Tissue resectors with cutting wires, hand operated tissue resecting systems and associated methods
AssigneeBoston Scientific Scimed, Inc.
InventorsShawn P. Fojtik, Annette McClellan, Timothy R. Nieman, Erik S. Liddiard
Life of this patent
Estimating the term…
Abstract
A tissue resector includes an outer cannula with a cutting wire disposed therein. The outer cannula includes an opening that is configured to be associated with a cutting element of the cutting wire in such a way that when tissue is drawn into the opening of the cannula, a cutting element of the cutting wire can be rotated past the opening to engage and cut into and through the tissue. The outer cannula and the cutting wire may also be configured to enable aspiration of the tissue. A tissue resector according to this disclosure may be used with a hand-held, hand-operated rooter.
Claims20
A tissue resector, comprising:
- a cannula including:
- a wall;
- a lumen defined through the wall and extending along a length of the cannula;
- a distal end;
- and
- an opening at or adjacent to the distal end and establishing communication between an exterior of the wall and the lumen;
- a cutting wire within the lumen;
- and
- a cutting feature having an inner surface secured to a distal end of the cutting wire, wherein the cutting feature cooperates with the opening through the cannula;
- wherein the cutting wire is configured to rotate eccentrically within the lumen of the cannula;
- wherein the cutting feature is a cylindrical element having an open proximal end into which the distal end of the cutting wire extends, wherein the cylindrical element has a longitudinally-oriented slot extending from an outer circumferential surface of the cylindrical element into an open interior of the cylindrical element.
A tissue resection system, comprising:
- a tissue resector blade;
- a cutting wire within a lumen of a cannula, the tissue resector blade having an inner surface secured to a distal end of the cutting wire, wherein the tissue resector blade cooperates with an opening through the cannula to resect tissue;
- a hand-powered rooter having a trigger;
- and
- an adapter for translating proximal movement of the trigger of the hand-powered rooter to rotation of the tissue resector blade in a first direction, and for translating distal movement of the trigger of the hand-powered rooter to rotation of the tissue resector blade in a second direction opposite the first direction;
- wherein the cutting wire is configured to rotate eccentrically within the lumen of the cannula;
- wherein the tissue resector blade is a cylindrical element having an open proximal end into which the distal end of the cutting wire extends, wherein the cylindrical element has a longitudinally-oriented slot extending from an outer circumferential surface of the cylindrical element into an open interior of the cylindrical element.
A method for removing tissue from a body of a subject, comprising:
- drawing tissue into an opening of a tissue resector;
- rotating a cutting wire of the tissue resector eccentrically within a lumen of the tissue resector to cut the tissue, wherein a rotational axis of a cutting feature fixed to a distal end of the cutting wire is offset from a central axis of the cutting wire;
- and
- aspirating cut tissue through the lumen of the tissue resector;
- wherein the cutting feature is a cylindrical element having an open proximal end into which the distal end of the cutting wire extends, wherein the cylindrical element has a longitudinally-oriented slot extending from an outer circumferential surface of the cylindrical element into an open interior of the cylindrical element.
Dependencies are inferred from the claim text.