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The Role of Magnetic Resonance Imaging in Optimizing Injury Management in Air Force Pararescuemen, Combat Rescue Officers, and Survival Specialists

Rush SC, Foresto C, Hewitt CW, Grossman MG, Petersen CD, Gallo I, Staak BP, Rush JT 18(2). 86 - 89 (Journal Article)

Operators perform physically demanding jobs associated with a variety of overuse and acute musculoskeletal injuries. The current management of musculoskeletal complaints in the Air Force includes plane radiographs and 6 weeks of physical therapy (PT) before consideration of orthopedic consultation and magnetic resonance imaging (MRI); however, MRI shows a clear advantage compared with plane radiographs. We conducted a performance improvement project and conclude that (1) MRI allowed for definitive diagnosis as well as definitive triage for care in a timely manner, (2) guidelines for ordering lumbosacral MRIs should be followed and not ordered for pain that is not progressive and severe or not associated with a neurological finding, and (3) because of the risk of X-ray exposure in patients in their 20 and 30s, X-rays should be avoided in this setting unless definitely indicated.

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Junctional Tourniquet Use During Combat Operations in Afghanistan: The Prehospital Trauma Registry Experience

Schauer SG, April MD, Fisher AD, Cunningham CW, Gurney J 18(2). 71 - 74 (Journal Article)

Background: Hemorrhage is the leading cause of potentially preventable death on the battlefield. Although the resurgence of limb tourniquets revolutionized hemorrhage control in combat casualties in the recent conflicts, the mortality rate for patients with junctional hemorrhage is still high. Junctional tourniquets (JTQs) offer a mechanism to address the high mortality rate. The success of these devices in the combat setting is unclear given a dearth of existing data. Methods: From the Prehospital Trauma Registry (PHTR) and the Department of Defense Trauma Registry, we extracted cases of JTQ use in Afghanistan. Results: We identified 13 uses of a JTQ. We excluded one case in which an improvised pelvic binder was used. Of the remaining 12 cases of JTQ use, seven had documented success of hemorrhage control, three failed to control hemorrhage, and two were missing documentation regarding success or failure. Conclusion: We report 12 cases of prehospital use of JTQ in Afghanistan. The findings from this case series suggest these devices may have some utility in achieving hemorrhage control strictly at junctional sites (e.g., inguinal creases). However, they also highlight device limitations. This analysis demonstrates the need for continued improvements in technologies for junctional hemorrhage control, prehospital documentation, data fidelity and collection, as well as training and sustainment of the training for utilization of prehospital hemorrhage control techniques.

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Optimizing Tactical Medical Performance: The Effect of Light Hue on Vision Testing

Van Buren JP, Wake J, McLaughlin J, LaPorta AJ, Enzenauer RW, Calvano CJ 18(2). 75 - 78 (Journal Article)

Background: Red and blue are the historical tactical lighting hues of choice to ensure light discipline and to preserve dark adaptation. As yet, no scientifically ideal hue for use in Special Operations medicine has been identified. We propose red/green polychromatic light as a superior choice that preserves visual function for tactical medical tasks in austere settings. Methods: Thirty participants were enrolled in this institutional review board-approved study. Participants completed four vision tasks in low-light settings under various lighting conditions. The Pelli-Robson Near Contrast Sensitivity test (PR), tumbling E visual acuity test, Farnsworth D-15 color-vision test (FD15), and pseudoisochromatic plate (PiP) testing was performed under white, green, or red light illumination and also red/green and red/green/yellow lights. PR and tumbling E tests were performed using blue and blue/red lights. Results: The test results for each light were compared against a white-light standard. Contrast sensitivity as measured by PR testing showed no statistical difference when white light was used compared with red/green or red/green/yellow light, and the differences between red, green, blue, and blue/red all were statistically different from when white light was used. When measuring visual acuity, blue light was the only color for which there was a statistically significant decrease in visual acuity in comparison with white. There was no reduction in visual acuity with any other lights compared with white. Performance on FD15 testing with all single-hue and multihue lights was significantly worse than with white light for measuring color-vision perception. Color discrimination as measured by PiP testing showed red and green light was significantly worse than with white light, whereas test results when green/red and green/red/yellow lights were used were not statistically different from white. Conclusion: Red/Green/yellow and red/green were superior light sources and performance results only were worse than white light on FD15 testing.

