Rotational thrombectomy device
A rotatable thrombectomy wire for breaking up thrombus or other obstructive material comprising an inner core composed of a flexible material and an outer wire surrounding at least a portion of the inner core. The outer wire has a sinuous shaped portion at a distal region. The inner core limits the compressibility of the outer wire. The outer wire is operatively connectable at a proximal end to a motor for rotating the wire to macerate thrombus.
1. A rotational thrombectomy wire comprising:
an inner core composed of a flexible material,
an at least one outer wire wound over at least a portion of the inner core forming a coil;
an exterior surface of the coil extending proximally of a distalmost end of the coil;
the coil having a sinuous shaped portion;
the inner core having a sinuous shaped portion within the sinuous shaped portion of the coil;
a polymeric material positioned over the exterior surface of a first portion of the coil to block interstices of the at least one outer wire,
a portion of a separate distal tip component positioned over the exterior surface of a second portion of the coil;
a flexible polymeric tip positioned over the distal tip component and extending distally therefrom;
the distal tip component extending distally of the distalmost end of the coil;
the distal tip component extending proximally of a proximalmost end of the flexible polymeric tip; and
the thrombectomy wire is operatively connectable to a motor for rotation by the motor.
2. The rotatable thrombectomy wire of claim 1 , wherein the distal tip component includes a recess.
3. The rotatable thrombectomy wire of claim 2 , wherein a portion of the inner core is within the recess.
4. The rotatable thrombectomy wire of claim 2 , wherein a portion of the coil is within the recess.
5. The rotatable thrombectomy wire of claim 4 , wherein the coil is welded to the distal tip component.
6. The rotatable thrombectomy wire of claim 1 , wherein the at least one outer wire comprises a bifilar wire formed by first and second wires wound together side by side so a diameter of the first wire fills a space between adjacent turns of the second wire.
7. The rotatable thrombectomy wire of claim 1 , wherein the distal tip component is composed of stainless steel.
8. The rotatable thrombectomy wire of claim 1 , wherein the flexible polymeric tip is injection molded over the distal tip component.
9. The rotatable thrombectomy wire of claim 1 , wherein the distal tip component contains a dumbbell shaped region.
10. The rotatable thrombectomy wire of claim 9 , wherein the flexible polymeric tip is positioned over the dumbbell shaped region.
11. The rotatable thrombectomy wire of claim 10 , wherein the flexible polymeric tip is injection molded over the dumbbell shaped region.
12. The rotatable thrombectomy wire of claim 1 , wherein the inner core includes multiple wires twisted together.
13. The rotatable thrombectomy wire of claim 1 , wherein the polymeric material is applied as a coating.
14. The rotatable thrombectomy wire of claim 1 , wherein the polymeric material is applied as a shrink wrap material.
15. The rotatable thrombectomy wire of claim 1 , wherein the inner core is composed of nylon material.