The Epidemiology of Emergency Calls in a Tertiary Emergency Department for Admitted Patients: A TECOR Study

Emergency calls, including medical emergency team and code blue calls, aim to respond to and assess patients at an earlier stage of clinical deterioration (to potentially avoid cardiac arrest and death). With an increasing prevalence of hospital access block, more admitted patients are boarding in the Emergency Department (ED). Although emergency calls were traditionally a ward-based system, they are now occurring more often in the ED. Large variations exist in the staffing mix and specialist skill sets between ED- and ward-based care. There is a paucity of evidence describing the epidemiology of patients that require emergency calls in the ED setting. Objectives: We aim to evaluate the population of adult patients that require emergency calls in our tertiary ED. Methods: This study utilised the Tasmanian Emergency Care Outcomes registry (TECOR) to perform a retrospective cohort study of emergency calls occurring over a 13-month period. Descriptive statistics are used to summarize the data. Categorical variables are presented as frequencies and their percentages and continuous variables are depicted as means and standard deviations (SDs) or medians and interquartile ranges (IQRs), as appropriate. Results: There were 600 emergency calls in the ED, involving 423 unique patients and 596 (99.33%) MET calls. The mean patient age was 68.68 years (SD 17.87). The mean ED length of stay for patients with an emergency call was 18.28 h (SD 8.96). Calls made were predominantly for systolic blood pressure < 90 mmHg (310, 51.67%). The mean duration of an emergency call was 40.89 min (SD 20.48). Most patients had a single emergency call (311, 73.18%). For our cohort, goals of care remained unchanged following 341 (56.83%) emergency calls. Conclusions: Emergency calls in the ED are uncommon, representing 2.08% of all admissions from the ED. Patients in the ED requiring an emergency call have a mean length of stay twice that of all ED presentations. Recognising and responding early to address the concerns that trigger a call may help to mitigate this additional burden. More research is required to explore the factors that will lead to effective and appropriate care before, during, and after an ED emergency call is made.