Intravascular blood filters and methods of use
First Claim
Patent Images
1. An intravascular blood filter system, comprising:
- an expandable proximal filter adapted to be collapsed within a proximal sheath;
a distal articulatable sheath disposed distal to the proximal sheath, the distal articulatable sheath comprising a first proximal articulatable section, a second distal articulatable section, and a lumen extending through the first proximal articulatable section and the second distal articulatable section, the first proximal articulatable section configured to curve in a first direction and the second distal articulatable section configured to curve in a second direction that is different than the first direction, wherein the first proximal articulatable section comprises a slotted tube and the second distal articulatable section comprises a braided tube;
a pull wire having a length with a proximal end and a distal section coupled to the distal articulatable sheath, the pull wire crossing from a side of the lumen within the first proximal articulatable section to an opposite side of the lumen within the second distal articulatable section, wherein retraction of the pull wire causes the first proximal articulatable section to curve in the first direction and the second distal articulatable section to curve in the second direction; and
an expandable distal filter adapted to be collapsed within the distal articulatable sheath, wherein the distal articulatable sheath is adapted to be independently articulated relative to the proximal sheath and the proximal filter, wherein the first proximal articulatable section and the second distal articulatable section are separate constructions with different types of articulable structures.
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Abstract
Multi-filter endolumenal methods and systems for filtering fluids within the body. In some embodiments a multi-filter blood filtering system captures and removes particulates dislodge or generated during a surgical procedure and circulating in a patient'"'"'s vasculature. In some embodiments a dual filter system protects the cerebral vasculature during a cardiac valve repair or replacement procedure.
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Citations
48 Claims
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1. An intravascular blood filter system, comprising:
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an expandable proximal filter adapted to be collapsed within a proximal sheath; a distal articulatable sheath disposed distal to the proximal sheath, the distal articulatable sheath comprising a first proximal articulatable section, a second distal articulatable section, and a lumen extending through the first proximal articulatable section and the second distal articulatable section, the first proximal articulatable section configured to curve in a first direction and the second distal articulatable section configured to curve in a second direction that is different than the first direction, wherein the first proximal articulatable section comprises a slotted tube and the second distal articulatable section comprises a braided tube; a pull wire having a length with a proximal end and a distal section coupled to the distal articulatable sheath, the pull wire crossing from a side of the lumen within the first proximal articulatable section to an opposite side of the lumen within the second distal articulatable section, wherein retraction of the pull wire causes the first proximal articulatable section to curve in the first direction and the second distal articulatable section to curve in the second direction; and an expandable distal filter adapted to be collapsed within the distal articulatable sheath, wherein the distal articulatable sheath is adapted to be independently articulated relative to the proximal sheath and the proximal filter, wherein the first proximal articulatable section and the second distal articulatable section are separate constructions with different types of articulable structures. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 40, 41, 42)
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16. An intravascular blood filter system, comprising:
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a proximal sheath; a proximal shaft extending through proximal sheath, an expandable proximal filter carried by the proximal shaft collapsed within the proximal sheath; a distal shaft extending through the proximal shaft and the expandable proximal filter; a distal articulatable sheath carried by the distal shaft and positioned distal to a distal end of the proximal sheath and the expandable proximal filter; a guiding member extending through the distal articulatable sheath; an expandable distal filter carried by the guiding member and collapsed within the distal articulatable sheath and distal to the distal end of the proximal sheath, wherein the proximal sheath and the proximal filter allow relative axial translation to allow the proximal filter to expand from a collapsed configuration within the proximal sheath to an expanded configuration outside of the proximal sheath as the proximal sheath is withdrawn with respect to the proximal filter, and wherein the guiding member and the distal sheath allow for relative axial translation to allow the expandable distal filter to expand from a collapsed configuration within the distal articulatable sheath to an expanded configuration outside of the distal articulatable sheath as the guiding member and the expandable distal filter is advanced with respect to the distal