Intracranial dense net stent

A dense mesh and network management technology, applied in the field of medical devices, can solve the problems of occlusion, inconvenience, thrombosis, etc., and achieve the effect of accurate release positioning and convenient operation.

Inactive Publication Date: 2021-06-18
XINKAINUO MEDICAL TECH SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such steps are relatively cumbersome to operate. During the operation, the microcatheter or the coil may artificially puncture the aneurysm wall, causing the rupture and bleeding of the aneurysm during the operation, resulting in serious complications and other consequences; when the coil is placed in the operation, it may also cause thrombosis, resulting in Unnecessary embolization complications; for small aneurysms, even the smallest coil cannot be inserted into the aneurysm cavity, and forced embolization is more likely to cause aneurysm rupture and bleeding
In addition, since the cerebral artery has many branch vessels, it is easy to cover the branch vessels and cause serious complications such as cerebral infarction.
Although a full-dense mesh stent used abroad can simplify the operation of coil embolization and completely occlude the aneurysm when used in the treatment of aneurysms, the entire dense mesh of the stent has a wide range of influence on blood vessels, which may cause unnecessary branch vessels Hyperplasia, stenosis or even occlusion of the vessel wall
The above stent and the operation method are neither safe nor convenient, so there is an urgent need to develop a simple and easy-to-operate stent for the treatment of cerebral artery giant aneurysms, tiny aneurysms, wide-necked aneurysms and those involving branch vessels. aneurysm, and reduce the impact and irritation of stents on normal blood vessels

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Such as figure 1 As shown, the intracranial dense mesh support of the patent of the present invention includes a network tube support formed by connecting a plurality of unit networks to each other, and is connected to the development point on the network tube support; it is characterized in that: the network tube support is coated with anticoagulant Substance, the network of part of the unit network of the network pipe support is covered with a hydrophilic polymer material; such as figure 2 As shown, the part of the unit network covered with the hydrophilic polymer material runs through the development point mark.

[0020] The network pipe support is made of nickel-titanium alloy material;

[0021] The volume occupancy rate of the hydrophilic polymer material is far greater than that of the network tube support.

[0022] In the release state, the hydrophilic polymer material covers 20% of the network tube stent.

[0023] Such as image 3 As shown, in the released ...

Embodiment 2

[0029] Such as Figure 4 As shown, the intracranial aneurysm fine-mesh stent was crimped into the sheath of the disposable delivery system, and the sheath of the delivery system was placed into the body of the abdominal aortic aneurysm spanning the branch of the renal artery; the intracranial aneurysm was slowly released. Inner dense mesh stent, place the dense mesh stent covered with hydrophilic polymer material at the neck of the aneurysm.

[0030] The dense-mesh stent is a bare metal stent without covering, so it will not block the blood flow into the branch blood vessels during the treatment of the aneurysm, and can ensure the blood supply and normal work of the branch blood vessels. At the same time, the dense mesh stent can change the blood flow direction and flow mode at the aneurysm, reducing the pressure and shear force on the wall of the aneurysm; and the anticoagulant treatment on its surface can avoid the formation of thrombus on the inner wall of the artery; the n...

Embodiment 3

[0032] Such as figure 2 As shown, the hydrophilic macromolecular material covers 5% of the surface area of ​​the network tube stent when it is in the released state; the network tube support part can block the mouth of the aneurysm, and make the blood entering the aneurysm form vortex and thrombus Closing the aneurysm cavity, the distal part not covered by hydrophilic polymer material does not affect the patency of the distal branch vessels.

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Abstract

The invention discloses an intracranial dense mesh stent with an anticoagulant coating. The intracranial dense mesh stent comprises a dense mesh stent body and a hydrophilic polymer material covering the dense mesh stent body, wherein the dense mesh stent body is coated with the anticoagulant coating. According to the intracranial dense net stent, not only can a channel be reconstructed for blood vessels, but also antithrombotic treatment can be carried out on the blood vessel wall at the position of stent implantation, and embolism treatment can be carried out on aneurysm at the same time.

Description

technical field [0001] The invention belongs to the technical field of medical devices, in particular to an intracranial dense mesh bracket. Background technique [0002] Intracranial aneurysm refers to a tumor-like protrusion produced by the limited expansion of the cerebral artery wall. The protruding aneurysm wall gradually becomes thinner under the continuous impact of blood flow and eventually ruptures and bleeds. Cerebral aneurysm rupture and hemorrhage have acute onset, severe symptoms, no obvious aura, and high mortality and disability rates. The treatment of cerebral aneurysms is mainly divided into surgical clipping and endovascular interventional embolization. However, surgical clipping has large trauma, many complications, long operation and recovery time, and is not welcomed by doctors and patients. With the development and progress of minimally invasive endovascular interventional therapy technology, more and more patients with cerebral aneurysm receive endov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/12
CPCA61B17/12031A61B17/12118A61B17/12159A61B17/12168A61B17/12177
Inventor 成立萍赵振心陈南翔
Owner XINKAINUO MEDICAL TECH SHANGHAI CO LTD
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