Triage in military settings

Ethical Issues Regarding Neurosurgical Management of Penetrating Brain Injury in the French Armed Forces

Combat penetrating brain injury (PBI) differs significantly from PBI in civilian environments. Differences include technical factors such as the weapons involved, strained resource environments, and limited medical materials and human resources available. Ethical issues regarding the management of PBI in military settings may occur. This case study examines the case of a 20-year-old member of the French Armed Forces that suffered a penetrating brain injury in a combat situation. The four-quadrant method along with the four principles of medical ethics (respect for autonomy, beneficence, nonmaleficence, and justice) was used to analyze this case and to apply ethics to the practice of military medicine. Nowadays, we possess the medical and surgical resources as well as the aeromedical evacuation capability to save the life of a soldier with a penetrating craniocerebral wound. Nonetheless, the functional outcome of this type of wound places military doctors in an ethical dilemma. The line of conduct and clinical protocol established by the French Medical Health Service is to manage all PBIs when the patient's life can be saved and to provide all available financial and social support for the rehabilitation of patients and their family.

Healthcare Workers' Assessment of a Visual Triage System (VTS)

Overcrowding and extended waiting times in the emergency department (ED) can pose a significant risk of COVID-19 transmission from patients to healthy individuals. In 2017, the Saudi Ministry of Health (MOH) introduced a visual triage system (VTS) with scoring to notify healthcare workers (HCWs) in EDs about the Middle East respiratory syndrome coronavirus (MERS-CoV) infection risk. During the COVID-19 pandemic, the MOH employed a VTS to classify patients according to their potential risk of COVID-19 infection upon their admission to the ED. Suspected patients were then directed along specific pathways to reduce their contact with healthy individuals. This study assessed HCWs' satisfaction with the VTS in the ED of two major government hospitals within the Riyadh region. Additionally, it assessed HCWs' perceptions of VTS effectiveness. This study used a cross-sectional, observational design and relied on surveys for data collection. A total of 127 participants completed the survey, of which 87 (68.5%) were based in the EDs of the two hospitals. Among the ED participants, 18.1% expressed satisfaction with the VTS, 46.4% were neutral, and 33.1% reported dissatisfaction. ED participants provided feedback on the system's effectiveness, with 24.1% finding it effective, 66.7% considering it somewhat effective, and 9.2% deeming it ineffective. Of the total (127) study participants (70.1%) reported that the HCWs required better training to effectively implement the VTS infection control plans for suspected cases. Fewer than half of the participants (35.4%) deemed the time spent by VTS personnel to identify COVID-19 cases to be reasonable, whereas 22% found it too short and 27.6% considered it too long. Of the total 127 participants, 63% reported that language differences between patients and HCWs constituted barriers to the effective application of the VTS. Our study findings indicated that most ED participants had a neutral outlook on their satisfaction with the VTS and a neutral perspective on the effectiveness of VTS, viewing it as only somewhat effective. Reported weaknesses and key obstacles to the successful implementation of the VTS included language barriers. and insufficient training for HCWs, and unclear VTS pathways. The reported strengths of the VTS included its effectiveness in reducing crowds and identification of COVID-19 patients.

Neuro damage control: current concept and civilian applications

Damage control (DC) initially referred to abbreviated (<1 h) surgical procedures to control abdominal hemorrhage in severe trauma patients, to avoid the 'bloody vicious circle' of hypothermia-coagulopathy-acidosis-hypocalcemia. Progressively, the concept was extended to pre-hospital and peri-operative surgical and non-surgical trauma care. The DC strategy can be applied either in a single severe trauma patient at risk of progression toward the bloody vicious circle or in case of limited or overwhelmed health resources (deprived environment, mass casualties, etc.). DC strategies in neurological casualties have improved over the last decade in military neurosurgeons, but remain poorly codified in civilian settings. In this comprehensive review, we summarize the current concept of neuro-DC, which includes surgical and medical care for neurological injuries as part of a DC strategy. Neuro-DC basically consists in: (i) preventing secondary brain injury; (ii) controlling intracranial bleeding; (iii) controlling intracranial pressure; (iv) limiting contamination of compound wounds; and (v) achieving secondary anatomical restoration.

