Adjustable thrombus-breaking guide wire

Abstract

The present invention discloses an adjustable thrombus-breaking guidewire, which belongs to the technical field of interventional treatment instruments, and comprises a guide guidewire, a thrombus-breaking guidewire and a controller, wherein a limiter is arranged near the distal end of the guide guidewire; the thrombus-breaking guidewire is slidably connected to the limiter, the distal end of the thrombus-breaking guidewire is connected to the distal end of the guide guidewire, and the area between the distal end of the guide guidewire and the limiter is the deformation area of ​​the thrombus-breaking guidewire; the controller is connected to the thrombus-breaking guidewire, and the controller is used to recycle or release the thrombus-breaking guidewire. The present invention allows the thrombus-breaking guidewire to bend and deform near its distal end to form a thrombus-breaking structure for thrombus-breaking, or uses the thrombus-breaking guidewire to bend the guide wire so as to turn in a blood vessel, thereby achieving a simpler structure, richer functions, lower costs, and higher flexibility and anti-bending performance, which helps to improve the accuracy and safety of surgery and meet the treatment needs of more complex diseases.

Description

Technical Field

[0001] The invention relates to the technical field of interventional treatment instruments, in particular to an adjustable thrombus-breaking guide wire. Background Art

[0002] In the medical field, especially in neurointervention and cardiovascular intervention, guidewires, as key medical devices, play a vital role. They are widely used to guide catheters into blood vessels or diseased areas for accurate diagnosis or treatment. However, with the continuous advancement of medical technology and the increasing complexity of clinical needs, traditional guidewires have gradually revealed their limitations when dealing with navigation in complex vascular structures or diseased areas.

[0003] Traditional guidewires are often difficult to accurately control their curvature and direction in complex vascular environments, which not only increases the difficulty of surgery, but also increases the risk of surgery. To overcome this problem, bend-adjustable guidewires came into being. By introducing advanced bend-adjusting mechanisms, bend-adjustable guidewires can flexibly adjust the curvature according to surgical requirements while maintaining softness and pushing force, thereby significantly improving the accuracy and safety of surgery.

[0004] Although bendable guidewires have shown great potential in medical interventional surgeries, there are still many shortcomings in the current bendable guidewire products on the market. On the one hand, the structure of most bendable guidewires is relatively complex, and they usually adopt a multi-lumen tube plus core wire plus handle design, which not only increases the difficulty of the production process, but also may lead to an increase in the risk of failure in use and an increase in operational difficulty. On the other hand, although bendable guidewires have enhanced functions compared to traditional guidewires, most products are still limited to a single guiding function and lack more innovation and versatility. In addition, the complex structure also leads to an increase in production costs, which in turn affects the market popularity and patient accessibility of bendable guidewires.

[0005] In addition to the above structural and functional defects, the guidewires currently on the market (including bendable guidewires) also generally face the problems of insufficient flexibility and insufficient bending resistance. In blood vessels with complex anatomical structures or stenosis, the guidewires often have difficulty reaching the designated position, or are damaged during use due to insufficient bending resistance, thus affecting the safety and effectiveness of the surgery.

[0006] Therefore, it is necessary to make technical improvements and innovations to the existing bending guide wires to solve the problems of complex structure, single function, high cost, and insufficient flexibility and bending resistance. Summary of the invention

[0007] The purpose of the present invention is to provide an adjustable thrombus-breaking guidewire to solve the problems existing in the above-mentioned prior art, so that the thrombus-breaking guidewire can be bent and deformed near its distal end to form a thrombus-breaking structure for thrombus breaking, or the thrombus-breaking guidewire can be used to bend the guide wire so as to turn in the blood vessel, thereby achieving a simpler structure, richer functions, lower costs, higher flexibility and bending resistance, which helps to improve the accuracy and safety of the operation and meet the treatment needs of more complex diseases.

[0008] To achieve the above object, the present invention provides the following solutions:

[0009] The present invention provides an adjustable embolism-breaking guidewire, comprising a guide guidewire, a embolism-breaking guidewire and a controller, wherein a limiter is arranged near the distal end of the guide guidewire; the embolism-breaking guidewire is slidably connected to the limiter, the distal end of the embolism-breaking guidewire is connected to the distal end of the guide guidewire, and the area between the distal end of the guide guidewire and the limiter is the deformation area of ​​the embolism-breaking guidewire; the controller is connected to the embolism-breaking guidewire, and the controller is used to recycle or release the embolism-breaking guidewire.

