Guide wire

Abstract

The invention provides a guide wire which comprises a core wire, a winding wire wound on the core wire and an insulating part wrapping the winding wire, the far end of the core wire is provided with an electrocoagulation area, the core wire further comprises a channel, a liquid injection opening and a plurality of spray holes, the liquid injection opening is formed in the near end of the core wire, the spray holes are formed in the far end of the core wire, and the liquid injection opening is communicated with the channel. One end of the channel is communicated with the liquid injection opening, and the other end of the channel is communicated with the spray hole. The channel is arranged in the core wire, one end of the channel is communicated with the liquid injection opening in the near end of the core wire, and the other end of the channel is communicated with the spray hole in the far end of the core wire, so that liquid can be injected through the liquid injection opening and then is sprayed out from the spray hole after penetrating through the channel, and the temperature of an electrocoagulation area is effectively reduced; the temperature of an electrocoagulation area is prevented from being too high to damage tumor walls, the pain of a patient is reduced, the safety of an operation is improved, meanwhile, thrombus can be prevented from being adhered to the far end of the core wire, the core wire can be conveniently withdrawn after the operation, and electrocoagulation thrombus displacement is avoided.

Description

Technical Field

[0001] The invention relates to the field of medical technology, and in particular to a guide wire. Background Art

[0002] As people's dietary structure changes, various diseases have gradually increased, including hemangiomas, especially intracranial aneurysms. Hemangiomas are mainly hemangioma-like protrusions caused by abnormal expansion of local blood vessels. Hemangioma rupture often causes serious consequences. For example, intracranial aneurysm rupture is the leading cause of subarachnoid hemorrhage, with high mortality and disability rates. With the development of interventional devices and technologies, interventional treatment has gradually become the first-line method for the treatment of hemangiomas.

[0003] The existing interventional treatment method mainly involves filling the tumor cavity with embolic materials such as coils, and then generating thrombi in the tumor cavity to achieve the purpose of treatment. However, for some hemangiomas that cannot be filled with embolic materials such as coils, an electrocoagulation guidewire treatment method can be used, that is, the distal end of the electrocoagulation guidewire is extended into the tumor cavity of the hemangioma, and then the electrocoagulation guidewire is energized, and the distal end of the electrocoagulation guidewire absorbs negative ions in the blood to form thrombi, thereby achieving the purpose of treating the hemangioma. However, during treatment, the distal end of the existing electrocoagulation guidewire will generate a higher temperature, which is easy to damage the hemangioma wall, increase the patient's surgical risk, and cause unnecessary pain to the patient. Summary of the invention

[0004] In order to overcome the above technical problems, the present invention provides a guide wire that can effectively cool the distal end.

[0005] As conceived above, the technical solution adopted by the present invention is:

[0006] A guide wire comprises a core wire, a winding wire wound on the core wire and an insulating member covering the winding wire, wherein an electrocoagulation area is provided at the distal end of the core wire, and the core wire further comprises a channel, an injection port and a plurality of spray holes, wherein the injection port is arranged at the proximal end of the core wire, the spray holes are arranged at the distal end of the core wire, one end of the channel is connected to the injection port, and the other end of the channel is connected to the spray holes.

[0007] Preferably, the electrocoagulation area is provided with the spray hole; and / or the distal end of the core wire is provided with a spray head, and the spray head is provided with the spray hole.

[0008] Preferably, the wire winding includes a first wire winding portion, the first wire winding portion is wound around the electrocoagulation area, and the first wire winding portion is a developing wire winding.

[0009] Preferably, the length of the first wire winding portion is equal to the length of the electrocoagulation area.

[0010] Preferably, the wire winding also includes a second wire winding portion, the second wire winding portion is a non-developing wire winding portion, one end of the first wire winding portion abuts against the nozzle and the other end is fixedly connected to one end of the second wire winding portion, and the second wire winding portion is fixedly connected to the core wire.

[0011] Preferably, an outer core wire is sheathed on the outer circumferential surface of the core wire, and a distal end of the outer core wire abuts against a proximal end of the second wire winding portion.

[0012] Preferably, a plurality of welding points are provided between the outer core wire and the core wire, and the distance between adjacent welding points is h, wherein 5 mm ≤ h ≤ 10 mm.

