Vascular filter
First Claim
1. A removable percutaneous vascular filter device for capturing micro-and macro-emboli while allowing continued perfusion of blood, comprising:
- a guidewire comprising an elongate member having distal and proximal portions, the distal portion including a shapeable, tapered soft distal tip, an outside diameter, and a recess in the distal portion immediately adjacent the distal tip, the recess having distal and proximal ends, and a predetermined depth, the guidewire further comprising a central lumen;
a filter comprising (a) a non-metallic, porous, flexible filter membrane having a distal portion and a proximal free end portion and (b) a filter membrane support structure extending from the flexible filter membrane distal portion to at least the flexible filter membrane proximal portion, wherein said filter membrane distal portion is pivotally attached to the guidewire near said distal end of the guidewire recess and wherein the filter membrane proximal free end portion is positioned in the recess substantially parallel to the guidewire when the filter membrane is in a collapsed state, the predetermined depth of the recess providing a space wherein the filter membrance lies adjacent to an inner portion of the elongate member when the filter membrane is in the collapsed state and has an outside diameter that is less than the outside diameter any portion of of the elongate member except for said recess and the distal portion of said distal tip; and
deploying means operatively connected to the filter to cause filter membrane proximal free end portion to move from a position substantially parallel to the elongate member to a position removed from the longitudinal axis of the elongate member to cause the flexible filter membrane to form a substantially conical shape to form a generally sealing relationship with the wall of said vessel, the deploying means including a moveable core being slidably positioned in the central lumen and extending beyond the flexible filter membrane distal position and into the shapeable, tapered soft distal tip.
1 Assignment
0 Petitions
Accused Products
Abstract
A removable vascular filter device for blocking micro-and macro-emboli while allowing continued perfusion of blood, comprises a guidewire having distal and proximal portions, wherein there is a recess in the distal portion and a filter comprising a flexible filter membrane and a filter membrane support structure. The filter membrane has a fixed inner portion and a free outer portion, wherein the filter membrane fixed inner portion is movably attached toward the distal end of the guidewire recess and wherein the filter membrane free outer portion is positioned in the recess when the filter membrane is in a collapsed state. A deploying means causes the filter membrane proximal end portion to assume a position substantially normal to the longitudinal axis of the guidewire.
-
Citations
20 Claims
-
1. A removable percutaneous vascular filter device for capturing micro-and macro-emboli while allowing continued perfusion of blood, comprising:
-
a guidewire comprising an elongate member having distal and proximal portions, the distal portion including a shapeable, tapered soft distal tip, an outside diameter, and a recess in the distal portion immediately adjacent the distal tip, the recess having distal and proximal ends, and a predetermined depth, the guidewire further comprising a central lumen;
a filter comprising (a) a non-metallic, porous, flexible filter membrane having a distal portion and a proximal free end portion and (b) a filter membrane support structure extending from the flexible filter membrane distal portion to at least the flexible filter membrane proximal portion, wherein said filter membrane distal portion is pivotally attached to the guidewire near said distal end of the guidewire recess and wherein the filter membrane proximal free end portion is positioned in the recess substantially parallel to the guidewire when the filter membrane is in a collapsed state, the predetermined depth of the recess providing a space wherein the filter membrance lies adjacent to an inner portion of the elongate member when the filter membrane is in the collapsed state and has an outside diameter that is less than the outside diameter any portion of of the elongate member except for said recess and the distal portion of said distal tip; and
deploying means operatively connected to the filter to cause filter membrane proximal free end portion to move from a position substantially parallel to the elongate member to a position removed from the longitudinal axis of the elongate member to cause the flexible filter membrane to form a substantially conical shape to form a generally sealing relationship with the wall of said vessel, the deploying means including a moveable core being slidably positioned in the central lumen and extending beyond the flexible filter membrane distal position and into the shapeable, tapered soft distal tip. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A removable percutaneous vascular filter device for capturing micro- and macro-emboli while allowing continued perfusion of blood, comprising:
-
a guidewire comprising an elongate member having distal and proximal portions, the distal portion including a shapeable, tapered soft distal tip, an outside diameter, and a recess in the distal portion immediately adjacent the distal tip, the recess having distal and proximal ends, and a predetermined depth;
a filter comprising a non-metallic, porous, flexible filter membrane and a filter membrane support structure, the filter membrane having a fixed inner portion and a free outer portion, wherein the filter membrane fixed inner portion is attached toward the distal end of the recess and wherein the filter membrane free outer portion is positioned in the recess when the filter membrane is in a collapsed state, the predetermined depth of the recess providing a space, wherein the filter membrane lies adjacent to an inner portion of the elongate member when the filter membrane is in the collapsed state and has an outside diameter that is less than the outside diameter any portion of of the elongate member except for said recess and the distal portion of said distal tip and wherein the filter membrane in an unstressed position assumes a position substantially normal to the longitudinal axis of the elongate member; and
means operatively connected to the filter to collapse the filter membrane from a deployed state to a collapsed state. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification