is greater than that of the first flexible section.

[0008] Further, the first flexible section and the second flexible section are integrally connected, and the diameter of the second flexible section is smaller than that of the first flexible section.

[0009] Further, along the extension direction of the core wire from its proximal end to its distal end, the diameter of the second flexible section gradually decreases.

[0010] Further, the diameter of the spring tube is smaller than that of the first flexible section.

[0011] Further, the junction of the first flexible section and the second flexible section is connected and fixed with the proximal end of the spring tube.

[0012] Further, the joint of the first flexible section and the second flexible section is glued and fixed with the proximal end of the spring tube.

[0013] Further, the joint of the first flexible section and the second flexible section is provided with a frosted part, and the proximal end of the spring tube is glued and fixed with the frosted part.

[0014] Further, the distal end of the second flexible section is provided with a ball head, and the ball head has a gap with the distal end of the outer cover.

[0015] Further, the diameter of the ball head is greater than the diameter of the distal end of the outer cover.

[0016] Further, the distal end of the outer cover is provided with a chamfer.

[0017] The technical scheme adopted in the application can achieve the following beneficial effects:

[0018] The non-vascular lumen guide wire can increase the elasticity of the distal end of the guide wire while ensuring that the distal end of the guide wire has good flexibility, and can ensure the elastic recovery ability of the distal end of the guide wire. The spring tube can constrain and correct the distal end of the core wire, so that the distal end of the guide wire is not easy to produce folding after bending, can better adapt to the shape and bending degree of the non-vascular lumen, reduce the damage and friction of the guide wire to the surrounding tissue, and thus ensure the smoothness of the core wire inserted into the non-vascular lumen. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] FIG. 1 is a structural schematic view of a non-vascular lumen guide wire according to an embodiment of the application;

[0021] FIG. 2 is a partial enlarged view of A in FIG. 1;

[0022] FIG. 3 is a structural schematic view of a core wire according to an embodiment of the application;

[0023] FIG. 4 is a partial enlarged view of B in FIG. 3;

[0024] FIG. 5 is a cross-sectional view of a front end of a non-vascular lumen guide wire according to an embodiment of the application;

[0025] FIG. 6 is a partial enlarged view of C in FIG. 5.

[0026] In the drawings:

[0027] 100 - core wire, 110 - first flexible section, 120 - second flexible section; 200 - spring tube; 300 - outer covering; 400 - ball tip. DETAILED DESCRIPTION

[0028] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present application.

[0029] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually a class, and are not limited to the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in an "or" relationship.

[0030] The non-vascular lumen guide wire provided by the embodiments of the present application will be described in detail below in combination with FIGS. 1 to 6 through specific embodiments and application scenarios.

[0031] Please refer to FIGS. 1, 5 and 6, the present application discloses a non-vascular lumen guide wire, the disclosed non-vascular lumen guide wire includes a core wire 100, a spring tube 200 and an outer covering 300. Among them, the core wire 100 is the main part of the non-vascular lumen guide wire, which is usually a metal wire, has a certain flexibility, can adapt to the tortuous non-vascular lumen, and the core wire 100 can be a nickel-titanium alloy wire, a stainless steel wire, etc. The outer covering 300 is wrapped outside the core wire 100, and the outer covering is usually made of polymer material. The outer covering 300 can protect the core wire 100 from corrosion and damage, and at the same time provide good lubrication performance, which can reduce the friction and damage of the surrounding tissue of the non-vascular lumen guide wire when passing through the narrow and tortuous lumen, and the outer covering 300 can be polyethylene, polytetrafluoroethylene, etc.

[0032] In the embodiment of the present application, the spring tube 200 is sleeved on the distal end of the core wire 100, and the spring tube 200 is located between the core wire 100 and the outer cover 300. By sleeving the spring tube 200 on the distal end of the core wire 100, the spring tube 200 has better resilience performance after being bent under stress than the core wire 100. Based on the arrangement of the spring tube 200, the distal end of the guide wire has good flexibility while the elasticity of the distal end of the guide wire is increased, the elastic recovery ability of the distal end of the guide wire is ensured, the spring tube 200 can constrain and correct the distal end of the core wire 100, so that the distal end of the guide wire is not easy to be bent after being bent, and the shape and curvature of the non-vascular lumen can be better adapted, the damage and friction of the guide wire to the surrounding tissue are reduced, and thus the smoothness of the guide wire inserted into the non-vascular lumen is ensured.

