Quantitative benchmarking of trauma-related prehospital response for Multiple Casualty Events (MCE) is complicated by major difficulties due to the simultaneous occurrences of multiple prehospital activities.

Attempts to quantify the various components of prehospital medical response in MCE have fallen short of a comprehensive model. The objective of this study was to model the principal parameters necessary to quantitatively benchmark the prehospital medical response in trauma-related MCE.

A two-step approach was adopted for the methodology of this study: an extensive literature search was performed, followed by prehospital system quantitative modeling. Studies on prehospital medical response to trauma injuries were used as the framework for the proposed model. The North Atlantic Treaty Organization (NATO) triage categories (T1-T4) were used for the study.

Two parameters, the Injury to Patient Contact Interval (IPCI) and Injury to Hospital Interval (IHI), were identified and proposed as the principal determinants of the medical prehospital response in trauma-related MCE. IHI is the time interval from the occurrence of injury to the completion of transfer of care of critical (T1) and moderate (T2) patients. The IHI for each casualty is compared to the Maximum Time Allowed described in the literature (golden hour for T1 and Friedrich's time for T2). In addition, the medical rescue factor (R) was identified as the overall indicator for the prehospital medical performance for T1 and T2, and a numerical value of one (R = 1) was proposed to be the quantitative benchmark.

A new quantitative model for benchmarking prehospital response to MCE in trauma-related MCE is proposed. Prospective studies of this model are needed to validate its applicability.

Bayram J, Zuabi S. Disaster metrics: a proposed quantitative model for benchmarking prehospital medical response in trauma-related multiple casualty events. Prehosp Disaster Med. 2012;27(2):-7.

The interaction between the acute medical consequences of a Multiple Casualty Event (MCE) and the total medical capacity of the community affected determines if the event amounts to an acute medical disaster.

There is a need for a comprehensive quantitative model in MCE that would account for both prehospital and hospital-based acute medical systems, leading to the quantification of acute medical disasters. Such a proposed model needs to be flexible enough in its application to accommodate a priori estimation as part of the decision-making process and a posteriori evaluation for total quality management purposes.

The concept proposed by de Boer et al in 1989, along with the disaster metrics quantitative models proposed by Bayram et al on hospital surge capacity and prehospital medical response, were used as theoretical frameworks for a new comprehensive model, taking into account both prehospital and hospital systems, in order to quantify acute medical disasters.

A quantitative model called the Acute Medical Severity Index (AMSI) was developed. AMSI is the proportion of the Acute Medical Burden (AMB) resulting from the event, compared to the Total Medical Capacity (TMC) of the community affected; AMSI = AMB/TMC. In this model, AMB is defined as the sum of critical (T1) and moderate (T2) casualties caused by the event, while TMC is a function of the Total Hospital Capacity (THC) and the medical rescue factor (R) accounting for the hospital-based and prehospital medical systems, respectively. Qualitatively, the authors define acute medical disaster as “a state after any type of Multiple Casualty Event where the Acute Medical Burden (AMB) exceeds the Total Medical Capacity (TMC) of the community affected.” Quantitatively, an acute medical disaster has an AMSI value of more than one (AMB / TMC > 1). An acute medical incident has an AMSI value of less than one, without the need for medical surge. An acute medical emergency has an AMSI value of less than one with utilization of surge capacity (prehospital or hospital-based). An acute medical crisis has an AMSI value between 0.9 and 1, approaching the threshold for an actual medical disaster.

A novel quantitative taxonomy in MCE has been proposed by modeling the Acute Medical Severity Index (AMSI). This model accounts for both hospital and prehospital systems, and quantifies acute medical disasters. Prospective applications of various components of this model are encouraged to further verify its applicability and validity.

Bayram JD, Zuabi S. Disaster metrics: quantification of acute medical disasters in trauma-related multiple casualty events through modeling of the Acute Medical Severity Index. Prehosp Disaster Med. 2012;27(2):1-6.

Road traffic accident (RTA) is a common cause of pediatric trauma death and disability, constituting a worldwide loss of financial resources and potential manpower. This study was designed to determine the causes, prehospital care, presentation, and injuries that resulted in deaths among pediatric victims of RTA in Nigeria, and to make suggestions, based on the study data, to reduce RTA deaths.

