A guidewire guiding device for establishing intervascular access

Abstract

This invention relates to a guidewire guiding device for establishing intervascular access, belonging to the field of medical device technology. It solves the problem in existing technologies where the guidewire needs to traverse two veins or arteries and be inserted into a sheath to establish a connection between two vascular puncture sites, resulting in high operational difficulty. This invention includes a first guiding unit and a second guiding unit. The first guiding unit includes a first guidewire and a first connecting mechanism, and the second guiding unit includes a second guidewire and a second connecting mechanism. The first connecting mechanism and the second connecting mechanism can be connected, thereby connecting the first guiding unit and the second guiding unit to each other. The guiding device of this invention eliminates the need to manually insert the guidewire into the catheter / sheath lumen within the blood vessel, simplifying operation, shortening the procedure time, and increasing the success rate.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically to a guidewire guiding device for establishing intervascular access. Background Technology

[0002] Interventional surgery, a minimally invasive surgical procedure guided by medical imaging equipment and using specialized catheters, guidewires, and other interventional devices to diagnose and treat internal conditions, has advantages such as minimal trauma, rapid recovery, and fewer complications. It has now become one of the three major medical disciplines alongside internal medicine and surgery.

[0003] Currently, with advancements in interventional surgical techniques and equipment, some cases that were previously difficult to treat with intervention can now be addressed through interventional surgery. However, some special cases still require experienced surgeons to spend a significant amount of time during the procedure to achieve the desired therapeutic outcome.

[0004] For aortic dissection involving the left subclavian artery, a pathway needs to be established from the femoral artery to the left brachial artery; similarly, for patients with iliac artery occlusion, a pathway needs to be established from one femoral artery to the contralateral femoral artery; another example is iliofemoral artery occlusion, which requires establishing a pathway from one femoral artery to the contralateral popliteal artery or even the infrakal artery puncture point; and yet another is for patients with inferior vena cava filter implantation followed by filter wall apposition, requiring a pathway from the femoral vein to the jugular vein. All of these pathways require experienced surgeons to superselectively guide the guidewire into a catheter with a diameter of only 2-3 mm. Specifically, the pathway involves manipulating the guidewire to enter the smaller lumen (catheter / sheath) within the larger lumen (vascular lumen) and exiting it externally to establish guidewire guidance for subsequent procedures. This technique is clinically known as the "fishing" technique, aptly describing its difficulty. The guidewire needs to connect two vascular puncture points and be inserted into the sheath, making the procedure challenging, time-consuming, and in some patients, the pathway cannot be successfully established, leading to surgical failure. Summary of the Invention

[0005] To address the aforementioned shortcomings of existing technologies, this invention provides a guidewire guiding device for establishing intervascular access, which solves the problem that in existing technologies, the guidewire needs to pass through two blood vessels and be inserted into a sheath to establish a connection between two vascular puncture sites, which is difficult to operate and may lead to surgical failure.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows:

[0007] The present invention provides a guidewire guiding device for establishing intervascular access, comprising a first guiding unit and a second guiding unit. The first guiding unit includes a first guidewire and a first connecting mechanism, and the second guiding unit includes a second guidewire and a second connecting mechanism. The first connecting mechanism is disposed at the end of the first guidewire, and the second connecting mechanism is disposed at the end of the second guidewire. The first connecting mechanism and the second connecting mechanism can be connected to each other, thereby connecting the first guiding unit and the second guiding unit to each other.

[0008] Furthermore, the first connecting mechanism includes a first base plate and a first connecting tooth, the first base plate being connected to the first guide wire, and the first connecting tooth being disposed on the first base plate.

[0009] Furthermore, multiple first connecting teeth are provided, and a first connecting groove is formed between two adjacent first connecting teeth.

[0010] Furthermore, the second connecting mechanism includes a second base plate and a second connecting tooth, the second base plate being connected to the second guide wire, and the second connecting tooth being disposed on the second base plate.

[0011] Furthermore, multiple second connecting teeth are provided, and a second connecting groove is formed between two adjacent second connecting teeth; the first connecting tooth can connect with the second connecting groove, and the second connecting tooth can connect with the first connecting groove, thereby connecting the first connecting mechanism and the second connecting mechanism.

[0012] Furthermore, the first connecting tooth has the same structure as the second connecting tooth.

[0013] Furthermore, the first connecting groove and the second connecting groove have the same structure.

[0014] Furthermore, the first connecting mechanism includes a first connecting rod and a connecting groove, wherein the first connecting rod is connected to the first guide wire.

[0015] Furthermore, multiple connecting grooves are provided, and they are sequentially arranged on the first connecting rod along the axial direction of the first connecting rod.

[0016] Furthermore, the second connecting mechanism includes a second connecting rod and a connecting flange. The second connecting rod is connected to the second guide wire. Multiple connecting flanges are provided and are sequentially arranged on the second connecting rod along the axial direction of the second connecting rod.

[0017] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0018] (1) The first connecting mechanism of the present invention is a magnetic component and the second connecting mechanism is an iron component; or the first connecting mechanism is an iron component and the second connecting mechanism is a magnetic component, and the first connecting mechanism can magnetically attract the second connecting mechanism to realize the automatic connection of the first connecting mechanism and the second connecting mechanism; in the process of establishing the connection path, the guiding device of the present invention does not require the guide wire to enter the catheter / sheath lumen in the blood vessel lumen, the operation is simple, the operation time is short, and the operation success rate is high;

[0019] (2) The airbag of the present invention can expand towards the central axis of the tube body, the outer wall of the airbag can be connected to the outer wall of the first base plate and the second base plate, and push the first connecting mechanism and the second connecting mechanism towards the central axis, and can make the first connecting tooth and the second connecting groove or the second connecting tooth and the first connecting groove completely connected, the first connecting tooth and the second connecting groove or the second connecting tooth and the first connecting groove have a large connection area and the connection is stable.

[0020] (3) The angle between the biting groove surface and the axis of the first guide wire is less than 90°. After the first connecting tooth is connected to the second connecting groove or the second connecting tooth is connected to the first connecting groove, the first guide wire is pulled away from the second guide wire. The biting tooth surface is connected to the biting groove surface, and the biting groove surface provides a component force to the biting tooth surface in the direction of the first base plate. The first connecting mechanism pulls the second connecting mechanism in the direction of the first connecting mechanism, further preventing the first connecting mechanism from separating from the second connecting mechanism.

[0021] (4) Under the magnetic attraction, the connecting flange of the present invention can be automatically and completely inserted into the connecting groove to realize the automatic and complete connection between the first connecting mechanism and the second connecting mechanism, and the first guide wire and the second guide wire are coaxial; when the first guide wire is pulled away from the second guide wire, there is no twisting between the first connecting mechanism and the second connecting mechanism, which further prevents the first connecting mechanism from separating from the second connecting mechanism.

[0022] (5) Under the magnetic attraction, the second connecting mechanism of the present invention only needs to connect one of the multiple grippers to establish a guide wire guiding path, reducing the operational difficulty of connecting the first guiding unit and the second guiding unit, shortening the operation time, and improving the success rate of the operation; the tube body pushes the clamping blocks of the multiple grippers to move in the axial direction of the tube body, and the clamping blocks of the multiple grippers can all be connected to the connecting flange. The first connecting mechanism can completely wrap the second connecting mechanism to prevent the first connecting mechanism from separating from the second connecting mechanism;

[0023] (6) The pull hook can connect the clamping block to the connecting flange. In addition to magnetic attraction, it further ensures that the clamping block does not detach from the connecting flange. One end of the spring is connected to the pull hook groove, and the other end of the spring is connected to the support rod. The spring is used to push the pull hook so that the protrusion is inserted into the pull groove and connected to the pull groove to prevent the clamping block from detaching from the connecting flange radially.

