Advancing Sleep Diagnostics: Contactless Multi-Vital Signs Continuous Monitoring with a Multimodal Camera System in Clinical Environment

Non-contact measurements methods are expected to expand the application scenarios of vital signs monitoring with better hygiene and comfort. This study presents a clinical verification of contactless nocturnal vital signs monitoring through a 3D multimodal camera system. The camera system integrates a combination of color (RGB), 3D, thermal, and two near-infrared (NIR) images modalities, which facilitates comprehensive monitoring of vital signs, such as heart rate (HR), respiratory rate (RR), body temperature (BT), and oxygen saturation (SpO2). The performance is validated through continuous nocturnal measurements of 23 sleep disorder patients at a sleep laboratory. Compared with simultaneous polysomnography (PSG) recordings, the mean absolute error (MAE) of HR, RR and SpO2 measurement are 2.17 beats per minute (bpm), 2.09 breaths per minute (bpm) and 2.07% respectively. PSG does not include a reference body temperature measurement, however the measured values are within the expected range. The result demonstrates good precision and notable agreement with the gold standard, indicating the potential of this camera system to serve as a patient-friendly and convenient alternative for vital signs monitoring and sleep diagnostics in clinical environments.