This is a retrospective analysis of pediatric RTA presenting to a Nigerian referral center. The records of all pediatric RTA between January 2006 and December 2010 at the University of Benin Teaching Hospital were analyzed for age, gender, causes of death, injury, rescue team prehospital treatment, injury to hospital arrival time, clinical condition on arrival, treatment, duration of hospitalization before death, challenges, and postmortem findings.

Twenty-six (18%) of 143 pediatric RTA, comprising 18 males and 8 females, between less than one and 18 (mean 9.3 ± 5.2) years of age died. There was no significant statistical demographic difference observed when 15 (58%) deaths recorded among 67 (46.9%) children involved in motor vehicle accidents were compared with 11 (42%) involved in 76 (53.1%) motorcycle accidents (P = .31). More severe injuries resulting in the majority of deaths were associated with alcohol intoxication (P < .0001). Fourteen (54%) of the deaths were pedestrians, eight of whom were selling wares on the roadside; six were crossing roads that had no traffic signs or traffic control. Of the eight vehicle passengers who died, only two wore seat belts or used pediatric car seats, with no statistical significance compared to those who did not use seat belts or car seats (P = .37). Four of 14 front seat passengers and four of 32 rear seat passengers died (P = .222). Of motorcycle passengers, none of those who wore protective crash helmets died, while four died who were not wearing helmets. Passers-by and sympathizers served as rescuers provided emergency treatment, and presented the victims between one hour and four days after the accidents. Head injury in 14 (54%) cases was the most common cause of death.

Pediatric RTA deaths in this study were due mainly to preventable causes. There is a need to stress road safety education to children, drivers, the general public and government policy formulators, and to adopt RTA preventive measures in this region of Nigeria.

Osifo OD, Osagie TO, Iribhogbe PE. Pediatric road traffic accident deaths presenting to a Nigerian referral center. Prehosp Disaster Med. 2012;27(2):1-6.

It is likely that calls for disaster medical assistance teams (DMATs) will continue in response to international disasters.

As part of a national survey, the present study was designed to evaluate leadership issues and use of standards in Australian DMATs.

Data was collected via an anonymous mailed survey distributed via State and Territory representatives on the Australian Health Protection Committee, who identified team members associated with Australian DMAT deployments from the 2004 Asian Tsunami disaster.

The response rate for this survey was estimated to be approximately 50% (59/118). Most of the personnel had deployed to the Asian Tsunami affected areas. The DMAT members were quite experienced, with 53% (31/59) of personnel in the 45-55 years of age group. Seventy-five percent (44/59) of the respondents were male. Fifty-eight percent (34/59) of the survey participants had significant experience in international disasters, although few felt they had previous experience in disaster management (5%, 3/59). There was unanimous support for a clear command structure (100%, 59/59), with strong support for leadership training for DMAT commanders (85%, 50/59). However only 34% (20/59) felt that their roles were clearly defined pre-deployment, and 59% (35/59) felt that team members could be identified easily. Leadership was identified by two team members as one of the biggest personal hardships faced during their deployment. While no respondents disagreed with the need for meaningful, evidence-based standards to be developed, only 51% (30/59) stated that indicators of effectiveness were used for the deployment.

In this study of Australian DMAT members, there was unanimous support for a clear command structure in future deployments, with clearly defined team roles and reporting structures. This should be supported by clear identification of team leaders to assist inter-agency coordination, and by leadership training for DMAT commanders. Members of Australian DMATs would also support the development and implementation of meaningful, evidence-based standards. More work is needed to identify or develop actual standards and the measures of effectiveness to be used, as well as the contents and nature of leadership training.

Aitken P, Leggat PA, Robertson AG, Harley H, Speare R, Leclercq MG. Leadership and use of standards by Australian disaster medical assistance teams: results of a national survey of team members. Prehosp Disaster Med. 2012;27(2):1-6.

Mobile health (mHealth) technology can play a critical role in improving disaster victim tracking, triage, patient care, facility management, and theater-wide decision-making.

To date, no disaster mHealth application provides responders with adequate capabilities to function in an austere environment.

The Operational Medicine Institute (OMI) conducted a qualitative trial of a modified version of the off-the-shelf application iChart at the Fond Parisien Disaster Rescue Camp during the large-scale response to the January 12, 2010 earthquake in Haiti.

