Aspiration catheter having a variable over-the-wire length and methods of use
First Claim
1. An aspiration catheter comprising:
- an aspiration shaft;
a proximal tube having a first lumen extending therethrough, wherein said proximal tube is slidably disposed over said aspiration shaft; and
a distal tube having a second lumen extending therethrough, wherein said distal tube is slidably disposed over said aspiration shaft distal to said proximal tube, said distal tube is slidably positionable within said first lumen, at least a proximal end of said distal tube is unremovably disposed within said first lumen, and said aspiration shaft is unremovable from said second lumen.
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Accused Products
Abstract
An aspiration catheter includes an aspiration shaft and a telescoping outer sheath which can be passed over a guidewire. The sheath includes “nesting” proximal and distal tubes. The distal tube slides within a proximal tube lumen, and the aspiration shaft slides within a distal tube lumen. The catheter can be placed in an expanded position by pushing the aspiration shaft, thereby causing the distal tube to be moved distally. The catheter can be retracted by pulling the aspiration shaft proximally so that a distal segment of the aspiration shaft is drawn into the distal tube lumen and the distal tube is drawn into the proximal tube lumen. Alternatively, a middle tube is slidingly disposed over the aspiration shaft between the proximal and distal tubes. In this embodiment, the middle tube nests within the proximal tube lumen and the distal tube nests within a middle tube lumen.
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Citations
14 Claims
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1. An aspiration catheter comprising:
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an aspiration shaft;
a proximal tube having a first lumen extending therethrough, wherein said proximal tube is slidably disposed over said aspiration shaft; and
a distal tube having a second lumen extending therethrough, wherein said distal tube is slidably disposed over said aspiration shaft distal to said proximal tube, said distal tube is slidably positionable within said first lumen, at least a proximal end of said distal tube is unremovably disposed within said first lumen, and said aspiration shaft is unremovable from said second lumen. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An aspiration catheter comprising:
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an aspiration shaft;
a proximal tube having a first lumen extending therethrough, wherein said proximal tube is slidably disposed over said aspiration shaft;
a middle tube having a second lumen extending therethrough, wherein said middle tube is slidably disposed over said aspiration shaft distal to said proximal tube, said middle tube is slidably positionable within said first lumen, and at least a proximal end of said middle tube is unremovably disposed within said first lumen; and
a distal tube having a third lumen extending therethrough, wherein said distal tube is slidably disposed over said aspiration shaft distal to said middle tube, said distal tube is slidably positionable within said second lumen, at least a proximal end of said distal tube is unremovably disposed within said second lumen, and said aspiration shaft is unremovable from said third lumen. - View Dependent Claims (8, 9)
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10. A method of aspirating a vessel comprising:
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introducing a guidewire into the vessel;
providing an aspiration catheter having an aspiration shaft slidably connected to a telescoping outer sheath, wherein said telescoping outer sheath is in a fully contracted configuration;
inserting a proximal end of the guidewire into the telescoping outer sheath;
pushing said aspiration shaft distally, thereby causing said telescoping outer sheath to expand;
maneuvering said aspiration catheter along said guidewire to a treatment site; and
aspirating the vessel. - View Dependent Claims (11, 12)
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13. A method of aspirating a vessel comprising:
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providing an aspiration catheter having an aspiration shaft slidably connected to a telescoping outer sheath, wherein said telescoping outer sheath is in a fully contracted configuration;
inserting a distal end of said aspiration catheter into said vessel;
pushing said aspiration shaft distally, thereby causing said telescoping outer sheath to expand;
maneuvering said aspiration catheter through said vessel to a treatment site; and
aspirating the vessel. - View Dependent Claims (14)
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Specification