[0024] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the specification or be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained from the content specifically pointed out in the text and drawings. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the guiding device in Embodiment 1;

[0026] Figure 2 This is a schematic diagram of the axial cross-section structure of the guide device in Embodiment 1;

[0027] Figure 3 This is a schematic diagram of the overall structure of the guiding device in Example 2;

[0028] Figure 4 This is a schematic diagram of the overall structure of the guiding device in Example 3;

[0029] Figure 5 This is a schematic diagram of the axial cross-section structure of the guide device in Example 3;

[0030] Figure 6 This is a longitudinal section diagram of the locking unit in Example 4.

[0031] Figure label:

[0032] 1-First guidewire; 2-First connecting mechanism; 3-Second guidewire; 4-Second connecting mechanism; 5-Sheath unit; 6-Drainage valve; 21-First base plate; 22-First connecting tooth; 23-First connecting groove; 24-First connecting rod; 25-Connecting groove; 26-Traction rod; 27-Clamping block; 28-Hook groove; 41-Second base plate; 42-Second connecting tooth; 43-Second connecting groove; 44-Second connecting rod; 45-Connecting flange; 46-Traction groove; 51-Tube body; 52-Airbag; 61-Support rod; 62-Protrusion; 63-Spring; 231-Sliding groove surface; 232-Interlocking groove surface; 421-Sliding tooth surface; 422-Interlocking tooth surface. Detailed Implementation

[0033] The specific embodiments of the present invention are described below to enable those skilled in the art to understand the present invention. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they are within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0034] Example 1

[0035] A specific embodiment of the present invention, such as Figure 1 As shown, a guidewire guiding device (hereinafter referred to as the guiding device) for establishing intervascular access includes a first guiding unit and a second guiding unit. The first guiding unit includes a first guidewire 1 and a first connecting mechanism 2. The second guiding unit includes a second guidewire 3 and a second connecting mechanism 4. The first connecting mechanism 2 is disposed at the end of the first guidewire 1, and the second connecting mechanism 4 is disposed at the end of the second guidewire 3. The first connecting mechanism 2 and the second connecting mechanism 4 can be connected to each other, thereby connecting the first guiding unit and the second guiding unit to each other, thus constituting the guiding device of this embodiment.

[0036] Preferably, the first connecting mechanism 2 is a magnetic component and the second connecting mechanism 4 is an iron component; or the first connecting mechanism 2 is an iron component and the second connecting mechanism 4 is a magnetic component, the first connecting mechanism 2 can magnetically attract the second connecting mechanism 4, and the first connecting mechanism 2 and the second connecting mechanism 4 can automatically connect.

[0037] Taking the establishment of a femoral vein-jugular vein connection as an example, during use, medical personnel insert the first guiding unit into the femoral vein through the skin, guided by the first connecting mechanism 2. Then, the second guiding unit is inserted into the jugular vein, guided by the second connecting mechanism 4. The first connecting mechanism 2 and the second connecting mechanism 4 meet within the blood vessel lumen. Finally, the first connecting mechanism 2 and the second connecting mechanism 4 are connected, thus establishing a guidewire guiding device for subsequent operations that traverse the two veins. Compared to the "fishing" operation of existing technologies, the guiding device in this embodiment does not require the guidewire to enter the catheter / sheath lumen within the blood vessel lumen during the connection establishment process. This simplifies the operation, shortens the surgical time, and increases the success rate.

[0038] Preferred, such as Figure 1 As shown, the first connecting mechanism 2 includes a first base plate 21, first connecting teeth 22, and a first connecting groove 23. The first base plate 21 is connected to the first guide wire 1. The first connecting teeth 22 are disposed on the first base plate 21, and there are multiple first connecting teeth 22. The first connecting groove 23 is formed between two adjacent first connecting teeth 22. The second connecting mechanism 4 includes a second base plate 41, second connecting teeth 42, and a second connecting groove 43. The second base plate 41 is connected to the second guide wire 3. The second connecting teeth 42 are disposed on the second base plate 41, and there are multiple second connecting teeth 42. The second connecting groove 43 is formed between two adjacent second connecting teeth 42. The first connecting teeth 22 can connect to the second connecting groove 43, and the second connecting teeth 42 can also connect to the first connecting groove 23, thereby connecting the first connecting mechanism 2 and the second connecting mechanism 4.

