Vascular filter system
First Claim
Patent Images
1. A removable percutaneous vascular filter system for blocking emboli in a vessel while allowing continued perfusion of blood comprising:
- a guidewire having distal and proximal ends, a filter comprising (a) a non-metallic, porous, filter membrane having a distal portion and a proximal free end portion, wherein the pore size of the porous filter membrane is in the range of from about 20 to about 300 microns, and (b) a filter membrane support structure extending from the flexible filter membrane distal portion to 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 and wherein the filter membrane proximal free end portion is substantially parallel to the guidewire in its collapsed state; and
deploying means operatively connected to the filter to cause the filter membrane proximal free end portion to move from a position substantially parallel to the guidewire to a position removed from the longitudinal axis of the guidewire to cause the flexible filter member to form a substantially conical shape, and to form a generally sealing relationship with the wall of said vessel.
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Accused Products
Abstract
A removable vascular filter system for capture and retrieval of emboli while allowing continuous perfusion of blood, comprising a porous filter membrane and a filter membrane support structure. This system is useful for any percutaneous angioplasty, stenting, thrombolysis or tissue ablation procedure. The system may minimize the incidence of stroke, myocardial infarction or other clinical complications that may be associated with these procedures.
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Citations
20 Claims
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1. A removable percutaneous vascular filter system for blocking emboli in a vessel while allowing continued perfusion of blood comprising:
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a guidewire having distal and proximal ends, a filter comprising (a) a non-metallic, porous, filter membrane having a distal portion and a proximal free end portion, wherein the pore size of the porous filter membrane is in the range of from about 20 to about 300 microns, and (b) a filter membrane support structure extending from the flexible filter membrane distal portion to 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 and wherein the filter membrane proximal free end portion is substantially parallel to the guidewire in its collapsed state; and
deploying means operatively connected to the filter to cause the filter membrane proximal free end portion to move from a position substantially parallel to the guidewire to a position removed from the longitudinal axis of the guidewire to cause the flexible filter member to form a substantially conical shape, and to form a generally sealing relationship with the wall of said vessel. - View Dependent Claims (2, 3, 5)
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4. The removable percutaneous vascular filter system of claim 4, further comprising a stent coaxially disposed around said inflatable balloon.
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6. A percutaneous vascular filter system comprising:
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a guidewire having proximal and distal ends;
a filter arranged around said guidewire, said filter (a) a non-metallic, porous, filter membrane having a distal portion and a proximal free end portion, wherein the pore size of the porous filter membrane is in the range of from about 20 to about 300 microns, and (b) a filter membrane support structure extending from the flexible filter membrane distal portion to the flexible filter membrane proximal portion, wherein the flexible membrane distal portion is pivotally attached to the guidewire adjacent its distal end and the proximal end of the filter is attached to the guidewire; and
a sheath arranged around said guidewire and having proximal and distal ends, the distal end of the sheath having a lumen of sufficient diameter to slide over the proximal portion of the filter. - View Dependent Claims (7, 8, 9, 10)
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11. A removable percutaneous vascular filter system for blocking emboli in a vessel while allowing continued perfusion of blood, comprising:
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a guidewire having distal and proximal ends;
a filter comprising (a) a non-metallic, porous, filter membrane having a proximal portion and a distal free end portion, wherein the pore size of the porous filter membrane is in the range of from about 20 to about 300 microns, and (b) a filter membrane support structure extending from the flexible filter membrane distal portion to the flexible filter membrane proximal portion, wherein said filter membrane support structure is pivotally attached to the guidewire near said distal end of the guidewire and wherein the filter membrane distal free end portion is substantially parallel to the guidewire in its collapsed state; and
deploying means operatively connected to the filter to cause the filter membrane proximal free end portion to move from a position substantially parallel to the guidewire to a position removed from the longitudinal axis of the guidewire to cause the flexible filter member to form a substantially conical shape, and to form a generally sealing relationship with the wall of said vessel. - View Dependent Claims (13, 15, 16)
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12. A removable percutaneous vascular filter system for blocking emboli in a vessel while allowing continued perfusion of blood, comprising:
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a guidewire having distal and proximal ends;
a filter comprising (a) a non-metallic, porous, filter membrane having a proximal portion and a distal free end portion, wherein the pore size of the porous filter membrane is in the range of from about 20 to about 300 microns, and (b) a filter membrane support structure extending from the flexible filter membrane distal portion to the flexible filter membrane proximal portion, wherein said filter membrane support structure is pivotally attached to the guidewire near said distal end of the guidewire and wherein the filter membrane distal free end portion is substantially parallel to the guidewire in its collapsed state; and
a sheath concentrically arranged around said guidewire and having proximal and distal ends, the distal end of the sheath having a lumen of sufficient diameter to slide over the proximal portion of the filter.
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- 14. An improved device for use with a catheter for ablation within the body, wherein the catheter has a proximal end and distal end, and an outer surface, said distal end having ablative capability, the improvement comprising a distally facing, porous, filter membrane and filter membrane support structure arranged on the outer surface of the catheter proximal to its distal end.
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17. An improved device for use with a infusion catheter for causing medication to be delivered to a thrombus, the improvement comprising:
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a vascular filter positioned distal to said infusion catheter;
said vascular filter comprising a guidewire having distal and proximal ends, with said infusion catheter coaxially disposed around said guidewire;
said vascular filter further comprising (a) a non-metallic, porous filter membrane having a distal portion and a proximal free end portion, wherein the pore size of the porous filter membrane is in the range of from about 20 to about 300 microns, and (b) a filter membrane support structure extending from the flexible filter membrane distal portion to the flexible filter membrane proximal portion, and deploying means operatively connected to the filter to cause the filter membrane support structure to form a substantially conical shape, and to form a generally sealing relationship with the wall of said vessel.
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18. An improved device for use with a balloon catheter, the improvement comprising:
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a vascular filter positioned distal to said balloon catheter;
said vascular filter comprising a guidewire having distal and proximal ends, with said balloon catheter coaxially disposed around said guidewire;
said vascular filter further comprising (a) a non-metallic, porous filter membrane having a distal portion and a proximal free end portion, wherein the pore size of the porous filter membrane is in the range of from about 20 to about 300 microns, and (b) a filter membrane support structure extending from the flexible filter membrane distal portion to the flexible membrane proximal portion, and deploying means operatively connected to the filter to cause the filter membrane support structure to form a substantially conical shape, and to form a generally sealing relationship with the wall of said vessel.
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19. An improved device for use with a stent delivery system, the improvement comprising:
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a vascular filter positioned distal to said stent delivery system;
said vascular filter comprising a guidewire having distal and proximal ends, with said stent delivery system coaxially disposed around said guidewire;
said vascular filter further comprising (a) a non-metallic, porous filter membrane having a distal portion and a proximal free end portion, wherein the pore size of the porous filter membrane is in the range of from about 20 to about 300 microns, and (b) a filter membrane support structure extending from the flexible filter membrane distal portion to the flexible filter membrane proximal portion, and deploying means operatively connected to the filter to cause the filter membrane support structure to form a substantially conical shape, and to form a generally sealing relationship with the wall of said vessel.
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Specification