Guidewire insertion device for neurointervention

Abstract

The utility model provides a guide wire insertion device for nerve intervention belongs to medical instrument technical field, in order to solve the existing insertion micro guide wire more depend on the experience of operator, easy because of fatigue leads to the inaccuracy of wire insertion, guide wire is folded, straight push type passes through narrow blood vessel poor performance, easy to damage blood vessel, when carrying out the pipe replacement operation to the distal fine blood vessel, easy to make guide wire shift, also can increase operation length of time, radiation and complication risk problem, the utility model discloses an artery sheath pipe, the inside of artery sheath pipe is inserted with long sheath pipe, the top of long sheath pipe is inserted with Y type connecting pipe, the utility model passes through guide wire helical rotation feed, improves the integrity and passability of guide wire, improves the adaptability of guide wire to complex blood vessel environment, through the variable diameter catheter to adapt the intracranial distal fine blood vessel, improve the smoothness of instrument follow-up, also can take advantage of the deformation characteristics of metal braided frame to consider the support and flexibility of catheter end, reduce the stimulation and damage of catheter to blood vessel wall.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a guidewire insertion device for neurointervention. Background Technology

[0002] Neurointerventional guidewires are ultra-thin, highly flexible medical guiding devices that enter the systemic circulation through puncture of the femoral or radial artery. They navigate along natural vascular pathways to the target intracranial vessel, providing mechanical support and pathway planning for subsequent instrument delivery. Their design goal is to achieve a triple balance of high torsional control, strong tracking ability, and low trauma, ensuring stable progress in the complex and tortuous cerebral vascular network and avoiding damage or perforation of the vessel wall.

[0003] Currently, in neurointerventional surgery, microguidewires are mostly delivered manually by the surgeon. The operation is highly dependent on the surgeon's clinical experience and must follow the principles of stable control, slow wire advance, and frequent fluoroscopic confirmation to safely deliver the wire to the target vessel. However, prolonged high-concentration operation can easily lead to surgeon fatigue, resulting in inaccurate wire advance speed, wire accumulation and kinking within the vessel lumen. Furthermore, the simple axial linear push method has poor passability in tortuous and narrow vessel segments, which can easily cause endothelial damage, spasm, and even perforation. At the same time, for delicate vessels in the distal intracranial cavity, it is necessary to replace the microcatheter with a suitable one for intraluminal exchange of the guidewire. During this process, the guidewire is prone to displacement, dislodgement, or accidental forward movement, which also prolongs the operation time, increases radiation exposure for both doctors and patients, increases the amount of contrast agent used, and raises the probability of complications.

[0004] To address the above issues, a guidewire insertion device for neurointervention has been proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a guidewire insertion device for neurointervention. Using this device solves the problems mentioned above, where microguidewires are mostly manually delivered by the operator, the operation is highly dependent on clinical experience, and prolonged high-concentration operation can easily lead to fatigue, resulting in inaccurate guidewire insertion, guidewire stacking and kinking, poor axial straight-line push in tortuous and narrow blood vessels, easy vascular damage, and the need for catheter replacement in distal slender blood vessels, which can easily cause guidewire displacement, prolong the operation time, and increase the risk of radiation, contrast agent load and complications.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a guidewire insertion device for neurointervention, comprising an arterial sheath, a long sheath inserted inside the arterial sheath, a Y-shaped connecting tube inserted at the top of the long sheath, a locking connection assembly snapped onto the top of the Y-shaped connecting tube, a microcatheter inserted inside the Y-shaped connecting tube, a microguidewire inserted inside the microcatheter, a spiral feeding assembly rotatably connected to the top of the locking connection assembly, and a diameter-adapting assembly fixedly connected to the inner wall of the distal end of the microcatheter.

[0007] Furthermore, the locking connection assembly includes a connection cavity sleeved on the top end of the Y-shaped connection tube, a first reset elastic element is fixedly connected to the bottom surface of the connection cavity, a push plate is fixedly connected to the bottom of the first reset elastic element, and the push plate is slidably connected to the connection cavity.

[0008] Furthermore, two rotating shafts are symmetrically fixedly installed on one side wall of the connecting cavity. A locking block is rotatably connected to the surface of the rotating shaft. A compression elastic element is fixedly connected to one side surface of the locking block. One end of the compression elastic element is fixedly connected to the surface of the connecting cavity. A wedge-shaped groove is opened on the bottom surface of the connecting end of the Y-shaped connecting tube. The bottom end of the locking block can engage with the wedge-shaped groove.

[0009] Furthermore, the spiral feed assembly includes an adjustment knob rotatably connected to the top of the connecting cavity. The adjustment knob has a hollow center and is fitted onto the surface of the microguidewire. A ring bevel gear is fixedly connected to the bottom surface of the adjustment knob, and a drive shaft is rotatably connected to the inner wall of the connecting cavity.

[0010] Furthermore, a transmission bevel gear is fixedly connected to the surface of the drive shaft, and a first conveyor frame is fixedly connected to the center of the drive shaft. A medical silicone liner is fixedly connected to the surface of the first conveyor frame.

[0011] Furthermore, the inner wall of the connecting cavity is also slidably connected to a stretching frame, the end of the stretching frame is fixedly connected to a butterfly-shaped elastic washer, the front end of the stretching frame is rotatably connected to a second conveying frame, and the surface of the second conveying frame is also provided with a medical silicone liner.

[0012] Furthermore, a connecting bracket is slidably connected to the inner wall of the adjusting knob, and a roller telescopic elastic element is fixedly connected to one end of the connecting bracket. One end of the roller telescopic elastic element is fixedly connected to the inner wall of the adjusting knob, and a medical delivery roller is rotatably connected to the other end of the connecting bracket. The surface of the medical delivery roller is in contact with the surface of the microguidewire.

[0013] Furthermore, the variable diameter adapter includes an annular fixing base fixedly connected to the inner wall surface of the microcatheter end, a second reset elastic member fixedly connected to the bottom surface of the annular fixing base, an annular sliding seat fixedly connected to the bottom of the second reset elastic member, the annular sliding seat slidingly connected to the surface of the inner wall of the microcatheter end, and a linkage rod rotatably connected to the inner wall of the microcatheter end.

[0014] Furthermore, a variable diameter annular tube is inserted into one end of the linkage rod, and the variable diameter annular tube is fixedly connected to the open end of the microcatheter. A linkage swing rod is rotatably connected to the bottom surface of the annular sliding seat. The linkage swing rod is rotatably connected to the linkage rod, and a transmission pull rod is rotatably connected to one end of the linkage swing rod. A metal braided frame is sleeved on the inner wall of the microcatheter, and one end of the transmission pull rod is fixedly connected to the intersection of the metal braided frame and the transmission pull rod.

[0015] Furthermore, two traction ropes are fixedly connected to the surface of the annular sliding seat. The two traction ropes are arranged in a mirror image on the surface of the annular sliding seat. The traction ropes are located inside the microcatheter. An installation block is fixedly connected to one side surface of the connecting cavity. Multiple locking plates are inserted around one end of the installation block. Knob bolts are engaged on the surfaces of the multiple locking plates. One end of the microguidewire passes through the installation block.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention replaces manual pushing of the microguidewire with a spiral feeding component. Utilizing the stable transmission of annular and drive bevel gears, along with the flexible clamping and delivery of the guidewire by first and second delivery frames lined with medical-grade silicone, it achieves controllable and precise guidewire feeding. This effectively reduces the reliance on the surgeon's clinical experience. Furthermore, the spiral feeding improves the integrity and passability of the microguidewire. The slow rotation of the guidewire reduces kinetic damage to the blood vessel, enhancing its adaptability to complex vascular environments. It also avoids surgeon fatigue caused by prolonged high-intensity operation, reduces guidewire accumulation and kinking within the vascular lumen due to inaccurate feeding speed, and improves the stability and consistency of the surgical procedure.

