METHOD FOR SURGICAL MANAGEMENT OF ASEPTIC INSTABILITY OF MODULAR ONCOLOGICAL HUMERAL ENDOPROSTHESIS WITH INDIVIDUAL SHORTENING OF ENDOPROSTHESIS LEG AND WITH CEMENTLESS FIXATION Russian patent published in 2025 - IPC A61B17/72 A61F2/40 

FIELD: medicine.

SUBSTANCE: invention refers to medicine, namely to traumatology and orthopaedics, and can be used for treating aseptic instability of a modular oncological humeral endoprosthesis using an endoprosthesis with an individual shortened segment of cementless fixation. Surgical management is preceded by spatial visualization of an aseptically unstable oncological humeral endoprosthesis; the state of the surrounding soft tissues, vascular and nerve structures is assessed. After performing the anaesthesia and treating the surgical site with an antiseptic solution in the supine position, the skin and subcutaneous fat are incised along the anterolateral surface of the shoulder with excision of the old postoperative scar; then, the fascia is dissected, the biceps muscle of the shoulder is removed, and the capsule of the endoprosthesis is approached. Capsule of the endoprosthesis is opened and an unstable oncological humeral endoprosthesis is visualized. Oncological humeral endoprosthesis is disassembled, and the unstable intraosseous leg of the oncological endoprosthesis is removed. Resection is performed to a size determined by the result of multilayer spiral computed tomography. Humerus canal is cleaned of connective tissue and bone cement. Rimmers are used to develop the humerus canal for the required size. Individual short stem of the endoprosthesis with press-fit fixation is implanted. Individual guide is used to block leg with 2-3 screws. Endoprosthesis of the required length of reconstruction is assembled and connected to the stable part. Silicone drainage with active aspiration is installed, the wound is closed in layers.

EFFECT: method provides restoring the functional and motor capabilities of the patient and preserving the anatomical position of the humeral organs, as well as improving the patient’s quality of life due to the peculiarities of the procedure.

1 cl, 3 ex