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Special Operations Force Risk Reduction: Integration of Expeditionary Surgical and Resuscitation Teams

Satterly S, McGrane O, Frawley T, Bynum W, Martin J, Clegg C, Pearsall N, Reilly S, Verwiebe E, Eckert M 18(2). 49 - 52 (Journal Article)

Hemorrhage in the presurgical setting has been the most significant cause of death on the battlefield. Damage control surgery (DCS) near the point of injury (POI) is not a new concept, but having conventional medical teams supporting Special Operations Forces (SOF) beyond robust military medical infrastructure is unique for the US military. The Expeditionary Resuscitative Surgical Team (ERST) was formed by the US Army Medical Command as a pilot team to fulfill a request for forces to provide DCS and personnel recovery near POI.

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Evaluation of the US Army Special Forces Tactical Human Optimization, Rapid Rehabilitation, and Reconditioning Program

Grier T, Anderson MK, Depenbrock P, Eiserman R, Nindl BC, Jones BH 18(2). 42 - 48 (Journal Article)

Background: We sought to assess the rehabilitation process, training, performance, and injury rates among those participating and not participating in the Tactical Human Optimization, Rapid Rehabilitation, and Reconditioning (THOR3) program and determine injury risk factors. Methods: A survey inquiring about personal characteristics, injuries, physical performance, and THOR3 participation during the previous 12 months was administered to Army Special Operations Forces (SOF) Soldiers. Based on responses to physical training, Soldiers were categorized into three groups: a traditional physical training (TPT) group, a cross-training (CT) group, and a THOR3 group. To identify potential injury risk factors, risk ratios and 95% confidence intervals (95% CIs) were calculated. Backward- stepping multivariable logistic regression models were used to assess key factors associated with injury risk. Results: The survey was completed by 328 male Soldiers. Most of the Soldiers (62%) who scheduled an appointment with the physical therapist were seen within 1 day. Self-reported injury rates for the TPT, CT, and THOR3 groups were 70%, 52%, and 48%, respectively. When controlling for personal characteristics, unit training, and fitness, the TPT group had a marginally higher risk of being injured than the THOR3 group (odds ratio [OR], 2.72; 95% CI, 0.86-8.59; p = .09). Soldiers who did not perform any unit resistance training (ORnone/90-160 min, 3.62; 95% CI, 1.05-12.53; p = .04) or the greatest amount of resistance training (OR>160 min/90-160 min, 3.44; 95% CI, 1.64-7.20; p < .01) were more likely to experience an injury than the moderate-resistance training group. Conclusion: THOR3 appears to offer human performance optimization/injury prevention advantages over other SOF human performance programs.

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New and Established Models of Limb Tourniquet Compared in Simulated First Aid

Kragh JF, Newton NJ, Tan AR, Aden JK, Dubick MA 18(2). 36 - 41 (Journal Article)

Background: The performance of a new tourniquet model was compared with that of an established model in simulated first aid. Methods: Four users applied the Combat Application Tourniquet (C-A-T), an established model that served as the control tourniquet, and the new SAM Extremity Tourniquet (SXT) model, which was the study tourniquet. Results: The performance of the C-A-T was better than that of the SXT for seven measured parameters versus two, respectively; metrics were statistically tied 12 times. The degree of difference, when present, was often small. For pretime, a period of uncontrolled bleeding from the start to a time point when the tourniquet first contacts the manikin, the bleeding rate was uncontrolled at approximately 10.4mL/s, and for an overall average of 39 seconds of pretime, 406mL of blood loss was calculated. The mean time to determination of bleeding control (± standard deviation [SD]) was 66 seconds (SXT, 70 ± 30 seconds; C-A-T, 62 ± 18 seconds; p = .0075). The mean ease-of-use score was 4 (indicating easy) on a scale of 1 to 5, with 5 indicating very easy (mean ± SD: SXT, 4 ± 1; C-A-T, 5 ± 0; p < .0001). C-A-T also performed better for total trial time, manikin damage, blood loss rate, pressure, and composite score. SXT was better for pretime and unwrap time. All users intuitively self-selected the speed at which they applied the tourniquets and that speed was similar in all of the required steps. However, by time segments, one user went slowest in each segment while the other three generally went faster. Conclusions: In simulated first aid with tourniquets, better results generally were seen with the C-A-T than with the SXT in terms of performance metrics. However, the degree of difference, when present, was often small.

