Navigation and Image Injection for Control of Bone Removal and Osteotomy Planes in Spine Surgery.

Background And Importance: In contrast to cranial interventions, neuronavigation in spinal surgery is used in few applications, not tapping into its full technological potential. We have developed a method to preoperatively create virtual resection planes and volumes for spinal osteotomies and export 3-D operation plans to a navigation system controlling intraoperative visualization using a surgical microscope's head-up display. The method was developed using a Sawbone ® model of the lumbar spine, demonstrating feasibility with high precision.

Evaluation of surgical technique on outcomes from ruptured aneurysms of the middle cerebral artery.

Objective: To determine the effect of surgical technique on outcomes from ruptured middle cerebral artery aneurysms (RMCAA).

Methods: A retrospective review was performed of patients with RMCAA, who were treated at the authors' institutions. The study compares the clipping efficacy, the postoperative CT findings as well as the clinical outcome in 87 acute operated patients.