A kind of aortic dissection breach closure device

A technology of aortic dissection and occlusion device, which is applied in the field of medical devices and can solve problems such as rupture of false lumen, insufficient design of clinical application, rupture, etc.

Active Publication Date: 2017-12-01
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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  • A kind of aortic dissection breach closure device
  • A kind of aortic dissection breach closure device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as figure 1 As shown, the present invention is an aortic dissection tear sealing device, which includes a bare stent body 1, a side branch outer sheath 2, and a occluding side branch 3 compressed in the side branch outer sheath 2; It includes a spring coil 4 and a spring coil micro-fleece 5; one end of the spring coil 4 is anchored to the outer surface of the bare stent body 1 by a connecting ring 8; the spring coil micro-fleece 5 is attached to the spring coil 4; the outer surface of the bare stent 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 body 1 are each provided with four main body positioning points 10; the outer end of the side branch sheath 2 is connected with a traction guide wire 11 .

[0023] Among them, the bare stent body 1 can be made by laser engraving technology or weaving technology; the side branch sheath 2 can be a ...

Embodiment 2

[0026] Such as figure 2 As shown, the present invention is an aortic dissection tear sealing device, which includes a bare stent body 1, a side branch outer sheath 2, and a occluding side branch 3 compressed in the side branch outer sheath 2; It includes a steel wire 6 and a sponge-like plug 7; one end of the steel wire 6 is anchored to the outer surface of the bare stent body 1 by a connecting ring 8; the sponge-like plug 7 is attached to the steel wire 6.

[0027] Among them, the bare stent body 1 can be made by laser engraving technology or weaving technology; the side branch sheath 2 adopts a slender round tubular structure, and the spongy block 7 is short and thick in natural state, and the diameter is larger than the side branch sheath With the diameter of 2, the sponge-like plug 7 is compressed in the side branch sheath 2 in the compressed state; the sponge-like plug 7 can be made of medical high-resilient materials, such as high-density polyvinyl alcohol sponge.

[0028] ...

Embodiment 3

[0030] An aortic dissection gap sealing device, and the rest is the same as in Example 2. The patient’s aortic dissection gap is located at the distal end of the left subclavian artery 5mm, the gap diameter is 3mm, and the proximal tumor neck diameter is 35mm.

[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 diameter of the bare stent body should exceed the diameter of the proximal tumor neck by 10%-20%, so the bare stent body 1 with a diameter of 40mm is selected. ; In order to make the diameter of the cavernous plug 7 after release larger than the diameter of the aortic dissection, a 6mm cavernous plug 7 in the natural state is selected; in order to enable the collateral sheath 2 to pass through the aortic dissection smoothly , Choose the side branch sheath 2 with a diameter of 2.5mm; because the blocking side branch 3 is connected to the outer surface of the bare stent body 1 through...

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Abstract

The invention relates to the technical field of medical devices, and the invention provides an aortic dissection breach closure device, comprising a bare stent main body (1), a side branch outer sheath (2) and a side branch outer sheath (2) compressed into the side branch outer sheath (2). Blocking side branch (3); described blocking side branch (3) also includes spring coil (4) and spring coil microvilli (5) or described blocking side branch (3) also includes steel wire (6) and spongy plugs (7). The occluded side branch of the present invention is fixed at the crack of the interlayer and effectively seals the crack, prevents blood flow from entering the false lumen, and induces thrombus in the false lumen to organize and absorb.

Description

Technical field [0001] The invention relates to the technical field of medical devices, and is particularly applied to a device for blocking aortic dissection cracks. Background technique [0002] Aortic dissection (aortic dissection) means that the blood in the aortic lumen enters the aortic media from the aortic intima cleft, separates the media, and expands along the long axis of the aorta to form a true and false two-lumen aorta A pathological change. The main hazard is that the direct rupture of the false lumen or the rupture after the formation of an aneurysm causes massive hemorrhage and death, and during the formation of the dissection, the formation of the dissection can easily interrupt the blood supply of important branches of the aorta, causing severe ischemia and even serious organs. 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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
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