[0017] By setting up a locking connection assembly and a guidewire locking structure, and utilizing the locking block and wedge-shaped groove, the feeding device and Y-type connecting tube can be quickly assembled and disassembled. The assembly is convenient and the connection is stable, providing a stable support base and operating space for the instrument. At the same time, through the cooperation of the mounting block, the surrounding locking plate and the knob bolt, the microguidewire can be reliably locked and positioned during distal capillary catheter replacement operations, effectively preventing guidewire displacement or accidental forward movement, significantly shortening the time of intravascular exchange operations, reducing the duration of radiation exposure for medical staff and patients and the amount of contrast agent used, and lowering the probability of postoperative complications.

[0018] By setting a variable diameter adapter component at the end of the microcatheter, and driving the axial displacement of the annular sliding seat through the pull rope, and through the transmission cooperation of the linkage swing rod and the linkage long rod, the variable diameter ring tube and the metal braid frame can be driven to generate adaptive deformation synchronously, realizing the dynamic adjustment of the catheter tip diameter. This can not only adapt to the delicate intracranial distal blood vessels of different diameters and improve the smoothness of instrument follow-up, but also take into account the support and flexibility of the catheter tip by utilizing the deformation characteristics of the metal braid frame, further reducing the stimulation and damage to the blood vessel wall during catheter travel, and improving the operative adaptability and surgical safety under complex distal vascular pathways. Attached Figure Description

[0019] Figure 1 This is a first-view three-dimensional structural diagram of the present invention; Figure 2 This is a second-view three-dimensional structural diagram of the present invention; Figure 3 This is a cross-sectional view of the overall structure of the present invention; Figure 4 This is a three-dimensional structural diagram of the Y-valve tube and the connecting cavity of the present invention; Figure 5 This is a cross-sectional view of the connecting cavity of the present invention; Figure 6 This is a three-dimensional structural diagram of the microguidewire and medical silicone liner of the present invention. Figure 7 This is a three-dimensional structural diagram of the engagement between the annular bevel gear and the transmission bevel gear of the present invention; Figure 8 This is a three-dimensional structural diagram of the adjustment knob and the annular bevel gear of the present invention; Figure 9 for Figure 8 Enlarged view of point A in the middle; Figure 10 This is a three-dimensional structural diagram of the connection cavity and the Y-shaped connecting tube of the present invention. Figure 11 for Figure 10 Enlarged view of point B in the middle; Figure 12 This is a three-dimensional structural diagram of the microcatheter and the traction rope of the present invention; Figure 13 This is a three-dimensional structural diagram of the inner wall of the microcatheter and the metal braided frame of the present invention; Figure 14 This is a three-dimensional structural diagram of the linkage rod and the variable diameter ring tube of the present invention. Figure 15 This is a three-dimensional structural diagram of the linkage rod and linkage swing rod of the present invention.