[0013] Preferably, the insulating member includes an insulating coating covering the second winding portion and a hydrophilic coating covering the insulating coating.

[0014] Preferably, the core wire comprises a first portion located at the distal end and a second portion located at the proximal end, the first portion is fixedly connected to the second portion, and an elastic modulus of the first portion is smaller than an elastic modulus of the second portion.

[0015] Preferably, the spray hole is arranged in the first part, the liquid injection port is arranged in the second part, the first wire winding part and the second wire winding part are wound around the first part, and the outer core wire is sleeved on the outside of the first part.

[0016] The present invention has at least the following beneficial effects:

[0017] The guide wire of the present invention has a channel set in the core wire, one end of the channel is connected to the injection port at the proximal end of the core wire and the other end is connected to the spray hole at the distal end of the core wire, so that liquid can be injected through the injection port and then sprayed out from the spray hole after passing through the channel, thereby effectively reducing the temperature of the electrocoagulation area, preventing the excessive temperature in the electrocoagulation area from damaging the tumor wall, reducing the patient's pain, and improving the safety of the operation. At the same time, it can prevent the thrombus from adhering to the distal end of the core wire, making it convenient to withdraw the core wire after surgery to avoid causing the electrocoagulation thrombus to shift. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a cross-sectional view of a partial structure of a guide wire provided by the present invention;

[0019] Figure 2 yes Figure 1 A partial enlarged view of the A portion of the guide wire provided by the present invention is shown;

[0020] Figure 3 yes Figure 1 A partial enlarged view of the B portion of the guide wire provided by the present invention is shown;

[0021] Figure 4 yes Figure 1A cross-sectional view of a core wire and an outer core wire of a guide wire provided by the present invention is shown;

[0022] Figure 5 yes Figure 4 The left side view of the nozzle of the guide wire provided by the present invention is shown;

[0023] Figure 6 yes Figure 1 A cross-sectional view of the wire winding of the guide wire provided by the present invention is shown;

[0024] Figure 7 yes Figure 1 A cross-sectional view of the core wire, outer core wire and winding wire of the guide wire provided by the present invention is shown;

[0025] Figure 8 It is a schematic structural diagram of the guide wire provided by the present invention.

[0026] Explanation of the accompanying drawings: 100-guide wire; 1-core wire; 11-first part; 12-second part; 13-channel; 14-nozzle; 15-electrocoagulation area; 16-nozzle hole; 17-injection port; 2-winding wire; 21-first winding part; 22-second winding part; 3-insulating part; 31-insulating coating; 32-hydrophilic coating; 4-outer core wire; 41-first end; 42-second end; 43-welding point; 5-injector; 6-connecting tube; 7-power supply; 8-blood vessel; 81-hemangioma. DETAILED DESCRIPTION

[0027] The guidewire provided by the present invention is described clearly and completely below in conjunction with the accompanying drawings. It is to be understood that the described embodiments are only partial embodiments of the present invention, not all embodiments, and the present invention can be implemented in many other ways different from those described herein.

[0028] Unless otherwise defined, all technical terms and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs. The terms used in this specification are only for describing specific embodiments and are not intended to limit the present invention.

[0029] It should be noted that all directional indications in the embodiments of this specification are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this specification, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] The technical solutions of the various embodiments of the present invention may be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in the field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] In this specification, the axial direction refers to the direction parallel to the line connecting the distal center and the proximal center of the component; the radial direction refers to the direction perpendicular to the axial direction.

[0033] like Figures 1 to 8 As shown, in one embodiment, the guide wire of the present invention includes a core wire 1, a wire wrap 2 wound on the core wire 1 and an insulating member 3 covering the wire wrap 2, the distal end of the core wire 1 is provided with an electrocoagulation area 15, the core wire 1 also includes a channel 13, an injection port 17 and a plurality of spray holes 16, the injection port 17 is arranged at the proximal end of the core wire 1, the spray hole 16 is arranged at the distal end of the core wire 1, one end of the channel 13 is connected to the injection port 17, and the other end of the channel 13 is connected to the spray hole 16.

