Publications by authors named "Guyon Hill"

Background: Military helicopter mishaps frequently lead to multiple casualty events with complex injury patterns. Data specific to this mechanism of injury in the deployed setting are limited. We describe injury patterns associated with helicopter crashes.

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Units within the Special Operations Forces (SOF) community require medically competent and operationally proficient medical providers (physicians, physician assistants, and nurse practitioners, among others) to support complex mission sets. The expectations placed on providers who successfully assess for and are selected into these units are high. These providers are not only expected to be experts in their respective subspecialities, but also to serve as staff officers, provide medical direction for SOF medics, serve as medical advisors to the command team, and provide direct medical support for kinetic operations.

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As the landscape and resources of combat operations change and become more unpredictable, the ability to provide prolonged combat casualty care in austere environments will become increasingly important. Prolonged casualty care (PCC) (until recently, prolonged field care [PFC]) is an emerging niche of military medicine that requires specific and dedicated training within our military medical education curricula for providers at all levels. That training should incorporate both didactic classroom instruction and high-fidelity, hands-on, full-scale training in order to prepare providers for delivering care beyond the standard doctrinal timelines employed in recent combat operations.

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Background: Based on isolated case reports, military helicopter mishaps often result in multiple critical casualties leading to complicated stabilization and evacuation by healthcare providers. The aim of this retrospective descriptive analysis is to describe the incidence of common prehospital injuries associated with rotary wing crashes in order to improve mission planning and casualty survivability.

Methods: This is a secondary analysis of data from the Prehospital Trauma Registry and the Department of Defense Trauma Registry (DoDTR) from April 2003 through May 2019.

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Background: Hemorrhage is one of the leading causes of preventable death in both military and civilian trauma. Implementation of items such as tourniquets and hemostatic dressings are helpful in controlling hemorrhage and increasing the survival rate of casualties when such injuries occur. Prehospital blood transfusions are used to treat patients with severe injuries where the standard methods of hemorrhage control are not an effective form of treatment.

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Background: Infectious complications of war wounds are a significant source of mortality and morbidity. Tactical Combat Casualty Care (TCCC) guidelines recommend prehospital moxifloxacin, ertapenem, or cefotetan for "all open combat wounds." We describe the prehospital administration of antibiotics to pediatric trauma patients.

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Background: Existing data on pediatric massive transfusion as part of trauma resuscitation is limited. We report the characteristics of pediatric casualties associated with undergoing massive transfusion at US military treatment facilities during combat operations in Iraq and Afghanistan.

Methods: We queried the Department of Defense Trauma Registry (DODTR) for all pediatric subjects admitted to US and Coalition fixed-facility hospitals in Iraq and Afghanistan from January 2007 to January 2016.

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Background: Mounting evidence suggests hyperoxia therapy may be harmful. We describe injury characteristics and survival outcomes for pediatric trauma casualties in Iraq and Afghanistan, stratified by partial pressure of arterial oxygen (PaO2). Secondarily, we performed subgroup analyses for severe traumatic brain injury (TBI) and massive transfusion of blood products (MT).

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Traumatic injuries were the most common reason for pediatric admission to military hospitals during the recent wars in the Middle East. We describe injury characteristics and prehospital interventions performed on wartime pediatric trauma casualties in Afghanistan and Iraq, stratified by medical evacuation platform. We queried the Department of Defense Trauma Registry (DODTR) for all pediatric (age < 18 years) encounters from January 2007 to January 2016.

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Objective: Military providers frequently treat civilians, including pediatric patients. Cervical spine injuries in pediatric trauma patients occur infrequently, with limited data on the incidence. The aim of this study was to describe the incidence of cervical spine injuries in pediatric patients in Iraq and Afghanistan.

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Background: Vascular access in critically ill pediatric patients can be challenging with delays potentially leading to worse outcomes. Intraosseous (IO) access has a low rate of complications and can be utilized to administer lifesaving medications. Combat medics are trained to treat adults but may also be required to treat children in the deployed setting.