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Management of Suspected Tension Pneumothorax in Tactical Combat Casualty Care: TCCC Guidelines Change 17-02

Butler FK, Holcomb JB, Shackelford S, Montgomery HR, Anderson S, Cain JS, Champion HR, Cunningham CW, Dorlac WC, Drew B, Edwards K, Gandy JV, Glassberg E, Gurney J, Harcke T, Jenkins DA, Johannigman J, Kheirabadi BS, Kotwal RS, Littlejohn LF, Martin M, Mazuchowski EL, Otten EJ, Polk T, Rhee P, Seery JM, Stockinger Z, Torrisi J, Yitzak A, Zafren K, Zietlow SP 18(2). 19 - 35 (Journal Article)

This change to the Tactical Combat Casualty Care (TCCC) Guidelines that updates the recommendations for management of suspected tension pneumothorax for combat casualties in the prehospital setting does the following things: (1) Continues the aggressive approach to suspecting and treating tension pneumothorax based on mechanism of injury and respiratory distress that TCCC has advocated for in the past, as opposed to waiting until shock develops as a result of the tension pneumothorax before treating. The new wording does, however, emphasize that shock and cardiac arrest may ensue if the tension pneumothorax is not treated promptly. (2) Adds additional emphasis to the importance of the current TCCC recommendation to perform needle decompression (NDC) on both sides of the chest on a combat casualty with torso trauma who suffers a traumatic cardiac arrest before reaching a medical treatment facility. (3) Adds a 10-gauge, 3.25-in needle/ catheter unit as an alternative to the previously recommended 14-gauge, 3.25-in needle/catheter unit as recommended devices for needle decompression. (4) Designates the location at which NDC should be performed as either the lateral site (fifth intercostal space [ICS] at the anterior axillary line [AAL]) or the anterior site (second ICS at the midclavicular line [MCL]). For the reasons enumerated in the body of the change report, participants on the 14 December 2017 TCCC Working Group teleconference favored including both potential sites for NDC without specifying a preferred site. (5) Adds two key elements to the description of the NDC procedure: insert the needle/ catheter unit at a perpendicular angle to the chest wall all the way to the hub, then hold the needle/catheter unit in place for 5 to 10 seconds before removing the needle in order to allow for full decompression of the pleural space to occur. (6) Defines what constitutes a successful NDC, using specific metrics such as: an observed hiss of air escaping from the chest during the NDC procedure; a decrease in respiratory distress; an increase in hemoglobin oxygen saturation; and/or an improvement in signs of shock that may be present. (7) Recommends that only two needle decompressions be attempted before continuing on to the "Circulation" portion of the TCCC Guidelines. After two NDCs have been performed, the combat medical provider should proceed to the fourth element in the "MARCH" algorithm and evaluate/treat the casualty for shock as outlined in the Circulation section of the TCCC Guidelines. Eastridge's landmark 2012 report documented that noncompressible hemorrhage caused many more combat fatalities than tension pneumothorax.1 Since the manifestations of hemorrhagic shock and shock from tension pneumothorax may be similar, the TCCC Guidelines now recommend proceeding to treatment for hemorrhagic shock (when present) after two NDCs have been performed. (8) Adds a paragraph to the end of the Circulation section of the TCCC Guidelines that calls for consideration of untreated tension pneumothorax as a potential cause for shock that has not responded to fluid resuscitation. This is an important aspect of treating shock in combat casualties that was not presently addressed in the TCCC Guidelines. (9) Adds finger thoracostomy (simple thoracostomy) and chest tubes as additional treatment options to treat suspected tension pneumothorax when further treatment is deemed necessary after two unsuccessful NDC attempts-if the combat medical provider has the skills, experience, and authorizations to perform these advanced interventions and the casualty is in shock. These two more invasive procedures are recommended only when the casualty is in refractory shock, not as the initial treatment.

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A Case of Rhabdomyolysis Caused by Blood Flow-Restricted Resistance Training

Krieger J, Sims D, Wolterstorff C 18(2). 16 - 17 (Case Reports)

Blood flow-restricted resistance (BFRR) training is effective as a means to improve muscle strength and size while enduring less mechanical stress. It is generally safe but can have adverse effects. We present a case of an active duty Soldier who developed rhabdomyolysis as a result of a single course of BFRR training. He was presented to the emergency department with bilateral lower extremity pain, was admitted for electrolyte monitoring and rehydration, and had an uncomplicated hospital course and full recovery. This is an increasingly common mode of rehabilitation in the military, and practitioners and providers should be aware of it and its possible adverse effects.

