Occlusion device and method of use
A device for protecting cerebral vessels or brain tissue during treatment of a carotid vessel includes a catheter having a distal portion, a proximal portion and a lumen extending therebetween, the catheter including first and second expandable areas provided over the length of the catheter. The device includes a first elongate member insertable longitudinally through the lumen of the catheter, the first elongate member being configured for stretching at least a portion of the catheter and causing one of the first and second expandable areas to transition from an expanded state to a collapsed state. The device further includes a second elongate member insertable longitudinally through the lumen of the catheter, the second elongate member being configured for stretching at least a portion of the catheter and causing the other of the first and second expandable areas to transition from an expanded state to a collapsed state.
1. A device comprising:
a catheter having a distal portion, a proximal portion and at least one lumen extending therebetween, the catheter including first and second self-expandable occlusive members disposed over first and second longitudinally expandable portions of the catheter, respectively; and
a first elongate member insertable through a lumen of the catheter so as to cause expansion of the first longitudinally expandable portion of the catheter and transitioning of the first self-expandable occlusive member from a radially expanded state to a radially collapsed state; and
a second elongate member insertable through the lumen of the catheter so as to cause expansion of the second longitudinally expandable portion of the catheter and transitioning of the second self-expandable occlusive member from a radially expanded state to a radially collapsed state.
2. A device according to claim 1 wherein the first elongate member is retractable proximally relative to the catheter to cause the first self-expandable occlusive member to transition from the radially collapsed state to the radially expanded state.
3. A device according to claim 1 wherein the second elongate member is retractable proximally relative to the catheter to cause the second self-expandable occlusive member to transition from the radially collapsed state to the radially expanded state.
4. A device according to claim 1 wherein the first and second elongate members each comprise a stylet.
5. A device according to claim 1 wherein the first elongate member comprises an outer pusher tube and the first self-expandable occlusive member comprises a proximal self-expandable occlusive member, and wherein the second elongate member comprises an inner pusher tube and the second expandable occlusive member comprises a distal expandable occlusive member.
6. A method for treating a vessel that is bifurcated into two branches, said method comprising the steps of:
providing a catheter having first and second self-expandable occlusive members;
inserting a first elongate member so as to cause the first self-expandable occlusive member to be in a radially collapsed state;
inserting a second elongate member so as to cause the second self-expandable occlusive member to be in a radially collapsed state;
inserting the catheter into the vessel such that the first self-expandable occlusive member is distal to a bifurcation of the vessel in one of the branches and the second self-expandable occlusive member is proximal to the bifurcation;
retracting the first elongate member to allow the first self-expandable occlusive member to expand; and
retracting the second elongate member to allow the second self-expandable occlusive member to expand.
7. A device comprising:
a catheter having a distal portion, a proximal portion and at least one lumen extending therebetween, the catheter including first and second self-expandable occlusive baskets disposed over first and second longitudinally expandable portions of the catheter, respectively; and
a first stylet insertable through a lumen of the catheter so as to cause expansion of the first longitudinally expandable portion of the catheter and transitioning of the first self-expandable occlusive basket from a radially expanded state to a radially collapsed state; and
a second stylet insertable through the lumen of the catheter so as to cause expansion of the second longitudinally expandable portion of the catheter and transitioning of the second self-expandable occlusive basket from a radially expanded state to a radially collapsed state.
8. A device according to claim 7 wherein the first stylet is retractable proximally relative to the catheter to cause the first self-expandable occlusive basket to transition from the radially collapsed state to the radially expanded state.
9. A device according to claim 7 wherein the second stylet is retractable proximally relative to the catheter to cause the second self-expandable occlusive basket to transition from the radially collapsed state to the radially expanded state.
10. A device according to claim 7 wherein the first stylet comprises a first tube and the first self-expandable occlusive basket comprises a proximal self-expandable occlusive basket, and wherein the second stylet comprises a second tube disposed within the first tube, insertable from the proximal end of the first tube, and the second expandable occlusive basket comprises a distal expandable occlusive basket.
11. A device comprising:
a catheter having a distal portion, a proximal portion and at least one lumen extending therebetween, the catheter including first and second self-expandable occlusive meshes disposed over first and second longitudinally expandable portions of the catheter, respectively; and
a first stylet insertable through a lumen of the catheter so as to cause expansion of the first longitudinally expandable portion of the catheter and transitioning of the first self-expandable occlusive mesh from a radially expanded state to a radially collapsed state; and
a second stylet insertable through the lumen of the catheter so as to cause expansion of the second longitudinally expandable portion of the catheter and transitioning of the second self-expandable occlusive mesh from a radially expanded state to a radially collapsed state.
12. A device according to claim 11 wherein the first stylet is retractable proximally relative to the catheter to cause the first self-expandable occlusive mesh to transition from the radially collapsed state to the radially expanded state.
13. A device according to claim 11 wherein the second stylet is retractable proximally relative to the catheter to cause the second self-expandable occlusive mesh to transition from the radially collapsed state to the radially expanded state.
14. A device according to claim 11 wherein the first stylet comprises a first tube and the first self-expandable occlusive mesh comprises a proximal self-expandable occlusive mesh, and wherein the second stylet comprises a second tube disposed within the first tube, insertable from the proximal end of the first tube, and the second expandable occlusive mesh comprises a distal expandable occlusive mesh.