The iChart mHealth system created a patient log of 617 unique entries used by on-the-ground medical providers and field hospital administrators to facilitate provider triage, improve provider handoffs, and track vulnerable populations such as unaccompanied minors, pregnant women, traumatic orthopedic injuries and specified infectious diseases.

The trial demonstrated that even a non-disaster specific application with significant programmatic limitations was an improvement over existing patient tracking and facility management systems. A unified electronic medical record and patient tracking system would add significant value to first responder capabilities in the disaster response setting.

Callaway DW, Peabody CR, Hoffman A, Cote E, Moulton S, Baez AA, Nathanson L. Disaster mobile health technology: lessons from Haiti. Prehosp Disaster Med. 2012;27(2):1-5.

There has been limited research on the perspectives and needs of national caregivers when confronted with large-scale societal violence. In Iraq, although the security situation has improved from its nadir in 2006-2007, intermittent bombings, and other hostilities continue. National workers remain the primary health resource for the affected populace.

To assess the status and challenges of national physicians working in the Emergency Departments of an active conflict area.

This study was a survey of civilian Iraqi doctors working in Emergency Departments (EDs) across Iraq, via a convenience sample of physicians taking the International Medical Corps (IMC) Doctor Course in Emergency Medicine, given in Baghdad from December 2008 through August 2009.

The 148 physician respondents came from 11 provinces and over 50 hospitals in Iraq. They described cardiovascular disease, road traffic injuries, and blast and bullet injuries as the main causes of death and reasons for ED utilization. Eighty percent reported having been assaulted by a patient or their family member at least once within the last year; 38% reported they were threatened with a gun. Doctors reported seeing a median of 7.5 patients per hour, with only 19% indicating that their EDs had adequate physician staffing. Only 19% of respondents were aware of an established triage system for their hospital, and only a minority had taken courses covering ACLS- (16%) or ATLS-related (24%) material. Respondents reported a wide diversity of prior training, with only 3% having some type of specialized emergency medicine degree.

The results of this study describe some of the challenges faced by national health workers providing emergency care to a violence-stricken populace. Study findings demonstrate high levels of violent behavior directed toward doctors in Iraqi Emergency Departments, as well as staffing shortages and a lack of formal training in emergency medical care.

Donaldson RI, Shanovich P, Shetty P, Clark E, Aziz S, Morton M, Hasoon T, Evans G. A survey of national physicians working in an active conflict zone: the challenges of emergency medical care in Iraq. Prehosp Disaster Med. 2012;27(2):1-9.

Radioactive contamination can occur as a result of accidental or intentional release of radioactive materials (RM) into the environment. RM may deposit on clothing, skin, or hair. Decontamination of contaminated persons should be done as soon as possible to minimize the deleterious health effects of radiation. The goal of this study was to evaluate the decontamination efficiency (for residual contaminant) of the active components of “Shudhika,” an indigenously developed skin decontamination kit. The study kit is for external radioactive decontamination of intact skin.

Decontamination efficiency was evaluated on the skin surface of rabbit (n = 6) and human volunteers (n = 13). 99mTc sodium pertechnetate (200-250 μCi) was used as the radio-contaminant. Skin surface area (5 × 5 cm2) of thoracic abdominal region of the rabbit and the forearm and the palm of human volunteers were used for the study. Decontamination was performed by using cotton swabs soaked with chemical decontamination agents of the kit.

Decontamination efficiency (% of the contaminant removed) was calculated for each component of the study. Overall effectiveness of the kit was calculated to be 85% ± 5% in animal and 92% ± 3% in human skin surfaces. Running water and liquid soap with water was able to decontaminate volunteers' hand and animal skin up to 70% ± 5%. Chemical decontamination agents were applied only for trace residues (30% ± 5%). Efficiency of all the kit components was found up to be 20% ± 3% (animal) and 28% ± 2 (human), respectively. Residual contamination after final decontamination attempt for both the models was observed to be 12% ± 3% and 5% ± 2%. After 24 and 48 hours of the decontamination procedure, skin was found to be normal (no redness, erythema and edema were observed).

