Dynamic Multiaction Recognition and Expert Movement Mapping for Closed Pelvic Reduction

Abstract

Pelvic fractures are one of the most serious traumas in orthopedic care, and reduction during routine surgery is a significant challenge. Because there are so many vital organs, blood vessels, and nerves around the pelvis, and the reduction force is large, the operational requirements for the surgeon are extremely strict and require extensive experience and surgical skills. This paper proposes a method for collecting and digitizing doctors' reduction movements, which aims to help intelligent devices recognize surgeons' reduction actions and provides a means to learn from expert experience to improve the accuracy of surgery. First, the Conv-BiLSTM algorithm with multilayer cross-fused features is proposed. It extracts time and spatial correlations between multimodal data in a hierarchical manner. Second, discrete dynamic motion primitives (DMPs) are adopted for mapping the surgeon's palm movement trajectory. Finally, this paper constructs a data acquisition platform and collects data from surgeons with varying proficiency in closed reduction. Experiment results show that the closed reduction action recognition accuracy is 99% and posture recognition accuracy is 95.5%. The recognition algorithm proposed by this paper is significantly higher than the commonly used algorithms in terms of Accuracy, Precision, Recall, and F1-Score. This work provides methods and means for the digitization of surgical expertise and transfers learning for robot-assisted surgery.