[0034] Preferably, the core wire 1 includes a proximal end and a distal end, wherein the proximal end of the core wire 1 is an end close to the operator, and the distal end of the core wire 1 is an end away from the operator. Figure 1 As shown, the proximal end of the core wire 1 is the right end, and the distal end of the core wire 1 is the left end. The electrocoagulation region 15 at the distal end of the core wire 1 is extended into the hemangioma 81, and when the proximal end of the core wire 1 is connected to the power source 7, the negative ions in the hemangioma 81 are adsorbed by the electrocoagulation region 15 to form a thrombus, thereby achieving the purpose of treating the hemangioma 81. Figure 8 shown.

[0035] More preferably, the winding wire 2 is wound around the distal end of the core wire 1, and the winding wire 2 is in a spring shape. In other embodiments, the winding wire 2 may also be in other geometric shapes, which are not specifically limited here.

[0036] More preferably, the insulating member 3 is sleeved on the outer surface of the winding wire 2. The insulating member 3 is mainly used to insulate the winding wire 2 and the core wire 1 to prevent contact with blood to form thrombi, causing adverse events such as embolism. In other embodiments, the insulating member 3 can also be sleeved on a portion of the proximal end of the core wire 1, thereby achieving insulation of the portion of the proximal end of the core wire 1 to ensure the safety of the operation.

[0037] Furthermore, the electrocoagulation region 15 is disposed at the distal end of the core wire 1, such as Figure 1 and Figure 2 As shown, the core wire 1 is made of a conductive material to facilitate current transmission. In some embodiments, the surface of the core wire 1 is provided with an insulating coating, thereby insulating the core wire 1 and preventing the core wire 1 from contacting the blood and causing thrombus formation when the power is turned on. The electrocoagulation area 15 is an area at the distal end of the core wire 1 where the insulating coating is not provided, so that the core wire 1 can directly contact the blood in the hemangioma 81 to generate a thrombus in the hemangioma 81. Preferably, the length of the electrocoagulation area 15 is L, where 1mm≤L≤5mm, so as to adapt to the treatment of most hemangiomas 81. When L is too large, the electrocoagulation area 15 will be located outside the hemangioma 81, which may cause blockage of the tumor-bearing artery, etc. If L is too small, the efficiency of electrocoagulation will be affected. Of course, the specific length value of the electrocoagulation area 15 can be selected and set as needed, and is not specifically limited here.

[0038] Furthermore, the injection port 17 is arranged at the proximal end of the core wire 1, such as Figure 8 As shown, the injection port 17 is used to connect with the injection structure so as to inject cooling liquid, such as non-conductive liquid such as glucose, through the injection port 17. Preferably, the injection port 17 is arranged on the end face of the proximal end of the core wire 1. There are a plurality of spray holes 16, such as one, two or more. The specific number of the spray holes 16 can be selected and set as needed, and is not specifically limited here. Furthermore, the spray hole 16 is arranged at the distal end of the core wire 1. The setting of the spray hole 16 is used to spray liquid to cool the electrocoagulation area 15, so as to prevent the distal end of the core wire 1 from being too high during thrombus formation and causing damage to the tumor wall, thereby improving the safety of the operation, and preventing the distal end of the core wire 1 from adhering to the thrombus during the electrocoagulation process, which is beneficial to the separation of the core wire 1 from the thrombus after surgery and ensures the safety of the operation.

[0039] It should be noted that the aperture of the above-mentioned nozzle 16 is preferably 0.01mm to 0.05mm, that is, any value between 0.01mm and 0.05mm, for example, it can be 0.01mm, 0.02mm, 0.03mm, 0.04mm, 0.05mm, etc. The user can choose to set it according to needs, and no specific limitation is made here.

[0040] Furthermore, one end of the channel 13 is connected to the liquid injection port 17, and the other end of the channel 13 is connected to the spray hole 16, so that the cooling liquid flows from the liquid injection port 17 to the spray hole 16 and sprays out, thereby cooling the electrocoagulation area 15 and reducing the temperature of the electrocoagulation area 15. Preferably, the channel 13 is arranged inside the core wire 1 and extends along the extension direction of the core wire 1.

[0041] In one embodiment, the electrocoagulation area 15 is provided with the spray hole 16 ; and / or, the distal end of the core wire 1 is provided with a spray head 14 , and the spray head 14 is provided with the spray hole 16 .