Neurosurgical management of penetrating brain injury during World War I: A historical cohort

During World War I, 25% of penetrating injuries were in the cephalic region. Major Henri Brodier described his surgical techniques in a book in which he reported every consecutive penetrating brain injury (PBI) that he operated on from August 1914 to July 1916. The aim was to collate his data and discuss significant differences in management between soldiers who survived and those who died. We conducted a retrospective survey that included every consecutive PBI patient operated on by Henri Brodier from August 1914 to April 1916 and recorded in his book. We reported medical and surgical management. Seventy-seven patients underwent trepanation by Henri Brodier for PBI. Regarding injury mechanism, 66 procedures (86%) were for shrapnel injury. Regarding location, 21 (30%) involved the whole convexity. Intracranial venous sinus wound was diagnosed intraoperatively in 11 patients (14%). Postoperatively, 7 patients (9%) had seizures, 5 (6%) had cerebral herniation, 3 (4%) had cerebral abscess, and 5 (6%) had meningitis. No patients with abscess or meningitis survived. No significant intergroup differences were found for injury mechanism or wound location, including the venous sinus. Extensive initial surgery with debridement must be prioritized. Infectious complications must not be neglected. We should not forget the lessons of the past when managing casualties in present-day and future conflicts.

Application of a Near-infrared Spectroscope by an Extreme Forward Medical Team for the Triage of Casualties With Traumatic Brain Injury

BACKGROUND

During deployment of military medical teams similarly to prehospital practice, without immediate computed tomography scan access, identifying patients requiring neuro-specific care to manage pragmatic triage proves crucial. We assessed the contribution of this portable near-infrared spectroscope (NIRS) handheld device, Infrascanner Model 2000 (InfraScan Inc.; Philadelphia, PA), to screen patients suspected to require specific neurosurgical care.

MATERIALS AND METHODS

This single-center retrospective analysis was based on the data from the medical records of the traumatic brain injured patients. We analyzed all the patients strictly over 18 years old presenting a clinical history of traumatic brain injury (TBI) with a Glasgow Coma Scale (GCS) < 15.

RESULTS

Thirty-seven medical records of patients admitted for TBI met the inclusion criteria for our analysis. The median GCS was 9 [3-14]. Eight patients (21.6%) underwent neurosurgery and 25 (67.6%) required intensive care unit (ICU) admission, after initial assessment and resuscitation. The NIRS was the most sensible to detect intracranial hematoma (n = 21), intracranial hematoma leading to surgery (n = 8), and intracranial hematoma leading to admission in ICU (n = 25). Its negative predictive value was 100% regarding hematomas leading to surgery. False-positive results were encountered in 10 cases (27.0%). Excluding cases harboring confounding extracranial hematomas, parietal area was still the most represented (n = 3).

CONCLUSION

The NIRS was relevant to detect hematoma leading to prompt surgery in our study. The lack of specificity in a nonselected cohort of patients underlines the need to associate simple clinical feature such as neurological deficit and NIRS results to perform rational triage.

European Burns Association guidelines for the management of burn mass casualty incidents within a European response plan

BACKGROUND

A European response plan to burn mass casualty incidents has been jointly developed by the European Commission and the European Burn Association. Upon request for assistance by an affected country, the plan outlines a mechanism for coordinated international assistance, aiming to alleviate the burden of care in the affected country and to offer adequate specialized care to all patients who can benefit from it. To that aim, Burn Assessment Teams are deployed to assess and triage patients. Their transportation priority recommendations are used to distribute outnumbering burn casualties to foreign burn centers. Following an appropriate medical evacuation, these casualties receive specialized care in those facilities.

METHODS

The European Burns Association's disaster committee developed medical-organizational guidelines to support this European plan. The experts identified fields of interest, defined questions to be addressed, performed relevant literature searches, and added their expertise in burn disaster preparedness and response. Due to the lack of high-level evidence in the available literature, recommendations and specially designed implementation tools were provided from expert opinion. The European Burns Association officially endorsed the draft recommendations in 2019, and the final full text was approved by the EBA executive committee in 2022.

RECOMMENDATIONS

The resulting 46 recommendations address four fields. Field 1 underlines the need for national preparedness plans and the necessary core items within such plans, including coordination and integration with an international response. Field 2 describes Burn Assessment Teams' roles, composition, training requirements, and reporting goals. Field 3 addresses the goals of specialized in-hospital triage, appropriate severity criteria, and their effects on priorities and triage. Finally, field 4 covers medical evacuations, including their timing and organization, the composition of evacuation teams and their assets, preparation, and the principles of en route care.

Bioethics in humanitarian disaster relief operations: a military perspective

The ethical dilemmas faced every day by military personnel working within the NHS will potentially be very different to ones that will be faced in the wake of a humanitarian disaster. Allied to this the potentially differing objectives from military personnel when compared with other healthcare workers in these scenarios and a conflict of ethics could arise.Within this paper, the fundamentals of this conflict will be explored and how working within the military framework can affect clinical decisions. This is a paper commissioned as a part of the humanitarian and disaster relief operations special issue of BMJ Military Health.

Usefulness of Selected Peripheral Blood Counts in Predicting Death in Patients with Severe and Critical COVID-19

BACKGROUND

Immune dysregulation and hypoxemia are two important pathophysiological problems in patients with COVID-19 that affect peripheral blood count parameters. We hypothesized that assessment of the neutrophil-lymphocyte ratio (NLR) and red blood cell distribution width index (RDW-SD) could predict death in patients with severe and critical COVID-19.

METHODS

Seventy patients admitted to the intensive care unit (ICU) for COVID-19 acute respiratory failure were included in the study. RDW-SD and NLR on the day of ICU admission and peak values during the entire hospitalization were assessed. The primary endpoint was death before ICU discharge.

RESULTS

Patients who died had higher NLR on admission (20.3, IQR 15.3-30.2 vs. 11.0, IQR 6.8-16.9; p = 0.003) and higher RDW-SD (48.1 fL; IQR 43.1-50.5 vs. 43.9 fL; IQR 40.9-47.3, p = 0.01) than patients discharged from the ICU. NLR and RDW-SD values on ICU admission accurately predicted death in 76% (AUC = 0.76; 95%CI 0.65-0.86; p = 0.001; cut-off > 14.38) and 72% of cases (AUC = 0.72; 95%CI 0.60-0.82; p = 0.003; cut-off > 44.7 fL), respectively. Multivariable analysis confirmed that NLR > 14.38 on the day of ICU admission was associated with a 12-fold increased risk of death (logOR 12.43; 95%CI 1.61-96.29, p = 0.02), independent of other blood counts, clinical and demographic parameters.

CONCLUSIONS

Neutrophil-lymphocyte ratio determined on the day of ICU admission may be a useful biomarker predicting death in patients with severe and critical COVID-19.

The French Pre-Deployment Advanced Course in Anesthesia and Resuscitation: Development and Future Prospects

INTRODUCTION

Military anesthesiologists from the French Military Medical Service (FMMS) are part of the Forward Surgical Teams deployed in overseas military operations. The practice of anesthesia in combat zones requires specific skills that are not taught during the initial curriculum for French civilian anesthesiologist. The Pre-Deployment Advanced Course in Anesthesia and Resuscitation (DACAR) program was developed to prepare military anesthesiologist from the FMMS before their deployment in overseas military operations.

METHODS

Created in 2013 by the French Military Medical Academy, the DACAR program is divided into two modules and carried out once a year. The DACAR program trains all military anesthesiologist residents at the end of their curricula. Since 2019, a number of Certified Registered Nurse Anesthetists have completed the DACAR program. The DACAR program is organized around the main axes of experience feedback from previous deployments in combat zones as well as didactic learning and practical training using high-fidelity simulation.

RESULTS

Since 2013, a total of 99 trainees completed the DACAR program during six complete cycles of two modules. The DACAR program has gradually been enriched from 14 courses in 2013 to 28 in 2019. Participants' reported satisfaction rates have increased steadily since 2016, when 88% of courses were rated as "interesting" or "very interesting," and only 4% as "not very interesting." By 2019, those figures had improved to 96% and 2%, respectively.

CONCLUSION

The DACAR program is a structured and adapted military medical course aimed at completing the curriculum of military anesthesiologists from the FMMS before deployment in overseas military operations. Regular audits and updates ensure that the DACAR training program maintains the highest standards of quality and rigor.

Automated remote decision-making algorithm as a primary triage system using machine learning techniques

OBJECTIVE

An objective and convenient primary triage procedure is needed for prioritizing patients who need help in mass casualty incident (MCI) situations, where there is a lack of medical staff and available resources. This study aimed to develop an automated remote decision-making algorithm that remotely categorize a patient's emergency level using clinical parameters that can be measured with a wearable device.

APPROACH

The algorithm was developed according to the following procedures. First, we used the National Trauma Data Bank data set, a large open trauma patient data set assembled by the American College of Surgeons (ACS). In addition, we performed pre-processing to exclude data when the vital sign or consciousness indicator value was missing or physiologically in an abnormal range. Second, we selected the T-RTS method, which classifies emergency levels into four classes (Delayed, Urgent, Immediate and Dead), as the primary outcome. Third, three machine learning methods widely used in the medical field, logistic regression, random forest, and deep neural network (DNN), were applied to build the algorithm. Finally, each method was evaluated using quantitative performance indicators including the macro-averaged f1 score, macro-averaged mean absolute error (MMAE), and the area under the receiver operating characteristic curve (AUC).

MAIN RESULTS

For total sets, the logistic regression had a macro-averaged f1 score of 0.673, an MMAE of 0.387 and an AUC value of 0.844 (95% CI, 0.843-0.845), while the random forest and DNN had macro-averaged f1 scores of 0.783 and 0.784, MMAEs of 0.297 and 0.298 and AUC values of 0.882 (95% CI, 0.881-0.883) and 0.883(95% CI, 0.881-0.884), respectively.

SIGNIFICANCE

In a comprehensive analysis of these results, our algorithm demonstrated a viable approach that could be practically adopted in an MCI. In addition, it can be employed to transfer patients and to redistribute available resources according to their priorities.

Early outcomes following trauma related to sex: A matched analysis of military service members in the department of defense trauma registry

BACKGROUND

Several studies have identified sex as a factor influencing early outcomes after trauma. With the increased representation of women in combat roles, there is a need for improved understanding of the pathophysiology of traumatic injury in women. The purpose of this study was to define sex-based differences in early combat trauma outcomes amongst military service members.

METHODS

A retrospective review of the Department of Defense Trauma Registry between 2008 and 2016 was performed. A 2:1 case control match was performed to match for Injury Severity Score, mechanism of injury, and age. The primary outcome of the study was mortality.

RESULTS

A total of 4,625 patients were included in the study, 2.2% of whom were women. Women were less significantly injured than men (Injury Severity Score, 7.7 vs. 11, p = 0.003) and more likely to sustain blunt trauma (81% vs. 62.5%, p = 0.01). After case-control matching, 202 men and 101 women were evaluated. There was no statistical difference in the primary outcome of mortality. There was no statistical difference in Glasgow Coma Scale score, crystalloid or colloid administration, Packed Red Blood Cells (PRBC), platelet, cryoprecipitate, or plasma usage between men and women.

CONCLUSION

Contrary to the civilian trauma literature, our study demonstrated no significant difference in early mortality between male and female combat casualties in a matched cohort. This finding may represent a difference in injury patterns, resuscitation practices, or lifesaving interventions in a deployed setting as compared with civilian setting. As the proportion of women involved in combat operations continues to increase, prospective studies should be performed to better define injury patterns, as well as early and late outcomes related to military trauma in the female population.

LEVEL OF EVIDENCE

Retrospective, Level IV.

The Damage Control Resuscitation and Surgical Team: The New French Paradigm for Management of Combat Casualties

INTRODUCTION

The aim of this work was to introduce the new French forward resuscitation and surgical unit. It's also to discuss the choices and waivers granted to fit the tactical context of modern conflicts and the current epidemiology of combat casualties.

MATERIALS AND METHODS

A multidisciplinary task force of 11 people proceeded to the conception and the creation of a new military resuscitation and surgical unit. The preliminary work included a scoping review of the combat casualties' epidemiology in modern conflicts and an analysis of the recent French medical-surgical treatment facilities lessons learned. In April 2019, a technical-operational evaluation was conducted to confirm all the technical, ergonomic, and organizational choices made during the design phase.

RESULTS

The multidisciplinary task force resulted in the creation of the Damage Control Resuscitation and Surgical Team (DCRST). The DCRST focused on the resuscitation strategy, including transfusion of blood products, and the life-saving surgical procedures to be performed as close as possible to the point of injury. It was designed for the resuscitation of two patients: the life-saving surgery of two patients and the very short-term intensive care (<12 hours) of four patients at the same time. The DCRST provided sufficient autonomy to provide take care of four T1 and four T2 or T3 casualties per day for 48 hours. It was armed with 23 soldiers. The technical equipment represented 5,300 kg and 27 m3. All the technical medical equipment could be stored in two 20-foot containers.

CONCLUSION

The DCRST represents a new paradigm in medical support of French military operations. It offers the advantage of two combat casualties' surgical management at the same time, as close as possible to the combat zone. It responds to a 2-fold epidemiological and logistical challenge.

Not Just Hocus POCUS: Implementation of a Point of Care Ultrasound Curriculum for Internal Medicine Trainees at a Large Residency Program

INTRODUCTION

In 2018, the American College of Physicians formally acknowledged the importance of Point of Care Ultrasound (POCUS) to the practice of internal medicine (IM). For the military internist, POCUS training is critical for care of the trauma patient in austere environments, mass casualty events and natural disasters. While emergency medicine and critical care training programs have adopted POCUS education, few IM programs have integrated POCUS into their core curricula. We designed and implemented an iterative POCUS curriculum for trainees at a large military IM residency program over a two-year period.

METHODS

In collaboration with our critical care and simulation departments, we developed a pilot curriculum consisting of five, 60-minute courses offered on a voluntary basis at monthly intervals throughout 2017. Based on the pilot's success we incorporated a POCUS curriculum into the core academics received by all IM trainees during the 2017-2018 academic year. Trainees attended seven, 3-hour sessions during their scheduled academic time taught by subspecialists with POCUS expertise in an on-site simulation center. Baseline surveys and knowledge assessment examinations were administered during orientation and repeated at the end of the academic year. Comparison of results before and after the POCUS curriculum was the primary outcome evaluated.

RESULTS

Intervention #1: Pilot, 2016-2017 Academic Year45 trainees attended at least one course with an average of 1.8 sessions per trainee. Baseline survey data showed 91% of trainees believe POCUS is quite or extremely beneficial for their patients, but 73% feel slightly or not at all confident in POCUS knowledge. The pre-test mean and median scores were 71% and 77% respectively, which both increased to a post-test mean and median of 81%. Post-test mean percentage correct for trainees attending 1, 2, or 3 courses was 74%, 82%, and 91% respectively. Intervention #2: Incorporation of POCUS into Core Academics, 2017-2018 Academic YearAll 75 trainees participated in training with an average of 3.77 sessions attended per trainee. Survey analysis revealed significant improvement in confidence of performing ultrasound-guided procedures (p = 0.0139), and a 37% absolute increase in respondents who anticipate using ultrasound in their clinical practice (p = 0.0003). The mean pre-test score was 67.8% with median of 63.6% while mean and median post-test scores were 82.1% and 81.8%, with an absolute improvement of 14.3% and 18.2% respectively (p = 0.0004).

