I. Introduction
Fall among the elderly is a significant public health problem [1], which can lead to severe consequences, such as fractures or coma [2]. The time spent lying on the floor after a fall is also one of the critical factors determining the severity of the fall [3]. Lying down for a long time after a fall can lead to hypothermia, pneumonia, and bedsores [4]. The earlier people who fall are detected and treated, the lower the morbidity and mortality [5]. Therefore, timely detection and treatment after a fall are essential.