[0039] When the first connecting mechanism 2 and the second connecting mechanism 4 are connected, some of the first connecting teeth 22 and the second connecting groove 43, or some of the second connecting teeth 42 and the first connecting groove 23, may not be connected. The connection area between the first connecting teeth 22 and the second connecting groove 43, or between the second connecting teeth 42 and the first connecting groove 23, may be small, resulting in an unstable connection. Preferably, as follows... Figure 1 As shown, in order to make the connection between the first connecting mechanism 2 and the second connecting mechanism 4 more stable, and to increase the connection area between the first connecting tooth 22 and the second connecting groove 43 or the second connecting tooth 42 and the first connecting groove 23, the guiding device in this embodiment also includes a sheath unit 5. The sheath unit 5 is sleeved on the first guiding unit and / or the second guiding unit. The sheath unit 5 is used for percutaneous puncture insertion into blood vessels to provide a channel for the first guiding unit and / or the second guiding unit.

[0040] Preferred, such as Figure 2 As shown, the sheath unit 5 includes a tube body 51 and an air bladder 52, with the air bladder 52 disposed on the inner wall of the tube body 51. The volume of the air bladder 52 can decrease after deflating and increase after inflation. Preferably, the air bladder 52 is an annular air bladder. During inflation, the air bladder 52 can expand towards the central axis of the tube body 51, and the outer wall of the air bladder 52 can connect with the outer walls of the first base plate 21 and the second base plate 41, pushing the first connecting mechanism 2 and the second connecting mechanism 4 towards the central axis. This allows the first connecting tooth 22 to fully connect with the second connecting groove 43 or the second connecting tooth 42 to the first connecting groove 23, resulting in a large connection area and a stable connection.

[0041] Preferably, the first connecting groove 23 and the second connecting groove 43 have the same structure, and the first connecting tooth 22 and the second connecting tooth 42 have the same structure. The first connecting groove 23 includes a sliding groove surface 231 and a meshing groove surface 232, both of which are planar, and the included angle between the sliding groove surface 231 and the meshing groove surface 232 is less than 90°. The tooth profile of the second connecting tooth 42 is the same as the cross-sectional shape of the first connecting groove 23. The second connecting tooth 42 includes a sliding tooth surface 421 and a meshing tooth surface 422. The angle between the engagement groove surface 232 and the axis of the first guide wire 1 is less than 90°. After the first connecting tooth 22 is connected to the second connecting groove 43 or the second connecting tooth 42 is connected to the first connecting groove 23, the first guide wire 1 is pulled away from the second guide wire 3. The engagement tooth surface 422 is connected to the engagement groove surface 232, and the engagement groove surface 232 provides a component force to the engagement tooth surface 422 in the direction of the first base plate 21. The first connecting mechanism 2 pulls the second connecting mechanism 4 in the direction of the first connecting mechanism 2, further preventing the first connecting mechanism 2 from separating from the second connecting mechanism 4.