CONCLUSION

A structured POCUS curriculum was successfully incorporated at a large multiservice military IM residency program, with demonstrated retention of knowledge, improved confidence in performance of ultrasound guided invasive procedures, and increased interest in the use of POCUS in future clinical practice. Similar programs should be implemented across all IM programs in military graduate medical education to enhance operational readiness and battlefield care.

Manchester Arena Attack: management of paediatric penetrating brain injuries

PURPOSE

The Manchester Arena bombing on 22 May 2017 resulted in 22 deaths and over 160 casualties requiring medical attention. Given the threat of modern- era terrorist attacks in civilian environments, it is important that we are able to anticipate and appropriately manage neurological injuries associated with these events. This article describes our experience of managing paediatric neurosurgical blast injuries, from initial triage and operative management to longer-term considerations.

MATERIALS AND METHODS

Case study and literature review.

RESULTS

Paediatric traumatic and penetrating brain injury patients often make a good neurological recovery despite low GCS at time of injury; this should be accounted for during triage and operative decision making in major trauma, mass casualty events. Conservative management of retained shrapnel is advocated in view of low long-term infection rates with retained shrapnel and worsened neurological outcome with shrapnel retrieval. All penetrating brain injuries should receive a prolonged course of broad-spectrum antibiotics and undergo long term follow-up imaging to monitor for the development of cerebral abscesses. MRI should never be utilised in penetrating brain injury cases, even in the absence of macroscopically visible fragments, due to the effect of MRI ferromagnetic field torque on shrapnel fragments. Anti-epileptic drugs should only be prescribed for the initial seven days after injury, as continuing beyond this does not incur any benefit in the reduction of long term post-traumatic epilepsy.

CONCLUSION

All receiving neurosurgical units should become familiar with optimum management of these thankfully rare, but complex injuries from their initial presentation to long term follow up considerations. All neurosurgical units should have well-rehearsed local plans to follow in the event of such incidents, ensuring timely deliverance of appropriate neurosurgical care in such extreme settings.

Ethical surgical triage of patients with head and neck cancer during the COVID-19 pandemic

BACKGROUND

Coronavirus has serially overtaken our metropolitan hospitals. At peak, patients with acute respiratory distress syndrome may outnumber mechanical ventilators. In our Miami Hospital System, COVID-19 cases have multiplied for 4 weeks and elective surgery has been suspended.

METHODS

An Otolaryngologic Triage Committee was created to appropriately allocate resources to patients. Hospital ethicists provided support. Our tumor conference screened patients for nonsurgical options. Patients were tested twice for coronavirus before performing urgent contaminated operations. N95 masks and protective equipment were conserved when possible. Patients with low-grade cancers were advised to delay surgery, and other difficult decisions were made.

RESULTS

Hundreds of surgeries were canceled. Sixty-five cases screened over 3 weeks are tabulated. Physicians and patients expressed discomfort regarding perceived deviations from standards, but risk of COVID-19 exposure tempered these discussions.

CONCLUSIONS

We describe the use of actively managed surgical triage to fairly balance our patient's health with public health concerns.

Terrorist threat: Creating a nationwide damage control training program for non-trauma care providers

INTRODUCTION

The current terrorist threat challenges nations to train numerous non-trauma care providers with different backgrounds in damage control (DC) strategies. The purpose of this work was to propose a specific DC training program.

METHODS

A Task Force of 16 civilian and military physicians met for a 24-hour session, to propose the construction of a DC training program for non-specialised caregivers.

