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Introduction: A mass casualty incident (MCI) is unpredictable and involves many casualties at the same time and place. This brief report will present the results from an evaluation a full-scale MCI exercise, aiming to increase preparedness for such events, from the perspectives of future health-care professionals, as well as personnel in various emergency teams taking part in MCI response., Methods: All participants in a 2-day, full-scale MCI exercise ( N = 206) were invited to participate in an investigator-developed survey., Results: In total, 124 participants (60.2%) responded to the questionnaire. Most of the respondents were satisfied with the information and frames of the full-scale MCI exercise. Based on their experiences, over half of the respondents perceived that the county ambulance, police, and fire departments were well prepared in case of an MCI in the future. Reported areas of improvement were specifically related to communication lines and triage., Conclusion: Weakness in communication lines and triage were assumed a threat to effective handling of MCIs. However, further studies are needed to decide the content needed in MCI exercises to effectively increase regional preparedness for such events.

Background: Terrorist attacks have the potential to be mass casualty events, causing multiple injuries and deaths. High injury rate attacks will particularly place a high burden on emergency medical systems. This study aimed to assess if there is a difference between attacks with high injury rates and high fatality rates., Methods: The top 100 terrorist events causing the highest number of fatalities versus the highest number of injuries were selected from the Global Terrorism Database. Analyses were performed on temporal factors, location, target type, attack and weapon type, and perpetrator type., Results: The 9/11 attacks caused the highest number of both fatalities and injuries. With regards to injury rates, the sarin attacks in Tokyo, Japan ranked second. Events with high fatality rates were overrepresented in Sub-Saharan Africa, whereas events with high injury rates were predominant in the Middle East & North Africa. High fatality rates were most often associated with armed assaults and hostage takings. Bombings were responsible for the highest number of injuries. CBRN attacks were overrepresented in the top 100 injuries, and accounted for 11% of the incidents., Conclusion: High injury rate incidents place a heavy burden on the health care system as the number of injuries is nearly ten times as high as the number of injuries in high fatality rate incidents. Epidemiological analysis of high impact terrorist events may contribute to counter-terrorism preparedness, to an increased focus on dealing with CBRN-events, and thus to a proper medical response to future terrorist events.

Objectives: Belgium is not only prone to inland terrorism but also attracts terrorist factions aiming at various political, diplomatic, military, and/or religious targets. This study aimed to identify and characterize all documented terrorist attacks in Belgium reported to the Global Terrorism Database (GTD) over a period of 50 years., Methods: The GTD was searched for all terrorist attacks in Belgium between 1970 and 2019. Analyses were performed on temporal factors, location, target type, attack and weapon type, attacker type, and number of casualties or hostages., Results: In 50 years, 121 incidents accounted for 80 confirmed fatalities and 498 injured people. Bombings and explosions were the most frequently identified attack type (46.3%), followed by assassination (16.5%), infrastructure damage (15.7%) and armed or unarmed assaults (14.0%). Governmental and diplomatic institutions were the most frequent target (24.0%). For those perpetrators the GTD did have enough information we saw a timely change from far left and separatist dominating the early decades to Jihadi groups in the last decade, while anti-semitic factions were active in every decade., Conclusion: In contrast to other studies, this study did not show an increase over time. Left-wing perpetrators dominated the eighties. In 50 years of terrorist activity in Belgium, the health care system was spared. Devastating mass casualty attacks challenging the health care system are rare in Belgium.

Background: Assault weapon and large-capacity magazine bans are potential tools for policy makers to prevent public mass shootings. However, the efficacy of these bans is a continual source of debate. In an earlier study, we estimated the impact of the Federal Assault Weapons Ban (FAWB) on the number of public mass shooting events in the United States. This study provides an updated assessment with 3 additional years of firearm surveillance data to characterize the longer-term effects., Objective: This study aims to estimate the impact of the FAWB on trends in public mass shootings from 1966 to 2022., Methods: We used linear regression to estimate the impact of the FAWB on the 4-year simple moving average of annual public mass shootings, defined by events with 4 or more deaths in 24 hours, not including the perpetrator. The study period spans 1966 to 2022. The model includes indicator variables for both the FAWB period (1995-2004) and the period after its removal (2005-2022). These indicators were interacted with a linear time trend. Estimates were controlled for the national homicide rate. After estimation, the model provided counterfactual estimates of public mass shootings if the FAWB was never imposed and if the FAWB remained in place., Results: The overall upward trajectory in the number of public mass shootings substantially fell while the FAWB was in place. These trends are specific to events in which the perpetrator used an assault weapon or large-capacity magazine. Point estimates suggest the FAWB prevented up to 5 public mass shootings while the ban was active. A continuation of the FAWB and large-capacity magazine ban would have prevented up to 38 public mass shootings, but the CIs become wider as time moves further away from the period of the FAWB., Conclusions: The FAWB, which included a ban on large-capacity magazines, was associated with fewer public mass shooting events, fatalities, and nonfatal gun injuries. Gun control legislation is an important public health tool in the prevention of public mass shootings., (© Alex Lars Lundberg, James Alan Fox, Hassan Mohammad, Maryann Mason, Doreen Salina, David Victorson, Ruben Parra-Cardona, Lori Ann Post. Originally published in JMIR Public Health and Surveillance (https://publichealth.jmir.org).)

Objective: Mass Casualty Incidents (MCIs) involving high-speed passenger ferries (HSPFs) may result in the dual-wave phenomenon, in which the emergency department (ED) is overwhelmed by an initial wave of minor injuries, followed by a second wave of more seriously injured victims. This study aimed to characterize the time pattern of ED presentation of victims in such accidents in Hong Kong., Methods: All HSPF MCIs from 2005 to 2015 were reviewed retrospectively, with the time interval from accident to ED registration determined for each victim. Multivariable linear regression was used to identify independent factors associated with the time of ED presentation after the accidents., Results: Eight MCIs involving 492 victims were identified. Victims with an Injury Severity Score (ISS) ≥ 9 had a significantly shorter median time interval compared to those with minor injuries. An ISS ≥ 9 and evacuation by emergency service vessels were associated with a shorter delay in ED arrival, whereas ship sinking, accident at nighttime, and a longer linear distance between the accident and receiving ED were associated with a longer delay., Conclusion: The dual-wave phenomenon was not present in HSPF MCIs. Early communication is the key to ensure early resource mobilisation and a well-timed response.

The recent rise of active shootings calls for adequate preparation. Currently, the "Run, Hide, Fight" concept is widely accepted and adopted by many hospitals nationwide. Unfortunately, the appropriateness of this concept in hospitals is uncertain due to lack of data. To understand the "Run, Hide, Fight" concept application in hospitals, a review of currently available data is needed. A systematic review was done focusing on the "Run, Hide, Fight" concept using multiple databases from the past 12 years. The PRISMA flow diagram was used to systematically select the articles based on specific inclusion and exclusion criteria. The measurements were subjective evaluations and survival probabilities post-concept. One agent-based modeling study suggested a high survival probability in non-medical settings. However, there is a paucity of data supporting its effectiveness and applicability in hospitals. Literature suggests a better suitable concept, the "Secure, Preserve, Fight" concept, as a response protocol to active shootings in hospitals. The effectiveness of the "Run, Hide, Fight" concept in hospitals is questionable. The "Secure, Preserve, Fight" concept was found to be designed more specifically for hospitals and closes the gaps on the flaws in the "Run, Hide, Fight" concept.

On October 7, 2023, a war erupted in Israel following a mass terror attack including mass shootings, violent events, civilian abductions, and numerous fatalities, ranking as the third most deadliest terror attack. This cross-sectional, population-based study evaluated the impact on the mental health and utilization of mental health services in the Arab and Jewish populations. Conducted through a virtual platform, the study compared demographic factors, exposure to war-related events, anxiety, and post-traumatic stress symptoms among 517 participants in a representative sample of the adult population in Israel (79.1% Jewish, 20.9% Arab). Jews reported higher exposure to war-related events, but a majority expressed a lack of interest in mental help. In contrast, more Arabs desired mental help but faced barriers like stigma and scarce resources. Arabs showed a greater preference for group therapy and medical treatment. Trust in official bodies was consistently higher among Jews. Both populations exhibited similar levels (12-15.4%) of probable post-traumatic stress disorder (PTSD). This study equips clinicians, researchers and policymakers with real-time insights into improving mental health support for the culturally diverse needs of Jewish and Arab communities following exposure to mass trauma., Competing Interests: Declaration of competing interest The authors have no conflicts of interest to declare., (Copyright © 2024 Elsevier B.V. All rights reserved.)

Introduction: Despite the significant need for mechanical ventilation in- and out-of-hospital, mechanical ventilators remain inaccessible in many instances because of cost or size constraints. Mechanical ventilation is especially critical in trauma scenarios, but the impractical size and weight of standard mechanical ventilators restrict first responders from carrying them in medical aid bags, leading to reliance on imprecise manual bag-mask ventilation. This is particularly important in combat-related injury, where airway compromise and respiratory failure are leading causes of preventable death, but medics are left without necessary mechanical ventilation. To address the serious gaps in mechanical ventilation accessibility, we are developing an Autonomous, Modular, and Portable Ventilation platform (AMP-Vent) suitable for austere environments, prolonged critical care, surgical applications, mass casualty incidents, and stockpiling. The core system is remarkably compact, weighing <2.3 kg, and can fit inside a shoebox (23.4 cm × 17.8 cm × 10.7 cm). Notably, this device is 65% lighter than standard transport ventilators and astoundingly 96% lighter than typical intensive care unit ventilators. Beyond its exceptional portability, AMP-Vent can be manufactured at less than one-tenth the cost of conventional ventilators. Despite its reduced size and cost, the system's functionality is uncompromised. The core system is equipped with closed-loop sensors and advanced modes of ventilation (pressure-control, volume-control, and synchronized intermittent mandatory ventilation), enabling quality care in a portable form factor. The current prototype has undergone preliminary preclinical testing and optimization through trials using a breathing simulator (ASL 5000) and in a large animal model (swine). This report aims to introduce a novel ventilation system and substantiate its promising performance through evidence gathered from preclinical studies., Materials and Methods: Lung simulator testing was performed using the ASL 5000, in accordance with table 201.105 "pressure-control inflation-type testing" from ISO 80601-2-12:2020. Following simulations, AMP-Vent was tested in healthy 10-kg female domestic piglets. The Children's Hospital of Philadelphia Institutional Animal Care and Use Committee approved all animal procedures. Swine received 4-min blocks of alternating ventilation, where AMP-Vent and a conventional anesthesia ventilator (GE AISYS CS2) were used to titrate to varied end-tidal carbon dioxide (EtCO2) goals with the initial ventilator switching for each ascending target (35, 40, 45, 50, 55 mmHg)., Results: During ASL 5000 simulations, AMP-Vent exhibited consistent performance under varied conditions, maintaining a coefficient of variation of 2% or less within each test. In a large animal study, AMP-Vent maintained EtCO2 and SpO2 targets with comparable performance to a conventional anesthesia ventilator (GE AISYS CS2). Furthermore, the comparison of minute ventilation (Ve) distributions between the conventional anesthesia ventilator and AMP-Vent at several EtCO2 goals (35, 40, 45, 50, and 55 mmHg) revealed no statistically significant differences (p = 0.46 using the Kruskal-Wallis rank sum test)., Conclusions: Preclinical results from this study highlight AMP-Vent's core functionality and consistent performance across varied scenarios. AMP-Vent sets a benchmark for portability with its remarkably compact design, positioning it to revolutionize trauma care in previously inaccessible medical scenarios., (© The Association of Military Surgeons of the United States 2024. All rights reserved. For commercial re-use, please contact reprints@oup.com for reprints and translation rights for reprints. All other permissions can be obtained through our RightsLink service via the Permissions link on the article page on our site–for further information please contact journals.permissions@oup.com.)

Mass violence events, especially in healthcare settings, have devastating consequences and long-lasting effects on the victims and the community. The rate of violent events in Mexico, especially in hospital settings, has increased since 2006, but has become more evident in 2018. Guanajuato State, located in central Mexico, is among the states most affected by the wave of violence, especially active shooter events. The year 2019 had the highest number of incidents. Therefore, the Silver Code and the components of Safe Hospitals, in accordance with the Hartford consensus and PAHO guidelines, were implemented in the hospitals of the Institute of Public Health of the State of Guanajuato, with a focus on the actions of healthcare personnel to prevent collateral damage. Although subsequently there were still fatalities and injuries in the events involving active shooters in the hospitals, there were no casualties among healthcare personnel, according to data from the Institute of Public Health, Guanajuato State. This paper presents information from the data from General Directorate of Epidemiology to describe the hospital mass violence situation in the State of Guanajuato, Mexico and recounts the step taken to effectively manage and prevent these situations moving forward. Specific recommendations based on international consensus and our experience provided include increasing the level of security checks for people entering the hospital premises, training healthcare personnel on violence-related preparedness and improving management of active shooter events consistent with published evidence, to reduce the possibility of casualties., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2024. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)

This paper describes the range of Defence Engagement (Health) (DE(H)) activities between Northern Ireland and Ireland following the Good Friday Agreement in April 1998. Although the Agreement made provision for cross-border cooperation in health, the Omagh bombing of August 1998 energised the discussion to provide greater co-ordination of future responses to mass casualty events. The paper describes these DE(H) activities at the Strategic, Operational and Tactical levels to show the integration across these levels and between the agencies of both governments. The paper shows how a DE(H) programme can have a successful strategic effect by finding topics of mutual interest that can bring together two countries in order to provide an effective health and social care provision. This paper forms part of a special issue of BMJ Military Health dedicated to Defence Engagement (., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2024. No commercial re-use. See rights and permissions. Published by BMJ.)

This in-depth review delves into the multifaceted realm of mass shootings and explores their epidemiology from a psychological perspective. The article presents a comprehensive examination of the prevalence, perpetrator and victim profiles, motives, and contributing factors associated with mass shootings. By investigating the intricate relationship between masculinity, domestic violence, military service, social media, fame-seeking, suicidal ideation, mental illness, and firearms, this article sheds light on the multifaceted nature of mass shootings. Moreover, it discusses the importance of implementing effective prevention strategies to address this growing public health concern. The findings from this review serve as a valuable resource for researchers, practitioners, policy makers, and the community at large, facilitating a deeper understanding of mass shootings and fostering the development of evidence-based solutions to prevent these tragic incidents.

