Surgical tool arrangement and surgical cutting accessory for use therewith
AssigneeStryker Corporation
InventorsBryan G. DEENY, James M. HAYES, Brian FOUTS
Life of this patent
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Abstract
A surgical tool arrangement for performing endoscopic surgical procedures which includes a powered handpiece and a surgical cutting accessory which detachably connects to the handpiece. The cutting accessory incorporates a cutting head for resecting tissue and a suction arrangement at the distal end of the cutting accessory closely adjacent the cutting head which suction arrangement serves to evacuate tissue from the surgical site and additionally serves as a cleaning mechanism for the surgical cutting accessory. The accessory additionally incorporates a bearing arrangement for supporting the cutting element as same rotates within the housing element.
Claims20
Surgical cutting accessory comprising:
- a housing element including a hub and a housing tube projecting distally from said hub and being formed by a generally tubular wall defining an interior of said housing tube, said housing tube having a proximal end and a distal end spaced from said proximal end, said distal end defining a window therein;
- a cutting element including a hub and a shaft fixed to and projecting distally from said hub of said cutting element, said shaft being disposed within said interior of said housing tube for rotational movement relative thereto, said shaft having a distal end including a cutting head which defines a tissue-cutting feature thereon, said distal end of said shaft having a portion disposed proximally of said tissue-cutting feature, said portion defining an outer bearing surface having an outer diameter slightly less than an inner diameter of an adjacent inner surface of said tubular wall of said housing tube at said distal end thereof, said outer bearing surface and said inner surface of said housing tube together forming a distal bearing for supporting said distal end of said shaft relative to said distal end of said housing tube, said window of said housing tube being sized to expose a portion of said cutting feature of said cutting head, said proximal end of said housing tube projecting in a proximal direction from said hub of said housing element for cooperation with a surface of said hub of said cutting element, said proximal end of said housing tube and said surface of said hub of said cutting element together forming a proximal bearing for supporting a proximal end of said shaft relative to said housing element.
A surgical cutting accessory for use with a powered surgical handpiece, said accessory comprising an outer housing element having a proximal end and a distal end spaced therefrom and formed from a generally tubular wall, said distal end defining an axis, said accessory further including an inner cutting element disposed within said outer housing element for rotation relative thereto, said wall of said outer housing element defining therein a window at said distal end, said inner cutting element having a distal end including a cutting head which defines a cutting feature thereon, said distal end of said inner cutting element having a portion formed from a generally tubular wall, said inner cutting element including a suction opening disposed in said wall of said inner cutting element closely axially adjacent said cutting feature, said suction opening communicating with a hollow interior of said inner cutting element and a suction source, said suction opening being partially defined by a cutting edge formed on said wall of said distal end of said inner cutting element, said window being partially defined by a cutting edge formed on said wall of said distal end of said outer housing element, said cutting edge of said suction opening being disposed axially adjacent to said cutting edge of said window, said window having a perimeter sized to expose a portion of said cutting feature, said suction opening and said cutting edge thereof being at least partially exposed through said window at least during rotation of said inner cutting element.
Dependencies are inferred from the claim text.