RESULTS

Existing DC training programs are heterogeneous, mainly theoretical and almost only for physicians. A program entitled Damage Control for Terrorist Attack Victims (DC-TAV) was then proposed. Identified training targets were care providers from prehospital and hospital staffs, with no experience in trauma care. The training objectives were the improvement of individual and collective skills in managing terrorist attacks casualties. The tools selected for training concerned e-learning on a dedicated digital teaching platform (including a core section of four modules with types and mechanisms of injury, basic DC techniques, triage, organisation of emergency medical response and two complementary modules for doctors with DC resuscitation including remote transfusion and DC surgery), hands-on workshops with procedural simulation and full-scale simulation exercises, technical (tourniquets, haemostatic gauzes, needle thoracostomy, chest tube drainage, management of airway, coniotomy) and non-technical (leadership, communication, coordination and triage, decision-making, appropriate use of resources) skills. Finally, an evaluation of the DC-TAV program was planned.

CONCLUSIONS

The DC-TAV program is an ambitious, civilian-military, nationwide and long-term program, based on a harmonised standard of care and including multidimensional training. Further studies are required to assess its efficacy.

Five years of prolonged field care: prehospital challenges during recent French military operations

BACKGROUND

French military operations in the Sahel conducted since 2013 over more than 5 million square kilometers have challenged the French Military Health Service with specific problems in prolonged field care.

STUDY DESIGN AND METHODS

To describe these challenges, we retrospectively analyzed the prehospital data from the first 5 years of these operations within a delimited area.

RESULTS

One hundred eighty-three servicemen of different nationalities were evacuated, mainly as a result of explosions (73.2%) or gunshots (21.9%). Their mean number evacuation was 2.2 (minimum, 1; maximum, 8) per medical evacuation with a direct evacuation from the field to a Role 2 medical treatment facility (MTF) for 62% of them. For the highest-priority casualties (N = 46), the median time [interquartile range] from injury to a Role 2 MTF was 130 minutes [70 minutes to 252 minutes], exceeding 120 minutes in 57% of cases and 240 minutes in 26%. The most frequent out-of-hospital medical interventions were external hemostasis, airway and hemopneumothorax management, hypotensive resuscitation, analgesia, immobilization, and antibiotic administration. Prehospital transfusion (RBCs and/or lyophilized plasma) was started three times in the field, two times during helicopter medical evacuation, and five times in tactical fixed wing medical aircraft. Lyophilized plasma was confirmed to be particularly suitable in these settings. One of the specific issues involved in lengthy prehospital time was the importance to reassess and convert tourniquets prior to Role 2 MTF admission.

CONCLUSION

Main challenges identified include reducing evacuation times as much as possible, preserving ground deployment of sufficiently trained medics and medical teams, optimization of transfusion strategies, and strengthening specific prolonged field care equipment and training.

Use of Shock Index to Identify Mild Hemorrhage: An Observational Study in Military Blood Donors

Introduction:

Hemorrhage is the leading cause of preventable death in combat, although early recognition of hemorrhage is still challenging on the battlefield.

Hypothesis/Problem:

The objective of this study was to describe the shock index (SI) in a healthy military population, and to measure its variation during a controlled blood loss, simulated by blood donation.

Methods:

A prospective observational study that enrolled military subjects, volunteers for blood donation, was conducted. Demographic and clinical information, concerning both the patient and the blood collection, were recorded. Baseline vital signs were measured, before and after donation, in a 45° supine position. Statistical analysis was performed after calculation of SI.

Results:

A total of 483 participants were included in the study. The mean blood donation volume was 473mL (SD = 44mL). The median pre- and post-blood donation SI were significantly different: 0.54 (IQR = 0.48-0.63) and 0.57 (IQR = 0.49-0.66), respectively (P = .002). Changes in pre-/post-donation blood pressure (BP) and heart rate (HR) also reached statistical difference but represented a clinically poor relevance. The multivariate analysis showed no significant associations between SI variations and age, sex, body mass index (BMI), sport activities, blood donation volume, and enteral volume replacement (EVR).

Conclusion:

In this model of mild hemorrhage, SI exhibited significant variations but failed to reach clinical relevance. Further studies are needed to prove the benefit of SI calculation as a possible parameter for early recognition of hemorrhage in combat casualties at the point of injury.

