Apparatus and methods for aspirating emboli
First Claim
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1. Apparatus for filtering and aspirating emboli from a vessel comprising:
- a guidewire;
a vascular filter mounted on the guidewire, the vascular filter including a blood-permeable element, the vascular filter causing emboli to become deposited in the vessel in the vicinity of the vascular filter; and
a first catheter having proximal and distal ends, proximal and distal openings, and a lumen defined by a catheter wall extending between the proximal and distal openings, the distal end of the first catheter has a rounded end with the distal opening off-center such that, when viewed in a cross-section that extends along a central longitudinal axis of the lumen, the catheter wall extends in a generally straight fashion towards the proximal end from the distal opening on a first side and, on a second side opposite the first side, has a first portion nearest the distal opening that is curved in a concave fashion towards the lumen and a second portion extending proximally from the first portion in a generally straight fashion towards the proximal end;
wherein the guidewire passes through the distal opening, is at least partially disposed within the lumen, and passes through a port disposed in the catheter wall proximal of the distal end and distal of the proximal end;
wherein the first catheter is adapted to be advanced along the guidewire to a location in the vessel in the vicinity of the vascular filter to aspirate emboli;
wherein the concave curve of the first portion at least partially defines the distal opening.
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Abstract
Apparatus and methods for aspirating emboli from a vascular filter or stent within a patient'"'"'s circulatory system are provided. A filter sac of the vascular filter permits blood flow and captures emboli from the flow. The aspiration device removes emboli from within or proximal to the vascular filter or stent to reduce the risk to the ischemia during retrieval of the vascular filter and during a treatment procedure. Retrieval of the vascular filter may be accomplished using either the aspiration catheter or a separate retrieval catheter.
231 Citations
14 Claims
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1. Apparatus for filtering and aspirating emboli from a vessel comprising:
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a guidewire; a vascular filter mounted on the guidewire, the vascular filter including a blood-permeable element, the vascular filter causing emboli to become deposited in the vessel in the vicinity of the vascular filter; and a first catheter having proximal and distal ends, proximal and distal openings, and a lumen defined by a catheter wall extending between the proximal and distal openings, the distal end of the first catheter has a rounded end with the distal opening off-center such that, when viewed in a cross-section that extends along a central longitudinal axis of the lumen, the catheter wall extends in a generally straight fashion towards the proximal end from the distal opening on a first side and, on a second side opposite the first side, has a first portion nearest the distal opening that is curved in a concave fashion towards the lumen and a second portion extending proximally from the first portion in a generally straight fashion towards the proximal end; wherein the guidewire passes through the distal opening, is at least partially disposed within the lumen, and passes through a port disposed in the catheter wall proximal of the distal end and distal of the proximal end; wherein the first catheter is adapted to be advanced along the guidewire to a location in the vessel in the vicinity of the vascular filter to aspirate emboli; wherein the concave curve of the first portion at least partially defines the distal opening. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. Apparatus for filtering and aspirating emboli from a vessel comprising:
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a guidewire; a vascular filter mounted on the guidewire, the vascular filter including a blood-permeable element, the vascular filter causing emboli to become deposited in the vessel in the vicinity of the vascular filter; and a first catheter having proximal and distal ends, proximal and distal openings, and a lumen defined by a catheter wall extending between the proximal and distal openings, the distal end of the first catheter has a rounded end with the distal opening off-center such that, when viewed in a cross-section that extends along a central longitudinal axis of the lumen, the catheter wall extends in a generally straight fashion towards the proximal end from the distal opening on a first side and, on a second side opposite the first side, has a first portion nearest the distal opening that is curved in a concave fashion towards the lumen and a second portion extending proximally from the first portion in a generally straight fashion towards the proximal end; wherein the guidewire passes through the distal opening, is at least partially disposed within the lumen, and passes through a port disposed in the catheter wall proximal of the distal end and distal of the proximal end; wherein the first catheter is adapted to be advanced along the guidewire to a location in the vessel in the vicinity of the vascular filter to aspirate emboli; wherein the concave curve of the first portion at least partially defines the distal opening; wherein the distal opening of the first catheter is adapted to accommodate at least a portion of the vascular filter within the lumen of the first catheter. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification