CN111166398A

CN111166398A - Positive and negative guide wire magnetic kissing system for coronary artery occlusion intervention

Info

Publication number: CN111166398A
Application number: CN202010107200.2A
Authority: CN
Inventors: 吴岳; 李铤; 王子溪
Original assignee: Xian Jiaotong University
Current assignee: Xian Jiaotong University
Priority date: 2020-02-21
Filing date: 2020-02-21
Publication date: 2020-05-19
Anticipated expiration: 2040-02-21
Also published as: CN111166398B

Abstract

A set of forward and backward guide wire magnetic kissing systems for coronary artery occlusion intervention comprises a micro-catheter used for being matched with a forward guide wire and a backward guide wire used for backward technology; the braided wire winding layers at the head end and part of the rod part of the microcatheter are made of permanent magnetic materials or materials adsorbed by the reverse guide wires; the guide wire is added with a permanent magnetic material or a metal material which can be adsorbed by the micro catheter in the manufacturing process; the invention utilizes the characteristics of magnetic force, keeps the shapes and the outer coating of the traditional guide wire and the microcatheter, and improves the materials of the microcatheter matched with the forward guide wire and the reverse guide wire used for the reverse technology, so that the reverse guide wire can gradually get close to the position of the forward microcatheter under the magnetic force adsorption of the forward microcatheter in the pushing process, the risk that the reverse guide wire penetrates into the blood vessel endothelium and even causes the blood vessel perforation in the traditional operation process is reduced, the success rate of the reverse guide wire to the anastomosis and the operation safety are improved, the operation difficulty is greatly reduced, the operation time is obviously shortened, and the pain of a patient is reduced.

Description

Positive and negative guide wire magnetic kissing system for coronary artery occlusion intervention

Technical Field

The invention belongs to the technical field of medical equipment, and particularly relates to a set of forward and backward guide wire magnetic anastomosis system for coronary artery occlusion intervention.

Background

The management of chronic total occlusion of coronary arteries is a common clinical problem. The clinical interventional therapy usually adopts a forward guide wire and reverse guide wire combined technology to carry out interventional recanalization therapy, and the key step is that forward and reverse guide wires are anastomosed, so that the reverse guide wires enter into a forward guide catheter. Due to the reasons of uneven component texture, combined calcification, longer occlusion section and the like of atherosclerotic plaques, the retrograde guidewire and the forward guidewire are often in different spatial planes when reaching the overlapped blood vessel section in the actual operation process, so that the anastomosis is difficult, and meanwhile, the retrograde guidewire also has the risk of penetrating into the blood vessel under the endothelium and even causing the perforation of the blood vessel in the pushing process. Therefore, the operator needs to spend a lot of time on the anastomosis process of the retrograde guide wire, the forward guide wire and the microcatheter, which not only increases the operation difficulty and risk, but also increases the pain of the patient.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a group of forward and backward guide wire magnetic anastomosis system for coronary artery occlusion intervention, which can assist a backward guide wire to gradually draw close to a forward micro catheter position in a pushing process by means of magnetic force, thereby greatly reducing the operation difficulty, reducing the operation time and improving the operation safety.

In order to achieve the purpose, the invention adopts the technical scheme that:

a set of forward and backward guide wire magnetic kissing systems for coronary artery occlusion intervention comprises a micro-catheter 1 used for being matched with a forward guide wire 13 and a backward guide wire 2 used for backward technology;

the micro catheter 1 consists of a head end 3, a rod part 4, a magnetic exposed part 5, a control handle 7 and a catheter connecting end 8 which are connected in sequence; the weaving wire winding layers of the head end 3 and part of the rod part 4 are made of permanent magnetic materials or materials which can be absorbed by the reverse guide wire 2;

the reverse guide wire 2 is added with permanent magnetic material or metal material which can be absorbed by the micro-catheter 1 during the manufacturing process.

The permanent magnet material comprises a ferrite material, a samarium cobalt material, a neodymium iron boron material or an aluminum nickel cobalt.

The tail end of the rod part 4 is provided with a magnetic exposed part 5 and a connecting metal sheet 6, and if the magnetism is insufficient, the magnetic device 9 can be externally connected to increase the magnetic force.

The invention utilizes the characteristics of magnetic force, and improves the material of the microcatheter matched with the forward guide wire or the reverse guide wire used for the reverse technology, so that the reverse guide wire can gradually approach to the position of the microcatheter under the magnetic force adsorption of the forward microcatheter in the pushing process, thereby reducing the risk that the reverse guide wire penetrates into the blood vessel endothelium and even causes blood vessel perforation in the traditional operation process, improving the success rate of reverse anastomosis of the guide wire and the operation safety, greatly reducing the operation difficulty, obviously shortening the operation time and reducing the pain of patients.

Drawings

Fig. 1 is a schematic view of the general structure of a microcatheter 1 of the present invention.

Fig. 2 is a schematic view of the structure of the tip 3 and the shaft 4 of the microcatheter of the present invention.

