Vaso-occlusive devices including a friction element and methods of use

摘要

Vaso-occlusive apparatuses, including implants, and methods of using them to treat aneurysms. The vaso-occlusive implants described herein 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 as well as a friction element between the soft braided member and the coil. The friction element allows the relatively soft and elongate implant to be pushed out of a cannula without binding up within the cannula.

主权项

1. A vaso-occlusion system for occluding an aneurysm, the system comprising:
a delivery catheter extending from a proximal end to a distal end; and a vaso-occlusive device within the delivery catheter, wherein the vaso-occlusive device is adapted to be pushed out of, and retrieved back into, the distal end of the delivery catheter, the vaso-occlusive device comprising:
an elongate inner member having a length, wherein the length comprises a plurality of elongate regions having a first diameter separated by discrete regions having a second diameter that is greater than the first diameter but less than 1.5 times the first diameter, wherein the discrete regions form friction elements;an outer braided tubular member, wherein the braided tubular member has a length that is less than the length when deployed of the elongate inner member and greater than 5 cm, and has a collapsed configuration when held within the delivery catheter, and expands to a diameter of greater than 1.5 times the first diameter of the inner member at a distal end of the outer braided tubular member when released from the delivery cannula; andwherein the friction elements are positioned along the length of the inner member proximal to the distal end of the outer braided tubular member and distal to the proximal end of the outer braided tubular member, and are configured to press the braided tubular member against the catheter when the inner member is in the collapsed configuration within the delivery catheter so that the braided tubular member moves with the inner member when the vaso-occlusive device is pushed distally out of the delivery catheter.