Surgical rasping systems and methods
AssigneesIMDS Corporation, Keith S. Nelson
InventorsKeith J. Nelson, Nathan D. Hansen, M. Mary Sinnott, Joseph Q. Marietta
Life of this patent
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Abstract
A surgical rasping system functional in multiple orthopedic applications, including but not limited to shoulder, knee, hip, wrist, ankle, spinal, or other joint procedures. The system comprises a rasping head which may be low profile and offer a flat cutting/rasping surface, and is configured to be driven by an attached hub that translates a rotational movement into a reciprocating motion. Suction for removal of bone fragments or other tissues is provided through an opening spaced apart from or adjacent to the rasping surface.
Claims14
A tissue removal device for being driven by a powered rotary handpiece, comprising:
- a rotary hub having a distal end and a proximal end;
- a tissue removal member having a distal end comprising a tissue removal surface and a proximal end, the tissue removal member proximal end coupled in sliding contact with the rotary hub;
- and
- a motion conversion mechanism comprising a housing, a cam surface and a cam follower surface, wherein the cam follower surface comprises at least one hollow complementarily fitting at least one lobe of the cam surface;
- wherein when the rotary hub is rotated about an axis, the motion conversion mechanism urges motion of the tissue removal member along the axis, wherein the motion consists of reciprocating translation of at least the distal end of the tissue removal member between a first retracted position and a second extended position, wherein in the first extended position the cam follower surface and the cam surface are flush;
- the housing disposed around a portion of the tissue removal member and a portion of the rotary hub, the housing having a proximal end, a distal end and the cam surface facing proximally;
- wherein the rotary hub distal end terminates in a distal end face, the distal end face comprising the cam follower surface;
- the tissue removal member further comprising:
- a shaft key comprising a proximal groove on the outside of a key body, wherein the proximal groove engages a ring for retention within the rotary hub, the shaft key further comprising distal wings configured to fit into recesses of the housing, wherein the distal wings of the shaft key cooperate with the recesses of the housing to prohibit rotary motion of the tissue removal member.
A tissue removal device for being driven by a powered handpiece, comprising:
- a tissue removal member having a distal end, a proximal end, and a shaft extending therebetween along a longitudinal axis;
- a housing comprising a bore extending longitudinally therethrough;
- a sleeve member having a distal end and a proximal end, the sleeve member fixed to the housing in coaxial alignment with the bore, the tissue removal member extending through the bore and the sleeve member;
- a motion mechanism;
- wherein when the motion mechanism is connected to the powered handpiece, the motion mechanism urges motion of the tissue removal member along the axis, wherein the motion consists of reciprocating translation between a first retracted position and a second extended position along a solitary axis,
- wherein the proximal end of the tissue removal member comprises a shaft key comprising a proximal groove on the outside of a key body, wherein the proximal groove engages a ring for retention within a rotary hub, the shaft key further comprising distal wings configured to fit into recesses of the housing, wherein the distal wings of the shaft key cooperate with the recesses of the housing to prohibit rotary motion of the tissue removal member.
Dependencies are inferred from the claim text.