Decontaminants of the study kit were effective in removal of localized radioactive skin contamination when water is ineffective for further decontamination. By using the chemical decontaminants of the study kit, the use of water and radioactive waste generation could be reduced. Cross-contamination could also be avoided. During radiologic emergencies where water may be radioactively contaminated, the study kit could be used.

Rana S, Dutta M, Soni NL, Chopra MK, Kumar V, Goel R, Bhatnagar A, Sultana S, Sharma RK. Decontamination of human and rabbit skin experimentally contaminated with 99mTc radionuclide using the active components of “Shudika”—a skin decontamination kit. Prehosp Disaster Med. 2012;27(2):1-5.

The objective of this study was to determine whether Emergency Medical Services (EMS) records can identify bars that serve a disproportionate number of minors, and if government officials will use this data to direct underage drinker enforcement efforts.

Emergency Medical Services call logs to all bars in the study area were cross-referenced with a local hospital's records. The records of patients with alcohol-related complaints were analyzed. Outlier bars were identified, and presented to government officials who completed a survey to assess if this information would prompt new enforcement efforts.

Emergency Medical Services responded to 149 establishments during the study period. Eighty-four responses were distributed across six bars, and 78 were matched with the hospital's records. Fifty-one patients, 18 (35%) of whom were underage, were treated for alcohol intoxication, with 46% of the cases originating from four bars. Government officials found the information useful, and planned to initiate new operations based on the information.

Alcohol consumption by minors can lead to life-long abuse, with high personal, financial, and societal costs. Emergency Medical Services response data and hospital records can be used to identify bars that allow underage drinking, which is useful in directing law enforcement efforts.

Lemkin DL, Bond MC, Alves DW, Bissell RA. A public health enforcement initiative to combat underage drinking using emergency medical services call data. Prehosp Disaster Med. 2012;27(2):1-5.

A 7.0 magnitude earthquake struck Haiti on January 12, 2010, resulting in 222,000 deaths and 300,000 injuries. Three weeks after the initial quake, the New Mexico Disaster Medical Assistance Team (NM DMAT-1) was deployed to Haiti for ongoing medical relief. During this deployment, a portable handheld ultrasound machine was tested for usefulness in aiding with patient care decisions.

The utility of portable ultrasound to help with triage and patient management decisions in a major disaster setting was evaluated.

Retrospective observational non-blinded images were obtained on 51 patients voluntarily presenting to the Gheskio Field clinic at Port-au-Prince. Ultrasound was used for evaluation of undifferentiated hypotension, torso trauma, pregnancy, non-traumatic abdominal pain, deep venous thrombosis and pulmonary embolism, and dyspnea-chest pain, as well as for assisting with procedures. Scans were obtained using a Signos personal handheld ultrasound machine with images stored on a microSD card. Qualitative data were reviewed to identify whether ultrasound influenced management decisions, and results were categorized in terms of percent of scans that influenced management.

Fifty-one ultrasound scans on 50 patients were performed, with 35% interpreted as positive, 41% as negative, and 24% as equivocal. The highest yields of information were for abdominal ultrasound and ultrasound related to pregnancy. Ultrasound influenced decisions on patient care in 70% of scans. Most of these decisions were reflected in the clinician's confidence in discharging a patient with or without non-emergent follow-up.

The use of a handheld portable ultrasound machine was effective for patient management decisions in resource-poor settings, and decreased the need to triage selected patients to higher levels of care. Ultrasound was very useful for evaluation of non-traumatic abdominal pain. Dynamic capability is necessary for ultrasound evaluation of undifferentiated hypotension and cardiac and lung examinations. Ultrasound also was useful for guidance during procedural applications, and for aiding in the diagnosis of parasitic diseases.

Shorter M, Macias D. Portable handheld ultrasound in austere environments: use in the Haiti disaster. Prehosp Disaster Med. 2012;27(2):1-6.

Japan has a long history of disaster due to its location on the “Pacific Ring of Fire.” The frequency of earthquakes experienced in recent years has had significant influence on disaster health research in Japan. This paper describes disaster health research trends in Japan, with an emphasis on disaster nursing research.

