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Endovascular anchoring catheter

A catheter and anchoring technology, applied in the field of intraluminal anchoring catheters and intraluminal interventional devices, can solve the problems of not being able to ensure the central position of the opening of the puncture point, unable to find the puncture point retrogradely, and difficult to puncture the membrane, and achieve savings. Operation time, improve the accuracy of puncture, prevent the effect of retraction

Pending Publication Date: 2019-06-07
HANGZHOU WEIQIANG MEDICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this technical solution is that the puncture point cannot be guaranteed to be at the center of the opening of the branch vessel; there is no guide wire cavity, even if the puncture and expansion are successful, it will be difficult to exchange the guide wire, and the puncture point cannot be retrogradely found
In this technology, the positioning of the puncture needle is improved to a certain extent by the aid of the anchoring balloon. The disadvantage of this solution is that the force of the puncture needle to puncture the membrane is usually 3-7N, so that during the puncture, the puncture needle cannot There is a reverse withdrawal force, and the balloon has a relatively smooth surface, which is prone to axial displacement on the smoother vessel wall, resulting in continuous withdrawal of the puncture needle and difficulty in puncturing the membrane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The intraluminal anchoring catheter provided in Embodiment 1 of the present invention is used to assist puncture to puncture the membrane of a stent-graft. The puncture needle can be movably set in the intraluminal anchoring catheter to realize the delivery, guidance and positioning of the puncture needle.

[0043] See figure 1 , the intraluminal anchoring catheter includes a hollow catheter tube body 100 and an anchor member 200 disposed at the distal end of the catheter tube body 100 . A puncture needle (not shown) is movably inserted in the catheter tube 100 . The anchor 200 expands radially outward from the catheter tube 100 in a natural state. After being expanded, the anchor 200 can be supported on the inner wall of the blood vessel to limit the radial movement of the catheter tube body 100 and the puncture needle passing through the catheter tube body 100 . Therefore, after the puncture needle passes through the distal opening of the catheter tube body 100, th...

Embodiment approach

[0051] Such as figure 1 As shown, the first embodiment: the distal end of the anchor 200 is fixed at the distal nozzle of the catheter tube body 100, and a plurality of braided wire ends 230 are arranged around the tube wall of the catheter tube body 100 distal nozzle, Thus, the distal nozzle of the catheter tube body 100 can form a through hole 250, which is a puncture hole through which the needle of the puncture needle passes. Each braided wire starts from the end 230 fixed on the distal nozzle of the catheter tube body 100, first extends to the outer side of the distal end, and reverses after reaching the inner wall 900 of the blood vessel, so that the side wall 210 of the anchor 200 supports the blood vessel On the inner wall 900, a stable anchor and support is formed. The proximal end of the anchor 200 can be set as a free end 220, that is, the proximal end of each braided wire does not have to be fixed on the catheter tube body 100, so as to form a columnar or disc-sha...

Embodiment 2

[0056] The structure of the intraluminal anchoring catheter in the second embodiment is basically the same as the structure of the intraluminal anchoring catheter in the first embodiment, the difference is that the anchor 300 in the second embodiment consists of a Consists of multiple rods. Specifically, the structure of the anchor 300 has multiple implementations, as follows:

[0057] Such as Figure 6-9 As shown, the first embodiment is: the anchor 300 is composed of a plurality of struts 301 arranged axially symmetrically at the distal end of the catheter tube body 100 , and each strut 301 extends from the distal end of the catheter tube body 100 to the surroundings. Each support rod 301 can be a straight rod, or have a certain curvature after heat-setting treatment. Each strut 301 extends around from the distal end of the catheter tube body 100 and is supported on the inner wall 900 of the blood vessel. The end of each strut 301 is fixed on the distal end of the cathete...

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PUM

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Abstract

The invention discloses an endovascular anchoring catheter. The endovascular anchoring catheter includes a hollow catheter body and an anchoring member arranged on a distal end of the catheter body. The anchoring member expands radially outward from the catheter body in a natural state. The anchoring member is provided with a through hole which is coaxial with an opening at the distal end of the catheter body. The anchoring member is provided with at least one aperture axially passing through the anchoring member. The cavity of the endovascular anchoring catheter provides an access for other instruments. An anchoring device at the distal end of the catheter can limit radial deviation of the catheter and the instruments in the catheter and does not affect normal circulation of blood of a vessel in which the endovascular anchoring catheter is placed.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to an intracavity interventional device, in particular to an intracavity anchoring catheter. Background technique [0002] With the continuous development of endovascular reconstruction surgery, the application of covered stents is also increasing. However, the use of covered stents in some special parts will affect the blood supply of arterial branch vessels. Such as: aortic arch, celiac trunk, bilateral renal artery and superior mesenteric artery, etc., the application of stent grafts in these parts is greatly limited. In the prior art, it is usually adapted to individual patient differences through improvement of surgical methods (such as hybrid surgery) or improvement of instruments (such as modular stents, pre-fenestrated stents, branch stents, and multi-layer bare stents). However, for most cases of aortic arch lesions, due to the extremely complex anatomical structure of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/07A61B17/34
Inventor 李阳张庭超
Owner HANGZHOU WEIQIANG MEDICAL TECH CO LTD
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