Tu1457 Preventive Coagulation in 2nd-Look Endoscopy Reduces Delayed Bleeding After Gastric Endoscopic Submucosal Dissection

(rho 0.90, p 0.001) and PL4 (rho 0.82, p 0.01). Maximal velocity for sensor 4 was associated with longer T (rho 0.77, p 0.016), longer PL3 (rho 0.82, p 0.01), and longer PL4 (rho 0.88, p 0.002). Increased maximum angular velocity was associated with longer T (rho 0.82, p 0.01), longer PL3 (rho 0.73, p 0.02) and longer PL4 (rho 0.75, p 0.02). Increased maximum scope tip angulation was associated with longer PL2 (rho 0.77, p 0.02), longer PL3 (rho 0.70, p 0.04), and trend towards longer PL4 (rho 0.60, p 0.09). Increase in PL3 and PL4 without increase in PL1 and PL2 indicates increased scope flex; therefore, increased scope insertion velocity and increased maximum angular velocity are each associated with increased flex and longer time to cecum.TLI and VAS are summarized in Table 1. Conclusion: These preliminary results suggest that experts have significantly reduced path length compared to novices, and that experts demonstrate shorter exam times, with reduced flex, acceleration and jerk implying steady scope advancement, gradual angular modifications, and deliberate direction changes. TLI and VAS substantiate these kinematic findings. As sample size increases, we intend to better characterize expert gestures to support development of tools for more effective training and objective quantitative assessment.