Nested expandable sleeve implant
AssigneeDePuy Synthes Products, Inc.
InventorHarry Thomas Hall
Life of this patent
Estimating the term…
Abstract
An expandable implant for treating bone preferably in a minimally invasive manner includes a preferably cylindrical core element extending along a longitudinal axis and preferably a plurality of nestable, expandable sleeves extending along a longitudinal axis for placement radially about the core element. The plurality of nestable sleeves are sequentially insertable over the core element in such a manner that a first nestable sleeve is inserted over the core element and each subsequently inserted nestable sleeve is received between the core element and the previously inserted nestable sleeve such that the insertion of each additional sleeve causes each previously inserted sleeve to outwardly expand.
Claims20
A kit configured to form an expandable implant for treating bone, the kit comprising:
- a core element including a core body that defines a proximal end and a distal end spaced from the proximal end along a first direction, the core element further including a stop that extends radially out from the core body proximate to the distal end, the core defining a core thickness along a second direction that is perpendicular to the first direction;
- and
- a plurality of radially expandable sleeves configured to be sequentially insertable over the core element along the first direction in such a manner that each of the plurality of expandable sleeves is configured to overlay another one of the plurality of expandable sleeves with respect to the second direction so as to form the expandable implant, each of the plurality of expandable sleeves defining a fixed thickness along the second direction,
- wherein the stop is configured to limit insertion of one or more of the plurality of expandable sleeves along the first direction relative to the core element.
A system for treating bone, the system comprising:
- a rigid core element having an instrument engagement feature, the core defining a proximal end and a distal end spaced from the proximal end along a first direction;
- an insertion instrument that includes a rod element having a core element engagement feature that is configured to mate with the instrument engagement feature to thereby selectably couple the core element to the insertion instrument;
- and
- a plurality of expandable sleeves that are configured to be advanced along the rod element and onto the core element, in such a manner that each of the plurality of expandable sleeves is configured to overlay another one of the plurality of expandable sleeves along the core element with respect to a second direction that is perpendicular to the first direction.
A method of treating bone in a minimally invasive manner, the method comprising the steps of:
- inserting a core element that is attached to a rod element of an insertion instrument into a cavity defined by the bone;
- advancing a first expandable sleeve along the rod element and onto the core element;
- and
- advancing at least one additional expandable sleeve along the rod element and onto the core element between the core element and the previously inserted expandable sleeve, thereby causing radial expansion of the previously inserted expandable sleeve.
Dependencies are inferred from the claim text.