Ankle prosthesis resection guide

PREOPERATIVE NAVIGATION SYSTEM Key Benefits Full array of implant choices (INFINITY™, INBONE™, INVISION™) to fit the patient’s specific needs Ability to create a detailed revision surgical plan with or without failed implants currently in place 3D visualization of how to manage bone loss and reconstruct joint height under unique revision conditions PROPHECY Ankle CT Scan Protocol PROPHECY INBONE™ , INFINITY™ and INVISION™ Preoperative Navigation Reports and Guides are patient-specific tools for total ankle replacement surgery. Adherence to this lower extremity CT protocol of the ankle, with knee, is critical for success. In every case, please follow these instructions: Patient Position The foot of interest should be positioned in neutral (90°) to the leg. FIGURE 1 NOTE: If this is not possible due to a patient’s condition, such as severe contracture, ensure the CT scan contains slices through the ball of the foot (see bottom of next page). If a contra-lateral implant is present, bend the contra-lateral limb out of the field of view of the ankle to be scanned. FIGURE 2 Do not allow patient movement between or during scans. Scanning Instructions Helical, axial, and cone beam CT modes are acceptable. Bone or Standard algorithms are acceptable. No contrast agent is to be used. All scan groups’ edges should stay aligned. See dashed lines, next page. • Maintain a single coordinate system for both the knee and foot scan. • Maintain a consistent field of view and pixel size for both the knee and foot scan. • Adjusting the width of both knee and foot groups together to span the required anatomy of both groups is appropriate.