To permit placement of an embolic device embolic device at a desired indwelling position in an aneurysm and readjustment of the indwelling position of the embolic device that is already indwelled, a medical instrument set includes an embolic device insertable into a delivery catheter, and configured to, when the embolic device is indwelled in an aneurysm, absorb a liquid in the aneurysm and expand, and an elongated delivery pusher insertable into the delivery catheter and configured to push the embolic device out of the delivery catheter into the aneurysm. The delivery pusher includes an elongated main body and an aspiration lumen that is formed to penetrate to main body in an axial direction from a distal end to a proximal end of the main body and causes the delivery pusher to aspirate and hold the embolic device.

To displace an amount of curvature of a curved section at the tip of an insertion part that delivers an embolic device into an aneurysm to facilitate insertion/removal operations, an elongated and hollow delivery catheter includes an elongated main body, and a curved section at the distal side of the main body that curves to gradually move away from a center axis of the main body. The curved section has a lumen that continues from the distal end of the curved section toward the base end of the main body and enables delivery of an embolic device into an aneurysm through the lumen. The delivery catheter is usable with an elongated correcting member that is insertable into the delivery catheter lumen and that displaces the curved section so that an amount of curvature of the curved section after insertion is less than that before insertion.

A hydrogel stent for cerebral aneurysm includes a hydrogel polymer, and a stent body wrapping at least a portion of the hydrogel polymer. The stent body is expandable in a cerebral aneurysm of a blood vessel. The stent body is provided in a mesh type surrounding at least a portion of the hydrogel polymers. An embolization device for cerebral aneurysm, includes a hydrogel stent for cerebral aneurysm; a micro-conduit providing a movement path for guiding the hydrogel stent to a cerebral aneurysm of a blood vessel; and a pusher wire connected to the hydrogel stent to be movable in the movement path.

The present invention provides a braided implant with a retractable dual proximal layer and methods for administering the braided implant to treat aneurysms. The implant can include a tubular braid that can be set into a predetermined shape, compressed for delivery through a microcatheter, and implanted in at least one implanted position that is based on the predetermined shape and the geometry of the aneurysm in which the braid is implanted. The implant can also have a retractable dual layer at the proximal end of the device made of the same braid to provide additional coverage at the neck of the aneurysm. The dual layer can be pressed distally into a first implanted portion of the tubular braid, moving the first portion of the tubular braid towards the distal portion of an aneurysm wall so that the implant can partially or completely occlude an aneurysm neck.

A device for occluding a vasculature of a patient including a micrograft having an absorbent polymeric structure with a lumen of transporting blood. The micrograft has a series of peaks and valleys formed by crimping. The occluding device is sufficiently small and flexible to be tracked on a guidewire and/or pushed through a microcatheter to a site within the vasculature of the patient. Delivery systems for delivering the micrografts are also disclosed.

In some aspects, the present disclosure provides a delivery device for delivering a detachable medical implant that comprises an elongated delivery member and a first engagement portion. The first engagement portion comprises a first proximal-facing surface, a first distal-facing surface, and a first lumen that is configured to accommodate an activation wire, wherein at least 50% of a surface area of the first proximal-facing surface is angled away from a proximal end of the first engagement portion. In other aspects, the present disclosure provides a medical delivery system comprising: such a delivery device; an implantable device comprising a medical device portion and a second engagement portion, the second engagement portion comprising a second lumen configured to accommodate an activation wire, a second proximal-facing surface and a second distal-facing surface; and an activation wire. Other aspects pertain to methods of medical device delivery using such a medical delivery system.

An endovascular device includes a catheter and a detachment mechanism that comprises a shape memory material located at a distal end of the catheter. The device further includes a detachable tip component secured by the detachment mechanism, wherein the detachment mechanism is configured such that application of electricity to the detachment mechanism causes the detachment mechanism to open and release the detachable tip component.

Vaso-occlusive apparatuses, including implants, and methods of using them to treat aneurysms. For example, described herein are expandable vaso-occlusive implants that include one or more soft and expandable braided member coupled to a pushable member such as a coil that maybe inserted and retrieved from within an aneurism using a delivery catheter. In particular, the expandable implants described herein are configured to allow relatively soft and elongate implants to be pushed out of a cannula without binding up within the cannula.

A bristle device for delivery into a body lumen comprises a longitudinally extending stem 1 and a plurality of bristles extending generally outwardly from the stem for anchoring the device in a body lumen. There may be at least two bristle segments and in some cases there are flexible sections between the segments. The flexible sections articulate to enable the device to pass through a catheter placed in a tortuous anatomy or to be deployed in a curved vessel, or across a bifurcation. In some cases at least some of the bristle segments are spaced-apart to accommodate bending of the bristles.

A parent artery occlusion (PAO) device which provides for immediate occlusion of a cerebral artery to isolate a defect. The PAO device includes a self-expanding wire-frame prolate structure which is partially covered with an ePTFE membrane.