Long bone reamer with depth stop indicator
AssigneeDePuy Orthopaedics, Inc.
InventorsAlfred F. DeCarlo, Jr., Patricia Katzman
Life of this patent
Estimating the term…
Abstract
The present invention provides an orthopaedic instrument system and method for reaming a long bone to a predetermined depth. The instrument system includes an elongate reamer having a proximal portion and a bone contacting surface with an integral cutting element. A stop indicating sleeve having an axial bore and a stop indicating element is removably disposed about the reamer. The stop indicating sleeve may be provided with a stop element and a distal bone contacting surface. Reaming beyond the predetermined reaming depth forces the stop indicating sleeve proximally and urges the stop element on the sleeve into engagement with a stop engaging element provided on the reamer.
Claims40
An orthopedic instrument system for reaming a long bone comprising:
- a fixed length elongate reamer having a proximal portion, a bone contacting outer surface, at least one bone cutting element integral with the bone contacting outer surface, and a single stop engaging element disposed thereon;
- and
- a stop indicating sleeve comprising a substantially cylindrical sleeve defining an axial bore, the sleeve being removably disposed about the elongate reamer and having a bone contacting distal end and a stop element, the stop element being selectively movable between a first, disengaged position in which the stop element does not engage the stop engaging element on the reamer, and a second, engaged position wherein the stop element engages the stop engaging element to prevent proximal motion of the stop indicating sleeve relative to the reamer;
- wherein the stop element is biased to the second, engaged position;
- and
- wherein, at a predetermined reaming depth, the bone contacting distal end of the sleeve contacts a portion of the long bone not reamed by the elongate reamer and the stop element on the sleeve engages the stop engaging element disposed on the reamer to prevent the reamer from reaming the long bone further than the predetermined reaming depth.
An orthopedic instrument system for reaming a long bone comprising:
- an elongate reamer having a proximal portion, a bone contacting outer surface, at least one bone cutting element integral with the bone contacting outer surface, and a stop engaging element disposed thereon;
- and
- a stop indicating sleeve comprising a substantially cylindrical sleeve defining an axial bore, the sleeve being removably disposed about the elongate reamer and having a bone contacting distal end and a stop element;
- wherein, at a predetermined reaming depth, the bone contacting distal end of the sleeve contacts a portion of the long bone not reamed by the elongate reamer and the stop element on the sleeve engages the stop engaging element disposed on the reamer to prevent the reamer from reaming the long bone further than the predetermined reaming depth;
- wherein the stop indicating sleeve includes at least one pin engageable within at least one slot provided on the proximal portion of the reamer;
- and
- wherein the at least one slot provided on the proximal portion of the reamer has a longitudinal portion and a transverse portion.
An orthopedic instrument kit for reaming a long bone comprising:
- a fixed length elongate reamer having a proximal portion, a bone contacting outer surface, and at least one bone cutting element integral with the bone contacting outer surface;
- and
- a plurality of fixed length interchangeable stop indicating sleeves engageable with the reamer, each sleeve having a different length and comprising a substantially cylindrical sleeve defining an axial bore removably disposed about the elongate reamer and a stop indicating element;
- wherein, for a stop indicating sleeve selected from the plurality of stop indicating sleeves for reaming to a predetermined reaming depth engaged with the fixed length reamer, the stop indicating element indicates that the reamer has reached the predetermined depth.
A method for reaming a long bone to a predetermined depth comprising the steps of:
- providing an elongate reamer having a proximal portion, a bone contacting outer surface, at least one bone cutting element integral with the bone contacting outer surface;
- providing a plurality of fixed length interchangeable stop indicating sleeves, each sleeve having a different length, comprising a substantially cylindrical sleeve defining an axial bore removably disposed about the elongate reamer and a stop indicating element;
- selecting a stop indicating sleeve having a desired length corresponding to a predetermined reaming depth for the reamer;
- engaging a long bone with the reamer to create a bore within the bone of increasing depth wherein, at a predetermined reaming depth, the stop indicating element indicates that the predetermined depth has been reached;
- and
- ceasing increasing the depth of the reamed bore and disengaging the reamer from the long bone.
Dependencies are inferred from the claim text.