[0042] Compared with the prior art, the first connecting mechanism 2 is disposed at the end of the first guidewire 1, and the second connecting mechanism 4 is disposed at the end of the second guidewire 3. The first connecting mechanism 2 and the second connecting mechanism 4 can be connected, thereby connecting the first guiding unit and the second guiding unit to each other, constituting the guiding device of this embodiment. Compared with the "fishing" operation of the prior art, in the process of establishing the connection path, the guiding device of this embodiment does not require the guidewire to enter the catheter / sheath lumen in the blood vessel lumen, which is simple to operate, has a short operation time, and a high success rate. The first connecting mechanism 2 is a magnetic component, and the second connecting mechanism 4 is an iron component; or the first connecting mechanism 2 is an iron component, and the second connecting mechanism 4 is a magnetic component. The first connecting mechanism 2 can magnetically attract the second connecting mechanism 4, and the first connecting mechanism 2 and the second connecting mechanism 4 can automatically connect. The balloon 52 can expand towards the central axis of the tube body 51, and the outer wall of the balloon 52 can connect with the first base plate 21 and the second connecting mechanism 4. The outer walls of the two base plates 41 are connected, and the first connecting mechanism 2 and the second connecting mechanism 4 are pushed towards the central axis. The first connecting tooth 22 and the second connecting groove 43 or the second connecting tooth 42 and the first connecting groove 23 are fully connected. The connection area of ​​the first connecting tooth 22 and the second connecting groove 43 or the second connecting tooth 42 and the first connecting groove 23 is large and the connection is stable. The angle between the biting groove surface 232 and the axis of the first guide wire 1 is less than 90°. After the first connecting tooth 22 and the second connecting groove 43 or the second connecting tooth 42 and the first connecting groove 23 are connected, the first guide wire 1 is pulled away from the second guide wire 3. The biting tooth surface 422 and the biting groove surface 232 are connected, and the biting groove surface 232 provides a component force to the biting tooth surface 422 in the direction of the first base plate 21. The first connecting mechanism 2 pulls the second connecting mechanism 4 towards the first connecting mechanism 2, further preventing the first connecting mechanism 2 and the second connecting mechanism 4 from separating.

[0043] Example 2:

[0044] In order for the first connecting mechanism 2 and the second connecting mechanism 4 to be automatically and fully connected, such as Figure 3 As shown, Embodiment 2 omits the sheath unit 5 in Embodiment 1 and improves the first connecting mechanism 2 and the second connecting mechanism 4 based on Embodiment 1, so that the first connecting mechanism 2 and the second connecting mechanism 4 can be automatically and completely connected.

[0045] Preferred, such as Figure 3As shown, the first connecting mechanism 2 includes a first connecting rod 24 and a connecting groove 25. The first connecting rod 24 is connected to the first guide wire 1. Multiple connecting grooves 25 are arranged sequentially on the first connecting rod 24 along its axial direction. The second connecting mechanism 4 includes a second connecting rod 44 and a connecting flange 45. The second connecting rod 44 is connected to the second guide wire 3. Multiple connecting flanges 45 are arranged sequentially on the second connecting rod 44 along its axial direction. The outer surface of the connecting flange 45 is the same as the inner surface of the connecting groove 25. Under magnetic attraction, the connecting flange 45 can automatically and completely insert into the connecting groove 25, achieving automatic and complete connection between the first connecting mechanism 2 and the second connecting mechanism 4.

[0046] Preferably, the connecting groove 25 is a semi-annular groove, and the connecting groove 25, the first connecting rod 24, and the first guide wire 1 are coaxial. The connecting flange 45 is an annular flange, and the connecting flange 45, the second connecting rod 44, and the second guide wire 3 are coaxial.

[0047] Compared to Embodiment 1, under magnetic attraction, the connecting flange 45 can automatically and completely insert into the connecting groove 25, realizing automatic and complete connection between the first connecting mechanism 2 and the second connecting mechanism 4, and the first guide wire 1 and the second guide wire 3 are coaxial. Pulling the first guide wire 1 away from the second guide wire 3, there is no twisting between the first connecting mechanism 2 and the second connecting mechanism 4, further preventing the first connecting mechanism 2 and the second connecting mechanism 4 from disengaging.