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A Comparison of Ventilation Rates Between a Standard Bag-Valve-Mask and a New Design in a Prehospital Setting During Training Simulations

Costello JT, Allen PB, Levesque R 17(3). 59 - 63 (Journal Article)

Background: Excessive ventilation of sick and injured patients is associated with increased morbidity and mortality. Combat Medical Systems® (CMS) is developing a new bag-valve-mask (BVM) designed to limit ventilation rates. The purpose of this study was to compare ventilation rates between a standard BVM device and the CMS device. Methods: This was a prospective, observational, semirandomized, crossover study using Army Medics. Data were collected during Brigade Combat Team Trauma Training classes at Camp Bullis, Texas. Subjects were observed during manikin simulation training in classroom and field environments, with total duration of manual ventilation and number of breaths given recorded for each device. Analysis was performed on overall ventilation rate in breaths per minute (BPM) and also by grouping the subjects by ventilation rates in low, correct, and high groups based on an ideal rate of 10-12 BPM. Results: A total of 89 Medics were enrolled and completed the classroom portion of the study, with a subset of 36 evaluated in the field. A small but statistically significant difference in overall BPM between devices was seen in the classroom (ρ < .001) but not in the field (ρ >.05). The study device significantly decreased the incidence of high ventilation rates when compared by groups in both the classroom (ρ < .001) and the field (ρ = .044), but it also increased the rate of low ventilation rates. Conclusion: The study device effectively reduced rates of excessive ventilation in the classroom and the field.

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Prehospital Administration of Tranexamic Acid by Ground Forces in Afghanistan: The Prehospital Trauma Registry Experience

Schauer SG, April MD, Naylor JF, Wiese J, Ryan KL, Fisher AD, Cunningham CW, Mitchell N, Antonacci MA 17(3). 55 - 58 (Journal Article)

Background: Tranexamic acid (TXA) was shown to reduce overall mortality and death secondary to hemorrhage in a large prospective study. This intervention is time sensitive. As such, the Tactical Combat Casualty Care (TCCC) guidelines recommend use of this low-cost, safe intervention among patients with possible hemorrhagic shock, penetrating trauma to the thorax or trunk, or extremity amputation. Objective: Prehospital administration of TXA by ground forces in the Afghanistan combat theater is described. Methods: We obtained data from the Prehospital Trauma Registry. We searched for all patients with documented hypotension, amputation, or penetrating trauma to the torso. Results: From January 2013 to September 2014, there were 272 patients who met inclusion criteria. Most injuries (97.8%; n = 266) were battle injuries. Of the 272 patients who met criteria to receive prehospital TXA, 51 (18.8%) received TXA, whereas the remaining 221 (81.2%) did not. Higher proportions of patients receiving TXA versus patients not receiving TXA received hemostatic dressings, pressure dressings, and tourniquet placement. Conversely, the proportion of patients receiving intravenous fluids was higher in the no-TXA group. Conclusion: Overall, proportions of eligible patients receiving TXA were low despite emphasis in the guidelines. The reasons for this low adherence to TCCC guidelines are likely multifactorial. Future research should seek to identify reasons TXA is not given when indicated and to develop training and technology to increase prehospital TXA administration.

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Estimation of Dog-Bite Risk and Related Morbidity Among Personnel Working With Military Dogs

Schermann H, Eiges N, Sabag A, Kazum E, Albagli A, Salai M, Shlaifer A 17(3). 51 - 54 (Journal Article)

