Mass Casualty Management After a Boiling Liquid Expanding Vapor Explosion in an Urban Area.

BACKGROUND: The catastrophic fail of a container holding a pressure-liquified gas can generate a boiling liquid expanding vapor explosion (BLEVE) with a subsequent blast wave, flying fragments, and fire or toxic gas release. CASE REPORT: This report describes the management of a mass casualty disaster related to a BLEVE in an urban area due to a highway accident involving a tanker carrying liquified petroleum gas and a truck transporting chemical solvents. The event resulted in 158 casualties that were triaged, stabilized, and transported into the "hub" and "spoke" hospitals of the regional trauma network within 3 h and 22 min from the event by the Emergency Medical Services. The logistic complications related to the partial collapse of the highway bridge on an underlying urban road and the relative solutions adopted, as well as the application and advantages of the use of the Simple Triage and Rapid Treatment (START) algorithm in the field and the criteria adopted for the distribution of patients within the trauma network, are discussed, along with the potential pitfalls observed. WHY SHOULD AN EMERGENCY PHYSICIAN BE AWARE OF THIS?: BLEVE events are rare but can be complex in both logistical management and clinical presentation of the lesions related to the event. The START algorithm is a valuable tool for rapid triage in mass casualty incidents.

The stroke mothership model survived during COVID-19 era: an observational single-center study in Emilia-Romagna, Italy.

INTRODUCTION: A reduction of the hospitalization and reperfusion treatments was reported during COVID-19 pandemic. However, high variability in results emerged, potentially due to logistic paradigms adopted. Here, we analyze stroke code admissions, hospitalizations, and stroke belt performance for ischemic stroke patients in the metropolitan Bologna region, comparing temporal trends between 2019 and 2020 to define the impact of COVID-19 on the stroke network. METHODS: This retrospective observational study included all people admitted at the Bologna Metropolitan Stroke Center in timeframes 1 March 2019-30 April 2019 (cohort-2019) and 1 March 2020-30 April 2020 (cohort-2020). Diagnosis, treatment strategy, and timing were compared between the two cohorts to define temporal trends. RESULTS: Overall, 283 patients were admitted to the Stroke Center, with no differences in demographic factors between cohort-2019 and cohort-2020. In cohort-2020, transient ischemic attack (TIA) was significantly less prevalent than 2019 (6.9% vs 14.4%, p = .04). Among 216 ischemic stroke patients, moderate-to-severe stroke was more represented in cohort-2020 (17.8% vs 6.2%, p = .027). Similar proportions of patients underwent reperfusion (45.9% in 2019 vs 53.4% in 2020), although a slight increase in combined treatment was detected (14.4% vs 25.4%, p = .05). Door-to-scan timing was significantly prolonged in 2020 compared with 2019 (28.4 ± 12.6 vs 36.7 ± 14.6, p = .03), although overall timing from stroke to treatment was preserved. CONCLUSION: During COVID-19 pandemic, TIA and minor stroke consistently reduced compared to the same timeframe in 2019. Longer stroke-to-call and door-to-scan times, attributable to change in citizen behavior and screening at hospital arrival, did not impact on stroke-to-treatment time. Mothership model might have minimized the effects of the pandemic on the stroke care organization.