CN-122004955-A - Magnetic-guided bidirectional docking system and method for vascular occlusion recanalization

CN122004955ACN 122004955 ACN122004955 ACN 122004955ACN-122004955-A

Abstract

The application discloses a magnetic guiding bidirectional docking system and a method for vascular occlusion recanalization, wherein the magnetic guiding bidirectional docking system for vascular occlusion recanalization comprises a first catheter, a second catheter, a third catheter, a micro-needle and a pushing component; the end part of the first conduit is provided with a first magnetic part, the end part of the second conduit is provided with a second magnetic part, the first magnetic part and the second magnetic part are attracted, the first conduit and the second conduit form an assembly channel for the third conduit to pass through, and the pushing component is used for driving the micro-needle to reciprocate along the annular channel. According to the application, the channels are respectively established from two sides of the target position and are placed into the first guide pipe and the second guide pipe, and the first magnetic piece and the second magnetic piece are mutually attracted to realize alignment. Then, the micro-needle is sent in from one of the catheters through the pushing component, so that the micro-needle accurately penetrates through the target position under the guidance of magnetic force and enters the contralateral catheter to form a guide wire passage, and the difficulty of traditional operation is effectively reduced.

Inventors

ZHOU AIQIANG
Tan Qianyuan
XIA HAIXIA
JIANG XIN

Assignees

深圳大学附属华南医院

Dates

Publication Date: 20260512
Application Date: 20260323

Claims (10)

1.A magnetically guided bi-directional docking system for vascular occlusion recanalization, comprising: The device comprises a first guide pipe and a second guide pipe, wherein a first magnetic piece is arranged at the end part of the first guide pipe, a second magnetic piece is arranged at the end part of the second guide pipe, and the first magnetic piece and the second magnetic piece are attracted; The first guide pipe and the second guide pipe form an assembly channel, and the assembly channel is used for the third guide pipe to pass through; the micro-threading needle is arranged in the annular channel in a telescopic way; The pushing component is connected with the micro-threading needle and used for driving the micro-threading needle to reciprocate along the annular channel.
2. The bi-directional magnetic guide docking system for vascular occlusion recanalization of claim 1, wherein the third catheter is hollow, forming a first channel, the micro-needle is hollow, forming a second channel, the first channel and the second channel are in communication for a guidewire to pass through.
3. The magnetically guided bi-directional docking system for vascular occlusion recanalization of claim 2, wherein the pushing assembly comprises: the assembly part is connected with the third conduit, is hollow and is provided with a mounting cavity, and is provided with a chute; One end of the first connecting piece is connected with the micro-threading needle, and the other end of the first connecting piece extends to the mounting cavity and is connected with the second connecting piece; and one end of the push rod penetrates through the sliding groove and is rigidly connected with the second connecting piece.
4. The magnetically guided bi-directional docking system for vascular occlusion recanalization of claim 3, wherein the first connector is configured as any one of a nickel-titanium alloy, a platinum-iridium alloy, or an aluminum alloy.
5. The magnetically guided bi-directional docking system for vascular occlusion recanalization of claim 4, wherein the end of the fitting proximal to the third catheter is provided with a fitting hole through which the first connector extends into the mounting cavity.
6. The magnetically guided bi-directional docking system for vascular occlusion recanalization of claim 5, wherein the fitting is provided with a third channel, the third channel in communication with the first channel.
7. The magnetic guidance bi-directional docking system for vascular occlusion recanalization of claim 1, wherein a third magnetic element is disposed at an end of the micro-needle, wherein the third magnetic element attracts the first magnetic element, or wherein the third magnetic element attracts the first magnetic element.
8. The magnetically guided bi-directional docking system for vascular occlusion recanalization of claim 7, wherein the sum of the lengths of the micro-needle and the third catheter is greater than the length of the first catheter, and/or the sum of the lengths of the micro-needle and the third catheter is greater than the length of the second catheter.
9. The magnetically guided bi-directional docking system for vascular occlusion recanalization of claim 1, wherein a first marker is provided on the first catheter at an end proximal to the first magnetic element and a second marker is provided on the second catheter at an end proximal to the second magnetic element, wherein the first marker and the second marker are configured to guide the first catheter and the second catheter into alignment with each other.
10. A docking method of a magnetically guided bi-directional docking system for vascular occlusion recanalization according to any of the claims 1-9, characterized by the steps of: establishing channels at two sides of a target position, and respectively placing the channels into the first guide pipe and the second guide pipe until the first magnetic piece and the second magnetic piece are oppositely arranged and form magnetic alignment; placing a third catheter into the distal end of the first catheter or the distal end of the second catheter, driving the pushing assembly, and driving the micro-needle to extend out of the annular channel until the micro-needle extends into the magnetic area of the first magnetic element or the magnetic area of the second magnetic element; the pushing assembly is continued until the micro-needle enters the lumen of the contralateral second catheter or first catheter, establishing a guidewire pathway.