[0010] In one embodiment, a dome is further included, wherein the dome is disposed at the distal end of the guide wire, and the distal end of the thrombus-breaking guide wire is connected to the proximal end of the dome.

[0011] In one embodiment, the guide wire is provided with a hollow groove radially penetrating the guide wire, the hollow groove is located between the distal end of the guide wire and the stopper, and the thrombus-breaking guide wire is connected to the dome in the hollow groove.

[0012] In one embodiment, the hollow groove extends along the length direction of the guide wire, and the width of the hollow groove is greater than the diameter of the thrombus-breaking guide wire.

[0013] In one embodiment, the controller includes a first fixing portion fixedly connected to the guide wire and a second fixing portion fixedly connected to the thrombus-breaking guide wire, the first fixing portion is slidably connected to the second fixing portion, and the sliding direction is parallel to the length direction of the guide wire.

[0014] In one embodiment, the second fixing portion and the opening of the hollow groove are located on the same side of the guide wire.

[0015] In one embodiment, the first fixing portion is provided with a first through hole for sleeved the guide wire, and the second fixing portion is provided with a second through hole for sleeved the embolism-breaking guide wire.

[0016] In one embodiment, two second fixing parts are slidably provided on the first fixing part, each of the second fixing parts is connected to an independent embolism-breaking guide wire, and the distal end of the embolism-breaking guide wire enters the hollow groove from different directions of the hollow groove.

[0017] In one embodiment, a torque controller is disposed at the proximal end of the guide wire, and the torque controller is used to drive the guide wire to rotate.

[0018] In one embodiment, the thrombus-breaking guide wire is made of PTFE, and the limiter is made of a heat shrink tube.

[0019] Compared with the prior art, the present invention has achieved the following technical effects:

[0020] The present invention connects the distal end of the guide guide wire with the distal end of the thrombus-breaking guide wire, and uses a limiter to limit the radial position of the thrombus-breaking guide wire. When the controller releases and retracts the thrombus-breaking guide wire, the thrombus-breaking guide wire can be bent and deformed at a position close to its distal end to form a thrombus-breaking structure for thrombus breaking, or the thrombus-breaking guide wire can be used to bend the guide wire so as to facilitate turning in the blood vessel, thereby achieving a simpler structure, richer functions, lower cost, higher flexibility and bending resistance, which helps to improve the accuracy and safety of the operation and meet the treatment needs of more complex diseases. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments 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 work.

[0022] Figure 1 This is a schematic diagram of a thrombus-breaking guide wire provided on one side in an embodiment of the present invention;

[0023] Figure 2 for Figure 1 Schematic diagram of broken bolt state;

[0024] Figure 3 for Figure 1 Schematic diagram of bending adjustment state;

[0025] Figure 4 This is a schematic diagram of a controller in an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the distal end structure of an adjustable embolus-breaking guidewire in an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of embolus-breaking guide wires being provided on both sides in an embodiment of the present invention;

[0028] Figure 7 for Figure 6 Schematic diagram of broken bolt state;

[0029] Figure 8 Schematic diagram of the plug breaking and suction process in an embodiment of the present invention;

