Embolic protection device
First Claim
1. An over-the-wire embolic protection device, comprising:
- a catheter having a first lumen formed therein;
a self-expanding filtration element affixed about the distal end of said catheter, formed so as to assume a generally conical shape of preselected maximum diameter when not constrained;
a sheath, substantially axially aligned with said catheter, longitudinally shiftable relative to said filtration element and dimensioned to constrain said filtration element to a reduced diameter; and
an inner member disposed within said first lumen of said catheter so as to be longitudinally shiftable therein, said inner member having a lumen formed therein dimensioned to accommodate a guidewire and wherein said inner member is attached to said sheath at its distal end while its proximal end extends towards the proximal end of the device.
1 Assignment
0 Petitions
Accused Products
Abstract
A self-expanding filtration element is fitted to the distal end of a catheter while a sheath for constraining such element to a reduced diameter is mechanically manipulatable from the proximal end of the device. The entire device is maneuvered into position over a guide wire and deployed prior to treatment of the body lumen at an upstream location. After completion of the treatment procedure, the filtration element is collapsed and constrained within the sheath to retain any embolic material that has been captured and allow it to be safely removed from the vasculature. The device may be combined with a primary treatment modality and its low profile allows the constrained filtration element to be removed through a deployed stent.
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Citations
16 Claims
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1. An over-the-wire embolic protection device, comprising:
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a catheter having a first lumen formed therein;
a self-expanding filtration element affixed about the distal end of said catheter, formed so as to assume a generally conical shape of preselected maximum diameter when not constrained;
a sheath, substantially axially aligned with said catheter, longitudinally shiftable relative to said filtration element and dimensioned to constrain said filtration element to a reduced diameter; and
an inner member disposed within said first lumen of said catheter so as to be longitudinally shiftable therein, said inner member having a lumen formed therein dimensioned to accommodate a guidewire and wherein said inner member is attached to said sheath at its distal end while its proximal end extends towards the proximal end of the device. - View Dependent Claims (2, 3)
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4. An over-the-wire embolic protection device, comprising:
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a catheter having a first lumen formed therein;
a self-expanding filtration element affixed about the distal end of said catheter, formed so as to assume a generally conical shape of preselected maximum diameter when not constrained;
a sheath, substantially axially aligned with said catheter, longitudinally shiftable relative to said filtration element and dimensioned to constrain said filtration element to a reduced diameter; and
means for shifting said sheath relative to said filtration element from the proximal end of the device, wherein said catheter is dimensioned to slidably receive a primary treatment modality thereover.
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5. An over-the-wire embolic protection device, comprising:
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a catheter having a first lumen formed therein;
a self-expanding filtration element affixed about the distal end of said catheter, formed so as to assume a generally conical shape of preselected maximum diameter when not constrained;
a sheath, substantially axially aligned with said catheter, longitudinally shiftable relative to said filtration element and dimensioned to constrain said filtration element to a reduced diameter; and
means for shifting said sheath relative to said filtration element from the proximal end of the device, wherein said catheter has a primary treatment modality fitted thereto at a location proximal to said filtration element. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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12. An over-the-wire embolic protection device, comprising:
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a catheter having a first lumen formed therein dimensioned to accommodate a guide wire and a second lumen formed therein;
a self-expanding filtration element affixed about the distal end of said catheter, formed so as to assume a generally conical shape of preselected maximum diameter when not constrained;
a sheath, substantially axially aligned with said catheter, longitudinally shiftable relative to said filtration element and dimensioned to constrain said filtration element to a reduced diameter; and
a pushwire attached to said sheath at its distal end which extends proximally therefrom within said second lumen for shifting said sheath relative to said filtration element from the proximal end of the device. - View Dependent Claims (13)
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14. An over-the-wire embolic protection device, comprising:
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a catheter having a first lumen formed therein;
a self-expanding filtration element affixed about the distal end of said catheter, formed so as to assume a generally conical shape of preselected maximum diameter when not constrained;
a sheath, substantially axially aligned with said catheter, longitudinally shiftable relative to said filtration element and dimensioned to constrain said filtration element to a reduced diameter; and
an outer member that is disposed about said catheter and extends towards its proximal end;
wherein the distal end of said outer member defines said sheath and said filtration element is oriented such that it is attached to said catheter at its distal end and is expanded radially outwardly at its proximal end.- View Dependent Claims (15)
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16. An over-the-wire embolic protection device, comprising:
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a catheter having a first lumen formed therein;
a self-expanding filtration element affixed about the distal end of said catheter, formed so as to assume a generally conical shape of preselected maximum diameter when not constrained;
a sheath, substantially axially aligned with said catheter, longitudinally shiftable relative to said filtration element and dimensioned to constrain said filtration element to a reduced diameter;
a plurality of longitudinally raised guiding ribs are fitted to the exterior surface of said filtration element; and
an outer member that is disposed about said catheter and extends towards its proximal end, wherein the distal end of said outer member defines said sheath and said filtration element is oriented such that it is attached to said catheter at its proximal end and is expanded radially outwardly at its distal end and said catheter is dimensioned to slidably receive a primary treatment modality thereover.
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Specification