Fig. 1: Schematic illustration of the flexible sensor system.

a The flexible sensor is mounted on the radial tuberosity of the wrist to capture the pulse signal, which is then processed to ascertain real-time respiratory status using the ResNet-BiLSTM model. b A schematic layout of the system is provided, showcasing the integration of the pulse detection sensor and the flexible circuit for data acquisition and processing. c Detailed diagram of the data acquisition and processing flexible circuit