[0030] Among them, 1. guide wire; 11. hollow groove; 2. bolt-breaking guide wire; 3. limiter; 4. controller; 41. first fixing part; 411. first through hole; 42. second fixing part; 421. second through hole; 5. twist controller; 6. dome. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The purpose of the present invention is to provide an adjustable thrombus-breaking guidewire to solve the problems existing in the prior art, so that the thrombus-breaking guidewire can be bent and deformed near its distal end to form a thrombus-breaking structure for thrombus-breaking, or the thrombus-breaking guidewire can be used to bend the guide wire so as to turn in the blood vessel, thereby achieving a simpler structure, richer functions, lower costs, higher flexibility and anti-bending performance, which helps to improve the accuracy and safety of the operation and meet the treatment needs of more complex diseases.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] like Figure 1 to Figure 8As shown, the present invention provides an adjustable thrombus-breaking guidewire, comprising a guide wire 1, a thrombus-breaking guidewire 2 and a controller 4, wherein a limiter 3 is provided near the distal end of the guide wire 1, and the limiter 3 is mainly used to limit the radial movement position of the thrombus-breaking guidewire 2, so that the thrombus-breaking guidewire 2 can move axially (in the length direction of the guide wire 1) at the position of the limiter 3, and when moving in the distal direction, the thrombus-breaking guidewire 2 is bent and deformed for thrombus-breaking, and when moving in the proximal direction, the guide wire 1 is adjusted to adjust the curvature to facilitate compliance with the curvature of the blood vessel. It should be noted that the proximal end mentioned here and in the following text refers to the end close to the operator, and the distal end mentioned here and in the following text refers to the end away from the operator, that is, close to the patient. The thrombus-breaking guidewire 2 is slidably connected to the limiter 3, and the limiter 3 can be provided with a through hole or a limit groove for the thrombus-breaking guidewire 2 to move along the length direction of the guide wire 1. The distal end of the thrombus-breaking guidewire 2 is connected to the distal end of the guide wire 1, and the connection can be made by bonding or welding. The area between the distal end of the guide wire 1 and the stopper 3 is the deformation area of ​​the thrombus-breaking guide wire 2. That is to say, due to the limitation of the stopper 3, when the thrombus-breaking guide wire 2 is released to the distal end, the thrombus-breaking guide wire 2 bends and deforms, protrudes radially outward, and forms a thrombus-breaking structure. When the guide wire 1 is rotated, the formed thrombus-breaking structure rotates together, thereby realizing the function of thrombus-breaking. The controller 4 is connected to the thrombus-breaking guide wire 2, and when the controller 4 is moved, the thrombus-breaking guide wire 2 can be recovered or released. The controller 4 can be connected only to the thrombus-breaking guide wire 2. At this time, the controller 4 adopts an integral structure, and the movement of the controller 4 is used to drive the movement of the thrombus-breaking guide wire 2, but other devices need to be used to limit the position of the guide wire 1; the controller 4 can also be connected to both the thrombus-breaking guide wire 2 and the guide wire 1. At this time, the controller 4 adopts a split structure that can move relatively, one part drives the movement of the thrombus-breaking guide wire 2, and the other part limits the movement of the guide wire 1.

[0035] The present invention connects the distal end of the guide guide wire 1 with the distal end of the thrombus-breaking guide wire 2, and uses the limiter 3 to limit the radial position of the thrombus-breaking guide wire 2. When the controller 4 releases and retracts the thrombus-breaking guide wire 2, the thrombus-breaking guide wire 2 can be bent and deformed at a position close to its distal end to form a thrombus-breaking structure for thrombus breaking, or the thrombus-breaking guide wire 2 can be used to bend the guide wire 1 so as to facilitate turning in the blood vessel, thereby achieving a simpler structure, richer functions, lower cost, higher flexibility and bending resistance, which helps to improve the accuracy and safety of the operation and meet the treatment needs of more complex diseases.

[0036] In one embodiment, the proximal end of the limiter 3 extends all the way to the distal end of the controller 4, or one or more other limiters 3 are provided between the limiter 3 and the controller 4 to constrain the deformation area of ​​the thrombus-breaking guide wire 2, so that the thrombus-breaking guide wire 2 is deformed only in the deformation area between the distal end of the thrombus-breaking guide wire 2 and the limiter 3.

[0037] In one embodiment, a dome 6 is further included. The dome 6 is disposed at the distal end of the guide wire 1. The dome 6 has a spherical or near-spherical structure, which can effectively avoid damaging the blood vessel when advancing into the blood vessel. The distal end of the thrombus-breaking guide wire 2 is connected to the proximal end of the dome 6, that is, the dome 6 can cover the distal end of the thrombus-breaking guide wire 2, and the distal end of the thrombus-breaking guide wire 2 can effectively avoid damaging the blood vessel when the guide wire 1 moves.

