CN113729858A

CN113729858A - Micro guide wire for capturing foreign matters in blood vessel and conveying catheter

Info

Publication number: CN113729858A
Application number: CN202111151470.4A
Authority: CN
Inventors: 王利
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2021-12-03
Anticipated expiration: 2041-09-29
Also published as: CN113729858B

Abstract

The invention discloses a micro guide wire for capturing foreign matters in blood vessels and conveying catheters, which comprises: the outer guide wire and the inner guide wire, one end of the outer guide wire is fixedly connected with the control handle, the other end of the outer guide wire is in contact with the outer guide wire at the end of the non-fixed connection head, the inner guide wire is placed on the inner side of the outer guide wire in a sliding mode, and the surrounding section is arranged at the end, close to the head end, of the inner guide wire. Provided is a technology for manually controlling the soft distal loop forming of a micro-guide wire, which can more easily reach a distal target position through a foreign body and take out the foreign body. Meanwhile, the guide wire can be tightly attached to the vessel wall after the distal end is formed into a loop, so that a certain supporting force is provided, and the microcatheter can conveniently and smoothly reach a distal end target position.

Description

Micro guide wire for capturing foreign matters in blood vessel and conveying catheter

Technical Field

The invention relates to the field of medical appliances, in particular to a micro guide wire for capturing foreign matters in blood vessels and conveying catheters.

Background

At present, the endovascular intervention treatment is widely used for heart and cerebral blood diseases. The removal of intravascular foreign bodies is a practical problem often faced by physicians during therapeutic practices, such as intravascular emboli pulling, removal of escape coils, and the like. The current tools for removing foreign bodies in clinic commonly comprise a stent, a balloon and the like, and other skills. There is a common feature of these procedures, which requires a microcatheter to be passed through the foreign body to the distal vessel and then the removal of the foreign body is accomplished in conjunction with the microcatheter. However, when a small blood vessel is reached or some special foreign body is encountered, the micro-catheter is difficult to pass through the foreign body, which is a common cause of operation failure. In addition, in some tortuous vascular aneurysm treatments, insufficient support of the micro-guide wires often occurs, so that the micro-catheter cannot cross over the neck of the aneurysm or protrude into the aneurysm, and the operation fails or even the aneurysm is ruptured, which causes serious adverse effects.

The foreign body material commonly used at present is a bracket, a saccule and the like. The patent web discloses inventions: a spring ring escape capturing device is mainly used for tying the head end of a micro wire guide head to the head end of a micro catheter to take out an escape spring ring. The current methods have the commonality that a microcatheter is needed to reach a far-end blood vessel through foreign matters, the difficulty of passing the microcatheter through the foreign matters is one of the main reasons for the failure of treatment, and no scheme for directly taking out the foreign matters by using a microcatheter exists at present.

Disclosure of Invention

In view of the above-mentioned shortcomings in the prior art, the present invention provides a micro-guidewire for capturing intravascular foreign bodies and delivering catheters, and provides a technique for manually controlling the soft distal loop of the micro-guidewire, so that the micro-guidewire can more easily reach a distal target position through a foreign body and take out the foreign body. Meanwhile, the guide wire can be tightly attached to the vessel wall after the distal end is formed into a loop, so that a certain supporting force is provided, and the microcatheter can conveniently and smoothly reach a distal end target position.

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

a micro-guide wire for capturing foreign bodies in blood vessels and conveying catheters comprises: the outer guide wire and the inner guide wire, one end of the outer guide wire is fixedly connected with the control handle, the other end of the outer guide wire is in contact with the outer guide wire at the end of the non-fixed connection head, the inner guide wire is placed on the inner side of the outer guide wire in a sliding mode, and the surrounding section is arranged at the end, close to the head end, of the inner guide wire.

Preferably, the surrounding section is located at the contact position of the head end outer guide wire and the outer guide wire, and the inner guide wire can be placed outside the outer guide wire when the inner guide wire is pulled.

The invention has the beneficial effects that:

provided is a technology for manually controlling the soft distal loop forming of a micro-guide wire, which can more easily reach a distal target position through a foreign body and take out the foreign body. Meanwhile, the guide wire can be tightly attached to the vessel wall after the distal end is formed into a loop, so that a certain supporting force is provided, and the microcatheter can conveniently and smoothly reach a distal end target position.

The problem that the micro catheter is difficult to smoothly cross foreign bodies to cause treatment failure is solved; the problem that the existing micro guide wire cannot provide effective support and the micro catheter cannot reach a far-end ideal position is solved; the problem of current instrument expensive promptly the operation difficulty promptly namely failure rate is high is solved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of a first use of a micro-guidewire of the present invention;

FIG. 3 is a schematic diagram of a second use of the micro-guidewire of the present invention;

FIG. 4 is a schematic diagram of a third use of a micro-guidewire of the present invention;

reference symbol comparison table:

1-control handle, 2-external guide wire, 3-internal guide wire, 4-head end external guide wire, 5-surrounding section, 6-vessel wall, 7-microcatheter and 8-intraductal foreign body.