[0042] Preferably, the electrocoagulation area 15 is arranged on the outer peripheral surface of the distal end of the core wire 1, such as Figure 2 As shown, one or more spray holes 16 may be provided, and the spray holes 16 are provided on the electrocoagulation region 15, so that the cooling liquid is directly sprayed from the spray holes 16 of the electrocoagulation region 15, and the cooling efficiency is high and the effect is significant. Further, the plurality of spray holes 16 are arranged equidistantly on the electrocoagulation region 15, such as equidistantly arranged in the axial direction of the core wire 1, or equidistantly arranged in the circumferential direction of the core wire 1, etc. The user may select and set according to the needs, and no specific limitation is made here.

[0043] More preferably, the nozzle 14 is arranged on the end face of the distal end of the core wire 1, that is, the distal end of the core wire 1, and the electrocoagulation area 15 and the nozzle 14 are arranged in sequence in the axial direction of the core wire 1. The nozzle 14 can be a hemispherical body, and the diameter of the nozzle 14 is 0.2 mm to 0.3 mm, that is, any value between 0.2 mm and 0.3 mm, for example, it can be 0.2 mm, 0.21 mm, 0.22 mm, 0.23 mm, 0.24 mm, 0.25 mm, 0.26 mm, 0.27 mm, 0.28 mm, 0.29 mm, 0.3 mm, etc. The user can select and set it as needed, and no specific limitation is made here. In other embodiments, the nozzle 14 can also be other geometric bodies, etc., and the user can select and set it as needed, and no specific limitation is made here.

[0044] Preferably, the diameter of the nozzle 14 is larger than the diameter of the distal end of the core wire 1, so as to facilitate fixed connection with the end of the winding wire 2. The outer surface of the nozzle 14 is provided with an insulating coating, thereby playing an insulating role and preventing contact with blood during electrocoagulation to cause thrombosis.

[0045] Furthermore, the nozzle 14 is provided with a spray hole 16 , and the spray hole 16 is arranged on the curved surface of the nozzle 14 , so as to spray the coolant on the curved surface area of ​​the nozzle 14 to cool it down.

[0046] Furthermore, if Figure 5 As shown, there are five spray holes 16 on the spray head 14, wherein four spray holes 16 are arranged equidistantly around one spray hole 16, so that the spraying of liquid is more uniform, and thus the cooling effect is also more uniform.

[0047] In one embodiment, the wire winding 2 includes a first wire winding portion 21 , the first wire winding portion 21 is wound around the electrocoagulation area 15 , and the first wire winding portion 21 is a developing wire winding.

[0048] Preferably, the wire diameter of the first wire winding portion 21 is 0.02mm to 0.06mm, that is, any value between 0.02mm and 0.06mm can be selected, such as 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm, etc., and the user can choose to set it according to needs, and no specific limitation is made here; further, the outer diameter of the first wire winding portion 21 is 0.2mm to 0.3mm, that is, any value between 0.2mm and 0.3mm can be selected, such as 0.2mm, 0.21mm, 0.22mm, 0.23mm, 0.24mm, 0.25mm, 0.26mm, 0.27mm, 0.28mm, 0.29mm, 0.3mm, etc., and the user can choose to set it according to needs, and no specific limitation is made here.

[0049] More preferably, the first wire wrapping portion 21 is located in the distal region of the wire wrapping 2, and the distal end of the first wire wrapping portion 21 abuts against and is fixedly connected to the nozzle 14. Preferably, the distal end of the first wire wrapping portion 21 is fixed to the nozzle 14 by laser welding, thereby avoiding the use of soldering, bonding and other connection methods to cause the tin or glue to melt during the electrocoagulation process, resulting in the separation of the first wire wrapping portion 21 from the core wire 1, thereby ensuring that the electrocoagulation operation is performed safely and effectively.

[0050] Preferably, the first wire winding portion 21 is a developing wire winding, so as to achieve visibility of the distal end, and because the first wire winding portion 21 is wound around the electrocoagulation area 15, it is convenient for the doctor to identify the electrocoagulation area 15 during the operation. Furthermore, the first wire winding portion 21 is a platinum tungsten wire winding, which can not only improve the visibility of the distal end, but also improve the flexibility of the distal end, so as to facilitate its movement into the hemangioma 81.

[0051] In one embodiment, the length W of the first wire winding portion 21 is equal to the length L of the electrocoagulation area 15. Figure 2 and Figure 6 shown.