Importance: Mass violence incidents (MVIs) are prevalent in the US and can have profound and long-lasting psychological consequences on direct survivors, but their outcomes among the broader communities where the MVI occurred are unknown., Objective: To investigate the prevalence of and factors associated with past-year and current posttraumatic stress disorder (PTSD) among adults in communities that experienced an MVI., Design, Setting, and Participants: This cross-sectional survey was completed between February and September 2020 with a household probability sample of adults from 6 communities that had experienced an MVI between 2015 and 2019: Dayton, Ohio; El Paso, Texas; Parkland, Florida; Pittsburgh, Pennsylvania; San Bernadino, California; and Virginia Beach, Virginia. Address-based sampling was used to identify randomly selected households, mail invitations, and select 1 adult per household to complete a self-administered paper or online survey. Data analysis was performed from September to November 2023., Main Outcomes and Measures: The primary outcome was presumptive diagnostic-level past-year PTSD and current (past month) PTSD determined using American Psychiatric Association Diagnostic and Statistical Manual of Mental Disorders (Fifth Edition) (DSM-5) PTSD criteria., Results: A total of 6867 adults aged 18 years or older accessed the website with a description of the study and consent materials. Of these, 5991 (87.2%) agreed to participate and completed the survey, 343 (6.3%) partially completed the survey, and 443 (6.5%) did not meet eligibility criteria or refused to participate. Most of the 5991 respondents were female (3825 individuals [53.5%]) and had a mean (SD) age of 45.56 (17.58) years. A total of 1261 of 5931 individuals (21.0%) reported high exposure to the MVI (either they or a close friend and/or family member was on site during the shooting). Nearly one-quarter (23.7%; 1417 of 5977 participants reporting PTSD) met presumptive DSM-5 diagnostic criteria for past-year PTSD, with 8.9% (530 participants) meeting the criteria for current PTSD. Regression analyses found that being female (odds ratio, 2.32; 95% CI, 2.01-2.68) and having a history of both physical or sexual assault and other potentially traumatic events (odds ratio, 9.68; 95% CI, 7.48-12.52) were associated with the greatest risk of past-year PTSD., Conclusions and Relevance: In this survey study of 5991 participants, presumptive PTSD was quite prevalent long after the MVI among adults in communities that have experienced an MVI, suggesting that MVIs have persistent and pervasive public health impacts on communities, particularly among those with prior exposure to physical or sexual assault and other potentially traumatic events. Focusing exclusively on direct exposure to MVIs is not sufficient. Incorporating these findings into screening should improve efforts to identify the individuals most in need of prevention or mental health service after MVIs.

Objectives: Mass violence incidents (MVIs) involving firearms, commonly referred to as "mass shootings" have become increasingly frequent in the United States. These shootings often result in immediate casualties and have far-reaching psychological impacts on survivors, witnesses, and the broader community. This study aimed to assess the prevalence and risk factors of depression within affected communities., Study Design: Population-based cross-sectional study., Methods: Data were collected from six communities affected by MVIs involving firearms that occurred between 2015 and 2020. Participants were randomly selected through address-based sampling, and depression was assessed using Diagnostic and Statistical Manual of Mental Disorders (Fifth Edition) diagnostic-level major depressive episode (MDE)., Results: Overall, the MDE prevalence was 17·2% since the MVI, 15·4% in the past year, and 8·2% in the past month. Significant risk factors for MDE since MVIs include high exposure to the incident (adjusted relative risk [aRR] = 1·32, 95% confidence interval [CI]: 19-1·60), being aged 18-29 years (aRR = 2·52, 95% CI: 1·61-3·95), being a woman (aRR = 1·58, 95% CI: 1·27-1·96), having low social support (aRR = 1·80, 95% CI: 1·46-2·22), and experiencing past sexual or physical trauma (aRR = 2·20, 1·52-3·19)., Conclusion: Our study reveals a high burden of depression within communities affected by MVIs involving firearm use. Persons with high exposure to the MVIs and certain demographic groups had greater risks for MDE. These findings highlight the long-term mental health burden in communities affected by MVIs and underscore the necessity of providing mental health services in its aftermath., (Copyright © 2024 The Authors. Published by Elsevier Ltd.. All rights reserved.)

Mass shootings (incidents with four or more people shot in a single event, not including the shooter) are becoming more frequent in the United States, posing a significant threat to public health and safety in the country. In the current study, we intended to analyze the impact of state-level prevalence of gun ownership on mass shootings-both the frequency and severity of these events. We applied the negative binomial generalized linear mixed model to investigate the association between gun ownership rate, as measured by a proxy (i.e., the proportion of suicides committed with firearms to total suicides), and population-adjusted rates of mass shooting incidents and fatalities at the state level from 2013 to 2022. Gun ownership was found to be significantly associated with the rate of mass shooting fatalities. Specifically, our model indicated that for every 1-SD increase-that is, for every 12.5% increase-in gun ownership, the rate of mass shooting fatalities increased by 34% (p value < 0.001). However, no significant association was found between gun ownership and rate of mass shooting incidents. These findings suggest that restricting gun ownership (and therefore reducing availability to guns) may not decrease the number of mass shooting events, but it may save lives when these events occur., (© 2024. The Author(s).)

Introduction: The United States has one of the highest rates of gun violence and mass shootings. Timely medical attention in such events is critical. The objective of this study was to assess geographic disparities in mass shootings and access to trauma centers., Methods: Data for all Level I and II trauma centers were extracted from the American College of Surgeons and the Trauma Center Association of America registries. Mass shooting event data (4+ individuals shot at a single event) were taken from the Gun Violence Archive between 2014 and 2018., Results: A total of 564 trauma centers and 1672 mass shootings were included. Ratios of the number of mass shootings vs trauma centers per state ranged from 0 to 11.0 mass shootings per trauma center. States with the greatest disparity (highest ratio) included Louisiana and New Mexico., Conclusion: States in the southern regions of the US experience the greatest disparity due to a high burden of mass shootings with less access to trauma centers. Interventions are needed to increase access to trauma care and reduce mass shootings in these medically underserved areas., Competing Interests: Declaration of Conflicting InterestsThe author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

Terrorist attacks involving children raised concern regarding the preparedness to treat pediatric trauma patients during mass casualty incidents (MCIs). The purpose of this project was to assess the resources available in Milan to respond to MCIs as the 2016 Bastille Day attack in Nice. Literature and guidelines were reviewed and minimal standard requirements of care of pediatric trauma patients in MCIs were identified. The hospitals that took part in the study were asked to answer a survey regarding their resource availability. An overall surge capability of 40-44 pediatric trauma patients was identified, distributed based on age and severity, hospital resources, and expertise. The findings showed that adult and pediatric hospitals should work in synergy with pediatric trauma centers, or offer an alternative if there is none, and should be included in disaster plans for MCIs. Simulations exercises need to be carried out to evaluate and validate the results.

BACKGROUND Mass burn casualties impose an enormous burden on triage systems. The triage capacity of the Braden Scale for detecting injury severity has not been evaluated in mass burn casualties. MATERIAL AND METHODS The New Injury Severity Score (NISS) was used to dichotomize the injury severity of patients. The Braden Scale and other potentially indicative measurement tools were evaluated using univariate analysis and multivariate logistic regression. The relationships between the Braden Scale and other continuous variables with injury severity were further explored by correlation analysis and fitted with regression models. Receiver operating characteristic (ROC) curve analysis was used to validate triage capacity and compare prognostic accuracy. RESULTS A total of 160 hospitalized patients were included in our study; 37 were severely injured, and 123 were not. Injury severity was independently associated with the Numerical Rating Scale (adjusted OR, 1.816; 95% CI, 1.035-3.187) and Braden Scale (adjusted OR, 0.693; 95% CI, 0.564-0.851). The ROC curve of the fitted quadratic model of the Braden Scale was 0.896 (0.840-0.953), and the cut-off value was 17. The sensitivity was 81.08% (64.29-91.44%) and the specificity was 82.93% (74.85-88.89%). Comparison of ROC curves demonstrated an infinitesimal difference between the Braden Scale and NISS for predicting 30-day hospital discharge (Z=0.291, P=0.771) and Intensive Care Unit admission (Z=2.016, P=0.044). CONCLUSIONS The Braden Scale is a suitable triage tool for predicting injury severity and forecasting disability-related outcomes in patients affected by mass burn casualty incidents.

Ninety-six people died following a crowd crush at the Hillsborough Football Stadium, Sheffield, UK in 1989. The cause of death in nearly all cases was compression asphyxia. The clinical and pathological features of deaths encountered in crowds are discussed with a particular focus on the Hillsborough disaster., Competing Interests: Competing interests: All authors received payment for their contributions as expert witnesses for the 2014–2016 Hillsborough Inquests., (© Author(s) (or their employer(s)) 2021. No commercial re-use. See rights and permissions. Published by BMJ.)

Introduction: System learning from major incidents is a crucial element of improving preparedness for response to any future incidents. Sharing good practice and limitations stimulates further actions to improve preparedness and prevents duplicating mistakes., Methods: This convergent parallel mixed methods study comprises data from responses to an online survey and individual interviews with healthcare staff who took part in the responses to three terrorist incidents in the UK in 2017 (Westminster Bridge attack, Manchester Arena Bombing and London Bridge attack) to understand limitations in the response and share good practices., Results: The dedication of NHS staff, staff availability and effective team work were the most frequently mentioned enabling factors in the response. Effective coordination between teams and a functional major incident plan facilitated an effective response. Rapid access to blood products, by positioning the blood bank in the ED, treating children and parents together and sharing resources between trauma centres were recognised as very effective innovative practices. Recent health emergency preparedness exercises (HEPEs) were valued for preparing both Trusts and individual staff for the response. Challenges included communication between ambulance services and hospitals, difficulties with patient identification and tracking and managing the return to 'normal' work patterns post event. Lack of immediately available clinical protocols to deal with blast injuries was the most commonly mentioned clinical issue. The need for psychosocial support for responding and supporting staff was identified., Discussion: Between-agencies communication and information sharing appear as the most common recurring problems in mass casualty incidents (MCIs). Recent HEPEs, which allowed teams, interdisciplinary groups, and different agencies to practice responding to similar simulated incidents, were important and informed actions during the real response. Immediate and delayed psychosocial support should be in place for healthcare staff responding to MCIs., Competing Interests: Competing interests: ES, NB, RA and PR were employed by Public Health England’s Emergency Response Department when the emergency preparedness exercises were delivered. However, they were not part of the exercise delivery teams., (© Author(s) (or their employer(s)) 2021. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)

Objectives: A major incident is any emergency requiring special arrangements by the emergency services. All hospitals are required by law to keep a major incident plan (MIP) detailing the response to such events. In 2006 and 2019, we assessed the preparedness and knowledge of key individuals in hospitals across England and found a substantial gap in responding to the MIP. In this report, we compare responses from doctors at major trauma centres (MTCs) and other hospitals (non-MTCs)., Methods: We identified trusts in England that received over 30 000 patients through the ED in the fourth quarter of 2016/2017. We contacted the on-call anaesthetic, emergency, general surgery and trauma and orthopaedic registrar at each location and asked three questions assessing their confidence in using their hospital's MIP: (1) Have you read your hospital's MIP? (2) Do you know where you can access your hospital's MIP guidelines? (3) Do you know what role you would play if an MIP came into effect while you are on call?We compared data from MTCs and non-MTCs using multinomial mixed proportional odds models., Results: There was a modest difference between responses from individuals at MTCs and non-MTCs for question 2 (OR=2.43, CI=1.03 to 5.73, p=0.04) but no evidence of a difference between question 1 (OR=1.41, CI=0.55 to 3.63, p=0.47) and question 3 (OR=1.78, CI=0.86 to 3.69, p=0.12). Emergency medicine and anaesthetic registrars showed significantly higher preparedness and knowledge across all domains. No evidence of a systematic difference in specialty response by MTC or otherwise was identified., Conclusions: Confidence in using MIPs among specialty registrars in England remains low. Doctors at MTCs tended to be better prepared and more knowledgeable, but this effect was only marginally significant. We make several recommendations to improve education on major incidents., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2021. No commercial re-use. See rights and permissions. Published by BMJ.)

Background: Public mass shootings are a significant public health problem that require ongoing systematic surveillance to test and inform policies that combat gun injuries. Although there is widespread agreement that something needs to be done to stop public mass shootings, opinions on exactly which policies that entails vary, such as the prohibition of assault weapons and large-capacity magazines., Objective: The aim of this study was to determine if the Federal Assault Weapons Ban (FAWB) (1994-2004) reduced the number of public mass shootings while it was in place., Methods: We extracted public mass shooting surveillance data from the Violence Project that matched our inclusion criteria of 4 or more fatalities in a public space during a single event. We performed regression discontinuity analysis, taking advantage of the imposition of the FAWB, which included a prohibition on large-capacity magazines in addition to assault weapons. We estimated a regression model of the 5-year moving average number of public mass shootings per year for the period of 1966 to 2019 controlling for population growth and homicides in general, introduced regression discontinuities in the intercept and a time trend for years coincident with the federal legislation (ie, 1994-2004), and also allowed for a differential effect of the homicide rate during this period. We introduced a second set of trend and intercept discontinuities for post-FAWB years to capture the effects of termination of the policy. We used the regression results to predict what would have happened from 1995 to 2019 had there been no FAWB and also to project what would have happened from 2005 onward had it remained in place., Results: The FAWB resulted in a significant decrease in public mass shootings, number of gun deaths, and number of gun injuries. We estimate that the FAWB prevented 11 public mass shootings during the decade the ban was in place. A continuation of the FAWB would have prevented 30 public mass shootings that killed 339 people and injured an additional 1139 people., Conclusions: This study demonstrates the utility of public health surveillance on gun violence. Surveillance informs policy on whether a ban on assault weapons and large-capacity magazines reduces public mass shootings. As society searches for effective policies to prevent the next mass shooting, we must consider the overwhelming evidence that bans on assault weapons and/or large-capacity magazines work., (©Lori Post, Maryann Mason, Lauren Nadya Singh, Nicholas P Wleklinski, Charles B Moss, Hassan Mohammad, Tariq Z Issa, Adesuwa I Akhetuamhen, Cynthia A Brandt, Sarah B Welch, James Francis Oehmke. Originally published in JMIR Public Health and Surveillance (https://publichealth.jmir.org), 22.04.2021.)

Background: Acute or chronic stress can lead to physical and mental disorders. Measuring cortisol can objectify the degree of stress. Cortisol is traditionally measured in serum, but recently the relevant fraction of free cortisol can be reliably measured in saliva, using the very sensitive liquid chromatography tandem mass spectrometry (LC-MS/MS) method. The use of saliva is non-invasive and allows easy serial testing around stressful events. The main objective of this study is to investigate whether serial saliva cortisol determinations using the LC-MS/MS method can be used to assess the stress response that first responders may experience during moments of acute professional deployment in their daily work., Methods: Healthy first responders (police officers, firefighters, rapid response team, ambulance personnel, first aid and emergency medical personnel) were recruited to participate in a Euregional high-reliability simulation training ('Be Aware'-scenario training, 19 April 2018). At three time points, simultaneous venous blood samples and saliva samples were obtained. These time points were 1 hour before, immediately after and 10 hours after the simulation training. The correlation between changes in saliva cortisol measured by LC-MS/MS and serum cortisol at all three time points was determined. Results were compared with spectators not directly participating in the simulation., Results: 70 subjects participated in the simulation. There was a strong correlation between the changes in saliva and blood cortisol at the three time points. A significant increase in blood and saliva cortisol was shown 1 hour after the experienced stress moments. The levels had almost completely returned to baseline in all healthy volunteers 10 hours later. Cortisol in spectators was unaffected., Conclusion: Serial saliva cortisol measurements using LC-MS/MS is a reliable and fast non-invasive functional stress assay, which can be easily collected in daily practice and used for investigation and monitoring of stress response in front line responders., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2021. No commercial re-use. See rights and permissions. Published by BMJ.)

