Reciprocating rotary arthroscopic surgical instrument

摘要

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.

主权项

1. A surgical instrument, comprising:
a cutting member having a cutting edge and being configured to rotate about a longitudinal axis and linearly advance generally along the longitudinal axis; 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 separated by a first length along the longitudinal axis; a drive coupled to the cutting member, the drive including a drive member having a helical groove, the helical groove having a second length along the longitudinal axis that is longer than the first length 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.