[0020] In the diagram: 1. Arterial sheath; 2. Long sheath; 3. Y-shaped connecting tube; 4. Microcatheter; 5. Microguidewire; 6. Locking connection assembly; 61. Connecting cavity; 62. First reset elastic element; 63. Push plate; 64. Snap-fit ​​locking block; 65. Compression elastic element; 66. Wedge-shaped groove; 67. Rotating shaft; 7. Helical feed assembly; 71. Adjustment knob; 72. Annular bevel gear; 73. Drive shaft; 74. Transmission bevel gear; 75. First delivery frame; 76. Medical silicone liner; 77. 78. Extension frame; 79. Butterfly-shaped elastic washer; 70. Second conveyor frame; 710. Connecting bracket; 711. Medical conveyor roller; 712. Roller body telescopic elastic element; 8. Variable diameter adapter assembly; 81. Annular fixed base; 82. Second reset elastic element; 83. Annular sliding seat; 84. Linkage rod; 85. Linkage swing rod; 86. Transmission pull rod; 87. Variable diameter ring tube; 88. Metal braided frame; 89. Pull rope; 810. Mounting block; 811. Locking plate; 812. Knob bolt. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figures 1-15 As shown, the following preferred technical solution is provided: a guidewire insertion device for neurointervention, including an arterial sheath 1. The arterial sheath 1 is used to establish a vascular access channel after percutaneous puncture, providing stable support for the insertion and delivery of subsequent instruments. A long sheath 2 is inserted inside the arterial sheath 1. The long sheath 2 extends the delivery path by being inserted into the arterial sheath 1, reaching the proximal large blood vessel position, providing a straight introduction channel for subsequent instruments. A Y-shaped connecting tube 3 is inserted at the top of the long sheath 2. After the Y-shaped connecting tube 3 is connected to the long sheath 2, it is used to achieve dual-channel operation of instrument delivery and contrast agent injection while maintaining the closure of the access. A locking connection component 6 is snapped into the top of the Y-shaped connecting tube 3. The locking connection component 6 is used to realize the quick assembly and disassembly and stable connection between the subsequent feeding device and the Y-shaped connecting tube 3, providing a stable installation benchmark for the delivery of subsequent instruments. At the same time, the firm support connection also provides reliable operating conditions for subsequent manual operation by medical staff. like Figures 1-3As shown, a microcatheter 4 is inserted inside the Y-shaped connecting tube 3, and a microguidewire 5 is inserted inside the microcatheter 4. After the microguidewire 5 is inserted into the microcatheter 4, the microcatheter 4 and the microguidewire 5 are inserted together through the Y-shaped connecting tube 3 and continue to pass through the long sheath 2. Then, the microguidewire 5, together with the microcatheter 4, navigates to the target lesion location in the blood vessel, providing path guidance for the microcatheter 4, so that the microcatheter 4 can reach the designated position for intraoperative operations. The top of the locking connecting component 6 is rotatably connected to a spiral feeding component 7. The spiral feeding component 7 is used to replace manual pushing. The microguidewire 5 can be spirally controlled to feed and withdraw by medical staff through manual adjustment, reducing operator fatigue and wire insertion error. like Figure 3 As shown, a diameter-adaptive component 8 is fixedly connected to the inner wall of the end of the microcatheter 4. The diameter-adaptive component 8 is used when the microcatheter 4 reaches a smaller blood vessel. If the current diameter is too small to continue, the microcatheter 4 needs to be replaced with a smaller diameter microcatheter 4 to continue. The diameter-adaptive component 8 adjusts the outer diameter of the end of the microcatheter 4 through its own structure, making it feasible for the microcatheter 4 to pass through the smaller blood vessel. This improves the passage of tortuous and narrow blood vessels and distal slender blood vessels, reduces the risk of blood vessel wall damage, reduces the time required to replace the microcatheter 4 and microguidewire 5, and avoids the microguidewire 5 from shifting or accidentally surging forward during the intraluminal exchange between the microcatheter 4 and microguidewire 5. This reduces the operation time, reduces radiation exposure for doctors and patients, and reduces the amount of contrast agent used. The microcatheter 4 is hollow, which facilitates the operation and manipulation of the diameter-adaptive component 8, improves the adaptability of the microcatheter 4, improves the operability and precision of the operation, and reduces the impact of complicated operations. When the operation is over, the microguidewire 5 is withdrawn by the medical staff through the reverse operation of the spiral feed component 7. The locking connection component 6 works in conjunction with the Y-type connecting tube 3 to achieve a stable connection, providing a stable conveying support foundation for the subsequent spiral feed component 7. Through the stable connection between the locking connection component 6 and the Y-type connecting tube 3, the conveying stability of the microguidewire 5 is improved, while the smoothness of the microguidewire 5 passing through is also improved, avoiding the swaying of the entire insertion device's conveying part, which would cause the microguidewire 5 to accumulate and fold, thus improving the smoothness of the passage and reducing the occurrence of medical accidents. The spiral feed assembly 7, in conjunction with the locking connection assembly 6, operates under stable support. Medical personnel can manually adjust the structure on the spiral feed assembly 7 to achieve spiral delivery of the microguidewire 5, improving its passability and overall integrity, as well as its overall structural strength. Furthermore, during spiral delivery, the microguidewire 5 can automatically resolve vascular resistance through spiral rotation, reducing damage to the blood vessel. When encountering resistance or bends in the blood vessel, the spiral-advancing microguidewire 5 can automatically rotate. In environments with relatively simple vascular entanglement, it can directly traverse curved vascular paths, reducing the time spent by medical personnel.

