Surgical tool arrangement and surgical cutting accessory for use therewith
AssigneeStryker Corporation
InventorsJames M. HAYES, Brian FOUTS
Life of this patent
Estimating the term…
Abstract
A surgical tool arrangement for performing endoscopic surgical procedures which includes a powered handpiece and a cutting accessory which detachably connects to the handpiece and incorporates a cutting head configuration which provides both aggressive tissue resection and a smooth-cut finish on treated tissue.
Claims23
A surgical cutting accessory for use with a surgical handpiece, said accessory comprising a generally tubular cutting element defining a longitudinal axis, a hollow interior, a proximal end and a distal end spaced therefrom, said distal end defining therein a cutting window in communication with said hollow interior and having circumferentially spaced-apart first and second cutting edges disposed in opposed relation with one another, said first cutting edge including a tooth and a linear edge portion disposed axially adjacent said tooth, said second cutting edge including a tooth and a linear edge portion disposed axially adjacent said tooth of said second cutting edge, said tooth of said first cutting edge being aligned, in a direction transverse to the axis, with said linear edge portion of said second cutting edge, said tooth of said second cutting edge being aligned, in a direction transverse to the axis, with said linear edge portion of said first cutting edge, and each said linear edge portion, when viewed in cross-section in a direction transverse to the axis, defining an acute included edge angle.
A surgical cutting accessory configured for being attached to and driven by a powered surgical handpiece, said surgical accessory comprising:
- an outer housing assembly including a hub at a proximal end of said outer housing assembly and configured for cooperation with a coupling arrangement provided on a powered surgical handpiece, an elongate and generally tubular housing element having a proximal end connected to said hub and a distal end defining a first cutting window therein, said first cutting window having a pair of spaced-apart first and second cutting edges which are generally straight in configuration;
- and
- a cutting element assembly including a hub at a proximal end of said cutting element assembly and configured for cooperation with a drive member of a powered surgical handpiece, and an elongate drive shaft disposed in said housing element for movement relative thereto, said drive shaft having a proximal end connected to said hub of said cutting element assembly and a distal end including a cutting head defining a longitudinal axis, said cutting head defining a second cutting window therein disposed adjacent said first cutting window of said housing element, said second cutting window having a pair of spaced-apart first and second cutting edges disposed in opposed relation with one another, said first cutting edge including a tooth and a generally straight edge portion disposed axially adjacent said tooth, said second cutting edge including a tooth and a generally straight edge portion disposed axially adjacent said tooth of said second cutting edge, said tooth of said first cutting edge being aligned, in a direction transverse to the axis, with said straight edge portion of said second cutting edge, and said tooth of said second cutting edge being aligned, in a direction transverse to the axis, with said straight edge portion of said first cutting edge, said first and second edge portions each being configured for cutting hard or soft tissue.
A surgical cutting accessory for use with a surgical handpiece, said accessory comprising a tubular cutting head defining a longitudinal axis and a hollow interior, said cutting head defining first and second cutting windows therein in communication with said hollow interior, said cutting windows opening sidewardly of said cutting head in directions transverse to the axis, each of said first and second cutting windows having respective first and second cutting edges disposed in opposed and circumferentially spaced-apart relation with one another, said first cutting edges each including a tooth and a linear edge portion disposed axially adjacent the respective said tooth, said second cutting edges each having a linear edge portion, said tooth of said first cutting edge of said first cutting window being aligned, in a direction transverse to the axis, with said linear edge portion of said second cutting edge of said first cutting window, said tooth of said first cutting edge of said second cutting window being aligned, in a direction transverse to the axis, with said linear edge portion of said second cutting edge of said second cutting window.
A surgical cutting accessory for use with a surgical handpiece, said accessory comprising a generally tubular inner cutting element defining a longitudinal axis, a hollow interior, a proximal end and a distal end spaced therefrom, said distal end defining therein a cutting window in communication with said hollow interior and having a cutting edge, said accessory further including an outer housing element in which said cutting element is disposed for movement relative thereto, said outer housing element having a cutting edge disposed in opposed relation with said cutting edge of said inner cutting element, said cutting edge of said inner cutting element including a tooth and a substantially linear edge portion disposed axially adjacent said tooth, said inner cutting element being disposed for rotating movement within said outer housing element to move said cutting edge of said cutting window of said inner cutting element towards said cutting edge of said cutting window of said outer housing element to cut tissue adjacent said cutting window of said outer housing element, said substantially linear edge portion defining an acute included edge angle.
A surgical cutting accessory for use with a surgical handpiece, said accessory comprising a cutting element defining a longitudinal axis, a hollow interior, a proximal end and a distal end spaced therefrom, said distal end defining a cutting window in communication with said hollow interior and including an annular edge, said annular edge having a first edge part which extends in a generally axial direction and is configured to excise tissue or bone, and a second edge part extending generally transversely to the axis and including an edge face defining a negative internal shear angle which is less than zero degrees.
A surgical cutting accessory for use with a surgical handpiece, said accessory comprising a cutting element defining a longitudinal axis, a hollow interior, a proximal end and a distal end spaced therefrom, said distal end defining a cutting window in communication with said hollow interior and including an annular edge, said annular edge having a first edge part which extends in a generally axial direction and is configured to excise tissue or bone, and a second edge part extending generally transversely to the axis and including an edge face which angles inwardly as same projects in a direction towards the axis.
Dependencies are inferred from the claim text.