Reciprocating rotary arthroscopic surgical instrument
AssigneeSmith & Nephew, Inc.
InventorsPeter M. Cesarini, Karen Drucker, Rafal Jezierski, Roger R. Cassidy, Jr.
Life of this patent
Estimating the term…
Abstract
A surgical instrument includes a cutting member with an implement for cutting tissue, and a drive coupled to the cutting member to simultaneously rotate and translate the cutting member in response to a force applied to the drive. A method of cutting tissue includes positioning an outer member such that tissue is located within the outer member, engaging the tissue with an inner member, and simultaneously rotating and translating the inner member to cut the tissue. A tangential cutting force is applied to the tissue with the inner member to mechanically cut the tissue. The inner member is mechanically driven to undergo simultaneous rotation and translation.
Claims30
A surgical instrument, comprising:
- a cutting member having a cutting edge configured to shear tissue;
- an outer tubular member, the cutting member being received within the outer tubular member, the outer tubular member including a cutting window disposed proximate to a tip of the outer tubular member, the cutting window having a proximal end and distal end;
- a drive coupled to the cutting member, the drive including a drive member having a helical groove such that (i) the drive is configured to rotate, linearly advance, and reciprocate the cutting member in response to a rotational force applied to the drive in a single direction and (ii) advance the cutting edge beyond the distal end of the cutting window.
A surgical instrument, comprising:
- a cutting member having a generally cylindrical end portion with a cutting edge configured to shear tissue, the cutting edge extending around the circumference of the generally cylindrical end portion, the generally cylindrical end portion including a hollow region at least partially defined by the cutting edge for receiving sheared tissue;
- an outer tubular member, the cutting member being at least partially received within the outer tubular member, the outer tubular member including a cutting window disposed proximate to a tip of the outer tubular member, the cutting window having a proximal end and distal end;
- a drive coupled to the cutting member, the drive including a drive member having a helical groove, the drive being configured to rotate, linearly advance, and reciprocate the cutting member in response to a rotational force applied to the drive in a single direction, the cutting member linearly advancing the cutting edge from a point before the proximal end of the cutting window to a point beyond the distal end of the cutting window and also rotating the cutting edge so as to shear tissue located within the cutting window.
A surgical instrument, comprising:
- a cutting member having a generally cylindrical end portion with a cutting edge configured to shear tissue, the cutting edge extending around the circumference of the generally cylindrical end portion, the generally cylindrical end portion including a hollow region at least partially defined by the cutting edge, the hollow region for receiving sheared tissue;
- an outer tubular member, the cutting member being at least partially received within the outer tubular member, the outer tubular member including a cutting window disposed proximate to a tip of the outer tubular member, the cutting window having a proximal end and distal end;
- a drive coupled to the cutting member, the drive including a translation piece and a drive member, the drive member having a helical groove including two helical channels, the translation piece being configured to swivel when moving from a first one of the two helical channels to a second one of the two helical channels, the helical groove making at least two revolutions around the drive member, the translation piece having two legs that form an arch and being disposed in the helical groove, the drive being configured to rotate, linearly advance, and reciprocate the cutting member in response to a rotational force applied to the drive in a single direction, the cutting member linearly advancing the cutting edge from a point before the proximal end of the cutting window to a point beyond the distal end of the cutting window and also rotating the cutting edge so as to shear tissue located within the cutting window.
Dependencies are inferred from the claim text.