Background: Firearm injury remains a public health crisis. Whereas there have been studies evaluating causes of death in victims of civilian public mass shootings (CPMSs), there are no large studies evaluating injuries sustained and treatments rendered in survivors. The purpose of this study was to describe these characteristics to inform ideal preparation for these events., Methods: A multicenter, retrospective study of CPMS survivors who were treated at designated trauma centers from July 1, 1999 to December 31, 2017, was performed. Prehospital and hospital variables were collected. Data are reported as median (25th percentile, 75th percentile interquartile range), and statistical analyses were carried out using Mann-Whitney U, χ2, and Kruskal-Wallis tests. Patients who died before discharge from the hospital were excluded., Results: Thirty-one events involving 191 patients were studied. The median number of patients seen per event was 20 (5, 106), distance to each hospital was 6 (6, 10) miles, time to arrival was 56 (37, 90) minutes, number of wounds per patient was 1 (1, 2), and Injury Severity Score was 5 (1, 17). The most common injuries were extremity fracture (37%) and lung parenchyma (14%). Twenty-nine percent of patients did not receive paramedic-level prehospital treatment. Following arrival to the hospital, 27% were discharged from the emergency department, 32% were taken directly to the operating room/interventional radiology, 16% were admitted to the intensive care unit, and 25% were admitted to the ward. Forty percent did not require advanced treatment within 12 hours. The most common operations performed within 12 hours of arrival were orthopedic (15%) and laparotomy (15%). The most common specialties consulted were orthopedics (38%) and mental health (17%)., Conclusion: Few CPMS survivors are critically injured. There is significant delay between shooting and transport. Revised triage criteria and a focus on rapid transport of the few severely injured patients are needed., Level of Evidence: Therapeutic/care management, level IV., (Copyright © 2021 Wolters Kluwer Health, Inc. All rights reserved.)

Abstract: This article outlines a four-part strategy for future research in mental health and complementary disciplines that will broaden understanding of mass shootings and multi-victim gun homicides. First, researchers must abandon the starting assumption that acts of mass violence are driven primarily by diagnosable psychopathology in isolated "lone wolf" individuals. The destructive motivations must be situated, instead, within larger social structures and cultural scripts. Second, mental health professionals and scholars must carefully scrutinize any apparent correlation of violence with mental illness for evidence of racial bias in the official systems that define, measure, and record psychiatric diagnoses, as well as those that enforce laws and impose criminal justice sanctions. Third, to better understand the role of firearm access in the occurrence and lethality of mass shootings, research should be guided by an overarching framework that incorporates social, cultural, legal, and political, but also psychological, aspects of private gun ownership in the United States. Fourth, effective policies and interventions to reduce the incidence of mass shootings over time-and to prevent serious acts of violence more generally-will require an expanded body of well-funded interdisciplinary research that is informed and implemented through the sustained engagement of researchers with affected communities and other stakeholders in gun violence prevention. Emerging evidence that the coronavirus pandemic has produced a sharp increase both in civilian gun sales and in the social and psychological determinants of injurious behavior adds special urgency to this agenda., (Copyright © 2021 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the President and Fellows of Harvard College.)

Objective: We analyzed characteristics of tornado-related injuries and medical impact on a county-level hospital in China in June 23, 2016. The objective of this study was to describe and analyze local government rescue responses following the tornado., Methods: County hospital medical records of 288 tornado-related injury patients were collected. Descriptive analyses to study injury characteristics and associated risk factors were performed., Results: Of the studied population, 84% of the wounded were older than 45 years. Only 30 (10.4%) people were sent to the hospital for treatment within 3 hours following the disaster. Heavy objects or collapsing houses accounted for 191 (66.3%) of the documented injuries. The proportion of people with resulting brain injuries was 46.2% of the entire injured population, and the incidence of lower extremity injuries was 27.8%. A total of 89.6% of the wounded had skin and soft tissue injuries. Multiple injuries were found in 129 (44.8%) people and 156 had a single injury (54.2%), and 3 cases with acute stress disorder were admitted to the hospital., Conclusions: Preparation plans, including tornado warnings, prevention, and rescue, are a basic requirement for the mitigation of tornado-related injuries. Protection awareness of tornado disasters is also critical to ensure injury prevention.

Despite significant potential for providing insight to private perceptions and behaviors, search engine data has yet to be utilized as a means of gauging the U.S. public's interest and understanding of mental health in the context of gun violence and politics. An analysis of Google Trends revealed that Mental health searches increased in volume starting in the beginning of the current decade. Notably, both "mental health" and "gun(s)" were searched with greater frequency the week after the mass shooting events occurred. Related searches after the event also observed a significant increase in interest in mental health and gun regulation, legal reform, mass shootings, and gun(s). Results suggest that the American public's perception of mental illness increasingly incorporates associations with themes of violence and politics, which becomes more apparent surrounding mass shooting events. Future studies are needed to determine implications for stigmatization of vulnerable groups, and possible relations to media coverage., Competing Interests: The authors have declared that no competing interests exist.

Multiple professional societies, nongovernment and government agencies have studied the science of sudden onset disaster mass casualty incidents to create and promote surge response guidelines. The COVID-19 pandemic has presented the health-care system with challenges that have limited science to guide the staff, stuff, and structure surge response.This study reviewed the available surge science literature specifically to guide an emergency department's surge structural response using a translational science approach to answer the question: How does the concept of sudden onset mass casualty incident surge capability apply to the process to expand COVID-19 pandemic surge structure response?The available surge structural science literature was reviewed to determine the application to a pandemic response. The on-line ahead of print and print COVID-19 scientific publications, as well as gray literature were studied to learn the best available COVID-19 surge structural response science. A checklist was created to guide the emergency department team's COVID-19 surge structural response.

Objective: The study provides a comprehensive insight into how an initial receiving hospital without adequate capacity adapted to coping with a mass casualty incident after the Formosa Fun Coast Dust Explosion (FFCDE)., Methods: Data collection was via in-depth interviews with 11 key participants. This was combined with information from medical records of FFCDE patients and admission logs from the emergency department (ED) to build a detailed timeline of patients flow and ED workload changes. Process tracing analysis focused on how the ED and other units adapted to coping with the difficulties created by the patient surge., Results: The hospital treated 30 victims with 36.3% average total body surface area burn for over 5 hours alongside 35 non-FFCDE patients. Overwhelming demand resulted in the saturation of ED space and intensive care unit beds, exhaustion of critical materials, and near-saturation of clinicians. The hospital reconfigured human and physical resources differently from conventional drills. Graphical timelines illustrate anticipatory or reactive adaptations. The hospital's ability to adapt was based on anticipation during uncertainty and coordination across roles and units to keep pace with varying demands., Conclusion: Adapting to beyond-surge capacity incident is essential to effective disaster response. Building organizational support for effective adaptation is critical for disaster planning.

