The present invention provides for implant device delivery apparatuses and related methods of use. The delivery systems of the present invention incorporate a stretch resistant tube that advantageously makes the implant device, such as an embolic coil, stretch resistant while a delivery system is being used to position the implant device at a desired target site.

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.

An embolic coil implant having a stretch resistant fiber therethrough and dual-functional engagement feature at its proximal end is provided. The stretch resistant fiber can be effective to limiting separation of windings of the embolic coil. The engagement feature can provide an attachment for securing the embolic coil to an engagement system of a delivery tube and for securing the stretch resistant fiber at the proximal end of the embolic coil.

In various aspects, the invention relates to an embolic device for treating aneurysms or other vascular disorders that exhibits improved filling and/or neck blockage over conventional devices. As one example, the embolic device can include a structure that is wound into a spiral shape. In some cases, the spirally wound embolic device includes alternating narrow portions and link portions. As another example, the embolic device can be formed from a structure wound to form an infinity shape or, in some cases, multiple infinity shapes. In instances with multiple infinity shapes, the infinity shapes can be arranged either parallel or perpendicular to each other. In certain aspects, the embolic device can include two different embolic devices that are attached by an interconnect element, such that the two devices are attached but have independent freedom of motion when placed within a vascular disorder.

An indwelling device for embolization comprises a coil portion (11) having a proximal side and a distal side and having a lumen extending in a longitudinal direction, a stretch-resistant member (20) disposed in the lumen, wherein the indwelling device has a fixing structure in which the stretch-resistant member (20) is knotted to the detachable portion attached in the lumen of a proximal end part of the coil portion (11) and extending proximally from a proximal end of the lumen, in order for the stretch-resistant member (20) to be more securely anchored to the coil portion (11).

An embolic coil implant having a stretch resistant fiber therethrough and dual-functional engagement feature at its proximal end is provided. The stretch resistant fiber can be effective to limiting separation of windings of the embolic coil. The engagement feature can provide an attachment for securing the embolic coil to an engagement system of a delivery tube and for securing the stretch resistant fiber at the proximal end of the embolic coil.

An implant can be placed into an aneurysm sac that includes a bioabsorbable coiled fiber having a coiled shape similar to a metallic embolic coil. The implant can have an absorption rate long enough so that the aneurysm can become sufficiently occluded and sufficiently healed as the implant is absorbed. The implant can include crossing microfibers to initiate thrombosis within the aneurysm and/or a stretch-resistant member extending through a lumen of the coiled shape to inhibit elongation of the coiled shape. The crossing microfibers can be attached to the coiled fiber by friction fit between coil windings, heat bonding to the coiled fiber, and/or securement to the stretch-resistant member. The coiled fiber, crossing microfibers, and stretch-resistant member can have rates of absorption that differ to promote an accelerated sequence of occlusion and healing of the aneurysm.

Occlusive implants are provided with various embodiments of active and/or passive release structures. Systems for delivering the occlusive implants as well as methods for making and delivering the implants are also provided.

In some examples, an embolization device includes multiple sections with three-dimensional non-helical structures when deployed at a vascular site. The multiple sections include a first section and one or more second sections that are smaller than the first section. The first section may have a deployed structure configured to anchor the device at a vascular site (e.g., a blood vessel) of a patient while each of the one or more second sections may be formed from loops that configured to pack and obstruct the vascular site. In some cases, the embolization device also includes a third section having a deployed configuration with multiple helical windings or loops is configured to anchor the embolization device at the vascular site.

A delivery member is provided for delivering and deploying an intravascular medical device. The delivery member includes a flexible distal portion including a wound wire coil surrounded by a flexible sleeve and inhibited from extending lengthwise by a support tube positioned through the lumen of the coil. The delivery member can include hypotubes positioned on either side (distally and proximally) from the wound wire coil to which the stretch resistant member and the wound wire coil can be attached. The distal hypotube can include attachment slots for positioning and attaching a loop wire to the distal hypotube. The distal hypotube can further include one or more tube windows for visualization of proper placement of the support tube within a lumen of the distal hypotube.