Patent ID: 7819887
Filing Date: 2010-10-26
Classification: A61B,A61M

Abstract:
1. A rotatable thrombectomy wire for breaking up thrombus or other obstructive material, the wire having an insertion position and an exposed operative position and comprising: an inner core composed of a first flexible material and having a first outer diameter and a distal end; and a non-sharpened multifilar outer wire composed of a second different material and surrounding at least a portion of the inner core and in contact with an outer surface of the inner core in the insertion position of the wire, the multifilar outer wire having a distal end and including at least first and second metal wires wound side by side such that at least at a distal tip the coils of the first wire occupy the space between adjacent turns of the second wire forming a closed pitch, the closed pitch extending to a distalmost end of the outer wire and being non-tapered, the distal end of the outer wire terminating adjacent the distal end of the inner core, and the first and second wires have a preformed sinuous shaped portion at a distal region such that it has such sinuous shaped portion independent of the inner core, the inner core having a sinuous shaped portion within the sinuous shaped portion of the multifilar outer wire, the inner core limiting the compressibility of the multifilar wire as the multifilar wire contacts the outer surface of the inner core, the multifilar wire operatively connectable at a proximal end to a motor for rotating the wire to macerate thrombus, the inner core and multifilar wire insertable together and rotating together as a unit to macerate thrombus; a polymeric material surrounding the sinuous shaped portion of the first and second wires to block interstices of the multifilar wire, the polymeric material being spaced proximally of the distal end of the inner core and outer wire; a metal tip positioned around a portion of the outer wire; and a blunt polymeric tip independent of the polymeric material and spaced distally of the polymeric material and distally of the distalmost end of the wire, the polymeric tip positioned over an outer portion of the metal tip wherein the outer portion extends in a distal direction.