Vaso-occlusive devices and methods of use
First Claim
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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 diameter;
a soft outer braided tubular member formed of about 24 to 36 strands comprising a Nitinol wire having a thickness that is 0.0010 inches or less in diameter, wherein the braided tubular member is attached and fixed to the inner member at a proximal end of the braided tubular member and extends in a longitudinal axis over the inner member but is not attached to the inner member at a distal end of the braided tubular member, further wherein the braided tubular member has a length that is greater than 5 cm, forms a braid angle between crossing strands in a direction of the longitudinal axis of about 35 degrees or less when held within the delivery catheter, and expands relative to the inner member to a diameter of greater than 1.5 times the diameter of the inner member when released from the delivery catheter.
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Abstract
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.
102 Citations
26 Claims
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1. A vaso-occlusion system for occluding an aneurysm, the system comprising:
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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 diameter; a soft outer braided tubular member formed of about 24 to 36 strands comprising a Nitinol wire having a thickness that is 0.0010 inches or less in diameter, wherein the braided tubular member is attached and fixed to the inner member at a proximal end of the braided tubular member and extends in a longitudinal axis over the inner member but is not attached to the inner member at a distal end of the braided tubular member, further wherein the braided tubular member has a length that is greater than 5 cm, forms a braid angle between crossing strands in a direction of the longitudinal axis of about 35 degrees or less when held within the delivery catheter, and expands relative to the inner member to a diameter of greater than 1.5 times the diameter of the inner member when released from the delivery catheter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A vaso-occlusion device for occluding an aneurysm, wherein the vaso-occlusion device comprises a collapsed configuration that is pushable out of a delivery catheter and an expanded configuration, the vaso-occlusive device further comprising:
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an elongate inner member having a diameter; and a soft outer braided tubular member formed of about 24 to 36 strands comprising a Nitinol wire having a thickness that is 0.0010 inches or less in diameter, wherein the braided tubular member is attached and fixed to the inner member at a proximal end of the braided tubular member and extends in a longitudinal axis over the inner member but is not attached to the inner member at a distal end of the braided tubular member, further wherein the braided tubular member has a length that is greater than 5 cm, forms a braid angle between crossing strands in a direction of the longitudinal axis of about 35 degrees or less in the collapsed configuration within the delivery catheter, and expands relative to the inner member to a diameter of greater than 1.5 times the diameter of the inner member in the expanded configuration when released from the delivery catheter.
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20. A method of occluding an aneurysm in a patient, the method comprising:
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inserting a catheter into the patient, wherein the catheter houses a vaso-occlusive device in a collapsed configuration within a lumen of the catheter, and the vaso-occlusive device comprises an elongate inner member having a diameter and an outer braided tubular member formed of about 24 to 36 strands comprising a Nitinol wire having a thickness that is 0.0010 inches or less in diameter, wherein the braided tubular member is attached and fixed to the inner member at a proximal end of the braided tubular member and extends in a longitudinal axis over the inner member but is not attached at a distal end of the braided tubular member, further wherein the braided tubular member has a length that is greater than 5 cm, and the braided tubular member forms a braid angle between crossing strands in a direction of the longitudinal axis of about 35 degrees or less in the collapsed configuration within the catheter; and pushing the vaso-occlusive device distally out of the catheter so that the braided tubular member expands relative to the inner member to a diameter of greater than 1.5 times the diameter of the inner member in an expanded configuration when released from the delivery cannula. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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Specification