56 results about "Aneurysm neck" patented technology

This is a device for bridging the neck of either an aneurysm in the vasculature and stabilizing the presence of vaso-occlusive devices (such as helically wound coils) in that aneurysm. The closure patch may be delivered either from the exterior of the distal end of a catheter or delivered from the catheter lumen. It is preferably implanted by the severance of an included electrolytically severable joint. The retainer assembly itself typically has a number of radially projecting elements which are, in turn, attached to a scrim-like fabric, preferably collagen-coated Dacron, extending among the various radially projecting elements. The closure patch is intended to be resident within the aneurysm after it is deployed. After deployment, the aneurysm may be at least partially filled with vaso-occlusive devices such as helically wound coils.

In one embodiment, a neck bridge for bridging the neck of an aneurysm includes a junction region, a number of radially extending array elements attached to the junction region, and a cover attached to one or both of the junction region and an array element. The array elements are configured to be positioned within the aneurysm after the neck bridge is deployed from a delivery device. In a second embodiment, the neck bridge includes a junction region and a braided or mesh-like structure secured to the junction region. The braided or mesh-like structure is made from an elastic material.

An aneurysm neck cover is disclosed for use in occluding the flow of blood within an aneurysm. The aneurysm neck cover includes a first and second expandable sealing member having a circular joining member and reinforcing spokes which give the sealing members a slightly cupped configuration. The expandable sealing members are connected with a support element. When the aneurysm neck cover is deployed within the aneurysm, the first sealing member expands within the aneurysm while the second sealing member expands within an adjacent blood vessel thereby forming a seal around the mouth of the aneurysm and preventing the flow of blood within the aneurysm.

A device useful for treating an aneurysm having a neck comprises a first inflatable disc and a second inflatable disc, said second inflatable disc being adjacent to said first inflatable disc and in fluid communication therewith. The inflatable discs are sized and constructed such that when the inflatable discs are inflated, the aneurysm neck is engaged therebetween. The inflatable discs may include at least one wall that is substantially inelastic and may include an internal member limiting expansion of the inflatable disc in a direction parallel to the device axis. The inflatable discs may have an aspect ratio greater than 3.

An implant for treating brain aneurysms, especially terminal aneurysms, comprises a neck cover and elongate shaft removably secured to an embolic delivery catheter. As such, the shaft aids in directing and placing the cover at the aneurysm neck, protecting the delivery catheter from adhesion with the embolic material, and securing the cover in place with connection or adhesion of the shaft to the embolic material delivered through the catheter. The implant can be anchored at the aneurysm either by interface and/or adhesion of the shaft or shaft and cover with the resident embolic materials.

An implantable medical device for at least partially closing a portion of a vascular aneurysm is disclosed. The treatment device includes a neck bridge having a delivery configuration and a deployed configuration. The device also includes an actuation mechanism configured to be temporarily engaged to the neck bridge to convert the neck bridge between the delivery configuration and the deployed configuration.

Disclosed herein are medical devices comprising a single-lobed, thin-walled, expandable body and a flexible, elongated delivery device for treating saccular vascular aneurysms and occluding segments of blood vessels and other biological conduits. The expandable bodies may include gold and other metals that can be compressed, positioned in the lumen of an aneurysm, or other biological conduit and expanded. The external surface of the expandable bodies can be configured to promote local thrombosis and to promote the growth of tissue into and around the surface in order to reduce migration of the expandable body and to occlude and seal the aneurysm or biological conduit. For the treatment of saccular aneurysms, the expandable body may be deployed in combination with one or more coiled wires that contact both the wall of the aneurysm and the expandable body and exert force on the expandable body to aid in sealing the aneurysm neck.

A method of creating a surface model of an intracranial aneurysm in an artery having a lumen, the aneurysm having a neck and a dome and the virtual reconstruction of the parent artery across the lateral extension of the aneurysm neck. The method includes the steps of: determining a center and radius of the artery over the lateral extension of the aneurysm; determining the boundary points that mark the boundary between the aneurysm neck and the artery; determining the angle of the aneurysm neck with respect to the artery, for various cross sections of the neck; determining the length of the neck; determining the height of the dome; estimating the area of the neck; and creating the surface model of the intracranial aneurysm in the artery, using the results from the previous steps.

The present disclosure provides an endovascular device for treating a defect in the vascular wall such as aneurysm by deploying a self expandable barrier around the aneurysm neck to block the blood flow to the aneurysm and method for implementing the endovascular device. The endovascular device also allows for delivery of certain swellable materials and bioactive materials, such as thrombogenic compounds, to the aneurysm to accelerate occlusion and healing of the aneurysm.

The invention discloses a cerebral aneurysm endovascular plastic repair bracket and a conveying device thereof, and solves a technical problem of treating small blood vessels and particularly cerebral aneurysm in a human body. The repair bracket is a netlike cylinder which is wove by elastic alloy wires with diameter of 30-50mum followed by heat treatment to form an elasticated net taking a cylinder shape in a free state, two end portions of the netlike cylinder is sparsely wove and a middle portion is closely wove to form a compact section. In the conveying device, a microcatheter is internally provided with a bracket folded in a straight line shape, a guide wire passes through the bracket, two ends of the bracket is connected with the guide wire by a pushing ring, and the bracket is the netlike cylinder. Compared with the prior art, the bracket composed of short diameter and soft alloy wires benefits isolating cerebral arteries bearing an aneurysm from a cerebral aneurysm neck, reducing thrombosis caused by impact of blood in the arteries bearing the aneurysm on the cerebral aneurysm body and separating the cerebral aneurysm body from the arteries bearing the aneurysm, thus the bracket is applicable to treatment of fusiform cerebral aneurysm.