[0052] Preferably, the length W of the first wire winding portion 21 is equal to the length L of the electrocoagulation area 15, and the end face of the distal end of the first wire winding portion 21 is coplanar with the distal end of the electrocoagulation area 15, and the end face of the proximal end of the first wire winding portion 21 is coplanar with the proximal end of the electrocoagulation area 15, thereby facilitating the doctor to identify the electrocoagulation area 15 during the operation and facilitating the accurate movement of the electrocoagulation area 15 into the hemangioma 81, thereby improving the accuracy and safety of the operation.

[0053] In one embodiment, the wire winding 2 also includes a second wire winding portion 22, the second wire winding portion 22 is a non-developing wire winding, one end of the first wire winding portion 21 abuts against the nozzle 14 and the other end is fixedly connected to one end of the second wire winding portion 22, and the second wire winding portion 22 is fixedly connected to the core wire 1.

[0054] Preferably, the second wire winding portion 22 is wound on the outer surface of the core wire 1, and the second wire winding portion 22 is located at the proximal end of the wire winding 2. The wire diameter of the second wire winding portion 22 is 0.02mm to 0.06mm, that is, any value between 0.02mm and 0.06mm, such as 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm, etc. The user can choose to set it according to needs, and no specific limitation is made here. Further, the outer diameter of the second wire winding portion 22 is 0.2mm to 0.3mm, that is, any value between 0.2mm and 0.3mm, such as 0.2mm, 0.21mm, 0.22mm, 0.23mm, 0.24mm, 0.25mm, 0.26mm, 0.27mm, 0.28mm, 0.29mm, 0.3mm, etc. The user can choose to set it according to needs, and no specific limitation is made here.

[0055] More preferably, the second wire winding portion 22 is a non-developing wire winding, so as to prevent interference with identifying the electrocoagulation area 15 through the first wire winding portion 21. Preferably, the second wire winding portion 22 is a stainless steel wire winding, so as to improve the bending performance of the core wire 1.

[0056] More preferably, the first wire winding portion 21 is located between the nozzle 14 and the second wire winding portion 22, one end of the first wire winding portion 21 abuts against the nozzle 14 and is fixedly connected thereto, such as by laser welding, and the other end of the second wire winding portion 21 is fixedly connected to one end of the second wire winding portion 22, thereby achieving a stable connection between the two.

[0057] Furthermore, the second wire winding portion 22 is fixedly connected to the core wire 1. In order to ensure the transmission of current, the second wire winding portion 22 and the core wire 1 are fixedly connected by soldering, and the soldering area is increased at the same time, thereby reducing the overall resistance and improving the conductivity, and preventing the connection between the two from melting due to excessive temperature caused by excessive resistance during the power-on process. Specifically, a plurality of soldering points (not shown) can be set between the second wire winding portion 22 and the core wire 2, which, on the one hand, increase the torque transmission between the second wire winding portion 22 and the core wire 1 and improve the torque control performance of the core wire 1, and on the other hand, improve the conductivity of the core wire 1 and the second wire winding portion 22, and reduce the overall resistance.

[0058] In one embodiment, the outer circumferential surface of the core wire 1 is sheathed with an outer core wire 4 , and the distal end of the outer core wire 4 abuts against the proximal end of the second wire winding portion 22 .

[0059] Preferably, the outer diameter of the outer core wire 4 is any value between 0.28mm and 0.4mm, for example, it can be 0.28mm, 0.29mm, 0.3mm, 0.31mm, 0.32mm, 0.33mm, 0.34mm, 0.35mm, 0.36mm, 0.37mm, 0.38mm, 0.39mm, 0.4mm, etc. The user can choose the setting according to needs, and no specific limitation is made here.

[0060] More preferably, the inner diameter of the outer core wire 4 is equal to the outer diameter of the core wire 1. By putting the outer core wire 4 on the core wire 1, a step is formed at the first end 41 of the outer core wire 4 close to the winding wire 2, and the first end 41 abuts against the proximal end of the second winding wire part 22 and is flush with it.