Background: Soldiers serving in the Israel Defense Force Military Working Dogs (MWD) Unit spend many hours taming dogs' special skills, taking them on combat missions, and performing various dogkeeping activities. During this intensive work with the aggressive military dogs, bites are common, and some of them result in permanent disability. However, this phenomenon has not been quantified or reported as an occupational hazard. Methods: This was a retrospective cohort study based on self-administered questionnaires. Information was collected about soldiers' baseline demographics, duration of the experience of working with dogs, total number of bites they had, circumstances of bite events, and complications and medical treatment of each bite. Bite risk was quantified by incidence, mean time to first bite, and a Cox proportional hazards model. Rates of complications and the medical burden of bites were compared between combat soldiers and noncombat dogkeepers. Bite locations were presented graphically. Results: Seventy-eight soldiers participated and reported on 139 bites. Mean time of working with dogs was 16 months (standard deviation, ±9.4 months). Overall bite incidence was 11 bites per 100 person-months; the mean time to first bite event was 6.3 months. The Cox proportional hazards model showed that none of baseline characteristics significantly increased bite hazard. About 90% of bites occurred during routine activities, and 3.3% occurred on combat missions. Only in 9% of bite events did soldiers observed the safety precautions code. Bite complications included fractures, need for intravenous antibiotic treatment and surgical repair, prominent scarring, diminished sensation, and stiffness of proximal joints. Bite complications were similar between combat soldiers and dogkeepers. Most bites (57%) were located on hands and arms. Conclusion: MWD bites are an occupational hazard resulting in significant medical burden. Hands and arms were most common bite locations. Observance of safety precautions may be the most appropriate first-line preventive intervention. Barrier protection of upper extremities may reduce bite severity and complication rates.

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The Golden Hour Offset Surgical Treatment Team Operational Concept: Experience of the 102nd Forward Surgical Team in Operation Freedom's Sentinel 2015-2016

Benavides JM, Benavides LC, Hale DF, Lundy JB 17(3). 46 - 50 (Journal Article)

Theater Special Operations Force (SOF) medical planners have begun using Army Forward Surgical Teams (FSTs) to maintain a golden hour for U.S. SOF during Operation Freedom's Sentinel required adaptation in FST training, configuration, personnel, equipment, and employment to form Golden Hour Offset Surgical Treatment Teams (GHOST-Ts). This article describes one such FST's experience in Operation Freedom's Sentinel while deployed for 9 months in support of SOF in southern Afghanistan.

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Surgical Instrument Sets for Special Operations Expeditionary Surgical Teams

Hale DF, Sexton JC, Benavides LC, Benavides JM, Lundy JB 17(3). 40 - 45 (Journal Article)

Background: The deployment of surgical assets has been driven by mission demands throughout years of military operations in Iraq and Afghanistan. The transition to the highly expeditious Golden Hour Offset Surgical Transport Team (GHOST- T) now offers highly mobile surgical assets in nontraditional operating rooms; the content of the surgical instrument sets has also transformed to accommodate this change. Methods: The 102nd Forward Surgical Team (FST) was attached to Special Operations assigned to southern Afghanistan from June 2015 to March 2016. The focus was to decrease overall size and weight of FST instrument sets without decreasing surgical capability of the GHOST-T. Each instrument set was evaluated and modified to include essential instruments to perform damage control surgery. Results: The overall number of main instrument sets was decreased from eight to four; simplified augmentation sets have been added, which expand the capabilities of any main set. The overall size was decreased by 40% and overall weight decreased by 58%. The cardiothoracic, thoracotomy, and emergency thoracotomy trays were condensed to thoracic set. The orthopedic and amputation sets were replaced with an augmentation set of a prepackaged orthopedic external fixator set). An augmentation set to the major or minor basic sets, specifically for vascular injuries, was created. Conclusion: Through the reorganization of conventional FST surgical instrument sets to maintain damage control capabilities and mobility, the 102nd GHOST-T reduced surgical equipment volume and weight, providing a lesson learned for future surgical teams operating in austere environments.

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Combat Trousers as Effective Improvised Pelvic Binders A Comparative Cadaveric Study

Loftus A, Morris R, Friedmann Y, Pallister I, Parker P 17(3). 35 - 39 (Journal Article)

