Effect of continuous wireless vital sign monitoring on unplanned ICU admissions and rapid response team calls: a before-and-after study

BACKGROUND: Continuous vital sign monitoring may potentially be improved through the use of wearable monitors linked wirelessly to hospital electronic patient records. By improving early detection of physiological deterioration this approach may save lives. METHODS: We performed a single-centre before-and-after study including surgical and medical patients at a university hospital in The Netherlands. The study intervention was continuous vital sign monitoring using wearable monitors linked wirelessly to hospital systems. The co-primary outcomes were unplanned ICU admission and rapid response team calls. Secondary outcomes were length of hospital stay and in-patient death. RESULTS: Our baseline cohort included 2466 admissions and our intervention cohort included 2303 admissions recruited from August 2017 to July 2019. Patients in the intervention cohort experienced fewer unplanned ICU admissions (84 3.4% vs 54 2.3%; P=0.03) and fewer rapid response team calls (107 4.3% vs 71 3.1%; P=0.02). The number of rapid response team calls that did not result in ICU admission also declined (70 2.8% vs 45 2.0%; P=0.05). The number of rapid response team calls that did result in ICU admission was not significantly different (52 2.1% vs 36 1.6%; P=0.16). There were no differences in hospital stay or in-patient deaths between the two study periods. CONCLUSIONS: Continuous monitoring of patient vital signs using wearable monitoring technology linked wirelessly to hospital systems was associated with a reduction in unplanned ICU admissions and rapid response team calls. Further research is necessary to confirm the impact of this approach on patient survival.