[0023] like Figures 2-4 As shown, the locking connection assembly 6 includes a connecting cavity 61 sleeved on the top of the Y-shaped connecting tube 3. A first reset elastic member 62 is fixedly connected to the bottom surface of the connecting cavity 61, and a push plate 63 is fixedly connected to the bottom of the first reset elastic member 62. The push plate 63 is slidably connected to the connecting cavity 61. After the Y-shaped connecting tube 3 is connected to the long sheath tube 2, the locking connection assembly 6 is connected to the Y-shaped connecting tube 3. First, the connecting cavity 61 is moved downward from the top of the Y-shaped connecting tube 3. Then, the push plate 63 in the connecting cavity 61 contacts the top of the Y-shaped connecting tube 3. Subsequently, the first reset elastic member 62 is squeezed, and then the bottom edge of the connecting cavity 61 gradually covers the top of the Y-shaped connecting tube 3.

[0024] like Figures 3-5 As shown, two rotating shafts 67 are symmetrically fixedly installed on one side wall of the connecting cavity 61. A locking block 64 is rotatably connected to the surface of each rotating shaft 67. A compression elastic element 65 is fixedly connected to one side surface of the locking block 64. One end of the compression elastic element 65 is fixedly connected to the surface of the connecting cavity 61. A wedge-shaped groove 66 is provided on the bottom surface of the connecting end of the Y-shaped connecting tube 3. The bottom end of the locking block 64 can engage with the wedge-shaped groove 66. As the connecting cavity 61 continues to be pressed down, the arc-shaped surface of the bottom end of the locking block 64 slides into contact with the Y-shaped connecting tube 3. At this time, the bottom end of the locking block 64 flips outward, and one end of the locking block 64... The side surface presses the compression elastic element 65 onto the connecting cavity 61. Then, after the locking block 64 moves to the bottom of the connecting end of the Y-shaped connecting tube 3, and there is no obstruction at the bottom of the locking block 64, the compression elastic element 65 resets, so that the bottom end of the locking block 64 engages with the wedge-shaped groove 66 on the bottom surface of the Y-shaped connecting tube 3, thus achieving a secure connection between the connecting cavity 61 and the Y-shaped connecting tube 3. When the connecting cavity 61 needs to be disengaged, medical staff only need to press one end of the locking block 64 to lift the connecting cavity 61, which can complete the disengagement, achieving quick installation and separation. At the same time, it provides a stable support foundation for subsequent instrument delivery.

[0025] like Figures 2-8 As shown, the spiral feed assembly 7 includes an adjustment knob 71 rotatably connected to the top of the connecting cavity 61. The adjustment knob 71 has a hollow center and is fitted onto the surface of the microguidewire 5. A ring bevel gear 72 is fixedly connected to the bottom surface of the adjustment knob 71. A drive shaft 73 is rotatably connected to the inner wall of the connecting cavity 61. After the locking connection assembly 6 is installed, the microguidewire 5 has passed through the spiral feed assembly 7. At this time, the drive shaft 73 can rotate freely inside the connecting cavity 61. When the adjustment knob 71 is manually turned by medical personnel, the adjustment knob 71 can rotate at the top of the connecting cavity 61. As the adjustment knob 71 rotates, the ring bevel gear 72 rotates synchronously.

