A Low-Cost Non-Contact Patient Vital Signs Monitoring Device

This research developed a non-invasive, noncontact device to measure heart rate, respiration rate, and temperature using frequency modulated continuous wave (FMCW) radar and infrared thermography to create a cost-effective non-contact vital signs (NCVS) monitoring system. This technique reduces direct physical contact, enhancing patient safety in high-risk infection areas such as hospitals. For critically ill patients who needed constant monitoring without interrupting their sleep, the device offered continuous monitoring. Contactless patient monitoring reduces invasive procedures, improving patient comfort and treatment protocol adherence, especially in remote areas. Early detection of minor changes in vital signs enables timely interventions, potentially avoiding catastrophic outcomes. Scalability, quick data collection, and decreased staff effort made non-contact monitoring beneficial in resource-limited contexts. The device cost under 300 USD and was tested on 15 young, healthy people. The system exceeded other vital signs monitoring systems in accuracy, dependability, and convenience, reaching 97.28% heart rate, 98.52% breathing rate, and 99.34% temperature accuracy.