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

In order to make the content of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

As shown in fig. 1 to 4, a micro guidewire for capturing intravascular foreign objects and delivering catheters comprises: outer seal wire 2 and

interior seal wire

3, 2 one end fixed connection control handle 1 of outer seal wire, 2 other ends contact unfixed connector end outer seal wire 4 of outer seal wire, 2 inboard slides and places interior seal wire 3 of outer seal wire, interior seal wire 3 is close to the outer seal wire 4 end of head end and is equipped with encircleing section 5.

The surrounding section 5 is positioned at the contact position of the head end outer guide wire 4 and the outer guide wire 2, and when the inner guide wire 3 is pulled, the inner guide wire 3 can be arranged outside the outer guide wire 4.

The other end of the outer guide wire 2 contacts the outer guide wire 4 at the end of the unfixed connecting head: in some specific cases, when the outer guide wire is tightened and looped, the outer guide wire may not be withdrawn from the blood vessel, and the inner guide wire may be broken by human, so that the distal loop loses the traction of the inner guide wire and is easily pulled out of the body.

Example 1: as shown in fig. 2: first use of micro-wires: when intraductal foreign matter 8 (for example thrombus, spring coil etc.) exists in vascular wall 6, outer seal wire is softer texture, when interior seal wire was taken out outward and is shortened, and outer seal wire can take place the circle in the blood vessel and become bent, forms the tong "pan", pastes on the vascular wall, will interior seal wire and outer seal wire pumpback simultaneously this moment, locates the vascular foreign matter chucking at microcatheter 7, and it is external with all pulls out again together such as vascular foreign matter, interior seal wire, outer seal wire, microcatheter.

Example 2: as shown in fig. 3: second use of micro-wires: when the inner guide wire 3 and the outer guide wire 2 in the invention jointly form a closed ring or a ring in a blood vessel, the other micro guide wire 9 passes through the ring or the ring, then the other micro guide wire 9 is withdrawn and simultaneously matched with the microcatheter, the micro guide wire 9 is locked at the head end of the microcatheter, a new closed ring is formed at the moment, the foreign matter is lassed in the ring, then the guide wire catheter system is rotated to tightly wind the foreign matter, and simultaneously the guide wire and the catheter system are withdrawn and are pulled out of the body together with the foreign matter.

Example 3: as shown in fig. 4: a third use of the micro-guidewire: outer seal wire 2 and interior seal wire 3 carry little pipe support pipe as supporting the seal wire, when interior seal wire 3 withdraws, outer seal wire 2 takes place to curl in the blood vessel, the increase frictional force is hugged closely with the vascular wall to curled portion, proper withdrawal outer seal wire, outer seal wire can form certain tension in the blood vessel this moment, provide sufficient holding power for little pipe along the in-process that little 2 pipe of seal wire carried, in order to ensure that little pipe can reach distal end blood vessel through the aneurysm neck smoothly, avoid it to cause the aneurysm to break in the aneurysm chamber 10 and bleed, effectively improve the operation success rate, reduce complications such as the aneurysm bleeding of breaking.

The hardness of the head end of the guide wire is different from that of the lower part of the guide wire, the head end is soft, the injury of blood vessels in the operation process can be avoided, and the lower part is hard and convenient to control. The outer diameters of the inner guide wire control handle and the outer guide wire are the same, and the control handle and the outer guide wire can control the tension through a torsion controller; the guide wire is fine and thin, memory rebounds, a folded angle is not easy to form, the coating is smooth, and the connecting part of the inner guide wire and the outer guide wire at the head end can be separated.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A micro guide wire for capturing foreign matters in blood vessels and conveying catheters is characterized by comprising: outer seal wire (2) and interior seal wire (3), outer seal wire (2) one end fixed connection control handle (1), outer seal wire (2) other end contact is unset and is connected outer seal wire (4) of head end, seal wire (3) in outer seal wire (2) inboard sliding placement, interior seal wire (3) are close to the outer seal wire (4) end of head end and are equipped with and encircle section (5).

2. The micro guidewire for capturing intravascular foreign objects and delivering catheters according to claim 1, wherein: the surrounding section (5) is located at the contact position of the head end outer guide wire (4) and the outer guide wire (2), and when the inner guide wire (3) is pulled, the inner guide wire (3) can be placed on the outer side of the outer guide wire (4).