[0061] More preferably, the outer core wire 4 is fixedly connected to the core wire 1, and the assembly method of the wire wrap 2 and the outer core wire 4 is as follows: first, the first wire wrap portion 21 and the second wire wrap portion 22 are put on the distal end of the core wire 1, and then the outer core wire 4 is put on the distal end of the core wire 1, the distal end of the first wire wrap portion 21 abuts against the nozzle 14 and is laser welded and fixed thereto, and the first end 41 of the outer core wire 4 abuts against the proximal end of the second wire wrap portion 22, where the first end 41 of the outer core wire 4 is the distal end of the outer core wire 4, and the outer core wire 4 is fixedly connected to the core wire 1, and the wire wrap 2 is constrained and fixed by the nozzle 14 and the outer core wire 4 to prevent it from untwisting.

[0062] In one embodiment, a plurality of welding points 43 are provided between the outer core wire 4 and the core wire 1, and the distance between adjacent welding points 43 is h, wherein 5 mm ≤ h ≤ 10 mm. Figure 7 shown.

[0063] Preferably, the outer core wire 4 is fixed to the core wire 1 by welding, such as Figure 7 As shown, a plurality of welding points 43 are welded between the outer core wire 4 and the core wire 1 , and are sequentially arranged at intervals along the extending direction of the core wire 1 , thereby enhancing the structural stability between the outer core wire 4 and the core wire 1 .

[0064] More preferably, the distance h between adjacent welding points 43 is any value between 5 mm and 10 mm, such as 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, etc. The user can select and set it as needed, and no specific limitation is made here. By limiting the above range, the outer core wire 4 can better transmit torque and enhance the torque control.

[0065] In one embodiment, the insulating member 3 includes an insulating coating 31 covering the second winding portion 22 and a hydrophilic coating 32 covering the insulating coating 31. Figures 1 to 3 and Figure 8 shown.

[0066] Preferably, the insulating coating 31 is formed on the wire winding 2, specifically: the insulating coating 31 is formed on the second wire winding portion 22, and there is no insulating coating 31 on the first wire winding portion 21. The electrocoagulation area 15 is in full contact with the blood to facilitate the formation of a thrombus, thereby achieving the purpose of treating hemangioma.

[0067] More preferably, the insulating coating 31 is made of materials such as TPU (thermoplastic polyurethane rubber), PTFE (polytetrafluoroethylene), and PET (polyethylene terephthalate), so as to play an effective insulating role, prevent the second winding wire portion 22 from contacting blood to produce blood clots and cause adverse events such as embolism, thereby reducing surgical risks.

[0068] More preferably, in some embodiments, the insulating coating 31 is also coated on the outer surface of the outer core wire 4, so that on the one hand, the outer core wire 4 is insulated from the blood to avoid the formation of thrombus in the non-electrocoagulation area, causing adverse surgical events such as embolism, and improving the safety of the operation; on the other hand, the friction resistance with the microcatheter is reduced.

[0069] Further preferably, a hydrophilic coating 32 is formed on the outer surface of the insulating coating 31, for example, it is made of materials such as polyacrylamide and polyvinyl pyrrolidone. The hydrophilic coating 32 is used to increase the overall smoothness of the permeability, thereby facilitating smooth passage through the blood vessel 8, allowing the electrocoagulation area 15 to enter the hemangioma 81, thereby increasing the safety of the operation.

[0070] In one embodiment, the core wire 1 includes a first portion 11 located at the distal end and a second portion 12 located at the proximal end, the first portion 11 is fixedly connected to the second portion 12 , and the elastic modulus of the first portion 11 is smaller than that of the second portion 12 .

[0071] Preferably, the proximal end of the first part 11 and the distal end of the second part 12 are welded to achieve a stable connection between the two. Furthermore, the first part 11 is preferably made of materials such as nickel titanium, which has superelasticity, improves the bending flexibility of the distal end, and facilitates its insertion into the hemangioma 81; the second part 12 is preferably made of materials such as stainless steel, which has a large elastic modulus and is relatively hard, thereby ensuring the support of the proximal end and the transmission performance of the driving force, and ensuring the stability of the operation. Furthermore, the second end 42 of the outer core wire 4 is fixedly connected to the distal end of the second part 12, which is beneficial to enhancing the stability of the overall structure. The second end 42 of the outer core wire 4 here is the proximal end of the outer core wire 4. Figure 7 shown.

