Epidemiology of mass casualty incidents in the United States.

OBJECTIVE: We sought to characterize and estimate the frequency of mass casualty incidents (MCIs) occurring in the United States during the year 2010, as reported by emergency medical services (EMS) personnel. METHODS: Using the 2010 National EMS Database of the National Emergency Medical Services Information System (NEMSIS), containing data from 32 states and territories, we estimated and weighted the frequency of MCIs documented by EMS personnel based on their perception of the event to produce incidence rates of MCIs per 100,000 population and MCIs per 1,000 9-1-1 calls requesting EMS service. We conducted descriptive analyses to characterize the MCIs by geographic location, incident type, and time of day as well as the MCI patients by demographic and health information. We used chi-squared tests to compare response delays and two-tailed t-tests to compare system response times between EMS responses documented as MCIs and those not. RESULTS: Among the 9,776,094 EMS responses in the 2010 National EMS Database, 14,504 entries were documented as MCI. These entries represented an estimated 9,913 unique MCIs from the National EMS Database: 39.1% occurred in the South Atlantic region of the United States where only 19.1% of the population resides, 60.9% occurred in an urban setting, and 58.4% occurred on a street or highway. There were an estimated 13,677 MCI patients. The prehospital EMS personnel's primary impressions of the patients ranged from electrocution (0.01%) to traumatic injury (40.7%). Of the patients with a primary impression of injury (N = 7,960), motor vehicle traffic crash was the cause of injury for 62.7%. Among the MCI EMS responses, 47.6% documented experiencing a response delay compared to only 12.3% of non-MCI EMS responses. CONCLUSIONS: This study demonstrates the range of health conditions and characteristics of EMS responses that EMS personnel perceive as MCIs, suggests that response delays are common during MCIs, and indicates there may be underreporting of all persons involved in an MCI. The National EMS Database is useful for describing MCIs and may help guide national leadership in strengthening EMS system preparedness for MCIs.

Rural mass casualty preparedness and response: the Institute of Medicine's Forum on Medical and Public Health Preparedness for Catastrophic Events.

The Institute of Medicine's Forum on Medical and Public Health Preparedness for Catastrophic Events hosted a workshop at the request of the Federal Interagency Committee on Emergency Medical Services (FICEMS) that brought together a range of stakeholders to broadly identify and confront gaps in rural infrastructure that challenge mass casualty incident (MCI) response and potential mechanisms to fill them. This report summarizes the presentations and discussions around 6 major issues specific to rural MCI preparedness and response: (1) improving rural response to MCI through improving daily capacity and capability, (2) leveraging current and emerging technology to overcome infrastructure deficits, (3) sustaining and strengthening relationships, (4) developing and sharing best practices across jurisdictions and sectors, (5) establishing metrics research and development, and (6) fostering the need for federal leadership to expand and integrate EMS into a broader rural response framework.

Gauging U.S. Emergency Medical Services workers' willingness to respond to pandemic influenza using a threat- and efficacy-based assessment framework.

BACKGROUND: Emergency Medical Services workers' willingness to report to duty in an influenza pandemic is essential to healthcare system surge amidst a global threat. Application of Witte's Extended Parallel Process Model (EPPM) has shown utility for revealing influences of perceived threat and efficacy on non-EMS public health providers' willingness to respond in an influenza pandemic. We thus propose using an EPPM-informed assessment of EMS workers' perspectives toward fulfilling their influenza pandemic response roles. METHODOLOGY/PRINCIPAL FINDINGS: We administered an EPPM-informed snapshot survey about attitudes and beliefs toward pandemic influenza response, to a nationally representative, stratified random sample of 1,537 U.S. EMS workers from May-June 2009 (overall response rate: 49%). Of the 586 respondents who met inclusion criteria (currently active EMS providers in primarily EMS response roles), 12% indicated they would not voluntarily report to duty in a pandemic influenza emergency if asked, 7% if required. A majority (52%) indicated their unwillingness to report to work if risk of disease transmission to family existed. Confidence in personal safety at work (OR = 3.3) and a high threat/high efficacy ("concerned and confident") EPPM profile (OR = 4.7) distinguished those who were more likely to voluntarily report to duty. Although 96% of EMS workers indicated that they would probably or definitely report to work if they were guaranteed a pandemic influenza vaccine, only 59% had received an influenza immunization in the preceding 12 months. CONCLUSIONS/SIGNIFICANCE: EMS workers' response willingness gaps pose a substantial challenge to prehospital surge capacity in an influenza pandemic. "Concerned and confident" EMS workers are more than four times as likely to fulfill pandemic influenza response expectations. Confidence in workplace safety is a positively influential modifier of their response willingness. These findings can inform insights into interventions for enhancing EMS workers' willingness to respond in the face of a global infectious disease threat.