Das LISS-System als neues minimal-invasives winkelstabiles Verfahren zur Versorgung periprothetischer Femurfrakturen

摘要: The Less Invasive Stabilization System (LISS) is a minimally invasive technique indicated for fixation of periprosthetic fractures. This new system allows percutaneous placement cortical-shaft screws and the fracture with fixed-angle locked minimal surgical exposure mostly osteoporotic bone without disturbance existing total joint replacement. Immediate range-of-motion exercises are begun postoperatively. A retrospective clinical review 5 patients (2 hip arthroplasties, 3 knee arthroplasties) was performed to describe indications, technique, intra- postoperative complications patient follow-up. Indications distal femur fractures, per- supracondylar Contraindications none, except medical comorbidities. Extraarticular fractures were treated via stab incisions over lateral femoral condyle. Fractures intraarticular displacement fixed an anterolateral parapatellar approach joint. After anatomic reduction condyles, articular fragments Kirschner wires, followed by closed aligning controlling length, axis rotation. LISS introduced proximally under M. vastus lateralis along femur. It self-drilling cortical shaft screws, both distally. Range-of-motion on second day Time full weight bearing averaged 6-8 weeks depending radiological findings. Benefits include increased primary stability using monocortical fixings thus eliminating need spongiosaplasty blood transfusion. Disadvantages malplacement femur, proximal screw pull-out rotational axial malalignment.