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Background: Head injuries frequently occur in combat. Tactical Combat Casualty Care (TCCC) guidelines recommend pre-hospital use of ketamine for analgesia. Yet the use of this medication in patients with head injuries remains controversial, particularly among pediatric patients.

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Objectives: Pediatric casualties made up a significant proportion of patients during the recent military conflicts in Iraq and Afghanistan. Damage control resuscitation strategies used by military physicians included rapid reversal of metabolic acidosis to mitigate its pathophysiologic consequences, primarily through hemorrhage control and volume restoration. Alkalizing agents, including tris(hydroxymethyl)aminomethane (THAM), are potential therapeutic adjuncts to treat significant acidosis.

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Background: United States (US) and coalition military medical units deployed to combat zones frequently encounter pediatric trauma patients. Pediatric patients may present unique challenges due to their anatomical and physiological characteristics and most military prehospital providers lack pediatric-specific training. A minimal amount of data exists to illuminate the prehospital care of pediatric patients in this environment.

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Background: Previous studies have evaluated prehospital analgesia during combat operations in Iraq and Afghanistan, but were limited to the adult population. However, a significant portion of the casualties of those conflicts were children. We describe the prehospital analgesia administered to wartime pediatric trauma patients.

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Background: Combat zone trauma poses a unique set of challenges and injury patterns not seen in the civilian setting. The role of the pediatric resuscitative thoracotomy in combat zones remains unclear given a paucity of data regarding procedure outcomes in this setting. We compare outcomes among children in traumatic arrest undergoing resuscitative thoracotomy versus cardiopulmonary (CPR) resuscitation only.

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Background: Military hospital healthcare providers treated children during the recent conflicts in Afghanistan and Iraq. Compared to adults, pediatric patients present unique challenges during trauma resuscitations and have notably been discussed in few research reports. We seek to describe ED interventions performed on pediatric trauma patients in Iraq and Afghanistan.

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Background: Military hospitals in Iraq and Afghanistan treated children with traumatic injuries during the recent conflicts. Diagnostic imaging is an integral component of trauma management; however, few published data exist on its use in the wartime pediatric population.

Objective: The authors describe the emergency department (ED) utilization of radiology resources for pediatric trauma patients in Iraq and Afghanistan.

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Introduction: Airway compromise is the second leading cause of preventable death on the battlefield among US military casualties. Airway management is an important component of pediatric trauma care. Yet, intubation is a challenging skill with which many prehospital providers have limited pediatric experience.

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Special Operations medical provider must be familiar with the differential diagnosis for a patient with altered mental status since it includes multiple life-threatening illnesses. Potential diagnoses include meningitis, encephalitis, malaria and many others. While preparing to evacuate to definitive care from an austere location, they must also be prepared to initiate empiric therapy that is specific to the patient and the area of operations.

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Glucose-6-phosphate dehydrogenase (G6PD) deficiency is the most prevalent human enzyme deficiency, affecting an estimated 400 million people worldwide. G6PD deficiency increases erythrocyte vulnerability to oxidative stress and may precipitate episodes of hemolysis when individuals are exposed to triggering agents. Although central retinal vein occlusion (CRVO) does occur in G6PD-deficient individuals, G6PD-deficient individuals exposed to oxidative stressors have not been previously reported to have an increase in CRVO incidence.

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Glucose-6-phosphate dehydrogenase (G6PD) deficiency is the most prevalent human enzyme deficiency, affecting an estimated 400 million people worldwide. G6PD deficiency increases erythrocyte vulnerability to oxidative stress and may precipitate episodes of hemolysis when individuals are exposed to triggering agents. Although central retinal vein occlusion (CRVO) does occur in G6PD-deficient individuals, G6PD-deficient individuals exposed to oxidative stressors have not been previously reported to have an increase in CRVO incidence.

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