Bending-adjustable guide wire

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to an adjustable bending guide wire which comprises a core shaft, a sheath and an end socket, the sheath is sleeved on the outer side of the core shaft, a plurality of hoses and a plurality of corrugated pipes are arranged at the far end of the sheath, the hoses and the corrugated pipes are alternately arranged, electromagnets are embedded in the same axial position of each hose, and the ends of the electromagnets are connected with the core shaft. The electromagnets are connected with an external power supply device through wires, every two adjacent electromagnets repel each other due to the same magnetic poles, every two adjacent electromagnets attract each other due to different magnetic poles, and the electromagnets move to push the hose to be compressed or stretched, so that the guide wire is deflected. The sheath is composed of the hose and the corrugated pipe, the electromagnets are arranged in the hose, and the magnetic pole direction of the electromagnets can be changed by electrifying the electromagnets during use, so that the corrugated pipe between the two electromagnets is compressed or stretched under the influence of magnetic force, and the bending direction of the guide wire is deflected. The controllability of the guide wire is better, and the guide wire can better pass through complex blood vessels.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and particularly relates to an adjustable curved guide wire. Background Art

[0002] Interventional therapy is a minimally invasive treatment. Under the guidance of medical imaging equipment, special catheters, medical guidewires and other precision instruments are introduced into the human body to diagnose and locally treat lesions in the body. As a common medical device, the guidewire is widely used in various interventional surgeries. Its main function is to serve as a guide device to first enter the body's lumen such as blood vessels and ureters, and reach the target site with the assistance of medical imaging methods such as ultrasound and X-rays, so as to establish a path for the subsequent intervention and implantation of catheters or other medical devices for diagnosis and treatment. Before the medical guidewire enters the human body, it is usually necessary to bend the head of the medical guidewire to make it have a suitable angle. Because the channels and blood vessels in the human body are intricate and have many branches, the bending angle of the medical guidewire needs to be frequently adjusted during the operation to meet the various channels and blood vessel branches. The operation is complicated, the efficiency of interventional treatment is low, and the delivery work is greatly increased. This undoubtedly places high demands on medical operators, resulting in an increase in operation time. In addition, the inevitable shaking of the hands and the fatigue of long-term operation increase the risk of surgery, which in turn affects the success rate and safety of the surgery.

[0003] CN204972649U of China discloses an adjustable fishing guide wire, wherein a traction wire is provided inside the guide wire to connect the distal spring segment and the proximal handle screw rod, and the handle screw rod is threadedly matched with the handle base, and the traction wire is driven to move toward the proximal end of the guide wire by operating the handle screw rod, thereby realizing the bending adjustment of the spring segment. The disadvantage of this technology is that the adjustment wire runs through the guide wire, and during the bending adjustment process, while the distal end of the guide wire is bent, the proximal end may also be affected by the traction wire, so that the guide wire as a whole is bent and deformed, and the bending adjustment effect, bending adjustment accuracy and bending adjustment controllability are poor, which is not conducive to the guide wire passing through tortuous blood vessels, and may cause risks such as vascular spasm due to the bending deformation of the guide wire, and because the guide wire as a whole is bent and deformed, the deformation is large, which easily causes the guide wire to be irreversibly bent or even broken, and at the same time, the guide wire realizes the distal bending adjustment through the traction wire, and the adjustment direction and adjustment angle are relatively limited, and the applicability is poor.

[0004] In the prior art, a manual control guidewire is usually used to manually rotate and bend the guidewire through an operating handle or a control rod. The existing adjustable bend guidewire mainly adjusts the distal bend shape through a traction wire or an adjustment wire inside the guidewire. The bending angle is single, and the bending effect, bending accuracy, and bending controllability are poor. At the same time, the overall deformation of the guidewire is large, which can easily cause the guidewire to bend or break, and the clinical application risk is relatively high. Therefore, it is necessary to improve the prior art to solve the above problems. Utility Model Content

[0005] The utility model aims to provide an adjustable curved guide wire, aiming to solve the technical problem that the guide wire control method in the prior art cannot flexibly and accurately control the guide wire.

