Intramedullary nail
AssigneeZimmer, Inc.
InventorsRichard F. Kyle, Robert A. Winquist, George E. Simpson, John D. Miser, Mark A. Bryant
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Abstract
An intramedullary nail is disclosed having a tubular elongated body that includes a proximal head portion, an intermediate portion and a distal end portion. The intermediate portion has a longitudinal slot along one side thereof, a groove coextensive with a portion of the slot, and three other grooves spaced about the circumference of the body. This construction provides more desirable flexibility and allows improved revascularization about the nail. The nail is formed of a rod material and the slot and grooves are machined therein to the desired depth and shape.
Claims17
An intramedullary nail comprising
- an elongated body having a proximal head portion with a proximal end, a distal end portion with a distal end and an intermediate portion interconnecting said proximal head portion and said distal end portion;
- said elongated body having a centrally located longitudinal bore through the center thereof, said longitudinal bore having a predetermined diameter;
- said proximal head portion having at least one proximal locking screw hole through said proximal head portion intersecting said longitudinal bore;
- said elongated body having a longitudinally elongated slot along an anterior side thereof, said slot longitudinally extending from said distal end to beyond said at least one proximal locking screw hole, said slot radially extending from said bore outwardly to an outer periphery of said elongated body, said slot radially extending transverse to a plane defined by said at last one proximal locking screw hole and said longitudinal bore, said slot having a widened portion substantially longitudinally coextensive with said intermediate portion, said widened portion having a width substantially equal to said diameter of said longitudinal bore;
- said intermediate portion having three longitudinally elongated grooves spaced about an outer periphery of said intermediate portion, a first one of said grooves being disposed on a posterior side of said intermediate portion diametrically opposite from said elongated slot, a second one of said three grooves being disposed 90 degrees circumferentially from said slot and said first groove, and a third one of said three grooves being disposed diametrically opposite from said second groove.
An intramedullary nail comprising a longitudinally elongated body having a proximal head portion, a distal end portion and an intermediate portion interconnecting said proximal head portion and said distal end portion;
- a centrally located longitudinal bore of predetermined diameter extending through said elongated body;
- a longitudinally elongated slot formed along an anterior side of said elongated body, said slot radially extending from said bore outwardly to an outer periphery of said elongated body and having a widened portion coextensive with said intermediate portion of a width substantially equal to said diameter of said longitudinal bore;
- at least two longitudinally elongated grooves spaced about an outer periphery of said intermediate portion.
Dependencies are inferred from the claim text.