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Aortic dissection breach plugging device

A technology of aortic dissection and occlusion device, which is applied in the field of medical devices and can solve the problems of cutting the false lumen wall, not mentioning fixing the rip occluder, rupture, etc.

Active Publication Date: 2015-10-28
SECOND MILITARY MEDICAL UNIV OF THE PEOPLES LIBERATION ARMY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this invention also has its drawbacks: firstly, the invention does not mention any means of fixing the rip occluder
At the breach of aortic dissection, high-speed blood flow flows from the true lumen through the breach into the false lumen. If the occluder cannot be effectively anchored at the breach, it is very likely that the occluder will be rushed into the false lumen by the blood flow, and its sharp The tip may cut through the wall of the false lumen and cause it to rupture, and the patient may die due to hemorrhagic shock in a short period of time; secondly, the occluder proposed by this invention is released and expanded in the false lumen, and the sandwiched false lumen The wall is only a thin layer of medial and adventitia of the aortic wall, and dilation in the false lumen itself has a certain risk of bursting the false lumen
Therefore, although this invention proposes the idea of ​​targeting the closure of the dissection gap, there are obvious design deficiencies in clinical application.

Method used

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  • Aortic dissection breach plugging device
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Examples

Experimental program
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Effect test

Embodiment 1

[0022] Such as figure 1 As shown, the present invention is a kind of aortic dissection breach closure device, comprising a bare stent main body 1, a side branch sheath 2 and a side branch 3 compressed in the side branch sheath 2; the side branch 3 is also compressed Including spring ring 4 and spring ring micro-villi 5; one end of spring ring 4 is anchored on the outer surface of bare stent body 1 by connecting ring 8; spring ring micro-villi 5 is attached to spring ring 4; the outer surface of bare stent main body The distal and proximal ends of the upper connecting ring 8 are provided with blocking positioning points 9; the outer edges of the distal and proximal ends of the bare stent main body 1 are respectively provided with four main body positioning points 10; the outer ends of the lateral sheath 2 are connected with traction guide wires 11 .

[0023] Among them, the bare stent main body 1 can be made by laser engraving technology or braiding process; the side branch sh...

Embodiment 2

[0026] Such as figure 2 As shown, the present invention is a kind of aortic dissection breach closure device, comprising a bare stent main body 1, a side branch sheath 2 and a side branch 3 compressed in the side branch sheath 2; the side branch 3 is also compressed It includes a steel wire 6 and a spongy plug 7; one end of the steel wire 6 is anchored to the outer surface of the bare stent body 1 through a connecting ring 8; the spongy plug 7 is attached to the steel wire 6.

[0027] Among them, the bare stent main body 1 can be made by laser engraving technology or weaving process; the side branch sheath 2 adopts a slender circular tubular structure, and the sponge-like blockage 7 is short and thick in the natural state, and its diameter is larger than that of the side branch sheath 2, the spongy occluder 7 is compressed in the side sheath 2 in the compressed state; the spongy occluder 7 can be made of medical high-resilience materials, such as high-density polyvinyl alcoho...

Embodiment 3

[0030] An aortic dissection breach closure device, the rest of which are the same as in Example 2. The patient's aortic dissection breach is located at the 5 mm distal end of the left subclavian artery, the breach diameter is 3 mm, and the diameter of the proximal aneurysm neck is 35 mm.

[0031] In order to obtain sufficient radial force to anchor on the inner wall of the blood vessel after the bare stent body 1 is released, the caliber of the bare stent body should exceed the diameter of the proximal aneurysm neck by 10%-20%, so the bare stent body 1 with a caliber of 40mm is selected. In order to make the caliber of the spongy occluder 7 larger than the diameter of the aortic dissection breach after release, select the spongy occluder 7 with a caliber of 6mm in the natural state; in order to make the side branch outer sheath 2 pass through the aortic dissection breach smoothly , choose the side branch outer sheath 2 with a caliber of 2.5mm; since the side branch 3 is anchored ...

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Abstract

The invention relates to the technical field of medical instruments, and provides an aortic dissection breach plugging device which comprises a bare stent main body (1), a side stent sheath (2) and a plugging side stent (3) compressed in the side stent sheath (2), wherein the plugging side stent (3) further comprises a spring ring (4) and spring ring tiny fluff (5), or the plugging side stent (3) further comprises a steel wire (6) and a spongy plugging object (7). According to the invention, the plugging side stent is fixed to a dissection breach and effectively plugs the breach, so the condition that blood enters a pseudocoele, and organization and absorption of the pseudocoele thrombus are induced is avoided.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a occluding device for aortic dissection breach. Background technique [0002] Aortic dissection refers to the blood in the aortic lumen enters the aortic media from the aortic intima tear, separates the media, and expands along the long axis of the aorta, thus forming a true and false aortic cavity. a pathological change. The main harm is that the direct rupture of the false lumen or the rupture after the formation of an aneurysm will cause massive hemorrhage and death, and in the process of dissection formation, the formation of dissection is likely to interrupt the blood supply of important branches of the aorta, resulting in severe ischemia of important organs and even death. Loss of function, causing serious complications or death. [0003] With the development of science and technology, the development of new materials and the innovation of micro-processing techno...

Claims

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Application Information

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IPC IPC(8): A61F2/02A61B17/00
Inventor 陆清声景在平张勇学
Owner SECOND MILITARY MEDICAL UNIV OF THE PEOPLES LIBERATION ARMY