A systematic literature review of disaster health research in Japan from 2001 through 2007 was conducted for this study. The most commonly used database in Japan, Ichushi (version 4.0), was used for this literature review. The keywords and sub-keywords used were: disaster, disaster nursing, practice, education, ability, response, emergency, licensure, capability, function, prevention, planning and research. These keywords were sometimes used in combination to identify relevant literature.

A total of 222 articles were reviewed. The number of research papers available increased gradually from 2001 through 2007. The most common articles used were found using the search category of “disaster nursing and research.” Among the search categories, “disaster nursing and education” also had a high number of publications. This category also peaked in 2007.

The recent experiences of natural disaster in Japan accelerated the impetus to explore and implement a disaster nursing concept into practice and nursing curricula. Further evidence-based studies to develop methodology and other areas of studies in disaster nursing, including other language databases are to be expected in the future.

Kako M, Mitani S, Arbon P. Literature review of disaster health research in Japan: focusing on disaster nursing education. Prehosp Disaster Med. 2012;27(2):1-6.

Humanitarian surgery is often organized and delivered with short notice and limited time for developing unique strategies for providing care. While some surgical pathologies can be anticipated by the nature of the crisis, the role of foreign medical teams in treating the existing and unmet burden of surgical disease during crises is unclear. The purpose of this study was to examine published data from crises during the years 1990 through 2011 to understand the role of foreign medical teams in providing surgical care in these settings.

A literature search was completed using PubMed, MEDLINE, and EMBASE databases to locate relevant manuscripts published in peer-reviewed journals. A qualitative review of the surgical activities reported in the studies was performed.

Of 185 papers where humanitarian surgical care was provided by a foreign medical team, only 11 articles met inclusion criteria. The reporting of surgical activities varied significantly, and pooled statistical analysis was not possible. The quality of reporting was notably poor, and produced neither reliable estimates of the pattern of surgical consultations nor data on the epidemiology of the burden of surgical diseases. The qualitative trend analysis revealed that the most frequent procedures were related to soft tissue or orthopedic surgery. Procedures such as caesarean sections, hernia repairs, and appendectomies also were common. As length of deployment increased, the surgical caseload became more reflective of the existing, unmet burden of surgical disease.

This review suggests that where foreign medical teams are indicated and requested, multidisciplinary surgical teams capable of providing a range of emergency and essential surgical, and rehabilitation services are required. Standardization of data collection and reporting tools for surgical care are needed to improve the reporting of surgical epidemiology in crisis-affected populations.

Nickerson JW, Chackungal S, Knowlton L, McQueen K, Burkle FM Jr. Surgical care during humanitarian crises: a systematic review of published surgical caseload data from foreign medical teams. Prehosp Disaster Med. 2012;27(2):1-6.

The Emergency Department (ED) is the triage, stabilization and disposition unit of the hospital during a mass-casualty incident (MCI). With most EDs already functioning at or over capacity, efficient management of an MCI requires optimization of all ED components. While the operational aspects of MCI management have been well described, the architectural/structural principles have not. Further, there are limited reports of the testing of ED design components in actual MCI events. The objective of this study is to outline the important infrastructural design components for optimization of ED response to an MCI, as developed, implemented, and repeatedly tested in one urban medical center.

In the authors’ experience, the most important aspects of ED design for MCI have included external infrastructure and promoting rapid lockdown of the facility for security purposes; an ambulance bay permitting efficient vehicle flow and casualty discharge; strategic placement of the triage location; patient tracking techniques; planning adequate surge capacity for both patients and staff; sufficient command, control, communications, computers, and information; well-positioned and functional decontamination facilities; adequate, well-located and easily distributed medical supplies; and appropriately built and functioning essential services.

Designing the ED to cope well with a large casualty surge during a disaster is not easy, and it may not be feasible for all EDs to implement all the necessary components. However, many of the components of an appropriate infrastructural design add minimal cost to the normal expenditures of building an ED.

This study highlights the role of design and infrastructure in MCI preparedness in order to assist planners in improving their ED capabilities. Structural optimization calls for a paradigm shift in the concept of structural and operational ED design, but may be necessary in order to maximize surge capacity, department resilience, and patient and staff safety.

Halpern P, Goldberg SA, Keng JG, Koenig KL. Principles of Emergency Department facility design for optimal management of mass-casualty incidents. Prehosp Disaster Med. 2012;27(2):1-9.