Fig. 3 is a schematic structural diagram of an external electromagnetic device according to the present invention.

Fig. 4 is a schematic view of the construction of a retrograde guidewire 2 of the present invention.

Fig. 5 is a schematic view showing a state in which the guidewire 2 is gradually drawn toward the micro-catheter 1 by magnetic attraction.

Detailed Description

The invention is explained in more detail below with reference to the drawings.

Referring to fig. 1, a set of forward and backward guide wire magnetic kissing systems for coronary artery occlusion intervention comprises a micro-catheter 1 for cooperating with a forward guide wire 13 and a backward guide wire 2 for backward technique.

The structure of the micro catheter 1 is similar to that of the existing common micro catheter, and consists of a head end 3, a rod part 4, a magnetic exposed part 5, a control handle 7 and a catheter connecting end 8 which are connected in sequence; referring to fig. 2, the head 3 is a cone, and the outermost layers of the head 3 and the rod 4 are provided with threads to improve the working efficiency of the micro-catheter, which is different from the conventional common micro-catheter structure: the middle layer of the head end 3 and part of the rod part 4 is a woven wire winding layer, and the woven wire winding layer is made of a permanent magnet material or a metal material capable of being adsorbed by the reverse guide wire 2.

Referring to fig. 4, the retrograde guidewire 2 is manufactured by adding a permanent magnetic material capable of being adsorbed by the micro-catheter 1 or a metal material capable of being adsorbed by the micro-catheter 1, and the coating of the external layer is the same as the existing material.

The tail end of the rod part 4 is provided with a magnetic exposed part 5 and a connecting metal sheet 6, and if the magnetism between the microcatheter 1 and the reverse guide wire 2 is insufficient, the magnetic force can be increased by externally connecting an electromagnetic device 9. The metal sheet 6 is a metal capable of passing magnetism, such as iron, nickel, silicon steel, etc.

Referring to fig. 3, the external electromagnetic device 9 is composed of an electric clip 10, a connecting wire 11 and an electromagnetic starting device 12 which are connected in sequence, when in use, the clip 10 is clipped on the metal sheet 6, and the electromagnetic starting device 12 is started.

The working principle of the invention is as follows:

referring to fig. 5, in the interventional therapy process, the micro-catheter 1 carries the forward guide wire 13 to reach the coronary artery chronic total occlusion proximal fiber cap 14 and pushes the forward guide wire to the far end as far as possible, the reverse guide wire 2 reaches the coronary artery chronic total occlusion distal fiber cap 16 through the side branch blood vessel 15 and enters an occlusion lesion, and when the position of the reverse guide wire 2 is close to the micro-catheter 1, the reverse guide wire is attracted by the magnetic force of the micro-catheter 1 and gradually approaches to the position of the micro-catheter in the pushing process until the reverse guide wire is anastomosed. After anastomosis, the forward micro catheter 1 slowly exits, the reverse guide wire 2 slowly advances, and finally the reverse guide wire 2 successfully enters the catheter 17 until the reverse guide wire completely passes out of the body from the forward catheter (in vitro), so that a track is established in chronic complete occlusion lesions, and subsequent balloon expansion and stent implantation are facilitated.

The invention utilizes the characteristics of magnetic force, keeps the shapes and the outer coating of the traditional guide wire and the microcatheter, and improves the materials of the microcatheter matched with the forward guide wire and the reverse guide wire used for the reverse technology, so that the reverse guide wire can gradually get close to the position of the forward microcatheter under the magnetic force adsorption of the forward microcatheter in the pushing process, thereby reducing the risk that the reverse guide wire penetrates into the vascular endothelium and even causes vascular perforation in the traditional operation process, improving the success rate of guide wire reverse kiss and the operation safety, greatly reducing the operation difficulty, obviously shortening the operation time and reducing the pain of patients.

Claims

1. A set of forward and backward guide wire magnetic kissing systems for coronary artery occlusion intervention comprises a micro-catheter (1) matched with a forward guide wire (13) and a backward guide wire (2) for backward technology; the micro catheter (1) consists of a head end (3), a rod part (4), a magnetic exposed part (5), a control handle (7) and a catheter connecting end (8) which are connected in sequence; the weaving and winding layer of the head end (3) and part of the rod part (4) is made of permanent magnetic material or material which can be absorbed by the reverse guide wire (2) by processing and forming; the magnetic guide wire (2) is added with a permanent magnetic material or a metal material which can be adsorbed by the magnetic micro catheter (1) in the manufacturing process.

2. The set of forward/retrograde guidewire magnetic anastomosis system for coronary occlusion intervention of claim 1, wherein the permanent magnetic material comprises a ferrite material, a samarium-cobalt material, a neodymium-iron-boron material, or an alnico material.

3. The group of positive and negative guide wire magnetic kissing systems for coronary artery occlusion intervention according to claim 1, wherein the tail end of the rod part (4) is provided with a magnetic exposed part (5) and a connecting metal sheet (6) thereof, and if the magnetism is insufficient, an electromagnetic device (9) can be externally connected to increase the magnetic force.