Implantable compensating sleeve for an endoprosthesis

An implantable intramedullary compensating sleeve configured for installation around an oblong implant section of a prosthetic stem for the intramedullary treatment of a periprosthetic or interprosthetic fracture, the implantable intramedullary compensating sleeve consisting of:

• a sheath having a sheath body and a lead-through passage extending continuously from a proximal end of the sheath body to a distal end of the sheath body and configured to receive the oblong implant section of the prosthetic stem;
• wherein the sheath body is formed of separate and distinct compensating elements that are radially arranged in a ring and are aligned in a longitudinal direction of the sheath body;
• and
• wherein a continuous longitudinal gap extends between adjacent compensating elements and wherein the compensating elements are flexibly connected together by at least two discrete foldable wires that bridge over the continuous gaps,
• wherein the foldable wires are aligned so as to cross a longitudinal axis of the sheath body, and wherein the foldable wires wrap around the compensating elements and are firmly attached to an outside surface of each of the compensating elements,
• wherein the compensating elements are longitudinally-extending rigid rods,
• wherein the oblong implant section of the prosthetic stem comprises a grooved profile in cross-section,
• wherein when the compensating sleeve is slid on the oblong implant section of the prosthetic stem, a rod of the sheath body at a time engages a groove of the grooved profile of the oblong implant section of the prosthetic stem, and a diameter of the rods corresponds to a depth of the grooves of the grooved profile of the oblong implant section of the prosthetic stem, so that the rods substantially fill the grooves of the grooved profile of the oblong implant section of the prosthetic stem,
• wherein the sheath body is deformable by applying an external application of force on the outside surface of the compensating elements.