Embolectomy devices and methods for treatment of acute ischemic stroke condition
First Claim
1. An acute stroke treatment device comprising a flexible delivery wire and a fiber-based clot engagement element that comprises a self-actuation structure, a bundle of unwoven fibers, and a first attachment element extending around the circumference of the flexible delivery wire wherein each fiber of the bundle is secured at one end to the first attachment element,wherein the bundle of fibers have a first low profile delivery configuration and a second extended, deployed configuration with a portion of the fibers flare outward relative to the flexible delivery wire,wherein the self-actuation structure is connected to the bundle of unwoven fibers,wherein the first attachment element either comprises a slide that can translate over the delivery wire or an anchor that is secured at a fixed position around the circumference of the delivery wire, andwherein the other end of the fibers are unsecured or are secured in a bundle at a second attachment element.
0 Assignments
0 Petitions
Accused Products
Abstract
Clot engagement element comprising bundle of unwoven fibers can be assembled to form an acute stroke treatment device. The device has the capability of forming a three dimensional filtration matrix comprising effective pores with a distribution of sizes. The bundle of fiber design allows the device to be effectively delivered into circuitous cerebral arteries to remove clot that causes stroke. The fiber bundle based filtration matrix offers the advantages of conforming to the changing inner perimeter of a blood vessel during a clot removal process and thus the capability to effectively retain and remove a clot in the vessel. The filtration matrix offers the additional advantage to trap any break-off of the clot during the removal process. A plurality of fiber bundles can be combined to form an effective clot engagement element. Supplemental engagement structure as well as mechanical treatment structure can be integrated into the stroke treatment device. The deployment of the fiber based elements can be facilitated by actuation tool. Aspiration can be employed during the clot removal process.
158 Citations
19 Claims
-
1. An acute stroke treatment device comprising a flexible delivery wire and a fiber-based clot engagement element that comprises a self-actuation structure, a bundle of unwoven fibers, and a first attachment element extending around the circumference of the flexible delivery wire wherein each fiber of the bundle is secured at one end to the first attachment element,
wherein the bundle of fibers have a first low profile delivery configuration and a second extended, deployed configuration with a portion of the fibers flare outward relative to the flexible delivery wire, wherein the self-actuation structure is connected to the bundle of unwoven fibers, wherein the first attachment element either comprises a slide that can translate over the delivery wire or an anchor that is secured at a fixed position around the circumference of the delivery wire, and wherein the other end of the fibers are unsecured or are secured in a bundle at a second attachment element.
-
11. An acute stroke treatment device comprising a flexible delivery wire and a fiber-based clot engagement element that comprises a self-actuation structure, a bundle of unwoven fibers, and a first attachment element extending around the circumference of the flexible delivery wire wherein each fiber of the bundle is secured at one end to the first attachment element,
wherein the bundle of fibers have a first low profile delivery configuration and a second extended, deployed configuration with a portion of the fibers flaring outward relative to the flexible delivery wire, wherein the first attachment element either comprises a slide that can translate over the delivery wire or an anchor that is secured at a fixed position around the circumference of the delivery wire, and wherein the other end of the fibers are unsecured or are secured in a bundle at a second attachment element, and wherein the fibers in the second configuration form a three dimensional filtration matrix comprising effective pores with a distribution of sizes within the matrix while the fibers remain unwoven.
Specification