Background: Improvised explosive devices and landmines can cause pelvic fractures, which, in turn, can produce catastrophic hemorrhage. This cadaveric study compared the intrapelvic pressure changes that occurred with the application of an improvised pelvic binder adapted from the combat trousers worn by British military personnel with the commercially available trauma pelvic orthotic device (TPOD). Methods: Six unembalmed cadavers (three male, three female) were used to simulate an unstable pelvic fracture with complete disruption of the posterior arch (AO/OTA 61-C1) by dividing the pelvic ring anteriorly and posteriorly. A 3-4cm manometric balloon filled with water was placed in the retropubic space and connected to a 50mL syringe and water manometer via a three-way tap. A baseline pressure of 8cm H2O (average central venous pressure) was set. The combat trouser binder (CTB) and TPOD were applied to each cadaver in a random sequence and the steady intrapelvic pressure changes were recorded. Statistical analysis was performed using the Wilcoxon rank-sum test and a paired t test depending on the normality of the data to determine impact on the intrapelvic pressure of each intervention compared with baseline. Results: The median steady intrapelvic pressure achieved after application of the CTB was 16cm H2O and after application of the TPOD binder was 18cm H2O, both of which were significantly greater than the baseline pressure (ρ < .01 and .036, respectively) but not significantly different from each other (ρ >.05). Conclusion: Pelvic injuries are increasingly common in modern theaters of war. The CTB is a novel, rapidly deployable, yet effective, method of pelvic binding adapted from the clothes the casualty is already wearing. This technique may be used in austere environments to tamponade and control intrapelvic hemorrhage.

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Unwrapping a First Aid Tourniquet From Its Plastic Wrapper With and Without Gloves Worn: A Preliminary Study

Kragh JF, Aden JK, Lambert CD, Moore VK, Dubick MA 17(3). 25 - 34 (Journal Article)

Background: The purpose of this study was to gather data about unwrapping a packaged limb tourniquet from its plastic wrapper while wearing different types of gloves. Because already unwrapped tourniquets require no time to unwrap, unwrapping data may provide insights into the issue of having tourniquets unwrapped when stowed in a first aid kit of a Serviceperson at war. Materials and Methods: In a laboratory setting, 36 tests of nine glove groups were performed in which four people, gloved and ungloved, unwrapped tourniquets. Other tourniquets were environmentally exposed for 3 months. Results: All the users successfully unwrapped each tourniquet. Mean times to unwrap by glove group were not significantly different (ρ = .0961). When mean values of eight experimental groups were compared with that of one control group (i.e., bare hands), results showed no significant difference (ρ >.07). Mean time was least for bare hands (12 seconds) and most for cold gloves layered under mittens (22 seconds). Among the 36 pairwise comparisons of difference between glove group means, after adjustment for multiple comparisons, no comparison was noted to be statistically significant (ρ > .052, all 36 pairs). Glove thickness ranged from 0 mm for bare hands to 2.5 mm for cold gloves layered under mittens. By glove group, the thickness-time association was moderate, as tested by linear regression (R2 = 0.6096). The tourniquets exposed to the environment had evidence of rapid photodegradation due to direct exposure to sunlight. Such exposure also destroyed the wrappers. Conclusion: In a preliminary study, different gloves performed similarly when wearers unwrapped a tourniquet from its wrapper. The tourniquet wrappers gave no visible protection from sunlight, and environmental exposure destroyed the wrappers.

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Use of Acetylsalicylic Acid in the Prehospital Setting for Suspected Acute Ischemic Stroke

Levri JM, Ocon A, Schunk P, Cunningham CW 17(3). 21 - 23 (Journal Article)

Acute ischemic stroke (AIS) treatment guidelines include various recommendations for treatment once the patient arrives at the hospital. Prehospital care recommendations, however, are limited to expeditious transport to a qualified hospital and supportive care. The literature has insufficiently considered prehospital antiplatelet therapy. An otherwise healthy 30-year-old black man presented with headache for about 3 hours, left-sided facial and upper extremity numbness, slurred speech, miosis, lacrimation, and general fatigue and malaise. The presentation occurred at a time and location where appropriate resources to manage potential AIS were limited. The patient received a thorough physical examination and electrocardiogram. Acetylsalicylic acid (ASA) 325mg was administered within 15 minutes of history and examination. A local host-nation ambulance arrived approximately 30 minutes after presentation. The patient's neurologic symptoms had abated by the time the ambulance arrived. The patient did not undergo magnetic resonance imaging (MRI) until 72 hours after being admitted, owing to lack of neurology staff over the weekend. The MRI showed evidence of a left-sided, posteriorinferior cerebellar artery stroke. The patient was then taken to a different hospital, where he received care for his acute stroke. The patient eventually was prescribed a statin, ASA, and an angiotensin-converting enzyme inhibitor. The patient has no lingering symptoms or neurologic deficits.