[0006] To achieve the above-mentioned purpose, an embodiment of the utility model provides an adjustable bend guide wire, including a core shaft, a sheath and an end head, wherein the sheath is sleeved on the outside of the core shaft, and a plurality of hoses and a plurality of bellows are arranged at the distal end of the sheath, and the hoses and the bellows are arranged alternately, and an electromagnet is embedded in the same axial position of each of the hoses, and the electromagnet is connected to an external power supply device through a wire, and the magnetic poles of two adjacent electromagnets are the same and repel each other, and the magnetic poles of two adjacent electromagnets are different and attract each other, and the movement of the electromagnet drives the compression or extension of the hose, thereby deflecting the guide wire; the distal end of the sheath and the distal end of the core shaft are connected to the end head.

[0007] As a preferred solution, it also includes a magnetic shielding material layer, and the arrangement position of the magnetic shielding material layer includes at least one of the following:

[0008] The magnetic shielding material layer covers the inner surface of the hose;

[0009] The magnetic shielding material layer is disposed around the circumference of the core shaft.

[0010] As a preferred solution, a plurality of the electromagnets are arranged in each of the hoses, and the electromagnets in the same hose are symmetrically arranged around the core axis.

[0011] As a preferred solution, the surface of the sheath is coated with an electrical insulation coating.

[0012] As a preferred solution, the electrical insulation coating is a polytetrafluoroethylene coating.

[0013] As a preferred embodiment, the sheath includes a bending section, a flexible support section and a rigid support section; the hose and the bellows constitute the bending section; the distal end of the flexible support section is connected to the proximal end of the bending section; and the distal end of the rigid support section is connected to the proximal end of the flexible support section.

[0014] As a preferred solution, the bending angle of the sheath is 0-50°.

[0015] As a preferred solution, the flexible supporting section is a spring.

[0016] As a preferred solution, the core shaft comprises a distal section, a middle section and a proximal section which are connected in sequence, and the diameters of the distal section, the middle section and the proximal section decrease in sequence.

[0017] As a preferred solution, the terminal is an X-ray visible terminal.

[0018] The above one or more technical solutions in the adjustable curved guidewire provided by the embodiment of the utility model have at least one of the following technical effects:

[0019] The utility model is composed of a hose and a bellows through a sheath, and an electromagnet is arranged in the hose. When in use, the direction of its magnetic pole can be changed by energizing the electromagnet, so that the bellows between the two electromagnets is compressed or stretched under the influence of magnetic force, so that the bending direction of the guide wire is deflected. The guide wire has better controllability and can pass through complex blood vessels better. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 A schematic diagram of the overall structure of an adjustable curved guide wire provided in an embodiment of the utility model;

[0022] Figure 2 A partially enlarged schematic diagram of an adjustable curved guide wire provided in an embodiment of the utility model;

[0023] Figure 3 A schematic diagram of the use state of the adjustable curved guide wire provided in the embodiment of the utility model;

[0024] Figure 4 for Figure 2 Schematic diagram of the middle AA section;

[0025] Among them, the reference numerals in the figure are:

[0026] 100-core shaft; 110-distal section; 120-middle section; 130-proximal section; 200-sheath; 210-bend section; 211-hose; 212-bellows; 213-electromagnet; 220-flexible support section; 230-rigid flexible support section; 240-electrical insulating coating; 300-end; 1-first electromagnet; 2-second electromagnet; 3-third electromagnet; 4-fourth electromagnet; 5-fifth electromagnet; 6-sixth electromagnet. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0028] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0030] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0031] In one embodiment of the present invention, Figure 1 As shown, an adjustable curved guidewire is provided, comprising a core shaft 100, a sheath 200 and a terminal 300. The sheath 200 is sleeved on the outside of the core shaft 100, and the distal ends of the sheath 200 and the core shaft 100 are both connected to the terminal 300. It should be noted that the "proximal end" involved in the above description and the following description generally refers to the end of the medical device close to the operator during normal operation, and the "distal end" generally refers to the end of the medical device that first enters the patient's body during normal operation.

