Integrated Control Chart for Vital Signs Early Warning of Long-Term Care Patients

This study used the univariate and multivariate control chart techniques for long-term care patients to look for a variety of the warning range of their vital signs, and proposed the earning warning methods for the individual patient´s vital signs. This study proposed the whole and individual health interval for the four vital signs such as temperature, pulse, respiration and blood pressure in the univariate analysis. According to the four healthy intervals, this study sets three alarm color of red (R), yellow (Y) and green (G) in accordance with the severity. In the multivariate analysis, this study used the Hotelling T2 control chart method to consider three vital signs such as body temperature, pulse and blood pressure at the same time. This study sets the multivariate early warning by using the upper limit identified from the Hotelling T2 control chart and the orange (O) warning light is turned on when the observed value exceeds the upper limit.