Description

Magnetic-guided bidirectional docking system and method for vascular occlusion recanalization Technical Field The invention relates to the technical field of medical equipment, in particular to a magnetic guiding bidirectional docking system and method for vascular occlusion recanalization. Background In the field of interventional medicine, the treatment of artificial arteriovenous fistula (AVF) or Chronic Total Occlusion (CTO) lesions of blood vessels is a very challenging task. At present, a bidirectional technology of combining a forward guide wire with a reverse guide wire is often used for interventional recanalization in clinic, and the key point of the method is that the successful kissing of the forward guide wire and the reverse guide wire in an occlusion section is realized, so that the reverse guide wire enters a forward guide tube. However, because such lesions are often accompanied by complications such as uneven atherosclerotic plaque composition, severe calcification, longer occlusion, and tortuosity of anatomy, it is difficult in practice for the guidewire to pass from a single direction by conventional "push-rotate" procedures. In the bidirectional operation process, even if the forward and reverse guide wires reach the same blood vessel section, the forward and reverse guide wires are often difficult to accurately butt joint due to being positioned on different space planes, and the forward and reverse guide wires are often 'shouldered over'. Meanwhile, the whole operation process has obvious blindness, and an operator cannot view the position of the end of the thread guide head in the lesion in real time, and mainly relies on experience and fortune to try, so that the success rate is low and the time consumption is long. The method not only reduces the operation efficiency, prolongs the radiation exposure time of both doctors and patients, but also increases the risk of the guide wire penetrating into the subintima of the blood vessel and even causing serious complications such as perforation, interlayer and the like of the blood vessel. Accordingly, the prior art is still in need of improvement. Disclosure of Invention In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a magnetic guiding bidirectional docking system and method for vascular occlusion recanalization, which are capable of forming a guide wire passage by mutually matching a first catheter, a second catheter and a micro-needle, thereby effectively reducing the difficulty of the conventional operation and solving the shortcomings of the prior art. The application provides a magnetic guiding bidirectional docking system and a method for vascular occlusion recanalization, which adopt the following technical scheme: a magnetically guided bi-directional docking system for vascular occlusion recanalization, comprising: The device comprises a first guide pipe and a second guide pipe, wherein a first magnetic piece is arranged at the end part of the first guide pipe, a second magnetic piece is arranged at the end part of the second guide pipe, and the first magnetic piece and the second magnetic piece are attracted; The first guide pipe and the second guide pipe form an assembly channel, and the assembly channel is used for the third guide pipe to pass through; the micro-threading needle is arranged in the annular channel in a telescopic way; The pushing component is connected with the micro-threading needle and used for driving the micro-threading needle to reciprocate along the annular channel. Optionally, the magnetic guiding bidirectional docking system for vascular occlusion recanalization is characterized in that the third catheter is hollow and is provided with a first channel, the micro-needle is hollow and is provided with a second channel, and the first channel and the second channel are communicated and used for a guide wire to pass through. Optionally, the magnetically guided bi-directional docking system for vascular occlusion recanalization, wherein the pushing assembly comprises: the assembly part is connected with the third conduit, is hollow and is provided with a mounting cavity, and is provided with a chute; One end of the first connecting piece is connected with the micro-threading needle, and the other end of the first connecting piece extends to the mounting cavity and is connected with the second connecting piece; and one end of the push rod penetrates through the sliding groove and is rigidly connected with the second connecting piece. Optionally, the magnetic guiding bidirectional docking system for vascular occlusion recanalization, wherein the first connecting piece is any one of nickel-titanium alloy, platinum-iridium alloy or aluminum alloy. Optionally, the magnetic guiding bidirectional docking system for vascular occlusion recanalization, wherein an end of the fitting close to the third catheter is provided with a fitting hole, and the first connector ex