[0032] The mandrel 100 includes a distal section 110, a middle section 120 and a proximal section 130 connected in sequence, and the diameters of the distal section 110, the middle section 120 and the proximal section 130 are successively reduced. By gradually reducing the diameter of the mandrel 100 from the proximal end to the distal end, the guide wire can be more easily bent, and the bending amplitude at the distal end is larger, so that it can better pass through blood vessels with complex shapes, and the operation accuracy is higher.

[0033] Furthermore, the mandrel 100 is made of a variety of materials selected from nickel-titanium alloy, stainless steel, cobalt-based alloy, manganese-iron alloy, zinc-copper alloy, and nickel-iron alloy. The softness of the mandrel 100 gradually increases from the proximal end to the distal end, effectively ensuring the operability and easy-to-bend guide shape of the guide wire. Specifically, the softness of the middle section 120 is greater than the softness of the proximal section 110, and the softness of the distal section 130 is greater than the softness of the middle section 120.

[0034] The sheath 200 includes a curved segment 210 , a flexible support segment 220 and a rigid support segment 230 . The distal end of the flexible support segment 220 is connected to the proximal end of the curved segment 210 ; the distal end of the rigid support segment 230 is connected to the proximal end of the flexible support segment 220 .

[0035] Furthermore, the distal end of the sheath 200 is provided with a plurality of hoses 211 and a plurality of bellows 212, and the hoses 211 and the bellows 212 constitute the curved section 210. The flexible support section 220 is a spring. The rigid support section 230 is a hollow tube. The materials of the curved section 210, the flexible support section 220 and the rigid support section 230 are different to adapt to the different softness of various parts of the core shaft 100, thereby improving the support, maneuverability and tracking of the guide wire.

[0036] Specifically, the hose 211 and the bellows 212 are alternately arranged, and an electromagnet 213 is embedded in the same axial position of each hose 211, and the electromagnet 213 is connected to an external power supply device through a wire. The magnetic poles of two adjacent electromagnets 213 are the same and repel each other, and the magnetic poles of two adjacent electromagnets 213 are different and attract each other. The movement of the electromagnet 213 promotes the compression or extension of the hose 211, thereby deflecting the guide wire. A plurality of electromagnets 213 are arranged in each hose 211, and the electromagnets 213 in the same hose 211 are symmetrically arranged around the core shaft 100. Specifically, as Figure 4 As shown, in this embodiment, four electromagnets 213 are arranged in each of the hoses 211, and the four electromagnets 213 are evenly arranged in the hoses 211. Through the above arrangement, the bending angle of the sheath 200 reaches 0-50°.

[0037] When using, Figure 2-Figure 3When the guide wire needs to be deflected to one side, for example, the left side, the power supply of the first electromagnet 1, the third electromagnet 3 and the fifth electromagnet 5 is changed so that the magnetic poles of the first electromagnet 1 and the third electromagnet 3 on the adjacent side are opposite, and the magnetic poles of the third electromagnet 3 and the fifth electromagnet 5 on the adjacent side are opposite. The first electromagnet 1 and the third electromagnet 3 attract each other, and the third electromagnet 3 and the fifth electromagnet 5 attract each other, and the bellows 212 between the three is compressed, so that the guide wire is deflected to the left side.

[0038] At the same time, the power supply of the second electromagnet 2, the fourth electromagnet 4 and the sixth electromagnet 6 can be changed so that the second electromagnet 2 and the fourth electromagnet 4 repel each other with the same poles, the fourth electromagnet 4 and the sixth electromagnet 6 repel each other with the same poles, and the bellows 200 between the three is stretched, further increasing the angle of the guide wire deflection to the left.

[0039] When the guide wire needs to be bent in an "S" shape, the magnetic poles of the adjacent sides of the first electromagnet 1 and the third electromagnet 3 can be the same, the magnetic poles of the adjacent sides of the third electromagnet 3 and the fifth electromagnet 5 can be opposite, the magnetic poles of the adjacent sides of the first electromagnet 2 and the fourth electromagnet 4 can be opposite, and the magnetic poles of the adjacent sides of the fourth electromagnet 4 and the sixth electromagnet 6 can be the same. Thus, the bellows 212 between the first electromagnet 1 and the third electromagnet 3 is stretched, the bellows 212 between the fourth electromagnet 4 and the sixth electromagnet 6 is stretched, the bellows 212 between the third electromagnet 3 and the fifth electromagnet 5 is contracted, and the bellows 212 between the second electromagnet 2 and the fourth electromagnet 4 is contracted, so that the guide wire is bent in an "S" shape.