[0072] More preferably, the channel 13 penetrates through the interior of the first portion 11 and the second portion 12 , so as to facilitate the cooling liquid to pass through the first portion 11 and the second portion 12 , so as to transport the cooling liquid to the electrocoagulation area 15 .

[0073] More preferably, the outer diameter of the second part 12 is any value between 0.3mm and 0.4mm, for example, it can be 0.3mm, 0.31mm, 0.32mm, 0.33mm, 0.34mm, 0.35mm, 0.36mm, 0.37mm, 0.38mm, 0.39mm, 0.4mm, etc. The user can choose the setting according to needs, and no specific limitation is made here. Further, the diameter of the channel 13 in the second part 12 is any value between 0.01mm and 0.2mm, such as 0.01mm, 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.2mm, etc., and the user can select and set it as needed, and no specific limitation is made here. At the same time, the diameter of the channel 13 in the first part 11 is any value between 0.01 and 0.05mm, such as 0.01mm, 0.02mm, 0.03mm, 0.04mm, 0.05mm, etc., and the user can select and set it as needed, and no specific limitation is made here. Through the above-mentioned limitation, it is more conducive to injecting cooling liquid.

[0074] Furthermore, the insulating coating 31 is coated on the outer surface of the second part 12 , which improves its smoothness on the one hand and plays an insulating role on the other hand. In addition, the outer surface of the proximal end of the second part 12 is a non-coated area for electrical connection with the power supply 7 .

[0075] Furthermore, the first part 11 is designed with multiple gradient diameter changes, and the distal end of the first part 11 has the smallest diameter and is any value between 0.05 mm and 0.2 mm, such as 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm, 0.2 mm, etc. The user can select and set it according to needs, and no specific limitation is made here. It can make the distal end of the first part 11 have good softness, and at the same time, the proximal end of the first part 11 has the largest diameter. The first part 11 is preferably formed by processing the nickel-titanium tube with a grinder.

[0076] Furthermore, the second portion 12 is designed to be of equal diameter, so that the second portion 12 has better support and pushing properties, making it easier to push the electrocoagulation area 15 into the hemangioma 81 .

[0077] In one embodiment, the spray hole 16 is arranged in the first part 11, the liquid injection port 17 is arranged in the second part 12, the first wire winding portion 21 and the second wire winding portion 22 are wound around the distal end of the first part 11, and the outer core wire 4 is sleeved on the proximal end of the outside of the first part 11.

[0078] Preferably, the spray hole 16 is disposed at the distal end of the first portion 11 to inject cooling liquid into the distal end to cool the electrocoagulation process and prevent the distal end temperature from being too high and damaging the aneurysm wall.

[0079] More preferably, the liquid injection port 17 is disposed at the proximal end of the second portion 12 to facilitate connection with the liquid injection structure and to facilitate delivery of the coolant into the channel 13 .

[0080] More preferably, the first wire winding portion 21 is wound on the outer surface of the first part 11, and the outer diameter of the first part 11 is smaller than the inner diameter of the first wire winding portion 21, so as to facilitate the cooling liquid to be sprayed out from the spray hole 16 of the electrocoagulation area 15 to achieve the purpose of quickly cooling the electrocoagulation area.

[0081] Furthermore, the second wire winding portion 22 and the outer core wire 4 are sleeved on the first portion 11 and fixedly connected thereto.

[0082] In one embodiment, the guide wire further includes an injector 5, a connecting tube 6 and a power source 7. Figure 8 shown.

[0083] Preferably, the injector 5 stores coolant, and the coolant inside can be injected into the channel 13. Specifically, the injector 5 can be a syringe, etc., which only needs to be able to achieve injection, and is not specifically limited here.

[0084] More preferably, one end of the connecting tube 6 is connected to the liquid outlet of the injector 5 , and the other end of the connecting tube 6 is connected to the injection port 17 , so that the injector 5 can inject the coolant inside into the channel 13 through the connecting tube 6 .

[0085] More preferably, the positive electrode of the power supply 7 is electrically connected to the non-coated area proximal to the second part 12, and the negative electrode of the power supply 7 is electrically connected to the blood, so that when the electrocoagulation area 15 extends into the hemangioma 81, a thrombus can be generated around the electrocoagulation area 15.