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Prehospital Cricothyrotomy Kits Used in Combat

Schauer SG, April MD, Cunningham CW, Long AN, Carter R 17(3). 18 - 20 (Case Reports)

Background: Surgical cricothyrotomy remains the only definitive airway management modality for the tactical setting recommended by Tactical Combat Casualty Care guidelines. Some units have fielded commercial cricothyrotomy kits to assist Combat Medics with surgical cricothyrotomy. To our knowledge, no previous publications report data on the use of these kits in combat settings. This series reports the the use of two kits in four patients in the prehospital combat setting. Methods: Using the Department of Defense Trauma Registry and the Prehospital Trauma Registry, we identified four cases of patients who underwent prehospital cricothyrotomy with the use of commercial kits. In the first two cases, a Medic successfully used a North American Rescue CricKit (NARCK) to obtain a surgical airway in a Servicemember with multiple amputations from an improvised explosive device explosion. In case 3, the Medic unsuccessfully used an H&H Medical kit to attempt placement of a surgical airway in a Servicemember shot in the head by small arms fire. A second attempt to place a surgical airway using a NARCK was successful. In case 4, a Soldier sustained a gunshot wound to the chest. A Medic described fluid in the airway precluding bag-valve-mask ventilation; the Medic attempted to place a surgical airway with the H&H kit without success. Conclusion: Four cases of prehospital surgical airway cannulation on the battlefield demonstrated three successful uses of prehospital cricothyrotomy kits. Further research should focus on determining which kits may be most useful in the combat setting.

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Exertional Heat Illness Resulting in Acute Liver Failure and Liver Transplantation

Boni B, Amann C 17(3). 15 - 17 (Case Reports)

Heat illness remains a large medical burden for militaries around the world. Mitigating the incidence as well as the complications of heat illness must remain on the forefront of operational planning when operating in hot environments. We report the case of a 27-year-old male U.S. Marine who sustained a heat-related illness resulting in fulminant liver failure and permanent disability. The patient was transferred from the field to a civilian hospital. On hospital day 5, liver failure was identified. The patient was transferred to a transplant center, where he successfully received a liver transplant.

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"Evita Una Muerte, Esta en Tus Manos" Program: Bystander First Aid Training for Terrorist Attacks

Pajuelo Castro JJ, Meneses Pardo JC, Salinas Casado PL, Hernandez Martin P, Montilla Canet R, del Campo Cuesta JL, Incera Bustio G, Martin Ayuso D 17(4). 133 - 137 (Journal Article)

Background: The latest terrorist attacks in Europe and in the rest of the world, and the military experience in the most recent conflicts leave us with several lessons learned. The most important is that the fate of the wounded rests in the hands of the one who applies the first dressing, because the victims usually die within the first 10 minutes, before professional care providers or police personnel arrive at the scene. A second lesson is that the primary cause of preventable death in these types of incidents involving explosives and firearms is massive hemorraghe. Objective: There is a need to develop a training oriented to citizens so they can identify and use available resources to avoid preventable deaths that occur in this kind of incidents, especially massive hemorrhage. Methods: A 7-hour training intervention program was developed and conducted between January and May 2017. Data were collected from participants' answers on a multiple-choice test before and after undertaking the training. Improved mean score for at least 75% of a group's members on the posttraining test was considered reflective of adequate knowledge. Results: A total of 173 participants (n = 74 men [42.8%]; n = 99 women [57.2%]) attended the training. They were classified into three groups: a group of citizens/ first responders with no prior health training, a group of health professionals, and a group of nursing students. Significant differences (ρ < .05) between mean pre- and post-training test scores occurred in each of the three groups. Conclusion: There was a clear improvement in the knowledge of the students after the training when pre- and post-training test scores were compared within the three groups. The greatest improvement was seen in the citizens/first responders group

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Use of a Tuning Fork for Fracture Evaluation: An Introduction for Education and Exposure

Hetzler MR 17(4). 130 - 132 (Journal Article)

Radiographs, bones scans, and even ultrasound may be rare in the austere or acute environment for the evaluation of suspected musculoskeletal fractures. Having an easy, simple, and confident means of objective evaluation used in conjunction with the patient presentation, history, and physical findings may provide a more efficient and economical means of treatment. This introduction and review of selected literature are meant to provide a fuller understanding and consideration for the methods of using a tuning fork in fracture assessment.

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