305 Analysis of the video motion tracking system ‘Kinovea’ to assess surgical movements during robot-assisted radical prostatectomy. Methods Subjects For this study existing videos of RARP procedure were used of patients who underwent a robot assisted radical prostatectomy in a specialized cancer hospital in the Netherlands between June 2009 and February 2017. All of the patients were operated by the same expert robotic surgeon (HvdP), who had performed >220 RARP procedures before June 2009 and has currently performed >2100 RARP procedures using the daVinci Si surgical robot by Intuitive. Exclusion criteria were urinary incontinence prior to surgery, and Surgeries where no or incomplete video material was available. All of the men included had localized prostate cancer (cT1c-cT3a, Nx-N0, Mx-M0). Design The study design was a pilot study in order to investigate if Kinovea is suitable to use in robot assisted surgery. Patient results were obtained prospectively. The follow-up was at least 12 months. Cases were anonymized and labelled with study codes, meaning the researcher was blinded to all patient characteristics and outcomes. This study was granted approval from the institutional medical committee. Automated surgical movements assessment using Kinovea. The surgical movements of the instrument were tracked using the Kinovea software. The primary outcome measurements are the total time analysed (minutes), and percentage of surgery analysed (%). The secondary outcome measurements are total path length (cm), number of sudden movements (defined as more than 1 cm movement of the instrument per frame of the surgical video), and average speed (cm/s). The Kinovea software is deemed valid if it is able to track > 80% of the duration of the surgery. The instrument controlled by the right robotic arm (controlled by the dominant hand of the surgeon) was used for the analysis using Kinovea. For every video excel sheets containing automatic calculations of the total distances and velocities per trajectory were downloaded from Kinovea. These results were compared to the total distances, average velocities and numbers of sudden movements calculated using manual formulas based on Ganni, et al.’s article (Table 1)9 .
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