Pasquier P, Duron S, Pouget T, Carbonnel AC, Boutonnet M, Malgras B, Barbier O, de Saint Maurice G, Sailliol A, Ausset S, Martinaud C. Use of shock index to identify mild hemorrhage: an observational study in military blood donors. Prehosp Disaster Med. 2019;34(3):303–307.

Late immune consequences of combat trauma: a review of trauma-related immune dysfunction and potential therapies

With improvements in personnel and vehicular body armor, robust casualty evacuation capabilities, and damage control resuscitation strategies, more combat casualties are surviving to reach higher levels of care throughout the casualty evacuation system. As such, medical centers are becoming more accustomed to managing the deleterious late consequences of combat trauma related to the dysregulation of the immune system. In this review, we aim to highlight these late consequences and identify areas for future research and therapeutic strategies. Trauma leads to the dysregulation of both the innate and adaptive immune responses, which places the injured at risk for several late consequences, including delayed wound healing, late onset sepsis and infection, multi-organ dysfunction syndrome, and acute respiratory distress syndrome, which are significant for their association with the increased morbidity and mortality of wounded personnel. The mechanisms by which these consequences develop are complex but include an imbalance of the immune system leading to robust inflammatory responses, triggered by the presence of damage-associated molecules and other immune-modifying agents following trauma. Treatment strategies to improve outcomes have been difficult to develop as the immunophenotype of injured personnel following trauma is variable, fluid and difficult to determine. As more information regarding the triggers that lead to immune dysfunction following trauma is elucidated, it may be possible to identify the immunophenotype of injured personnel and provide targeted treatments to reduce the late consequences of trauma, which are known to lead to significant morbidity and mortality.

Novel approach for automating medical emergency protocol in military environment

BACKGROUND AND OBJECTIVES

Categorization of the casualties in accordance with medical care priorities is crucial in a military environment. Automation of the triage process is still a challenging task. The goal of the paper is to propose a novel algorithm for automation of medical emergency protocol in the military environment by the creation of classifiers that can provide accurate prioritization of injured soldier cases. It is a part of a complex military telemedicine system that provides continuous monitoring of soldiers' vital data gathered on-site using an unobtrusive set of sensors.

METHODS

After pre-processing the collected raw physiological data and eliminating the outliers using Naïve Bayesian Classifier, the system is capable of calculating the risk level and categorizing the victims based on Markov Decision Process. The NBC has been trained with a dataset that has contained labels and 6 features. Training set has held 8000 randomly chosen samples. Twenty percent of the determined dataset has been used for the validation set.

RESULTS

For algorithm verification, several evaluation scenarios have been created. In each scenario, randomly generated vital sign data describing the hypothetical health condition of soldiers was contemporarily assessed by the system as well as by 50 experienced military medical physicians.

CONCLUSION

The obtained correlation result of the proposed algorithm and medical physicians' classifications is strong evidence that the system can be implemented in warfare emergency medicine.

Expert consensus on the evaluation and diagnosis of combat injuries of the Chinese People's Liberation Army

The accurate assessment and diagnosis of combat injuries are the basis for triage and treatment of combat casualties. A consensus on the assessment and diagnosis of combat injuries was made and discussed at the second annual meeting of the Professional Committee on Disaster Medicine of the Chinese People's Liberation Army (PLA). In this consensus agreement, the massive hemorrhage, airway, respiration, circulation and hypothermia (MARCH) algorithm, which is a simple triage and rapid treatment and field triage score, was recommended to assess combat casualties during the first-aid stage, whereas the abbreviated scoring method for combat casualty and the MARCH algorithm were recommended to assess combat casualties in level II facilities. In level III facilities, combined measures, including a history inquiry, thorough physical examination, laboratory examination, X-ray, and ultrasound examination, were recommended for the diagnosis of combat casualties. In addition, corresponding methods were recommended for the recognition of casualties needing massive transfusions, assessment of firearm wounds, evaluation of mangled extremities, and assessment of injury severity in this consensus.