Intramedullary nail
First Claim
1. An intramedullary nail, comprising:
- an elongate body including a proximal end defined by a proximal portion, a distal end defined by a distal portion, a medial side, a lateral side, and a longitudinal axis, said elongate body defining an elongate body periphery, said proximal portion of said elongate body having an interior wall defining a transverse bore extending therethrough, said transverse bore extending from said lateral side to said medial side of said elongate body in a direction transverse to said longitudinal axis of said elongate body, said proximal portion including a cutout positioned adjacent to said transverse bore on said lateral side of said elongate body, said cutout comprising;
a ledge portion extending in a substantially medial-lateral direction and positioned adjacent to a proximal most edge of said wall defining said transverse bore;
a ramp portion defining a substantially planar surface, said ramp portion forming a ramp angle with said longitudinal axis of said elongate body, said ramp angle being between zero degrees and thirty degrees, wherein said ramp portion extends along the longitudinal axis of the elongate body in a distal direction, said ramp portion terminating distally at said elongate body periphery, wherein said ramp portion terminates at a position spaced distally from a distal most edge of said wall defining said transverse bore; and
an intermediate portion positioned between said ledge portion and said ramp portion, said intermediate portion having an intermediate portion radius of curvature;
wherein said ramp portion defines a runout portion defining a substantially planar surface, said runout portion extending in a plane substantially parallel to both said longitudinal axis of said elongate body and a plane tangent to said elongate body periphery at a lateral point of said proximal portion; and
wherein said elongate body further comprises a transition portion extending proximally from said distal portion along said longitudinal axis, said transition portion having a proximal end having a proximal diameter and a distal end having a distal diameter, said proximal diameter being greater than said distal diameter, wherein said runout portion is spaced from said longitudinal axis of said elongate body by a distance greater than one-half of said distal diameter of said transition portion and less than said proximal diameter of said transition portion, wherein said runout portion terminates distally at said transition portion periphery.
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Accused Products
Abstract
The present invention provides an intramedullary nail having a body with a transverse bore extending through the body and having an area of enhanced stress distribution on at least the lateral side of the transverse bore. In one exemplary embodiment, the intramedullary nail includes a cutout adjacent to the transverse bore, such as an oblique cutout, that enhances the stress distribution of the intramedullary nail in the region around the lateral opening of the transverse bore. In one exemplary embodiment, the cutout includes a ramp portion or area that defines the lateral opening of the transverse bore. In other exemplary embodiments, the cutout includes a runout or a substantially flat portion that defines the lateral opening of the transverse bore.
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Citations
12 Claims
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1. An intramedullary nail, comprising:
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an elongate body including a proximal end defined by a proximal portion, a distal end defined by a distal portion, a medial side, a lateral side, and a longitudinal axis, said elongate body defining an elongate body periphery, said proximal portion of said elongate body having an interior wall defining a transverse bore extending therethrough, said transverse bore extending from said lateral side to said medial side of said elongate body in a direction transverse to said longitudinal axis of said elongate body, said proximal portion including a cutout positioned adjacent to said transverse bore on said lateral side of said elongate body, said cutout comprising; a ledge portion extending in a substantially medial-lateral direction and positioned adjacent to a proximal most edge of said wall defining said transverse bore; a ramp portion defining a substantially planar surface, said ramp portion forming a ramp angle with said longitudinal axis of said elongate body, said ramp angle being between zero degrees and thirty degrees, wherein said ramp portion extends along the longitudinal axis of the elongate body in a distal direction, said ramp portion terminating distally at said elongate body periphery, wherein said ramp portion terminates at a position spaced distally from a distal most edge of said wall defining said transverse bore; and an intermediate portion positioned between said ledge portion and said ramp portion, said intermediate portion having an intermediate portion radius of curvature; wherein said ramp portion defines a runout portion defining a substantially planar surface, said runout portion extending in a plane substantially parallel to both said longitudinal axis of said elongate body and a plane tangent to said elongate body periphery at a lateral point of said proximal portion; and wherein said elongate body further comprises a transition portion extending proximally from said distal portion along said longitudinal axis, said transition portion having a proximal end having a proximal diameter and a distal end having a distal diameter, said proximal diameter being greater than said distal diameter, wherein said runout portion is spaced from said longitudinal axis of said elongate body by a distance greater than one-half of said distal diameter of said transition portion and less than said proximal diameter of said transition portion, wherein said runout portion terminates distally at said transition portion periphery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An intramedullary nail, comprising:
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an elongate body including a proximal end defined by a proximal portion, a distal end defined by a distal portion, a medial side, a lateral side, and a longitudinal axis, said elongate body defining an elongate body periphery, said proximal portion of said elongate body having an interior wall defining a transverse bore extending therethrough, said transverse bore extending from said lateral side to said medial side of said elongate body in a direction transverse to said longitudinal axis of said elongate body, said proximal portion including a cutout positioned adjacent to said transverse bore on said lateral side of said elongate body, said cutout comprising; a ledge portion extending in a substantially medial-lateral direction and positioned adjacent to a proximal most edge of said wall defining said transverse bore; a ramp portion defining a substantially planar surface, said ramp portion forming a ramp angle with said longitudinal axis of said elongate body, said ramp angle being between zero degrees and thirty degrees, wherein said ramp portion extends along the longitudinal axis of the elongate body in a distal direction, said ramp portion terminating distally at said elongate body periphery, wherein said ramp portion terminates at a position spaced distally from a distal most edge of said wall defining said transverse bore; and an intermediate portion positioned between said ledge portion and said ramp portion, said intermediate portion having an intermediate portion radius of curvature, wherein said ramp portion defines a runout portion defining a substantially planar surface, said runout portion extending in a plane substantially parallel to both said longitudinal axis of said elongate body and a plane tangent to said elongate body periphery at a lateral point of said proximal portion, wherein said elongate body further comprises a transition portion extending proximally from said distal portion along said longitudinal axis, said transition portion having a proximal end having a proximal diameter and a distal end having a distal diameter, said proximal diameter being greater than said distal diameter, wherein said runout portion is spaced from said longitudinal axis of said elongate body by a distance at least as great as one-half of said distal diameter of said transition portion, and wherein said distal portion has a distal portion periphery and said runout portion is substantially coplanar with a plane tangent to said distal portion periphery at a proximal most point of said distal portion periphery, whereby said runout portion terminates distally at said distal portion periphery. - View Dependent Claims (10, 11, 12)
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Specification