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CN-122006079-A - Guide wire assembly and controllable bending guide wire

CN122006079ACN 122006079 ACN122006079 ACN 122006079ACN-122006079-A

Abstract

The invention particularly relates to a guide wire assembly and a controllable bending guide wire, wherein the guide wire assembly is used for vascular interventional operation and is provided with a proximal end and a distal end. The guide wire assembly is provided with a first bending section, a supporting section and a second bending section which are sequentially arranged from the proximal end face to the distal end. The inside of supporting section is provided with first control, and first control is used for being connected with wears to establish the first haulage rope in the seal wire subassembly, and the distal end of second bending section has the second control, and the second control is used for being connected with the second haulage rope that sets up in the seal wire subassembly and wears to first control. The guide wire assembly can form two bending sections with different bending directions and different bending angles at the proximal end and the distal end so as to accurately point to and enter small branch blood vessels with opening angles, and is beneficial to solving the problem of insufficient trafficability of the existing guide wire in interventional operation.

Inventors

  • ZHANG YISEN
  • YANG XINJIAN
  • JIN WEILIANG

Assignees

  • 首都医科大学附属北京天坛医院

Dates

Publication Date
20260512
Application Date
20260204

Claims (14)

  1. 1. A guidewire assembly for vascular interventional procedures, the guidewire assembly having a proximal end and a distal end, wherein the guidewire assembly has a first curved section, a support section and a second curved section disposed in sequence from the proximal end toward the distal end; The inside of supporting section is provided with first control, first control is used for being connected with wears to establish the first haulage rope in the seal wire subassembly, the distal end of second bending section has the second control, the second control is used for being connected with the second haulage rope that sets up in the seal wire subassembly and wears to pass first control.
  2. 2. The guidewire assembly of claim 1, wherein the guidewire assembly comprises a first tube having a plurality of grooves disposed on a circumferential surface thereof; The first tube body has a first region and a second region from the proximal end toward the distal end, the first region and the second region having different slot sizes, the first region forming the first curved section and the second region forming the support section.
  3. 3. The guidewire assembly of claim 2, wherein a first distance is provided between two adjacent slots along an axial direction of the first tube; the first region includes a plurality of nubs, the first spacing of the plurality of nubs gradually decreasing from the proximal end toward the distal end.
  4. 4. The guidewire assembly of claim 2, wherein a plurality of guides are disposed within the first tube, wherein a plurality of the guides are disposed at intervals along an axial direction of the first tube, and wherein the guides are configured to separate the first traction cable from the second traction cable.
  5. 5. The guidewire assembly of claim 1, further comprising a flexible assembly, a proximal end of the flexible assembly being connected to the support section, a distal end of the flexible assembly being connected with the first control to form the second curved section.
  6. 6. The guidewire assembly of claim 5, wherein the flexible assembly comprises a flexible sheath and a flexible support disposed inside the flexible sheath.
  7. 7. The guidewire assembly of claim 6, wherein the flexible assembly further comprises a developing member disposed within the flexible sheath and distal to the flexible support member.
  8. 8. The guidewire assembly of claim 1, wherein the first control has a first limiting channel for threading through the second traction cable and a first arcuate channel for receiving a portion of the first traction cable, and/or, The second control piece is arranged to be of a hemispherical structure, a second arched channel is arranged in the second control piece and used for accommodating the part of the second traction rope.
  9. 9. A controllable curved guidewire, comprising a control device and a guidewire assembly according to any one of claims 1-8, the control device comprising a control handle, a first pull rope, and a second pull rope, the first pull rope and the second pull rope both being threaded into the guidewire assembly.
  10. 10. The steerable curved guidewire of claim 9, wherein the control handle comprises a handle, and a first control assembly and a second control assembly disposed on the handle, the first control assembly being coupled to the first pull-cord, the second control assembly being coupled to the second pull-cord, and the first pull-cord passing through the second control assembly.
  11. 11. The steerable bend guidewire of claim 10, wherein the first control assembly comprises: a first curved runner rotatably disposed on the handle; the first transmission mechanism is in transmission connection with the first bending rotating wheel and is connected with the first traction rope; When the first bending rotating wheel rotates clockwise or anticlockwise, the first traction rope is wound and unwound through the first transmission mechanism so as to drive the first bending section to bend.
  12. 12. The steerable bend guidewire of claim 10, wherein the second control assembly comprises: a second curved runner rotatably disposed on the handle; The second transmission mechanism is in transmission connection with the second bending rotating wheel and is connected with the second traction rope; when the second bending rotating wheel rotates clockwise or anticlockwise, the second traction rope is wound and unwound through the second transmission mechanism so as to drive the second bending section to bend.
  13. 13. The steerable curved guidewire of claim 10, wherein the first control has a first arcuate channel, the first traction cable has a first knot and a second knot, the first traction cable passes through the first arcuate channel, and the first knot and the second knot are located at each end of the first arcuate channel; And/or the second control piece is provided with a second arched channel, the second traction rope is provided with a third rope knot and a fourth rope knot, the second traction rope passes through the second arched channel, and the third rope knot and the fourth rope knot are respectively positioned at two ends of the second arched channel.
  14. 14. The steerable curved guidewire of claim 9, wherein the first traction rope is a metal or polymeric structure and/or the second traction rope is a metal or polymeric structure; and/or the first haulage rope is of a single-strand structure or a multi-strand woven structure, and/or the second haulage rope is of a single-strand structure or a multi-strand woven structure.

Description

Guide wire assembly and controllable bending guide wire Technical Field The invention relates to the technical field of medical instruments, in particular to a guide wire assembly and a controllable bending guide wire. Background Microcatheters are key instruments in endovascular interventions for establishing delivery paths for catheters, balloons or stents and other instruments and guiding them to targeted lesion areas. In the field of nerve intervention, a micro-guide wire needs to realize super-selective intubation and enters into a torturous intracranial blood vessel, and the performance of the micro-guide wire directly influences the success and safety of an operation. The intracranial blood vessel has special anatomical structure that the thickness of the vessel wall is only one tenth of that of the peripheral blood vessel with the same caliber, and the vessel has high brittleness due to the lack of an external elastic layer and a complete muscle layer. Meanwhile, the blood vessels are hung on the surface of the brain, branches are easy to damage due to traction, paths are complicated to detour, and extremely high requirements are put on the trafficability and operability of the micro-guide wire. At present, the micro-guide wire commonly used in clinic mostly adopts a head end pre-shaping or manual shaping mode in operation. The operator needs to adjust the guide wire head end bending in real time under the guidance of DSA. The method has obvious limitations that the guide wire head end with a fixed shape has poor pointing property in the advancing process, and is easy to enter non-target branches by mistake in a blood vessel bifurcation area, so that repeated operation is caused, the operation time is prolonged, the radiation exposure of doctors and patients is increased, and the blood vessel spasm or injury can be induced due to mechanical stimulation. In addition, the head end after the shaping is liable to take place deformation or laxity in operation, further influences the precision of operation. The existing bending-adjustable guide wire realizes the distal bending adjustment by the traction of the core wire. The adjustable bend guide wire comprises a sleeve with higher proximal end rigidity and a sleeve with better distal end flexibility, and the distal end is bent by pulling the inner core wire. Although this structure achieves head end adjustability, the multi-layered sleeve and core wire movement mechanism also results in increased overall stiffness, with the problems of insufficient passability and poor compliance when passing through extremely tortuous intracranial vessels. In addition, frictional resistance between the core wire and the sleeve is increased in repeated bending operation, so that bending response sensitivity is reduced, and control accuracy and safety in complex blood vessels are affected. Disclosure of Invention The invention aims to at least solve the problem of insufficient trafficability of the existing guide wire in interventional operation. The aim is achieved by the following technical scheme: The first aspect of the invention provides a guide wire assembly for vascular interventional procedures, the guide wire assembly having a proximal end and a distal end, the guide wire assembly having a first curved section, a support section and a second curved section arranged in sequence from the proximal end toward the distal end; The inside of supporting section is provided with first control, first control is used for being connected with wears to establish the first haulage rope in the seal wire subassembly, the distal end of second bending section has the second control, the second control is used for being connected with the second haulage rope that sets up in the seal wire subassembly and wears to pass first control. According to the guide wire assembly, the guide wire assembly is arranged into the first bending section, the supporting section and the second bending section, and the first control piece and the second control piece are arranged to be matched with the first traction rope and the second traction rope in the guide wire assembly, so that two bending sections with different bending directions and different bending angles are formed at the proximal end and the distal end of the guide wire assembly, namely, a plurality of shapes (such as S-shaped) are formed at the head end of the guide wire assembly, and the guide wire assembly can accurately point to and enter small branch vessels with the opening angles of the small branch vessels, and is beneficial to solving the problem of insufficient trafficability of the conventional guide wire in interventional operations. Simultaneously, the risk of scraping and damaging the inner wall of the blood vessel in the implantation process of the guide wire assembly can be reduced, and the device is particularly suitable for operations such as tumor embolism and the like requiring accurate drug delivery. In addition, beca