Objective: Mis-triage may have serious consequences for patients in mass casualty incidents (MCI) at sea. The purpose of this study was to assess outcome, reliability and validity of an analogue and a digital recording system for triage of a MCI at sea., Methods: The study based on a triage exercise conducted with a cross-over-design. Forty-eight volunteers were presented a fictional MCI with 50 cases. The volunteers were randomly assigned to start with the analogue (Group A, starting with the analogue followed by the digital system) or digital system (Group B, starting with the digital followed by the analogue system). Triage score distribution and agreement between the triage methods and a predefined standard were reported. Reliability was analysed using Cronbach's Alpha and Cohen's Kappa. Validity was measured through sensitivity, specificity and predictive value. Treatment, period and carry-over-effects were analysed using a linear mixed-effects model., Results: The number of patients triaged (total: n = 3545) with the analogue system (n = 1914; 79.75%) was significantly higher (p = 0.001) than with the digital system (n = 1631; 67.96%). A trend towards a higher percentage of correct triages with the digital system was observed (p = 0.282). Ratio of under-triage was significantly smaller with the digital system (p = 0.001). Validity measured with Cronbach's Alpha and Cohen's Kappa was higher with the digital system. So was sensitivity (category; green: 80.67%, yellow: 73.24%, red: 83.54%; analogue: green: 93.28%, yellow: 82.36%, red: 94.04%) and specificity of the digital system (green: 78.07%, yellow: 63.75%, red: 66.25%; analogue: green: 85.50%, yellow: 79.88%, red: 91.50%). Comparing the predictive values and accuracy, the digital system showed higher scores than the analogue system. No significant patterns of carry-over-effects were observed., Conclusions: Significant differences were found for the number of triages comparing the analogue and digital recording system. The digital system has a slightly higher reliability and validity than the analogue triage system., Competing Interests: The authors have declared that no competing interests exist.

On March 11, 2020, the World Health Organization declared a coronavirus disease 2019 (COVID-19) pandemic. Health care systems worldwide should be prepared for an unusually high volume of patients in the next few weeks to months. Even the most efficient radiology department will undergo tremendous stress when victims of a mass casualty flood the emergency department and in turn the radiology department. A significant increase is expected in the number of imaging studies ordered for the initial diagnosis and treatment follow-up of cases of COVID-19. Here, we highlight recommendations for developing and implementing a mass casualty incident (MCI) plan for a viral outbreak, such as the current COVID-19 infection. The MCI plan consists of several steps, including preparation, mobilization of resources, imaging chain, adjusting imaging protocols, and education, such as MCI plan simulation and in-service training. Having an MCI plan in place for a viral outbreak will protect patients and staff and ultimately decrease virus transmission. The use of simulations will help identify throughput and logistical issues., (Copyright © 2020 American College of Radiology. Published by Elsevier Inc. All rights reserved.)

Background: Arbaeenia is the largest religious mass gathering in Iraq. The conditions associated with mass gatherings result in high rates of injury. There have been no prior studies on injuries during the Arbaeenia mass gathering., Objective: This study describes the injuries observed during the Arbaeenia mass gathering in Babel Governorate in Iraq between November 24 and December 14, 2014., Methods: The study was conducted in Babel Governorate at the emergency departments of six public hospitals and two major temporary medical units that were located along the three roads connecting the Middle and Southern Iraqi governorates. We used the Iraq Injury Surveillance System modified form to collect information on injured patients treated in the selected facilities. Data on fatal injuries was obtained from the coroner's office. The following data were collected from the patients: demographics, outcome of injury, place and time of occurrence, mode of evacuation and medical care before arriving at the hospital, duration of travel from place of occurrence to hospital, disposition of non-fatal injury, cause and mode of injury, and whether the injury occurred in connection with the Arbaeenia mass gathering., Results: Information was collected on 1564 injury cases, of which 73 were fatal. About half of the reported nonfatal injuries, 687/1404 (48.9%), and a quarter of fatalities, 18/73 (25%) were related to the Arbaeenia mass gathering (P<.001). Most of the reported injuries were unintentional, 1341/1404 (95.51%), occurred on the street, 864/1323 (65.6%), occurred during the daytime 1103/1174 (93.95 %). Most of those injured were evacuated by means other than ambulance 1107/1206 (91.79%) and did not receive pre-hospital medical care 788/1163 (67.7%). Minor injuries 400/1546 (25.9%) and traffic accidents 394/1546 (25.5%) were the most common types of injuries, followed by falls 270/1546 (17.5%). Among fatal injuries, traffic accidents 38/73 (52%) and violence 18/73 (25%) were the leading causes of death. Mass gathering injuries were more likely to occur among individuals aged 21-40 years (odds ratio [OR] 3.5; 95% CI 2.7-4.5) and >41 years (OR 7.6; 95% CI 5.4-10.6) versus those <21 years; more likely to be unintentional than assault (OR 5.3; 95% CI 1.8-15.5); more likely to happen on the street versus at home (OR 37.7; 95% CI 22.4-63.6); less likely to happen at night than during the day (OR 0.2; 95% CI 0.1-0.4); and less likely to result in hospital admission (OR 0.5; 95% CI 0.3-0.7)., Conclusions: The study shows that most injuries were minor, unintentional, and nonfatal, and most people with injuries had limited access to ambulance transportation and did not require hospitalization., (©Abdulaal Chitheer, Faris Lami, Ahmed Radhi, Ali Arbaji. Originally published in JMIR Public Health and Surveillance (http://publichealth.jmir.org), 28.05.2020.)

Introduction: The Sort, Access, Life-saving interventions, Treatment and/or Triage (SALT) mass-casualty incident (MCI) algorithm is unique in that it includes two subjective questions during the triage process: "Is the victim likely to survive given the resources?" and "Is the injury minor?", Hypothesis/problem: Given this subjectivity, it was hypothesized that as casualties increase, the inter-rater reliability (IRR) of the tool would decline, due to an increase in the number of patients triaged as Minor and Expectant., Methods: A pre-collected dataset of pediatric trauma patients age <14 years from a single Level 1 trauma center was used to generate "patients." Three trained raters triaged each patient using SALT as if they were in each of the following scenarios: 10, 100, and 1,000 victim MCIs. Cohen's kappa test was used to evaluate IRR between the raters in each of the scenarios., Results: A total of 247 patients were available for triage. The kappas were consistently "poor" to "fair:" 0.37 to 0.59 in the 10-victim scenario; 0.13 to 0.36 in the 100-victim scenario; and 0.05 to 0.36 in the 1,000-victim scenario. There was an increasing percentage of subjects triaged Minor as the number of estimated victims increased: 27.8% increase from 10- to 100-victim scenario and 7.0% increase from 100- to 1,000-victim scenario. Expectant triage categorization of patients remained stable as victim numbers increased., Conclusion: Overall, SALT demonstrated poor IRR in this study of increasing casualty counts while triaging pediatric patients. Increased casualty counts in the scenarios did lead to increased Minor but not Expectant categorizations.

Introduction: Triage at mass gatherings in Australia is commonly performed by staff members with first aid training. There have been no evaluations of the performance of first aid staff with respect to diagnostic accuracy or identification of presentations requiring ambulance transport to hospital., Hypothesis: It was hypothesized that triage decisions by first aid staff would be considered correct in at least 61% of presentations., Methods: A retrospective audit of 1,048 presentations to a single supplier of event health care services in Australia was conducted. The presentations were assessed based on the first measured set of physiological parameters, and the primary triage decision was classified as "expected" if the primary and secondary triage classifications were the same or "not expected" if they differed. The performance of the two triage systems was compared using area under the receiver operating characteristic curve (AUROC) analysis., Results: The expected decision was made by first aid staff in 674 (71%) of presentations. Under-triage occurred in 131 (14%) presentations and over-triage in 142 (15%) presentations. The primary triage strategy had an AUROC of 0.7644, while the secondary triage strategy had an AUROC of 0.6280, which was significantly different (P = .0199)., Conclusion: The results support the continued use of first aid trained staff members in triage roles at Australian mass gatherings. Triage tools should be simple, and the addition of physiological variables to improve the sensitivity of triage tools is not recommended because such an approach does not improve the discriminatory capacity of the tools.