[0026] like Figures 3-6 As shown, a transmission bevel gear 74 is fixedly connected to the surface of the drive shaft 73, and a first delivery frame 75 is fixedly connected to the center of the drive shaft 73. A medical silicone liner 76 is fixedly connected to the surface of the first delivery frame 75. The rotation of the ring bevel gear 72 drives the meshing transmission bevel gear 74 to rotate synchronously. At this time, the driving force of the transmission bevel gear 74 causes the drive shaft 73 to drive the first delivery frame 75 to rotate. As the first delivery frame 75 rotates, the medical silicone liner 76 fixedly connected to the first delivery frame 75 rotates in contact with the microguidewire 5. At this time, the microguidewire 5 is driven to be delivered in the blood vessel by the friction of the medical silicone liner 76.

[0027] like Figures 5-7 As shown, an extension frame 77 is slidably connected to the inner wall of the connecting cavity 61. A butterfly elastic washer 78 is fixedly connected to the end of the extension frame 77, and a second conveying frame 79 is rotatably connected to the front end of the extension frame 77. The surface of the second conveying frame 79 is also provided with a medical silicone liner 76. As the microguidewire 5 is conveyed, the medical silicone liner 76 on the second conveying frame 79 rotates synchronously. At this time, due to the elastic pushing action of the butterfly elastic washer 78, the second conveying frame 79, which is rotatably connected to the extension frame 77, drives the medical silicone liner 76 to adhere to the surface of the microguidewire 5 and rotate synchronously, providing conveying support force and ensuring that the microguidewire 5 can be continuously conveyed forward.

[0028] like Figures 5-9 As shown, a connecting bracket 710 is slidably connected to the inner wall of the adjusting knob 71. One end of the connecting bracket 710 is fixedly connected to a roller telescopic elastic element 712, and one end of the roller telescopic elastic element 712 is fixedly connected to the inner wall of the adjusting knob 71. The other end of the connecting bracket 710 is rotatably connected to a medical delivery roller 711, the surface of which is in contact with the surface of the microguidewire 5. The connecting bracket 710 is supported by the roller telescopic elastic element 712, and the friction of the two medical delivery rollers 711 is moderate, enabling the two symmetrically arranged medical delivery rollers to maintain their position at all times. The surface of the microguidewire 5 is attached to the adjustment knob 71. As the adjustment knob 71 is turned, the two rolling medical delivery rollers 711 clamp the microguidewire 5 and rotate synchronously. At the same time, the rolling characteristics of the two medical delivery rollers 711 transform the static friction between the medical delivery rollers 711 and the microguidewire 5 into rolling friction, which can maintain continuous delivery during the tumbling process of the microguidewire 5. Moreover, the pressure applied by the two roller body telescopic elastic elements 712 to the medical delivery rollers 711 does not affect the normal delivery of the microguidewire 5, reducing damage to the microguidewire 5, thereby realizing the spiral rotation delivery of the microguidewire 5.

[0029] like Figures 3-15As shown, the variable diameter adapter component 8 includes an annular fixing base 81 fixedly connected to the inner wall surface of the end of the microcatheter 4. A second reset elastic member 82 is fixedly connected to the bottom surface of the annular fixing base 81. An annular sliding seat 83 is fixedly connected to the bottom of the second reset elastic member 82. The annular sliding seat 83 is slidably connected to the surface of the inner wall of the end of the microcatheter 4. A linkage rod 84 is rotatably connected to the inner wall of the end of the microcatheter 4. When the image shows that the advancing blood vessel of the microcatheter 4 becomes thinner, the variable diameter adapter component 8 starts to operate. The annular sliding seat 83 can slide on the surface of the inner wall of the end of the microcatheter 4. When the annular sliding seat 83 slides upward, the second reset elastic member 82 under the annular fixing base 81 begins to contract.

