Factors Associated with Revision Surgery after Internal Fixation of Hip Fractures

Background: Femoral neck fractures are associated with high rates of revision surgery after management with internal fixation. Using data from the Fixation using Alternative Implants for the Treatment of Hip fractures (FAITH) trial evaluating methods of internal fixation in patients with femoral neck fractures, we investigated associations between baseline and surgical factors and the need for revision surgery to promote healing, relieve pain, treat infection or improve function over 24 months postsurgery. Additionally, we investigated factors associated with (1) hardware removal and (2) implant exchange from cancellous screws (CS) or sliding hip screw (SHS) to total hip arthroplasty, hemiarthroplasty, or another internal fixation device. Methods: We identified 15 potential factors a priori that may be associated with revision surgery, 7 with hardware removal, and 14 with implant exchange. We used multivariable Cox proportional hazards analyses in our investigation. Results: Factors associated with increased risk of revision surgery included: female sex, [hazard ratio (HR) 1.79, 95% confidence interval (CI) 1.25-2.50; P = 0.001], higher body mass index (fo

HIGH-PERFORMANCE VISUALIZATION OF UAS SENSOR AND IMAGE DATA WITH RASTER MAPS AND TOPOGRAPHY IN 3D

The large amounts of data collected during a typical flight with an unmanned aerial vehicle creates challenges for rapid analysis and inspection. A single two-hour flight can collect about 7200 images if the camera captures at 1 Hz, yielding about 20 GB of data. Additional instruments and sensors all add to the size and complexity of the dataset generated by a flight. Efficient visualization of data is one way to deal with the resulting complexity. This paper presents Norut Geo Viz, a system for visualizing data from unmanned aerial vehicles both in realtime and after landing in 3D on a virtual globe. The system has been developed from the ground up to provide control and customizability of the resulting visualization. The architecture, design and implementation of the system is presented, as well as experiences using the system for visualization in the field during flight campaigns conducted by Norut