Background: Human stampedes (HS) may result in mass casualty incidents (MCI) that arise due to complex interactions between individuals, collective crowd, and space, which have yet to be described from a physics perspective. HS events were analyzed using basic physics principles to better understand the dynamic kinetic variables that give rise to HS., Methods: A literature review was performed of medical and nonmedical sourced databases, Library of Congress databases, and online sources for the term human stampedes resulting in 25,123 references. Filters were applied to exclude nonhuman events. Retrieved references were reviewed for a predefined list of physics terms. Data collection involved recording frequency of each phrase and physics principle to give the final proportions of each predefined principle used a single-entry method for each of the 105 event reports analyzed. Data analysis was performed using the R statistics packages "tidyverse", "psych", "lubridate", and "Hmisc" with descriptive statistics used to describe the frequency of each observed variable., Results: Of the 105 reports of HS resulting in injury or death reviewed, the following frequency of terms were found: density change in a limited capacity, 45%; XY-axis motion failure, 100%; loss of proxemics, 100%; deceleration with average velocity of zero, 90%; Z-axis displacement pathology (falls), 92%; associated structure with nozzle effect, 93%; and matched fluid dynamic of high pressure stagnation of mass gathering, 100%., Conclusions: Description or reference to principles of physics was seen in differing frequency in 105 reports. These include XY-axis motion failure of deceleration that leads to loss of human to human proxemics, and high stagnation pressure resulting in the Z-axis displacement effect (falls) causing injury and death. Real-time video-analysis monitoring of high capacity events or those with known nozzle effects for loss of proxemics and Z-axis displacement pathology offers the opportunity to prevent mortality from human stampedes.

Background: There are no reports comparing wounding pattern in urban and public mass shooting events (CPMS). Because CPMS receive greater media coverage, there is a connation that the nature of wounding is more grave than daily urban gun violence. We hypothesize that the mechanism of death following urban gunshot wounds (GSWs) is the same as has been reported following CPMS., Methods: Autopsy reports of all firearm-related deaths in Washington, DC were reviewed from January 1, 2016, to December 31, 2017. Demographic data, firearm type, number and anatomic location of GSWs, and organ(s) injured were abstracted. The organ injury resulting in death was noted. The results were compared with a previously published study of 19 CPMS events involving 213 victims., Results: One hundred eighty-six urban autopsy reports were reviewed. There were 171 (92%) homicides and 13 (7%) suicides. Handguns were implicated in 180 (97%) events. One hundred eight (59%) gunshots were to the chest/upper back, 85 (46%) to the head, 77 (42%) to an extremity, and 71 (38%) to the abdomen/lower back. The leading mechanisms of death in both urban firearm violence and CPMS were injury to the brain, lung parenchyma, and heart. Fatal brain injury was more common in CPMS events as compared with urban events involving a handgun., Conclusion: There is little difference in wounding pattern between urban and CPMS firearm events. Based on the organs injured, rapid point of wounding care and transport to a trauma center remain the best options for mitigating death following all GSW events., Level of Evidence: Epidemiological, level IV.

Purpose: The purpose of this research was to demonstrate the impact of accounting for age-based radiation response when estimating radiation casualties in a nuclear detonation scenario. Materials and methods: Three nuclear device detonation scenarios were simulated using densely populated regions to compare traditional casualty estimates with age-dependent casualty estimates. Fatalities were estimated using age-based dose-response curves. The surviving population was assumed injured (requiring medical care) if their dose exceeded a lower bound, represented by the minimum dose required to cause deterministic effects, for each age group. Results: In each of the three scenarios, the affected area increased significantly for radiosensitive age groups. In two of the three scenarios, accounting for age-dependent radiosensitivity resulted in up to a 10% increase in fatalities and up to a 12% increase in radiation injuries compared to traditional estimates. This study demonstrates that the differences in casualty estimates are dependent on the relative density and location of radiosensitive populations. Conclusions: These results demonstrate that the inclusion of age-based demographic data and associated dose responses may result in significantly higher estimates of casualties depending on the location and age of the affected population. This information could be useful for the emergency management planning community.

Background: Turkey is an experienced country for both military and civilian mass casualties that arise from explosions and shootings by various terrorist groups. In this study, we aimed to investigate the characteristics of patient flow admitted to our hospital caused by primarily gunshot wounds during the coup attempts on the 15th of July., Methods: This descriptive, retrospective study included a total of 50 patients who were injured during a coup attempt on the date of July 15, 2016, and admitted to our emergency department (ED). Demographic characteristics, anatomical injury sites, postoperative clinical outcomes, and hospitalization settings were recorded. The Glasgow Coma Scale (GCS), Trauma and Injury Severity Score (TRISS), Abbreviated Injury Scale (AIS), Revised Trauma Score (RTS) and Injury Severity Score (ISS) were used to measure the severity of injuries., Results: A total of 63 medical personnel voluntarily reached the ED within two hours. Extremity injuries were the most common injuries. The mean RTS, GCS, and TRISS scores did not differ significantly between the patients discharged from the ED and the patients who were hospitalized (p>0.05). However, there was a statistically significant difference in the ISS scores (p<0.001, independent t-test). There was no statistically significant difference in the GCS and RTS scores between the discharged and hospitalized patients, although the ISS scores were higher in hospitalized patients (p>0.05 and p<0.001, respectively). A total of 33 patients (66%) were admitted to the hospital for follow-up and/or surgical intervention. Five (10%) of the patients were hospitalized for more than 14 days., Conclusion: The management of each disaster is unique. Armed conflicts result in gunshot wounds, and preparations must be focused on surge capacity and a prolonged hospital stay of the patients. In our study, the length of stay in the hospital decreased after the arrival of volunteer staff to the ED, but we should note that the ISS increased. Hospital disaster plans should be reorganized not only for ED but also for the whole hospital.

The toll of civilian deaths in current wars and conflicts has been building for decades. Civilian populations, particularly since WWII, have suffered most of the consequences of armed violence and today represent the most at-risk population. This is attributed to the rise of religious and ethnic hatreds, the collapse of State structures, the battle for control of natural resources, the vast availability of weapons, the proliferation of acts of terrorism, and the spread of so-called asymmetric conflicts. Protections provided to innocent civilians under International Humanitarian Law and the Geneva Conventions have been ignored. This commentary captures the experience of the immediate care and transportation provided to military casualties of the Battle of Solferino in 1859 with civilian casualties recently documented in a Stanford-led study during the "golden hour" after injury in 13 conflicts from 1990 to 2017. Despite many advances in triage and management of war injuries over the intervening decades, the common thread of these 2 scenarios is that transport times and early resuscitation capacity and capabilities, first recognized in the 19th century wars and now accepted as global norms and markers for survival from trauma, are as unavailable today to civilians caught up in war and conflict as they were to soldiers in the 19th century.

Objectives. To evaluate the effect of large-capacity magazine (LCM) bans on the frequency and lethality of high-fatality mass shootings in the United States. Methods. We analyzed state panel data of high-fatality mass shootings from 1990 to 2017. We first assessed the relationship between LCM bans overall, and then federal and state bans separately, on (1) the occurrence of high-fatality mass shootings (logit regression) and (2) the deaths resulting from such incidents (negative binomial analysis). We controlled for 10 independent variables, used state fixed effects with a continuous variable for year, and accounted for clustering. Results. Between 1990 and 2017, there were 69 high-fatality mass shootings. Attacks involving LCMs resulted in a 62% higher mean average death toll. The incidence of high-fatality mass shootings in non-LCM ban states was more than double the rate in LCM ban states; the annual number of deaths was more than 3 times higher. In multivariate analyses, states without an LCM ban experienced significantly more high-fatality mass shootings and a higher death rate from such incidents. Conclusions. LCM bans appear to reduce both the incidence of, and number of people killed in, high-fatality mass shootings.