[0040] In order to prevent the electromagnet from attracting the mandrel, a magnetic shielding material layer (not shown) is provided on the side of the hose 211 close to the mandrel, or one or more magnetic shielding material layers are provided on the surface of the mandrel 100. In one or more embodiments, one or more magnetic shielding materials are sprayed onto the inner surface of the hose 211 or the surface of the mandrel 100, with a thickness of 1 / 1000 inch to 1 inch. The thickness of the magnetic shielding material layer may depend on the strength of the electromagnetic field.

[0041] In another embodiment of the utility model, the surface of the sheath 200 is coated with an electrical insulation coating 240. This is to prevent the current when the electromagnet 213 is energized from causing damage to the human body and improve the safety of interventional treatment. Preferably, the electrical insulation coating 240 is a polytetrafluoroethylene (PTFE) coating. The polytetrafluoroethylene coating has the advantages of low water absorption, surface non-stickiness, corrosion resistance, high temperature resistance, excellent electrical insulation, high strength, light weight, good flexibility, and long life. It can reduce the friction of the surface, improve the tracking and passability of the guide wire, and thus improve the efficiency of interventional treatment.

[0042] The end 300 is an X-ray visible end, which is visible under X-ray irradiation, and can effectively track the movement trajectory of the guide wire body, making it convenient to observe the intervention position during interventional treatment, and providing better controllability.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An adjustable curved guide wire, characterized in that: It includes a core shaft, a sheath and an end. The sheath is sleeved on the outside of the core shaft. A plurality of hoses and a plurality of bellows are arranged at the distal end of the sheath. The hoses and the bellows are arranged alternately. An electromagnet is embedded in the same axial position of each of the hoses. The electromagnet is connected to an external power supply device through a wire. The magnetic poles of two adjacent electromagnets are the same and repel each other, and the magnetic poles of two adjacent electromagnets are different and attract each other. The movement of the electromagnet promotes the compression or extension of the hose, thereby deflecting the guide wire. The distal ends of the sheath and the core shaft are connected to the end.

2. The adjustable curved guide wire according to claim 1, characterized in that: It also includes a magnetic shielding material layer, wherein the magnetic shielding material layer is disposed at a position including at least one of the following: The magnetic shielding material layer covers the inner surface of the hose; The magnetic shielding material layer is disposed around the circumference of the core shaft.

3. The adjustable curved guide wire according to claim 1, characterized in that: A plurality of the electromagnets are arranged in each of the hoses, and the electromagnets in the same hose are symmetrically arranged around the core axis.

4. The adjustable curved guide wire according to claim 3, characterized in that: The surface of the sheath is coated with an electrical insulation coating.

5. The adjustable curved guide wire according to claim 4, characterized in that: The electrical insulation coating is a polytetrafluoroethylene coating.

6. The adjustable curved guidewire according to any one of claims 1 to 5, characterized in that: The sheath includes a bending section, a flexible support section and a rigid support section; the hose and the bellows constitute the bending section; the distal end of the flexible support section is connected to the proximal end of the bending section; the distal end of the rigid support section is connected to the proximal end of the flexible support section.

7. The adjustable curved guide wire according to claim 6, characterized in that: The bending angle of the sheath is 0-50°.

8. The adjustable curved guide wire according to claim 6, characterized in that: The flexible supporting section is a spring.

9. The adjustable curved guidewire according to any one of claims 1 to 5, characterized in that: The core shaft comprises a distal section, a middle section and a proximal section which are connected in sequence, and the diameters of the distal section, the middle section and the proximal section decrease in sequence.

10. The adjustable curved guide wire according to any one of claims 1 to 5, characterized in that: The end is an X-ray visible end.

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