sheath; wherein the distal articulatable sheath comprises a first proximal articulatable section, a second distal articulatable section, and a lumen extending through the first proximal articulatable section and the second distal articulatable section, the first proximal articulatable section comprising an articulable hypotube with a plurality of slots formed therein and the second distal articulatable section not including a hypotube with a plurality of slots formed therein and a pull wire having a length with a proximal end and a distal section coupled to the distal articulatable sheath, the pull wire crossing from a side of the lumen within the first proximal articulatable section to an opposite side of the lumen within the second distal articulatable section, wherein retraction of the pull wire causes the first proximal articulatable section and the second distal articulatable section to curve, wherein the first proximal articulatable section comprises a slotted tube and the second distal articulatable section comprises a braided tube. - View Dependent Claims (17, 18)
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19. An intravascular blood filter system comprising:
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a handle; a proximal shaft secured to the handle; a proximal sheath secured to the handle and axially movable with respect to the proximal shaft;
a proximal filter secured to the proximal shaft, wherein the proximal sheath is axially movable with respect to the proximal filter;a distal shaft secured to the handle; a distal articulatable sheath secured to the distal shaft and axially movable with respect to the proximal sheath, the distal articulatable sheath comprising a first proximal articulatable section, a second distal articulatable section, and a lumen extending through the first proximal articulatable section and the second distal articulatable section, the first proximal articulatable section configured to curve in a first direction and the second distal articulatable section configured to curve in a second direction that is different than the first direction, wherein the first proximal articulatable section comprises a first type of articulable structure and the second distal articulatable section comprises a separate type of articulable structure that is different from the first type of articulable structure, wherein the first proximal articulatable section comprises a slotted tube and the second distal articulatable section comprises a braided tube; a distal filter shaft; a distal filter secured to the distal filter shaft and axially movable with respect to the proximal sheath and the distal articulatable sheath; and a single actuation member extending between the handle and the distal articulatable sheath wherein actuation of the single actuation member causes the first proximal articulatable section to curve in the first direction and the second distal articulatable section to curve in the second direction, the single actuation member crossing from a side of the lumen within the first proximal articulatable section to an opposite side of the lumen within the second distal articulatable section. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 43, 44, 45)
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39. An intravascular blood filter system comprising:
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a handle comprising a first handle section and a second handle section;
a proximal shaft secured to the first handle section;a proximal sheath secured to the first handle section and axially movable with respect to the proximal shaft; an expandable proximal filter secured to the proximal shaft and collapsible within the proximal sheath and wherein the proximal sheath is axially movable with respect to the proximal filter; a distal shaft secured to the second handle section; a distal articulatable sheath secured to the distal shaft and axially movable with respect to the proximal sheath wherein the distal articulatable sheath comprises a first proximal articulatable section, a second distal articulatable section, and a lumen extending through the first proximal articulatable section and the second distal articulatable section, wherein the first proximal articulatable section comprises a first type of articulable structure where bending is limited and the second distal articulatable section comprises a separate type of articulable structure where the bending is not limited, wherein the first proximal articulatable section comprises a slotted tube and the second distal articulatable section comprises a braided tube; a pull wire having a length with a proximal end and a distal section wherein the pull wire proximal end is secured to the second handle section and the pull wire distal section is secured to the distal articulatable sheath, the pull wire crossing from a side of the lumen within the first proximal articulatable section to an opposite side of the lumen within the second distal articulatable section, wherein retraction of the pull wire causes the first proximal articulatable section to curve in a first direction and the second distal articulatable section to curve in a second different direction; a distal filter shaft; and an expandable distal filter secured to the distal filter shaft and collapsible within the distal shaft and distal articulatable sheath and wherein the distal filter is axially movable with respect to the proximal sheath, the distal shaft and the distal articulatable sheath. - View Dependent Claims (46, 47, 48)
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Specification