Identifying the people and places affected by mass shootings depends on how "mass shooting" is defined. From the perspective of urban neighborhoods, it is likely the number of people injured within a proximate time and space, which determines the event's impact on perceptions of safety and social cohesion. We aimed to describe the incidence of "neighborhood" mass shootings in one US city and to determine how these events were communicated to the public through news media. This mixed-methods study analyzed Philadelphia, Pennsylvania police data from 2006 to 2015. Using rolling temporal and distance buffers, we isolated shooting events involving multiple victims within a defined time period and geography. Selecting a definition of neighborhood mass shooting consistent with other common mass shooting definitions in which ≥4 victims were shot within 1 h and 100 m, we identified 46 events involving 212 victims over 10 years. We then searched public news media databases and used directed content analysis to describe the range and headline content from reports associated with the 46 events. Neighborhood mass shooting victims were more likely to be younger and female compared to other firearm-injured individuals (p < 0.001). Seven (15%) events received no news media attention, and 30 (77%) of the 39 reported events were covered solely in local/regional news. Only one event was named a "mass shooting" in any associated headline. In Philadelphia, neighborhood mass shootings occur multiple times per year but receive limited media coverage. The population health impact of these events is likely under-appreciated by the public and policymakers., (Copyright © 2019 Elsevier Inc. All rights reserved.)

Objective: To assess the psychological impact of a mass casualty incident (MCI) in a subset of personnel in a level I hospital., Methods: Emergency department staff responded to an MCI in June 2017 in Turin, Italy by an unexpected sudden surge of casualties following a stampede (mass escape). Participants completed the Psychological Simple Triage and Rapid Treatment Responder Self-Triage System (PsySTART-R), which classified the potential risk of psychological distress in "no risk" versus "at risk" categorization and identified a range of impacts aggregated for the population of medical responders. Participants were administered a questionnaire on the perceived effectiveness of management of the MCI. Two months later, the participants were evaluated using the Hospital Anxiety and Depression Scale (HADS), the Kessler Psychological Distress Scale (K6), and the Posttraumatic Stress Disorder Checklist (PCL-5)., Results: The majority of the responders were classified as "no risk" by the PsySTART-R; no significant differences on HADS, K6, and PCL-5 were found in the participants grouped by the PsySTART-R categories. The personnel acquainted to work in emergency contexts (emergency department and intensive care unit) scored significantly lower in the HADS than the personnel usually working in other wards. The number of positive PsySTART-R criteria correlated with the HADS depression score., Conclusions: Most of the adverse psychological implications of the MCI were well handled and averted by the responders. A possible explanation could be related to factors such as the clinical condition of the victims (most were not severely injured, no fatalities), the small number of casualties (87) brought to the hospital, the event not being considered life-threatening, and its brief duration, among others. Responders had mainly to cope with a sudden surge in casualties and with organizational issues.

Background: Immigrants crossing the Southern U.S. border are particularly susceptible to heat illness. We review 3 patients from a heat-related mass-casualty incident with variations in heat stroke presentation, course, and outcome., Case Report: On July 23, 2017, emergency medical services responded to a trafficking-related mass-casualty incident in San Antonio, Texas, involving 39 migrants found inside an abandoned tractor trailer without air conditioning who had been trafficked from Laredo, Texas. Three victims exhibiting heat stroke symptoms were taken to the ED of a large academic teaching hospital. Patient 1 was a 42-year-old man who presented with seizing, vomiting, and a core temperature of 38.8°C (101.8°F). His 54-day hospital course was notable for 2 cardiac arrests, disseminated intravascular coagulation, prolonged lactic acidosis, and residual kidney disease. Patient 2 was a 32-year-old man who presented to the emergency department intubated in the field with a core temperature of 40.7°C (105.3°F). His 60-day hospital course was notable for disseminated intravascular coagulation, severely elevated troponin, prolonged lactic acidosis, and stroke. Patient 3 was a 20-year-old man who presented with seizing and decorticate posturing, with a core temperature of 40.5°C (104.9°F). His 6-day hospital course was notable for rapid clinical improvement and full recovery. WHY SHOULD AN EMERGENCY PHYSICIAN BE AWARE OF THIS?: Emergency physicians will encounter heat stroke victims. Our patients were exposed to an identical environment, and while each patient was otherwise healthy and differed significantly only in age, they exhibited a diversity of heat stroke presentations and sequelae. Treatment prioritizes cooling, but rapid deterioration requires intensive treatment of multiorgan failure., (Copyright © 2019. Published by Elsevier Inc.)

Purpose: To describe the most severe casualties from the July 14th, 2016 terror attack in Nice that were treated at the Lenval University Children's Hospital (LUCH) of Nice (France)., Methods: Retrospective study about casualties treated at LUCH from Bastille Day Attack with injuries resulting in the need for surgery, resuscitation, or death. The type of lesions and surgery, duration of hospitalizations, complications, psychological status, and outcome at discharge were collected., Results: Eleven patients presented severe traumas including three adults. They were triaged and managed first by the Critical Care Physician on duty and by emergency room nurses with no additional staff. Six pediatric casualties needed surgery; seven patients were hospitalized in Pediatric Intensive Care Unit (PICU). Five deaths were reported. The most relevant injuries were: pelvic disjunction, lower limb fracture, vascular injuries, and head or trunk crush. As soon as it was possible, two surgeons attended the emergency room (ER) to help carry out the triage. Overall we performed twenty-eight surgeries, including two neurological, one vascular, and five orthopedic. We performed closed reduction and internal fixation (CRIF) in three cases of limb fractures. A compartment syndrome was observed. Stress disorders were observed in three patients, which merited psychiatric support and treatment., Conclusion: We faced uncommon situations with severe casualties without pre-hospital management. The presence of adult patients and unusual lesions increased the complexity. The presence of surgeons in the ER seemed useful for effective clinical decision-making. CRIF has been a valid option for damage control. Competence in vascular, neurological, major trauma surgery and psychic trauma should be available in any pediatric trauma center.

Background: Mass shootings are an increasingly common phenomenon in the United States. However, there is little research on whether the recent growth of income inequality is associated with this rise of mass shootings. We thus build on our prior research to explore the connection between income inequality and mass shootings across counties in the United States., Methods: We assemble a panel dataset of 3144 counties during the years 1990 to 2015. Socioeconomic data are extracted from the U.S. Bureau of the Census. Mass shootings data are from three databases that compile its information from the Federal Bureau of Investigation and media sources, respectively. These data are analyzed using random effects negative binomial regressions, while controlling for seven additional predictors of crime., Results: Counties experiencing a one standard deviation growth of income inequality witnessed 0.43 more mass shootings when using the definition of three or more victim injuries (incidence rate ratio [IRR] = 1.43; 95% confidence interval [CI] = 1.24, 1.66; P < .001) and 0.57 more mass shootings when using the designation of four or more victim deaths (IRR = 1.57; 95% CI = 1.26, 1.96; P < .001)., Conclusions: Counties with growing levels of income inequality are more likely to experience mass shootings. We assert that one possibility for this finding is that income inequality fosters an environment of anger and resentment that ultimately leads to violence.