[0033] In the embodiment of the present application, please refer to FIG. 3, FIG. 4, FIG. 5 and FIG. 6, the core wire 100 includes a first flexible section 110 and a second flexible section 120, the second flexible section 120 is connected to the distal end of the first flexible section 110, and the spring tube 200 is sleeved on the second flexible section 120, so that the elasticity of the second flexible section 120 is greater than that of the first flexible section 110. It should be noted that the first flexible section 110 and the second flexible section 120 herein can deform under external force to adapt to the tortuous lumen and the curved shape, and have a certain elastic recovery ability, and can recover the deformation after the external force is removed.

[0034] The elastic recovery ability of the first flexible section 110 and the second flexible section 120 can be the same or different. In the case where the spring tube 200 is not sleeved on the second flexible section 120, since the second flexible section 120 first contacts the inner wall of the lumen, when the external force applied to the second flexible section 120 is too large or lasts for too long, the second flexible section 120 is easy to be bent and difficult to completely recover the deformation. In the embodiment of the present application, after the spring tube 200 is sleeved on the second flexible section 120, the elastic recovery ability of the whole guide wire is better than that of the first flexible section 110. In this way, the second flexible section 120 can further bend at the distal end of the first flexible section 110 when exploring the lumen, so as to better adapt to the shape of the complex non-vascular lumen, and the second flexible section 120 is easy to recover the deformation after being bent and deformed without being bent.

[0035] In an alternative embodiment, the first flexible section 110 and the second flexible section 120 can be integrally connected with the same material, and the diameter of the second flexible section 120 is smaller than that of the first flexible section 110. The integral connection of the first flexible section 110 and the second flexible section 120 can improve the stability and reliability of the whole core wire 100, and the first flexible section 110 and the second flexible section 120 become a continuous whole without joints or connection points, thereby avoiding problems such as loosening or breaking of the connection points. The diameter of the second flexible section 120 is smaller, so that the second flexible section 120 has stronger bending flexibility and stronger bending adaptability than the first flexible section 110.

[0036] In the embodiments of the present application, the diameter of the second flexible section 120 is smaller than that of the first flexible section 110. In an alternative embodiment, referring to FIGS. 3 and 4, along the extension direction of the core wire 100 from the proximal end to the distal end, the diameter of the second flexible section 120 can be consistent. In another alternative embodiment, the second flexible section 120 and the first flexible section 110 are smoothly transitioned, and along the extension direction of the core wire 100 from the proximal end to the distal end, the diameter of the second flexible section 120 gradually decreases. In this way, the stress on the second flexible section 120 during bending can be gradually dispersed, avoiding stress concentration, so that the second flexible section 120 bends more naturally and smoothly and is less likely to be folded.

[0037] In the embodiments of the present application, the diameter of the spring tube 200 is smaller than that of the first flexible section 110, and after the spring tube 200 is sleeved on the second flexible section 120, the first flexible section 110 can limit the spring tube 200, avoiding the spring tube 200 from moving randomly on the core wire 100. In addition, the spring tube 200 has good adhesion with the second flexible section 120, and the spring tube 200 occupies a small space, so that the contact area with the surrounding tissues during the bending or passing of the guide wire is reduced, thereby reducing the friction and resistance. This makes the distal end of the guide wire pass through the tortuous channel more smoothly, and reduces the stimulation and damage to the internal tissues of the human body.

[0038] In further technical solutions, the proximal end of the spring tube 200 is glued and fixed to the core wire 100, specifically, the proximal end of the spring tube 200 is glued and fixed at the joint of the first flexible section 110 and the second flexible section 120, and the distal end of the spring tube 200 is a free end. In this way, the proximal end of the spring tube 200 is fixed, which can prevent the spring tube 200 from rotating or moving on the core wire 100, further avoiding the spring tube 200 from moving randomly on the core wire 100, and improving the stability of the whole guide wire. On the other hand, the free end of the spring tube 200 can be adaptively stretched and contracted along the axial direction, which can better adapt to the bending and changes of the cavity, and reduce the trauma to the patient.

[0039] The inventors found in the research process that due to the smooth outer surface of the core wire 100, after the spring tube 200 is glued and fixed to the core wire 100, the glue layer formed after the glue solidifies is easy to separate from the outer surface of the core wire 100, thereby causing the spring tube 200 to loosen. Based on this situation, in the optional embodiment of the present application, a frosted part is arranged at the joint of the first flexible section 110 and the second flexible section 120, and the proximal end of the spring tube 200 is glued and fixed to the frosted part. The frosted part can increase the adhesion area of the glue, so that the glue layer formed after the glue solidifies can be stably kept on the core wire 100, and the glue can also be immersed into the gap between the adjacent two spiral units of the spring tube 200, thereby increasing the stability of the connection between the spring tube 200 and the core wire 100.

[0040] Please refer to FIGS. 2, 4 and 6, in the optional embodiment of the present application, the distal end of the second flexible section 120 is provided with a ball head 400, and the ball head 400 is connected to the core wire 100 by spot welding, for example. The outer surface of the ball head 400 is an arc surface, which can better adapt to the inner wall of the cavity when the guide wire is introduced into the body cavity of the patient, thereby reducing the contact area and friction with the inner wall of the cavity, which is conducive to reducing the resistance of the non-vascular cavity guide wire during operation. In addition, the arc surface of the ball head 400 can reduce the damage to the inner wall of the cavity, thereby reducing the trauma and the risk of complications to the patient.

[0041] In the case where the outer cover 300 is wrapped on the ball head 400, the thin wall of the outer cover 300 protrudes from the outer surface of the ball head 400 and forms a stepped surface, and during the process of the guide wire extending into the cavity, the thin wall of the outer cover 300 may be in contact with the inner wall of the cavity and cause scratches. Based on this situation, in a further technical solution, there is a gap between the ball head 400 and the distal end of the outer cover 300, that is, the outer cover 300 is not wrapped on the ball head 400. During the process of the guide wire being introduced into the cavity, the ball head 400 first contacts the inner wall of the cavity and pushes the inner wall of the cavity outward, so that the pushed inner wall of the cavity is difficult to contact the distal end surface of the thin wall of the outer cover 300 again, thereby avoiding the situation that the distal end surface of the thin wall of the outer cover 300 is in contact with the inner wall of the cavity and causes scratches.

[0042] In a further technical solution, the distal end of the outer cover 300 is provided with a chamfer, which is preferably an arc chamfer. Based on the arrangement of the chamfer, the end surface size of the distal end of the outer cover 300 is smaller, and it is more difficult to contact the inner wall of the cavity and cause scratches. In addition, even if the inner wall of the cavity contacts the end surface of the distal end of the outer cover 300, the arrangement of the chamfer can reduce the friction between the two, thereby ensuring the smoothness and safety of the guide wire extending into the cavity.

[0043] In a further technical solution, the diameter of the ball head 400 is greater than the diameter of the distal end of the outer covering 300, so that the cavity wall pushed outward by the ball head 400 is more likely to directly pass the distal end of the outer covering 300 without contacting the distal end surface of the outer covering 300, further ensuring the smoothness of the guide wire movement.

[0044] It should be noted that, in this document, the terms "comprising", "including", or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements, but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, an element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element. In addition, it should be pointed out that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but can also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method can be performed in an order different from that described, and various steps can also be added, omitted, or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0045] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application.

Claims

1. A non-vascular lumen guide wire, characterized by, The core wire (100), the spring tube (200) and the outer covering (300); wherein: The spring tube (200) is sleeved on the distal end of the core wire (100), the outer covering (300) is wrapped on the outer side of the core wire (100), and the spring tube (200) is located between the core wire (100) and the outer covering (300).

2. The non-luminal guide wire of claim 1, wherein, The core wire (100) comprises a first flexible section (110) and a second flexible section (120), the second flexible section (120) is connected to the distal end of the first flexible section (110), and the spring tube (200) is sleeved on the second flexible section (120), so that the elasticity of the second flexible section (120) is greater than that of the first flexible section (110).

3. The non-luminal guide wire of claim 2, wherein, The first flexible section (110) and the second flexible section (120) are integrally connected, and the diameter of the second flexible section (120) is smaller than that of the first flexible section (110).

4. The non-luminal guide wire of claim 3, wherein, The diameter of the second flexible section (120) gradually decreases along the extension direction of the core wire (100) from the proximal end to the distal end.

5. The non-luminal guide wire of claim 4, wherein, The diameter of the spring tube (200) is smaller than that of the first flexible section (110).

6. The non-luminal guide wire according to any one of claims 2 to 5, wherein The joint of the first flexible section (110) and the second flexible section (120) is connected and fixed with the proximal end of the spring tube (200).

7. The non-luminal guide wire of claim 6, wherein, The joint of the first flexible section (110) and the second flexible section (120) is glued and fixed with the proximal end of the spring tube (200). And / or, the joint of the first flexible section (110) and the second flexible section (120) is provided with a frosted part, and the proximal end of the spring tube (200) is glued and fixed with the frosted part.

8. The non-luminal guide wire according to any one of claims 2 to 3, wherein The distal end of the second flexible section (120) is connected and provided with a ball head (400), and the ball head (400) has a gap with the distal end of the outer covering (300).

9. The non-luminal guide wire of claim 8, wherein, The diameter of the ball head (400) is greater than that of the distal end of the outer covering (300).

10. The non-luminal guide wire of claim 9, wherein, The distal end of the outer covering (300) is provided with a chamfer.

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