Expandable hip stem
AssigneeGlobus Medical, Inc.
InventorsDaniel Scavilla, Marius Cobani, John Loiacono, Kenny Chen, David Stumpo
Life of this patent
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Abstract
Expandable hip stem implants, systems, and methods of implanting a hip stem during a hip arthroplasty are provided. The implant may include a proximal body having a neck terminating at a free end, a distal stem having a proximal portion coupled to the proximal body and a distal portion, and a plurality of expandable bodies aligned around the distal stem. The plurality of expandable bodies have a collapsed configuration and an expanded configuration such that the plurality of expandable bodies expand radially outward away from one another.
Claims10
An implant for a hip arthroplasty comprising:
- a proximal body having a neck terminating at a free end and a channel extending therethrough;
- a distal stem having a proximal portion coupled to the proximal body, a distal portion terminating at a conical end, and a channel extending through the distal stem aligned with the channel of the proximal body;
- a plurality of expandable bodies positioned around the distal stem, each expandable body having an inner surface facing toward the distal stem and an outer surface defining an outer diameter;
- and
- an actuation assembly for moving the plurality of expandable bodies, wherein the plurality of expandable bodies have a collapsed configuration and an expanded configuration such that the plurality of expandable bodies expand radially outward away from one another, thereby enlarging the outer diameter;
- wherein the actuation assembly includes a ramp body with one or more ramp surfaces configured to engage with one or more corresponding ramp surfaces along the inner surfaces of the expandable bodies;
- wherein the ramp body includes a single conical ramp.
An implant for a hip arthroplasty comprising:
- a proximal body having a neck terminating at a free end and a channel extending therethrough;
- a distal stem having a proximal portion coupled to the proximal body, a distal portion terminating at a conical end, and a channel extending through the distal stem aligned coaxially with the channel of the proximal body;
- a plurality of expandable bodies positioned around the distal stem, each expandable body having an inner surface facing toward the distal stem and an outer surface;
- and
- an actuation assembly including a threaded shaft and a ramp body for moving the plurality of expandable bodies, wherein rotation of the threaded shaft translates the ramp body distally, thereby expanding the expandable bodies radially outward.
Dependencies are inferred from the claim text.