Vascular obstruction removal system and method
First Claim
1. A method for removing an obstruction from a wall of a first blood vessel through which blood normally flows in a given direction, at a location downstream of a branch point where a second blood vessel branches off from the first blood vessel, said method comprising:
- blocking blood flow at a point upstream of the branch point to cause blood to flow through the first blood vessel and past the obstruction in a direction opposite to the given direction and then into the second blood vessel; and
removing material from the obstruction, trapping the removed material, and withdrawing the removed material from the blood vessel.
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Accused Products
Abstract
A method and apparatus for removing an obstruction from a wall of a vessel through which blood normally flows in a given direction, at a location downstream of a branch point where a second blood vessel branches off from the first blood vessel, by: blocking blood flow in the first blood vessel at a point upstream of the branch point to cause blood to flow through the first blood vessel past the obstruction opposite to the given direction and then into the second blood vessel; and removing material from the obstruction, trapping the removed material, and withdrawing the removed material from the blood vessel.
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Citations
24 Claims
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1. A method for removing an obstruction from a wall of a first blood vessel through which blood normally flows in a given direction, at a location downstream of a branch point where a second blood vessel branches off from the first blood vessel, said method comprising:
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blocking blood flow at a point upstream of the branch point to cause blood to flow through the first blood vessel and past the obstruction in a direction opposite to the given direction and then into the second blood vessel; and
removing material from the obstruction, trapping the removed material, and withdrawing the removed material from the blood vessel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. Apparatus for diverting blood flow from one hemisphere of a brain to the other, comprising:
- means for obstructing blood flow in a common carotid artery associated with the one hemisphere and shunting the resultant retrograde flow to the opposite hemisphere of the brain; and
means for filtering the blood flow that goes to the opposite hemisphere by a filter in an external carotid artery associated with the one hemisphere.
- means for obstructing blood flow in a common carotid artery associated with the one hemisphere and shunting the resultant retrograde flow to the opposite hemisphere of the brain; and
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24. A kit for carrying out a procedure for removing an obstruction from a wall of a first blood vessel through which blood normally flows in a given direction, at a location downstream of a branch point where a second blood vessel branches off from the first blood vessel, said kit comprising:
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a guide catheter insertable into the first blood vessel to a point upstream of the branch point;
a blocking device carried by said guide catheter and expandable to block blood flow around said guide catheter in the first blood vessel;
a filter assembly insertable through said guide catheter for trapping material removed from the obstruction;
a guide wire insertable through the guide catheter into the first blood vessel to a location downstream of the branch point;
a predilatation catheter assembly insertable through the guide catheter into the second blood vessel to perform a predilatation procedure on the obstruction; and
an obstruction removal assembly insertable into the second blood vessel over the guide wire to the location of the obstruction.
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Specification