[0038] In one embodiment, the guide wire 1 is provided with a hollow groove 11 that penetrates the guide wire 1 in the radial direction, and at least one hollow groove 11 is provided, and a plurality of hollow grooves 11 may be cross-arranged. The hollow groove 11 is located between the distal end of the guide wire 1 and the stopper 3, and the thrombus-breaking guide wire 2 is connected to the dome 6 in the hollow groove 11. When the thrombus-breaking guide wire 2 is recovered, the distal end of the thrombus-breaking guide wire 2 and the part close to the distal end thereof will be embedded in the hollow groove 11, thereby, when the guide wire 1 is moved in the blood vessel, the influence of the thrombus-breaking guide wire 2 can be avoided, and it is more convenient to move; when the thrombus-breaking guide wire 2 is released, the thrombus-breaking guide wire 2 can be deformed and extended from the hollow groove 11 to form a thrombus-breaking structure.

[0039] In one embodiment, the hollow groove 11 extends along the length direction of the guide wire 1, and the length of the hollow groove 11 may be less than or equal to the distance between the stopper 3 and the dome 6. The width of the hollow groove 11 is greater than the diameter of the embolism-breaking guide wire 2, so that the embolism-breaking guide wire 2 can be easily embedded in or extended out of the hollow groove 11. By setting the hollow groove 11, the rigidity of the distal end of the guide wire 1 can also be reduced, so that it can have the flexibility of bending and deformation, reducing the intense friction between the adjustable embolism-breaking guide wire and the blood vessel wall, and better adapting to the complex blood vessel structure.

[0040] In one embodiment, if Figure 4 As shown, the controller 4 includes a first fixing portion 41 fixedly connected to the guide wire 1 and a second fixing portion 42 fixedly connected to the thrombus-breaking guide wire 2. When fixedly connected, bonding or laser welding can be used to ensure that the connection between the first fixing portion 41 and the guide wire 1 is stable, and the connection between the second fixing portion 42 and the thrombus-breaking guide wire 2 is stable. The first fixing portion 41 is slidably connected to the second fixing portion 42, and the sliding direction is parallel to the length direction of the guide wire 1. For example, a slide rail is provided on the first fixing portion 41, and a slide groove connected to the slide rail is provided on the second fixing portion 42. Of course, the form of sliding connection between the first fixing portion 41 and the second fixing portion 42 is not limited to this, and other achievable sliding connection methods are all acceptable. When the first fixing portion 41 slides relative to the second fixing portion 42, the thrombus-breaking guide wire 2 can be moved relative to the guide wire 1, thereby realizing the recovery and release of the thrombus-breaking guide wire 2.

[0041] In one embodiment, the second fixing portion 42 and the opening of the hollow groove 11 are located on the same side of the guide wire 1. When the second fixing portion 42 moves, the embolism-breaking guide wire 2 can be freely embedded in and extended out of the hollow groove 11, avoiding the side of the hollow groove 11 from affecting the movement of the embolism-breaking guide wire 2.

[0042] In one embodiment, again referring to Figure 4 As shown, the first fixing portion 41 is provided with a first through hole 411 for sleeved guide wire 1, and the first through hole 411 has a transition fit or interference fit with the guide wire 1, which is convenient for fixing the guide wire 1. The second fixing portion 42 is provided with a second through hole 421 for sleeved embolism guide wire 2, and the second through hole 421 has a transition fit or interference fit with the embolism guide wire 2, which is convenient for fixing the embolism guide wire 2.

[0043] In one embodiment, at least one embolism-breaking guide wire 2 is provided, and two or more embolism-breaking guide wires may also be provided. Figure 6 and Figure 7 As shown, two bolt-breaking guide wires 2 are provided. At this time, two second fixing parts 42 are slidably provided on the first fixing part 41, and each second fixing part 42 is connected to an independent bolt-breaking guide wire 2, that is, each second fixing part 42 independently controls the bolt-breaking guide wire 2 connected thereto. The distal end of the bolt-breaking guide wire 2 enters the hollow groove 11 through different notches of the hollow groove 11, and is connected to the proximal end of the dome 6 in the hollow groove 11, thereby constraining the deformation direction of the bolt-breaking guide wire 2, so that after being deformed in the hollow groove 11, it can smoothly extend out from the same notch as the one entering the hollow groove 11.

[0044] In one embodiment, a torque controller 5 is provided at the proximal end of the guide wire 1, and the torque controller 5 is used to drive the guide wire 1 to rotate. The torque controller 5 has a larger diameter than the guide wire 1, which is convenient for holding and rotating, and can improve the convenience of the thrombus breaking process.

[0045] In one embodiment, the embolism-breaking guide wire 2 is made of PTFE (Polytetrafluoroethylene) and the stopper 3 is made of a heat shrink tube. The combination of PTFE and the heat shrink tube can reduce the sliding resistance of the embolism-breaking guide wire 2 and limit the radial displacement of the embolism-breaking guide wire 2. In addition, the use of a heat shrink tube as the stopper 3 has the advantages of simple structure, easy manufacture, and low cost.

[0046] In one embodiment, if Figure 8As shown, the adjustable thrombus-breaking guidewire enters the target position of the blood vessel together with the suction catheter, and the adjustable thrombus-breaking guidewire is pushed forward into the thrombus. The thrombus-breaking guidewire 2 is deployed by moving the controller 4 so that the thrombus-breaking guidewire 2 is bent and deformed at the distal end to form a thrombus-breaking structure. The thrombus is broken up by the thrombus-breaking structure using the rotating torque controller 5, and then the adjustable thrombus-breaking guidewire is withdrawn, and the broken thrombus is started to be sucked out by the suction catheter. After the suction is completed, the suction catheter is withdrawn from the body.

[0047] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An adjustable thrombus-breaking guidewire, characterized in that: include: A guide wire, wherein a limiter is provided near a distal end of the guide wire; A thrombus-breaking guidewire, wherein the thrombus-breaking guidewire is slidably connected to the stopper, the distal end of the thrombus-breaking guidewire is connected to the distal end of the guide guidewire, and the area between the distal end of the guide guidewire and the stopper is a deformation area of ​​the thrombus-breaking guidewire; and a controller, wherein the controller is connected to the embolism-breaking guidewire and is used to recycle or release the embolism-breaking guidewire; the controller comprises a first fixing portion fixedly connected to the guide wire and a second fixing portion fixedly connected to the embolism-breaking guidewire, the first fixing portion is slidably connected to the second fixing portion, and the sliding direction is parallel to the length direction of the guide wire.

2. The adjustable embolus-breaking guidewire according to claim 1, characterized in that: It also includes a dome, which is arranged at the distal end of the guide wire, and the distal end of the embolism-breaking guide wire is connected to the proximal end of the dome.

3. The adjustable embolus-breaking guidewire according to claim 2, characterized in that: The guide wire is provided with a hollow groove which penetrates the guide wire in radial direction, the hollow groove is located between the distal end of the guide wire and the stopper, and the embolism-breaking guide wire is connected to the dome in the hollow groove.

4. The adjustable embolus-breaking guidewire according to claim 3, characterized in that: The hollow groove extends along the length direction of the guide wire, and the width of the hollow groove is greater than the diameter of the thrombus-breaking guide wire.

5. The adjustable embolus-breaking guidewire according to claim 4, characterized in that: The second fixing portion and the opening of the hollow groove are located on the same side of the guide wire.

6. The adjustable embolus-breaking guidewire according to claim 4, characterized in that: The first fixing portion is provided with a first through hole for sleeve-mounting the guide wire, and the second fixing portion is provided with a second through hole for sleeve-mounting the embolism-breaking guide wire.

7. The adjustable embolus-breaking guidewire according to claim 4, characterized in that: Two second fixing parts are slidably arranged on the first fixing part, each of the second fixing parts is connected with an independent embolism-breaking guide wire, and the distal ends of the embolism-breaking guide wires enter the hollow groove from different directions of the hollow groove.

8. The adjustable embolus-breaking guidewire according to claim 1, characterized in that: A torque controller is arranged at the proximal end of the guide wire, and the torque controller is used to drive the guide wire to rotate.

9. The adjustable embolus-breaking guidewire according to claim 1, characterized in that: The thrombus-breaking guide wire is made of PTFE material, and the limiter is made of a heat shrink tube.

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