[0048] Example 3:

[0049] During the guiding process, when the first connecting mechanism 2 and the second connecting mechanism 4 pass through the bends of the blood vessel, they may still detach from each other due to the external force exerted by the blood vessel on the first connecting mechanism 2 and the second connecting mechanism 4. Therefore, as Figure 4 As shown, in embodiment 3, the first connecting mechanism 2 is improved based on embodiment 2, so that the first connecting mechanism 2 can completely wrap the second connecting mechanism 4 and prevent the first connecting mechanism 2 from separating from the second connecting mechanism 4.

[0050] Preferred, such as Figure 4 and Figure 5 As shown, the first connecting mechanism 2 in this embodiment includes multiple grippers. The multiple grippers are used to hold the second connecting mechanism 4. The second connecting mechanism 4 is a magnetic body.

[0051] Preferably, multiple grippers are evenly distributed circumferentially at one end of the first guidewire 1.

[0052] Preferably, the gripper includes a traction rod 26 and a clamping block 27, with the two ends of the traction rod 26 connected to the clamping block 27 and the first guide wire 1, respectively. The traction rod 26 is used to radially deviate the clamping block 27 from the axis of the first guide wire 1. The clamping block 27 is made of iron. A semi-annular groove is formed on the clamping block 27, and the outer surface of the connecting flange 45 is the same as the inner surface of the semi-annular groove. During the connection process between the first connecting mechanism 2 and the second connecting mechanism 4, under the magnetic attraction, the connecting flange 45 can automatically and completely connect with the semi-annular groove. The second connecting mechanism 4 only needs to connect one of the multiple grippers to establish a guide wire guiding path, reducing the operational difficulty of connecting the first guiding unit and the second guiding unit, shortening the operation time, and improving the success rate of the operation.

[0053] Preferably, the guiding device in this embodiment further includes a sheath unit 5, which is used to push the grippers so that all the grippers can be connected to the second connecting mechanism 4. The first connecting mechanism 2 can completely enclose the second connecting mechanism 4, thereby enhancing the stability of the connection between the first connecting mechanism 2 and the second connecting mechanism 4.

[0054] Preferred, such as Figure 5 As shown, the sheath unit 5 includes a tube body 51, which is sleeved on the first guide unit. After the second connecting mechanism 4 is connected to a gripper, the tube body 51 is pushed towards the second connecting mechanism 4. The end of the tube body 51 can be connected to the traction rod 26. Further pushing the tube body 51 pushes the gripping blocks 27 of multiple grippers to move in the axial direction of the tube body 51. The gripping blocks 27 of multiple grippers can all be connected to the connecting flange 45. The first connecting mechanism 2 can completely enclose the second connecting mechanism 4 to prevent the first connecting mechanism 2 from disengaging from the second connecting mechanism 4.

[0055] Preferably, the outer wall of the clamping block 27 is an arc-shaped outer wall, and the clamping blocks 27 of multiple jaws are combined to form a connecting cylinder. The connecting cylinder completely encloses the second connecting mechanism 4 and has a smooth surface, which reduces the resistance of the guiding device in this embodiment to travel through blood vessels.

[0056] Compared with Embodiment 2, under the magnetic attraction, the connecting flange 45 can automatically and completely connect with the semi-annular groove. The second connecting mechanism 4 only needs to connect one of the multiple grippers to establish the guide wire guiding path, which reduces the operational difficulty of connecting the first guiding unit and the second guiding unit, shortens the operation time, and improves the success rate of the operation. The tube body 51 is pushed, and the tube body 51 pushes the clamping blocks 27 of the multiple grippers to move in the axial direction of the tube body 51. The clamping blocks 27 of the multiple grippers can all be connected with the connecting flange 45. The first connecting mechanism 2 can completely wrap the second connecting mechanism 4 to prevent the first connecting mechanism 2 from separating from the second connecting mechanism 4.

[0057] Example 4:

[0058] To completely connect the first connecting mechanism 2 and the second connecting mechanism 4, as follows: Figure 6 As shown, based on embodiment 3, embodiment 4 further improves the first connecting mechanism 2 and the second connecting mechanism 4 by adding a locking unit to lock the connection between the first connecting mechanism 2 and the second connecting mechanism 4, thereby further preventing the first connecting mechanism 2 from separating from the second connecting mechanism 4.

[0059] Preferably, the locking unit includes a pull hook, a pull hook groove 28, and a pull groove 46. The pull hook groove 28 is disposed on the clamping block 27, and the pull groove 46 is disposed on the connecting flange 45. The pull hook is rotatably connected to the pull hook groove 28. The pull hook is used to connect the clamping block 27 to the connecting flange 45, and in addition to magnetic attraction, further ensures that the clamping block 27 does not detach from the connecting flange 45.

[0060] Preferably, the pull hook includes a support rod 61 and a protrusion 62. One end of the support rod 61 is rotatably connected to the pull hook groove 28, and the other end of the support rod 61 is connected to the protrusion 62, which can connect to the pull groove 46. Due to the restriction of the semi-annular groove, the connecting flange 45 can only be radially disengaged from the clamping block 27. However, due to the pull of the support rod 61, the protrusion 62 can still connect to the pull groove 46, thereby preventing the clamping block 27 from disengaging from the connecting flange 45.

[0061] Preferably, the locking unit further includes a spring 63, one end of which is connected to the hook groove 28 and the other end of which is connected to the support rod 61. The spring 63 is used to push the hook, so that the protrusion 62 is inserted into the pull groove 46 and connected to the pull groove 46, preventing the clamping block 27 from radially disengaging from the connecting flange 45.

[0062] Compared with embodiment 3, the pull hook is rotatably connected to the pull hook groove 28; the pull hook can connect the clamping block 27 to the connecting flange 45, and in addition to magnetic attraction, it further ensures that the clamping block 27 does not detach from the connecting flange 45. One end of the spring 63 is connected to the pull hook groove 28, and the other end of the spring 63 is connected to the support rod 61. The spring 63 is used to push the pull hook, so that the protrusion 62 is inserted into the pull groove 46 and connected to the pull groove 46, preventing the clamping block 27 from radially detaching from the connecting flange 45.

[0063] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A guidewire guiding device for establishing intervascular access, characterized in that, It includes a first guiding unit, a second guiding unit, and a sheath unit (5). The first guiding unit includes a first guide wire (1) and a first connecting mechanism (2). The second guiding unit includes a second guide wire (3) and a second connecting mechanism (4). The first connecting mechanism (2) is disposed at the end of the first guide wire (1), and the second connecting mechanism (4) is disposed at the end of the second guide wire (3). The first connecting mechanism (2) and the second connecting mechanism (4) can be connected to each other, thereby connecting the first guiding unit and the second guiding unit to each other. The second connecting mechanism (4) includes a connecting flange (45), which is connected to the second guide wire (3). The second connecting mechanism (4) is a magnetic body. The first connecting mechanism (2) includes multiple grippers; the grippers include a traction rod (26) and a clamping block (27), the two ends of the traction rod (26) are respectively connected to the clamping block (27) and the first guide wire (1); the traction rod (26) is used to make the clamping block (27) radially deviate from the axis of the first guide wire (1); a semi-annular groove is provided on the clamping block (27), and the outer surface of the connecting flange (45) is the same as the inner surface of the semi-annular groove; under the magnetic attraction, the connecting flange (45) can automatically and completely connect with the semi-annular groove, and the second connecting mechanism (4) only needs to connect one of the multiple grippers to establish a guide wire guiding passage; The sheath unit (5) is used to push the grippers so that all the grippers can be connected to the second connecting mechanism (4), and the first connecting mechanism (2) can completely enclose the second connecting mechanism (4); the sheath unit (5) includes a tube body (51), which is sleeved on the first guide unit; the tube body (51) is used to push the gripping blocks (27) of multiple grippers to move in the axial direction of the tube body (51), and the gripping blocks (27) of multiple grippers can be connected to the connecting flange (45), and the first connecting mechanism (2) can completely enclose the second connecting mechanism (4).

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