The invention relates to an intracranial aneurysm interventional closure treatment device. The intracranial aneurysm interventional closure treatment device includes a closure device, a delivery device, and a closure device fixing frame; the closure device fixing frame is circular tube-shaped, and the wall of the circular tube is of a multi-hole net structure; the closure device includes a closure device outside-aneurysm part, a closure device fixing part, and a connection part connecting the closure device outside-aneurysm part and the closure device fixing part; the closure device outside-aneurysm part is a disc-shaped closure piece and tightly attaches to the inner wall of a support or the inner wall of a blood vessel; the closure device fixing part is a circular table-shaped closure piece which tightly attaches to the closure device fixing frame; and a far end of the closure device outside-aneurysm part contracts inward and is connected to the closure device fixing part. During closure, the connection part of the closure device is embedded into net holes of the closure device fixing frame, the closure device fixing part is positioned outside the wall of the closure device fixing frame, and the closure device outside-aneurysm part is positioned inside the wall of the closure device fixing frame. The closure treatment device can achieve complete cover of an aneurysm neck, induce thrombosis in the aneurysm, and achieve complete embolism of the aneurysm.

The invention relates to a stent with a local dense net in the blood vessel, which belongs to the technical field of medical devices implantable into the human body. The invention mainly comprises an expandable compression stent and is characterized in that the expandable compression stent is provided with a dense net type stent area that can block or slow up blood passage after expansion, and the dense net type stent area can be divided into a 1-type local dense net self-expandable stent and 2-type local dense net balloon expandable stent. The invention has the positive effects of good embolism effect, simple structure, convenient operation, time saving, safety, compatibility with both the thick and the thin blood vessels, and wide application scope; the stent overcomes the shortage in the prior art; after the stent implantation and the occlusion of the aneurysm neck, the local dense net can block or slow up blood flow into the aneurysm cavity, and then thrombus is formed in the aneurysm cavity, thereby thoroughly embolizing aneurysm without using other embolism materials; non-dense parts do not affect the blood transportation of branch vessels beside the aneurysm neck; the stent greatly reduces operation cost, and alleviates patients' wound and pain at the same time.

The invention discloses a cerebral aneurysm intracavity blood vessel rebuilding device which comprises a bare metal stent and a tectorial membrane. The bare metal stent comprises a near supporting end, a far supporting end and a middle part, the near supporting end and the far supporting end are located at the two ends of the bare metal stent and used for supporting a aneurysm-carried cerebral artery blood vessel wall, the length of the middle part is slightly larger than the width of a cerebral aneurysm neck, and the middle part is arranged between the two supporting ends. The radial size of the middle part is smaller than that of the two supporting ends, and a blood supply cavity is formed between the middle part and the aneurysm-carried cerebral artery blood vessel wall. The tectorial membrane covers the near supporting end and part of the middle part so as to isolate the cerebral aneurysm from receiving the forward blood flowing, large in vector, of an aneurysm-carried cerebral artery and allow the far supporting end without the tectorial membrane to provide backward blood flow, small in vector, from the far end of the aneurysm-carried cerebral artery. The cerebral aneurysm intracavity blood vessel rebuilding device solves the problems that according to very large and huge cerebral aneurysm stent-assisted coil embolization, the aneurysmal obliteration rate is low and the recurrence rate is high, side branch and perforating branch blood supply is ensured, the cerebral aneurysm rupture is effectively prevented, and the space occupying effect of the cerebral aneurysm is reduced.

The invention relates to an intracranial aneurysm neck reconstruction device. The intracranial aneurysm neck reconstruction device comprises a reconstruction device body, a guide wire and an outer sheath tube, wherein the reconstruction device body gradually and outwards expands from the near end to the far end; the far end of the reconstruction device body is provided with a head end developing block; the middle end of the reconstruction device body is provided with a middle end developing block; the near end of the reconstruction device body is folded downwards and is fixedly arranged on the guide wire; the guide wire is positioned in the outer sheath tube; a disconnecting point is arranged at the connected position of the guide wire and the reconstruction device body; the other end of the guide wire is connected with a disconnector. The intracranial aneurysm neck reconstruction device disclosed by the invention has the advantages that by implanting the reconstruction device body, the flowing speed of blood in an intracranial aneurysm is slowed down, the hemodynamics in the intracranial aneurysm is changed, and thus the impact from local blood flowing to an aneurismal wall can be reduced; meanwhile, through the implantation of a parent artery reconstruction device body, a local parent artery can be strengthened and repaired, and the physiological structure of a normal part of the parent artery is enabled to recover.

The invention relates to a medical apparatus, in particular to a nanometer electrospinning fiber stent for intravascular interventional therapy of intracranial aneurysm. The fiber stent comprises a stent body and a pushing device, wherein the stent body is of a cylindrical net-shaped structure which is formed by weaving a nickel-titanium alloy wire, and the two ends of the stent body are respectively provided with four X-ray-opaque marking points, so as to ensure the accurate release of the stent; the surface of the middle section of the stent body is attached with a large amount of nanometer electrospinning fibers, and the starting point and the finish point of the middle section attached with the nanometer electrospinning fibers are respectively provided with two X-ray-opaque marking points, so as to assist the development positioning in the stent release process, and ensure that the middle section can completely cover an aneurysm neck in the stent releasing process. The fiber stent has the advantages that the dynamics of blood in the intracranial aneurysm can be changed, the formation and organization of thrombus in the aneurysm, and the regeneration of skin cells in blood vessels of the aneurysm neck are promoted, and the purpose of reconstructing an aneurysm-carrying artery is realized; meanwhile, the smoothness of the aneurysm-carrying artery and branch arteries is maintained.