Shape memory metal emboli trap
First Claim
1. An embolus trap device having a proximal end and a distal end comprising:
- an outer catheter having an interior lumen;
an inner catheter disposed within the interior lumen of the outer catheter;
a plurality of basket fixture points spaced along a length of the inner catheter;
a plurality of filter baskets disposed at the basket fixture points of the inner catheter, the filter baskets comprising a plurality of struts and a mesh disposed about the plurality of struts, the mesh having a plurality of openings formed therethrough, the filter baskets having a closeable mouth portion having an inner diameter, the filter baskets being placed at the basket fixture points in order of increasing size of the inner diameter of the mouth portions from the proximal end to the distal end of the embolus trap device;
and a plurality of collapse wires, each of the collapse wires being fixedly attached at a distal end of the collapse wire to a distal end of one of the filter baskets.
3 Assignments
0 Petitions
Accused Products
Abstract
An embolus trap device is provided. The embolus trap device consists of an outer catheter, an inner catheter, a plurality of filter baskets, and a plurality of basket collapse wires. The filter baskets are of different radius and are positioned along the inner catheter in order of increasing radius from the proximal to the distal end. The filter baskets increase in radius so that any embolic fragment that flows past each basket has a chance to be caught and secured by a filter basket distal to it. The filter baskets are separately collapsible by the plurality of collapse wires and are collapsed in proximal-to-distal fashion with the largest basket being closed last in order to capture embolic fragments that may emerge from the smaller baskets because of disruptions as they are closed.
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Citations
17 Claims
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1. An embolus trap device having a proximal end and a distal end comprising:
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an outer catheter having an interior lumen; an inner catheter disposed within the interior lumen of the outer catheter; a plurality of basket fixture points spaced along a length of the inner catheter; a plurality of filter baskets disposed at the basket fixture points of the inner catheter, the filter baskets comprising a plurality of struts and a mesh disposed about the plurality of struts, the mesh having a plurality of openings formed therethrough, the filter baskets having a closeable mouth portion having an inner diameter, the filter baskets being placed at the basket fixture points in order of increasing size of the inner diameter of the mouth portions from the proximal end to the distal end of the embolus trap device; and a plurality of collapse wires, each of the collapse wires being fixedly attached at a distal end of the collapse wire to a distal end of one of the filter baskets. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of collecting embolic debris comprising:
providing an embolus trap device having a proximal and a distal end comprising; an outer catheter having an interior lumen; an inner catheter disposed within the interior lumen of the outer catheter; a plurality of basket fixture points along length of the inner catheter; a plurality of filter baskets disposed at the basket fixture points of the inner catheter, the filter baskets comprising a plurality of struts and a mesh disposed about the plurality of struts, the mesh having a plurality of openings formed therethrough, the filter baskets having a closeable mouth portion having an inner diameter, the filter baskets being placed at the basket fixture points in order of increasing size of the inner diameter of the mouth portions from the proximal to the distal end of the embolus trap device; and a plurality of collapse wires, one of the plurality of collapse wires being attached to each of the filter baskets and having a distal end fixedly attached to the filter basket at a distal base portion of the filter basket; deploying the embolus trap device percutaneously into a vessel or cavity of a patient'"'"'s body; moving the inner catheter through the embolic mass; opening the plurality of filter baskets to deploy the device in its expanded state; filling the filter baskets with debris as the embolus disintegrates; closing the filter baskets by the collapse wires to return the device to its collapsed state; and retracting the embolus trap device from the patient'"'"'s body. - View Dependent Claims (16)
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17. An embolus trap device having a proximal and a distal end comprising:
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an outer catheter having an interior lumen; an inner catheter disposed within the interior lumen of the outer catheter and having a breakage cone at its distal end; a plurality of basket fixture points along length of the inner catheter; a plurality of filter baskets having an exterior surface, a closed state and an expanded state, and comprising a body portion made of woven NITINOL and a closeable mouth portion having an inner diameter comprising a NITINOL ring, the filter baskets being placed at the basket fixture points in order of increasing size of the inner diameter of the mouth portions from the proximal to the distal end of the embolic protection device; and a plurality of collapse wires disposed about the exterior surfaces of the filter baskets in both the closed state and the expanded state, the collapse wires being configured to constrict the filter baskets when pulled toward the proximal end of the embolic protection device.
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Specification