DEVICE FOR EXTRACTING AN ELONGATED STRUCTURE IMPLANTED IN BIOLOGICAL TISSUE
First Claim
1. A device for extracting an implanted elongated structure from biological tissue, comprising:
- a sheath having a proximal portion and a distal portion, said distal portion extending to a distal end of said sheath, said sheath having first, second and third lumens defined therein, each of said lumens opening to said sheath distal end, said first and second lumens disposed in a wall surface of said sheath and extending generally adjacent one another along said wall surface, said third lumen being dimensioned to receive the elongated structure therein, said sheath including a bending zone along a length thereof, said sheath wall surface having said first and second lumens disposed therein being alternately compressible and expandable responsive to a bend along said bending zone;
a first wire segment and a second wire segment, each of said segments having a proximal end, said first wire segment positioned in said first lumen such that said first wire segment proximal end is affixed proximal to said bending zone to one of said sheath and said second wire segment, said second wire segment positioned in said second lumen such that said second wire segment proximal end is affixed proximal to said bending zone to one of said sheath and said first wire segment, a remainder of said first wire segment extends distally in said first lumen and a remainder of said second wire segment extends distally in said second lumen, said first wire segment having a length such that said segment extends distally a first distance relative to said wall surface when said bend compresses said wall surface generally adjacent said first and second lumens, and extends distally a second distance relative to said wall surface when said bend expands said wall surface generally adjacent said first and second lumens, said first distance being greater than said second distance, and said distal end of said first wire segment extending distally beyond said sheath distal end at least said first distance.
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Accused Products
Abstract
A device for extracting an implanted elongated structure from biological tissue comprises a sheath having a plurality of lumens therein opening to the sheath distal end. First and second lumens are disposed along a wall of the sheath, and a third lumen is dimensioned to receive the elongated structure. The sheath wall having the first and second lumens disposed therein is alternately compressible and expandable responsive to a bend along a bending zone of the sheath. A first wire segment is positioned in the first lumen, and a second wire segment is positioned in the second lumen, wherein the respective proximal ends of the segments are affixed proximal to the bending zone. The respective wire segments extend distally in the respective first or second lumen a first distance beyond the distal end of the sheath when the bend compresses the wall surface generally adjacent the first and second lumens, and extend distally a second distance, less than the first distance, when the bend expands the wall surface.
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Citations
20 Claims
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1. A device for extracting an implanted elongated structure from biological tissue, comprising:
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a sheath having a proximal portion and a distal portion, said distal portion extending to a distal end of said sheath, said sheath having first, second and third lumens defined therein, each of said lumens opening to said sheath distal end, said first and second lumens disposed in a wall surface of said sheath and extending generally adjacent one another along said wall surface, said third lumen being dimensioned to receive the elongated structure therein, said sheath including a bending zone along a length thereof, said sheath wall surface having said first and second lumens disposed therein being alternately compressible and expandable responsive to a bend along said bending zone; a first wire segment and a second wire segment, each of said segments having a proximal end, said first wire segment positioned in said first lumen such that said first wire segment proximal end is affixed proximal to said bending zone to one of said sheath and said second wire segment, said second wire segment positioned in said second lumen such that said second wire segment proximal end is affixed proximal to said bending zone to one of said sheath and said first wire segment, a remainder of said first wire segment extends distally in said first lumen and a remainder of said second wire segment extends distally in said second lumen, said first wire segment having a length such that said segment extends distally a first distance relative to said wall surface when said bend compresses said wall surface generally adjacent said first and second lumens, and extends distally a second distance relative to said wall surface when said bend expands said wall surface generally adjacent said first and second lumens, said first distance being greater than said second distance, and said distal end of said first wire segment extending distally beyond said sheath distal end at least said first distance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for extracting an implanted elongated structure from biological tissue encapsulating at least a portion of said structure in a vessel, comprising:
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providing a lead extraction device, said lead extraction device comprising;
a sheath having a proximal portion and a distal portion, said distal portion extending to a distal end of said sheath, said sheath having first, second and third lumens defined therein, each of said lumens opening to said sheath distal end, said first and second lumens disposed in a wall surface of said sheath and extending generally adjacent one another along said wall surface, said third lumen being dimensioned to receive the elongated structure therein, said sheath including a bending zone along a length thereof, said sheath wall surface having said first and second lumens disposed therein being alternately compressible and expandable responsive to a bend along said bending zone;
a first wire segment and a second wire segment, each of said segments having a proximal end, said first wire segment positioned in said first lumen such that said first wire segment proximal end is affixed proximal to said bending zone to one of said sheath and said second wire segment, said second wire segment positioned in said second lumen such that said second wire segment proximal end is affixed proximal to said bending zone to one of said sheath and said first wire segment, a remainder of said first wire segment extends distally in said first lumen and a remainder of said second wire segment extends distally in said second lumen, said first and second wire segments each having a length such that said segments extend distally a first distance relative to said wall surface when said bend compresses said wall surface generally adjacent said first and second lumens, and extend distally a second distance relative to said wall surface when said bend expands said wall surface generally adjacent said first and second lumens, said first distance being greater than said second distance, and said distal ends of said first and second wire segments extending distally beyond said sheath distal end at least said first distance;inserting said sheath distal end into said vessel; advancing said sheath along one or more bends in said vessel by rotating the sheath in said one or more bends such that said segments extend said first distance; and cutting said encapsulating tissue by engaging said tissue with said segments when said segments are at said first distance. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification