Multiple layered vaso-occlusive coils
First Claim
1. A vaso-occlusive device comprising a primary coil constructed of a plurality of helically wound turns of a biocompatible wire said helical primary coil shaped into a secondary form having a single longitudinal axis with at least a first section having a first section end and a second section end and a second section, said first and second sections constructed of a plurality of helically wound turns of said primary coil and wherein said second section is at least partially surrounded by said first section between said first section end and said second section end.
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Abstract
This is an implantable vaso-occlusive device. It is a complex, helically wound coil having multiple secondary layers of primary windings. The final shape is often chunky in nature and may be used in the approximate shape of an anatomical cavity. It may be deployed in the approximate shape of a sphere, an ovoid, or other distorted spherical shape. The device is a self-forming shape made from a pre-formed linear vaso-occlusion member. Fibers may be introduced onto the device and affixed to the pre-formed linear member. The constituent member may be also be covered with a fibrous braid. The device is typically introduced through a catheter. The device is passed axially through the catheter sheath and assumes its form upon exiting the catheter without further action. The invention also includes methods of winding the anatomically shaped vaso-occlusive device into appropriately shaped forms and annealing them to form various devices.
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Citations
26 Claims
- 1. A vaso-occlusive device comprising a primary coil constructed of a plurality of helically wound turns of a biocompatible wire said helical primary coil shaped into a secondary form having a single longitudinal axis with at least a first section having a first section end and a second section end and a second section, said first and second sections constructed of a plurality of helically wound turns of said primary coil and wherein said second section is at least partially surrounded by said first section between said first section end and said second section end.
- 15. A vaso-occlusive device comprising a primary coil constructed of a plurality of helically wound turns of a biocompatible wire said helical primary coil shaped into a secondary form having more than one axis and with a first section having a first section longitudinal axis, said first section longitudinal axis having first and second ends, and a second section having a second section longitudinal axis different than the first section longitudinal axis, said first and second sections constructed of a plurality of helically wound turns of said primary coil and wherein said second section is at least partially surrounded by said first section between the first and second ends of the first section longitudinal axis.
Specification