[0086] It should be noted that the above-mentioned proximal ends are the ends close to the operator, and the above-mentioned distal ends are the ends far away from the operator.

[0087] The following further describes the use of the guide wire of the present invention:

[0088] like Figure 8As shown, firstly, the distal end of the core wire 1 is extended into the hemangioma 81, and the electrocoagulation area 15 is completely extended into the hemangioma 81. At this time, the position of the first winding wire portion 21 can be observed by DSA (subtraction angiography), and then the specific position of the electrocoagulation area 15 can be observed to determine whether it is completely in the hemangioma 81, and to avoid the electrocoagulation area 15 from touching the wall of the tumor. After the proximal end of the guide wire is connected to the power supply, a coolant, such as a non-conductive liquid such as glucose, is injected through the injector 5. The coolant enters the channel 13 through the connecting tube 6, and then is sprayed out through the spray hole 16 of the electrocoagulation area 15 and the spray hole 16 on the nozzle 14, thereby reducing the temperature around the electrocoagulation area 15 and ensuring the safety of the electrocoagulation embolization operation. At the same time, since the glucose solution is non-conductive, the power loss during the electrocoagulation process is reduced, and the doctor is also prevented from being electroshocked during the operation. Therefore, the present invention not only facilitates accurate determination of the position of the electrocoagulation area 15 during the electrocoagulation surgery to avoid touching the tumor wall, thus facilitating the operation of the clinician, but also allows cooling liquid to be sprayed around the electrocoagulation area 15 to reduce the temperature, thereby improving the safety of the surgery.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A guide wire, comprising a core wire (1), a wire wrap (2) wound around the core wire (1), and an insulating member (3) covering the wire wrap (2), wherein an electrocoagulation region (15) is provided at the distal end of the core wire (1), characterized in that: The core wire (1) further comprises a channel (13), a liquid injection port (17), and a plurality of spray holes (16); the liquid injection port (17) is arranged at the proximal end of the core wire (1), and the spray holes (16) are arranged at the distal end of the core wire (1); one end of the channel (13) is connected to the liquid injection port (17), and the other end of the channel (13) is connected to the spray holes (16).

2. The guide wire according to claim 1, characterized in that The electrocoagulation area (15) is provided with the spray hole (16); and / or the distal end of the core wire (1) is provided with a spray head (14), and the spray head (14) is provided with the spray hole (16).

3. The guide wire according to claim 1, characterized in that The wire winding (2) comprises a first wire winding portion (21), wherein the first wire winding portion (21) is wound around the electrocoagulation area (15), and the first wire winding portion (21) is a developing wire winding.

4. The guide wire according to claim 3, characterized in that The length of the first wire winding portion (21) is equal to the length of the electrocoagulation area (15).

5. The guide wire according to claim 4, characterized in that The wire winding (2) further comprises a second wire winding portion (22), the second wire winding portion (22) being a non-developing wire winding portion, one end of the first wire winding portion (21) being in contact with the nozzle (14) and the other end being fixedly connected to one end of the second wire winding portion (22), and the second wire winding portion (22) being fixedly connected to the core wire (1).

6. The guide wire according to claim 5, characterized in that The outer peripheral surface of the core wire (1) is sheathed with an outer core wire (4), and the distal end of the outer core wire (4) abuts against the proximal end of the second wire winding portion (22).

7. The guide wire according to claim 6, characterized in that A plurality of welding points (43) are provided between the outer core wire (4) and the core wire (1), and the distance between adjacent welding points (43) is h, wherein 5 mm ≤ h ≤ 10 mm.

8. The guide wire according to claim 7, characterized in that The insulating member (3) comprises an insulating coating (31) covering the second wire winding portion (22) and a hydrophilic coating (32) covering the insulating coating (31).

9. The guide wire according to claim 8, characterized in that The core wire (1) comprises a first part (11) located at the distal end and a second part (12) located at the proximal end, the first part (11) and the second part (12) are fixedly connected, and the elastic modulus of the first part (11) is smaller than the elastic modulus of the second part (12).

10. The guide wire according to claim 9, characterized in that The spray hole (16) is arranged on the first part (11), the liquid injection port (17) is arranged on the second part (12), the first wire winding part (21) and the second wire winding part (22) are wound around the first part (11), and the outer core wire (4) is sleeved on the outside of the first part (11).

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