Patent ID: 8192430
Filing Date: 2012-06-05
Classification: A61B

Abstract:
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 said sheath, 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 said sheath, 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.