[0030] like Figures 10-14 As shown, one end of the linkage rod 84 is inserted into a variable diameter annular tube 87, which is fixedly connected to the open end of the microcatheter 4. A linkage swing rod 85 is rotatably connected to the bottom surface of the annular sliding seat 83, and is rotatably connected to the linkage rod 84. One end of the linkage swing rod 85 is rotatably connected to a transmission pull rod 86. A metal braided frame 88 is sleeved on the inner wall of the microcatheter 4, and one end of the transmission pull rod 86 is fixedly connected to the intersection of the metal braided frame 88. As the annular sliding seat 83 slides upward, the linkage swing rod 85, rotatably connected to the annular sliding seat 83, begins to rise inside the microcatheter 4 along with the annular sliding seat 83, while simultaneously moving towards the inner wall of the microcatheter 4. Then, the linkage rod... The lever 84 is pulled by the linkage lever 85 towards the inner wall of the microcatheter 4. At this time, as the linkage lever 84 moves, the variable diameter ring tube 87 of the variable medical material connected to the bottom of the multiple linkage levers 84 begins to reduce the diameter of the opening. At the same time, while the linkage lever 85 swings, the transmission pull rod 86 pulls the metal braided frame 88 inside the microcatheter 4 to extend, so that the tube wall in this part is stretched and thinned, thereby reducing the tube diameter. This is a functional description of the change in the diameter of the opening of the microcatheter 4. In order to improve the scenario adaptability of the solution, those skilled in the art can complete the adaptation selection based on the operation logic of this solution and the needs of the actual working environment, combined with conventional technical means.

[0031] like Figures 6-15As shown, two traction ropes 89 are fixedly connected to the surface of the annular sliding seat 83. The two traction ropes 89 are arranged in a mirror image on the surface of the annular sliding seat 83. The traction ropes 89 are located inside the microcatheter 4. An installation block 810 is fixedly connected to one side surface of the connecting cavity 61. Multiple locking plates 811 are inserted around one end of the installation block 810. The surfaces of the multiple locking plates 811 are engaged with knob bolts 812. One end of the microguidewire 5 passes through the installation block 810. When the diameter of the microcatheter 4 needs to be changed, medical staff only need to pull the two traction ropes 89 at the ends of the installation block 810 at both ends of the connecting cavity 61. Pull rope 89, and then two pull ropes 89 pull the annular sliding seat 83 to slide on the inner wall of the microcatheter 4. As the diameter of the microcatheter 4 reaches the required size, rotate the knob bolt 812 on the surface of multiple locking plates 811. As the knob bolt 812 rotates continuously, the multiple locking plates 811 converge toward the center, tighten the pull rope 89 to fix it, and complete the change of the diameter of the microcatheter 4. This makes it feasible for smaller blood vessels, improves the passage of tortuous and narrow blood vessels and distal slender blood vessels, reduces the time required to change the microcatheter 4 and microguidewire 5, reduces radiation to doctors and patients and the amount of contrast agent used, and improves surgical efficiency.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A guidewire insertion device for neurointervention, comprising an arterial sheath (1), characterized in that: The arterial sheath (1) is internally connected to a long sheath (2), and a Y-shaped connecting tube (3) is inserted into the top of the long sheath (2). A locking connection assembly (6) is snapped into the top of the Y-shaped connecting tube (3). A microcatheter (4) is inserted into the inside of the Y-shaped connecting tube (3). A microguidewire (5) is inserted into the inside of the microcatheter (4). A spiral feeding assembly (7) is rotatably connected to the top of the locking connection assembly (6). A diameter-adapting assembly (8) is fixedly connected to the inner wall of the end of the microcatheter (4).

2. The guidewire insertion device for neurointervention according to claim 1, characterized in that: The locking connection assembly (6) includes a connection cavity (61) sleeved on the top end of the Y-shaped connection tube (3). A first reset elastic element (62) is fixedly connected to the bottom surface of the connection cavity (61). A push plate (63) is fixedly connected to the bottom of the first reset elastic element (62). The push plate (63) is slidably connected to the connection cavity (61).

3. The guidewire insertion device for neurointervention according to claim 2, characterized in that: Two rotating shafts (67) are symmetrically fixedly installed on one side wall of the connecting cavity (61). A locking block (64) is rotatably connected to the surface of the rotating shaft (67). A compression elastic element (65) is fixedly connected to one side surface of the locking block (64). One end of the compression elastic element (65) is fixedly connected to the surface of the connecting cavity (61). A wedge-shaped groove (66) is opened on the bottom surface of the connecting end of the Y-shaped connecting pipe (3). The bottom end of the locking block (64) can be locked with the wedge-shaped groove (66).

4. The guidewire insertion device for neurointervention according to claim 3, characterized in that: The spiral feed assembly (7) includes an adjustment knob (71) rotatably connected to the top of the connecting cavity (61). The adjustment knob (71) has a hollow center and is fitted onto the surface of the microguide wire (5). A ring bevel gear (72) is fixedly connected to the bottom surface of the adjustment knob (71). A drive shaft (73) is rotatably connected to the inner wall of the connecting cavity (61).

5. The guidewire insertion device for neurointervention according to claim 4, characterized in that: A transmission bevel gear (74) is fixedly connected to the surface of the drive shaft (73), and a first conveyor frame (75) is fixedly connected to the center of the drive shaft (73). A medical silicone liner (76) is fixedly connected to the surface of the first conveyor frame (75).

6. The guidewire insertion device for neurointervention according to claim 5, characterized in that: The inner wall of the connecting cavity (61) is also slidably connected to a stretching frame (77), the end of the stretching frame (77) is fixedly connected to a butterfly elastic washer (78), the front end of the stretching frame (77) is rotatably connected to a second conveying frame (79), and the surface of the second conveying frame (79) is also provided with a medical silicone liner (76).

7. The guidewire insertion device for neurointervention according to claim 6, characterized in that: The inner wall of the adjustment knob (71) is slidably connected to a connecting bracket (710). One end of the connecting bracket (710) is fixedly connected to a roller telescopic elastic element (712). One end of the roller telescopic elastic element (712) is fixedly connected to the inner wall of the adjustment knob (71). The other end of the connecting bracket (710) is rotatably connected to a medical delivery roller (711). The surface of the medical delivery roller (711) is in contact with the surface of the microguide wire (5).

8. The guidewire insertion device for neurointervention according to claim 7, characterized in that: The variable diameter adapter assembly (8) includes an annular fixing base (81) fixedly connected to the inner wall surface of the end of the microcatheter (4). A second reset elastic element (82) is fixedly connected to the bottom surface of the annular fixing base (81). An annular sliding seat (83) is fixedly connected to the bottom of the second reset elastic element (82). The annular sliding seat (83) is slidably connected to the inner wall surface of the end of the microcatheter (4). A linkage rod (84) is rotatably connected to the inner wall of the end of the microcatheter (4).

9. The guidewire insertion device for neurointervention according to claim 8, characterized in that: One end of the linkage rod (84) is inserted into a variable diameter ring tube (87), which is fixedly connected to the open end of the microcatheter (4). The bottom surface of the annular sliding seat (83) is rotatably connected to a linkage swing rod (85), which is rotatably connected to the linkage rod (84). One end of the linkage swing rod (85) is rotatably connected to a transmission pull rod (86). A metal braided frame (88) is sleeved on the inner wall of the microcatheter (4), and one end of the transmission pull rod (86) is fixedly connected to the intersection of the metal braided frame (88).

10. The guidewire insertion device for neurointervention according to claim 9, characterized in that: Two traction ropes (89) are fixedly connected to the surface of the annular sliding seat (83). The two traction ropes (89) are arranged in a mirror image on the surface of the annular sliding seat (83). The traction ropes (89) are set inside the microcatheter (4). An installation block (810) is fixedly connected to one side surface of the connecting cavity (61). Multiple locking plates (811) are inserted around one end of the installation block (810). A knob bolt (812) is engaged on the surface of the multiple locking plates (811). One end of the microguide wire (5) passes through the installation block (810).

Images