Distal protective device
First Claim
1. A distal protection device comprising a catheter having a longitudinal axis, an actuating member, a first strut having a first length and a first buckling force and movable from a collapsed configuration to an expanded configuration upon movement of the actuatina member and a second strut having a second length greater than the first length and a second buckling force greater than the first buckling force, the second strut axially spaced from the first strut and movable from a collapsed configuration to an expanded configuration upon movement of the actuating member, wherein movement of the actuating member initially deploys the first strut and subsequently deploys the second strut, the first strut having a first dimension and the second strut having a second dimension larger than the first dimension, the first and second struts being separately deployable, wherein movement of the first strut deploys filtering material to a first position having a first deployed dimension and movement of the second strut deploys filtering material to a second deployed dimension larger than the first deployed dimension, wherein in the deployed position the first and second struts each form a loop, the loops being axially spaced from one another and positioned so a long axis passes through the opening in both loops and are substantially transverse to the longitudinal axis of the catheter and substantially transverse to a direction of blood flow, and the opening in both loops lies in a plane substantially transverse to the longitudinal axis and is adapted to be in line with a direction of blood flow.
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Accused Products
Abstract
A distal protection device comprising a catheter having a first strut movable from a collapsed configuration to an expanded configuration having a first dimension and a second strut movable from a collapsed configuration to an expanded configuration having a second dimension larger than the first dimension. Movement of the first strut deploys filter material to a first position having a first deployed dimension and movement of the second strut to a first position deploys filter material to a second deployed dimension larger than the first expanded dimension.
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Citations
20 Claims
- 1. A distal protection device comprising a catheter having a longitudinal axis, an actuating member, a first strut having a first length and a first buckling force and movable from a collapsed configuration to an expanded configuration upon movement of the actuatina member and a second strut having a second length greater than the first length and a second buckling force greater than the first buckling force, the second strut axially spaced from the first strut and movable from a collapsed configuration to an expanded configuration upon movement of the actuating member, wherein movement of the actuating member initially deploys the first strut and subsequently deploys the second strut, the first strut having a first dimension and the second strut having a second dimension larger than the first dimension, the first and second struts being separately deployable, wherein movement of the first strut deploys filtering material to a first position having a first deployed dimension and movement of the second strut deploys filtering material to a second deployed dimension larger than the first deployed dimension, wherein in the deployed position the first and second struts each form a loop, the loops being axially spaced from one another and positioned so a long axis passes through the opening in both loops and are substantially transverse to the longitudinal axis of the catheter and substantially transverse to a direction of blood flow, and the opening in both loops lies in a plane substantially transverse to the longitudinal axis and is adapted to be in line with a direction of blood flow.
- 11. A distal protection device comprising a tube having a longitudinal axis, a plurality of cutouts forming at least one distal elongated strut and at least one proximal elongated strut, the at least one distal elongated strut having a first length and a first buckling force and the at least one proximal elongated strut having a second length different than the first length and a second buckling force different than the first buckling force, the struts movable from a retracted to an expanded position, filter material overlying at least a portion of the struts, and an actuating member operatively connected to a portion of the tube wherein movement of the actuating member moves the portion of the tube to thereby move the at least one distal elongated strut and the at least one proximal elongated strut to the expanded position, the elongated strut with a shorter length and a lower buckling force expanding prior to the other elongated strut expanding, and wherein in the expanded position each of the struts forms a loop having an opening, wherein initial movement of the actuating member moves one of the struts toward the expanded position and further movement of the actuating member moves the other strut toward the expanded position.
Specification