Ischemic stroke device
First Claim
1. A method of removing of at least a portion of an obstruction from an obstructed blood vessel for treatment of ischemic stroke, comprising the steps of:
- providing a telescoping support member including an outer tubular shaft and an inner elongate member extending through said outer tubular shaft and slidable within said outer tubular shaft, said outer tubular shaft having a distal end, and said inner elongate member having a distal end and a proximal end;
providing a first expandable member having a proximal end and a distal end and a tubular body extending between the proximal and distal ends of the first expandable member, said proximal end of said first expandable member being attached to said distal end of said outer tubular shaft of said telescoping support member, and said distal end of said first expandable member being attached to a distal portion of said inner elongate member, said first expandable member having a radially compressed configuration and a radially expanded configuration, and said first expandable member having a longitudinally extended configuration with said proximal and distal ends of said first expandable member disposed at opposing ends of said first expandable member, and an everted configuration with said distal end of said first expandable member withdrawn within said tubular body of said first expandable member adjacent to said proximal end of said first expandable member; and
providing a second expandable member configured to be deployed into an obstruction within the blood vessel, and a tubular mesh body extending between the proximal and distal ends of the second expandable member, said proximal end of said second expandable member being permanently joined to said distal end of said inner elongate member of said telescoping support member,radially expanding said tubular mesh body into contact with at least a portion of the obstruction such that a portion of the obstruction is dislodged to enhance blood flow through the blood vessel, said tubular mesh body including a plurality of interstices, at least a portion of the interstices being adapted to allow passage of at least one dislodged portion of the obstruction therethrough in a radial direction into the tubular mesh body,moving said inner elongate member in a proximal direction relative to said outer tubular shaft of the telescoping support member such that the first expandable member moves between said longitudinally extended configuration and said everted configuration such that said first expandable member envelopes said second expandable member and said second expandable member is disposed radially within said first expandable member.
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Accused Products
Abstract
An ischemic stroke device includes a telescoping member, a first or proximal expandable member connected to the telescoping support member, and a second or distal expandable member connected to the first expandable member. A proximal portion of the first expandable member is attached to a distal end of an outer shaft of the telescoping support member, and a distal end of the first expandable member is attached to a distal portion of an inner core wire of the telescoping support member. The proximal end of the second expandable member is permanently joined to the distal end of the inner core wire. The first expandable member everts to cover the second expandable member that is used to capture an obstruction or clot, prior to pulling the obstruction or clot into a catheter for removal from a patient'"'"'s vasculature.
34 Citations
20 Claims
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1. A method of removing of at least a portion of an obstruction from an obstructed blood vessel for treatment of ischemic stroke, comprising the steps of:
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providing a telescoping support member including an outer tubular shaft and an inner elongate member extending through said outer tubular shaft and slidable within said outer tubular shaft, said outer tubular shaft having a distal end, and said inner elongate member having a distal end and a proximal end; providing a first expandable member having a proximal end and a distal end and a tubular body extending between the proximal and distal ends of the first expandable member, said proximal end of said first expandable member being attached to said distal end of said outer tubular shaft of said telescoping support member, and said distal end of said first expandable member being attached to a distal portion of said inner elongate member, said first expandable member having a radially compressed configuration and a radially expanded configuration, and said first expandable member having a longitudinally extended configuration with said proximal and distal ends of said first expandable member disposed at opposing ends of said first expandable member, and an everted configuration with said distal end of said first expandable member withdrawn within said tubular body of said first expandable member adjacent to said proximal end of said first expandable member; and providing a second expandable member configured to be deployed into an obstruction within the blood vessel, and a tubular mesh body extending between the proximal and distal ends of the second expandable member, said proximal end of said second expandable member being permanently joined to said distal end of said inner elongate member of said telescoping support member, radially expanding said tubular mesh body into contact with at least a portion of the obstruction such that a portion of the obstruction is dislodged to enhance blood flow through the blood vessel, said tubular mesh body including a plurality of interstices, at least a portion of the interstices being adapted to allow passage of at least one dislodged portion of the obstruction therethrough in a radial direction into the tubular mesh body, moving said inner elongate member in a proximal direction relative to said outer tubular shaft of the telescoping support member such that the first expandable member moves between said longitudinally extended configuration and said everted configuration such that said first expandable member envelopes said second expandable member and said second expandable member is disposed radially within said first expandable member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification