Dominique-Jean Larrey: the effects of therapeutic hypothermia and the first ambulance

Dominique-Jean Larrey (1766-1842): The Founder of the Modern Triage System

Dominique-Jean Larrey was a prominent French surgeon who rose to fame during the age of the Napoleonic Wars. During his service in the French military, he developed dozens of medical innovations. Most important of all were his improvements to the evacuation of the wounded from the battlefield, triage of the wounded, and rapid surgical intervention. His innovations revolutionized military medicine and are still the basis for modern practice today.

Focal Cooling for Drug-Resistant Epilepsy: A Review

Importance

Epilepsy affects at least 1.2% of the population, with one-third of cases considered to be drug-resistant epilepsy (DRE). For these cases, focal cooling therapy may be a potential avenue for treatment, offering hope to people with DRE for freedom from seizure. The therapy leverages neuroscience and engineering principles to deliver a reversible treatment unhindered by pharmacology.

Observations

Analogous to (but safer than) the use of global cooling in postcardiac arrest and neonatal ischemic injury, extensive research supports the premise that focal cooling as a long-term treatment for epilepsy could be effective. The potential advantages of focal cooling are trifold: stopping epileptiform discharges, seizures, and status epilepticus safely across species (including humans).

Conclusions and Relevance

This Review presents the most current evidence supporting focal cooling in epilepsy. Cooling has been demonstrated as a potentially safe and effective treatment modality for DRE, although it is not yet ready for use in humans outside of randomized clinical trials. The Review will also offer a brief overview of the technical challenges related to focal cooling in humans, including the optimal device design and cooling parameters.

[The Inventor of the "Triage": Dominique-Jean Larrey (1766-1842), Napoleon's Chief Military Doctor]

During the reign of Emperor Napoleon I, Dominique-Jean Larrey (1766-1842) was chief surgeon in the French army. He has become known as the father of modern military surgery and for the development of the "triage system". Larrey was an outstanding and dedicated physician who provided medical care not only to his own troops but also to those of the enemy. Without reliable analgesia and anaesthesia, speed and skill were the most salient characteristics of a surgeon at that time. Against the opposition of the administration, Larrey is credited with the introduction of first-aid on the battlefield as well as a quick rescue of the wounded with the help of the so-called "flying ambulances". He was considered the soldiers' greatest friend.

Hemorrhagic Resuscitation Guided by Viscoelastography in Far-Forward Combat and Austere Civilian Environments: Goal-Directed Whole-Blood and Blood-Component Therapy Far from the Trauma Center

Modern approaches to resuscitation seek to bring patient interventions as close as possible to the initial trauma. In recent decades, fresh or cold-stored whole blood has gained widespread support in multiple settings as the best first agent in resuscitation after massive blood loss. However, whole blood is not a panacea, and while current guidelines promote continued resuscitation with fixed ratios of blood products, the debate about the optimal resuscitation strategy-especially in austere or challenging environments-is by no means settled. In this narrative review, we give a brief history of military resuscitation and how whole blood became the mainstay of initial resuscitation. We then outline the principles of viscoelastic hemostatic assays as well as their adoption for providing goal-directed blood-component therapy in trauma centers. After summarizing the nascent research on the strengths and limitations of viscoelastic platforms in challenging environmental conditions, we conclude with our vision of how these platforms can be deployed in far-forward combat and austere civilian environments to maximize survival.

The evolution of hypothermia for neuroprotection after cardiac arrest: a history in the making

While much has been observed regarding hypothermia by way of environmental exposure, it is modern day medicine that deployed hypothermia as a therapeutic. From the early 1930s, when Temple Fay deployed "refrigeration" to treat pain, to the work of Wilfred Bigelow and Charles Drew, who utilized hypothermia in open heart surgery-the opportunities seemed endless. However, questions arose surrounding appropriate temperatures to achieve best outcomes and how to minimize adverse events, such as coagulopathy and infection. In the 1980s, hypothermia underwent a resurgence through Peter Safar's critical studies in large animals, which quickly translated into feasibility studies and the landmark trials of 2002 that paved the way for postcardiac arrest care as we currently know it. Through clinical and observational trials, modern-day targeted temperature management continues to adapt, striving to improve patient outcomes. While hypothermia has come a long way from the writings of Hippocrates, the ideal therapy has not yet been defined, and more work is needed. While the history is long, there is more to be written and advances to be achieved as we optimize the neuroprotective effects of hypothermia for comatose survivors of cardiac arrest.

An odyssey of suturing cardiac wounds: Lessons from the past

BACKGROUND AND AIM OF THE STUDY

Cardiac wounds have been described for centuries and still remain to be fatal. For a long period of time, the suturing of a myocardial laceration was thought to be absolutely impossible if not sacrilege.

METHODS

It is only at the end of the 19th century that pioneers decided to defy such a dogma in desperate cases.

RESULTS

Nowadays, it seems obvious that a cardiac stab wound requires emergent surgery whenever possible.

CONCLUSIONS

The story of cardiac wounds highlights nicely the change of mind that is required to accept progress and new procedures in medicine.

Dominique Jean Larrey (1766-1842) and His Contributions to Military Medicine and Early Neurosurgery

Dr. Dominique Jean Larrey was a pioneer in the field of military surgery. His creative innovation and drive to improve the quality of medical services available to those injured during war guided his achievements in medicine. Dr. Larrey has often been referred to as "the father of emergency medical services" and "the father of modern military medicine." His contributions to medicine continue to live on in common procedures and healthcare systems today, such as aspiration of pericardial effusion and drainage of hemothorax and empyema. Based on his own writings, he treated multiple cases of intracranial injury, making him an early, but often forgotten, pioneer of neurosurgery.

Understanding therapeutic hypothermia

Therapeutic hypothermia is a relatively new protocol that can improve patients' chances of favorable neurologic outcomes after cardiac arrest. However, implementation rates remain low nationwide. This article describes recommendations for and benefits of therapeutic hypothermia in postresuscitation care.

A review of the history of the origin of triage from a disaster medicine perspective

We usually associate triage with the Simple Triage and Rapid Treatment method, but much of its origin is still unknown. Therefore, French studies and the origin of triage shown in domestic and foreign published works have been investigated and its significance reaffirmed. The etymology of the word “triage” means “to break into three pieces.” It was suggested by a literature review that the rise of Napoleon led to military tactical changes, and that the prototype of triage arose from the experience gained in the difficult campaign in Egypt and Syria. Subsequently, triage was refined by Napoleon's military surgeon, D. J. Larrey, who created the ambulance transport system. Although there is a clash between the ruthless and philanthropic aspects of triage, triage is in accordance with the primary purpose of evacuation or treatment. We should choose the triage method that is consistent with the purpose of each disaster situation.

Volume infusion cooling increases end-tidal carbon dioxide and results in faster and deeper cooling during intra-cardiopulmonary resuscitation hypothermia induction

Background

Intra-arrest hypothermia induction may provide more benefit than inducing hypothermia after return of spontaneous circulation. However, little is understood about the interaction between patient physiology and hypothermia induction technology choice during ongoing chest compressions.

Methods

After 10 min of untreated ventricular fibrillation, mechanical chest compressions were provided for 60 min (100 CPM, 1.25" deep) in 26 domestic swine (30.5 ± 1.7 kg) with concurrent hypothermia induction using one of eight cooling methods. Four cooling methods included volume infusion with cold saline or an ice particulate slurry through the femoral vein or carotid artery (volume infusion cooling group, VC); three included cooling via an intra-vascular heat exchange catheter, nasal cooling, or surface ice bags (no volume cooling group, NVC); and the other was a control group with no cooling (no cooling group, NC). Physiological monitoring included end-tidal carbon dioxide, aortic pressure, right atrial pressure, brain temperature, esophageal temperature, and rectal temperature.

Results

During cardiopulmonary resuscitation (CPR), the volume infusion cooling group cooled faster and to lower temperatures than the other groups (VC vs. NVC or NC; ∆T = −5.6 vs. −2.1 °C or −0.6 °C; p < 0.01). The aortic pressure and right atrial pressure were higher in the volume cooling group than the other groups (VC vs. NVC or NC; AOP = 23.6 vs. 16.7 mmHg or 14.7 mmHg; p < 0.02). End-tidal carbon dioxide measurements during CPR were also higher in the volume cooling group (VC vs. NVC; EtCO₂ = 23.4 vs. 13.1 mmHg; p < 0.05). Intra-corporeal temperature gradients larger than 3 °C were created by volume cooling during ongoing chest compressions.

Conclusions

Volume infusion cooling significantly altered physiology relative to other cooling methods during ongoing chest compressions. Volume cooling led to faster cooling rates, lower temperatures, higher end-tidal carbon dioxide levels, and higher central vascular pressures.

IACUC protocol numbers: UPenn (803178), CHOP (997)

Research progress on combat trauma treatment in cold regions

Cold regions are a special combat environment in which low temperatures have a great impact on human metabolism and other vital functions, including the nervous, motion, cardiovascular, circulatory, respiratory, and urinary systems; consequently, low temperatures often aggravate existing trauma, leading to high mortality rates if rapid and appropriate treatment is not provided. Hypothermia is an independent risk factor of fatality following combat trauma; therefore, proactive preventative measures are needed to reduce the rate of mortality. After summarizing the basic research on battlefield environments and progress in the prevention and treatment of trauma, this article concludes that current treatment and prevention measures for combat trauma in cold regions are inadequate. Future molecular biology studies are needed to elucidate the mechanisms and relevant cell factors underlying bodily injury caused by cold environment, a research goal will also allow further exploration of corresponding treatments.

Neurosurgical work during the Napoleonic wars: Baron Larrey's experience

OBJECTIVES

Considered as the most famous French military surgeon, Dominique-Jean Larrey (1766-1842), who joined all the campaigns of Napoleon, wrote his memoirs and several medical articles. This paper discusses how in the Napoleonic times, Larrey dealt with neurosurgical diseases or injuries.

PATIENTS AND METHODS

We reviewed four main publications of Larrey published between 1812 and 1838 and analyzed the type of neurosurgical cases presented and their treatment.

RESULTS

These works include his practice of what we call now "neurosurgery" since most injuries described concern the skull or spine. He seemed to treat patients with humanity, integrity and perseverance. Larrey dealt with many aspects of neurosurgery, such as cranial or spinal trauma surgery, and also infectious diseases. He saw many head injuries inflicted not only by muskets or artillery, but also with spears and sabers. Unlike some others, Larrey advocated the use of trepanation in many situations as practiced, for instance, in the treatment of depressed fractures or in presence of subdural collections. On the other hand, this surgeon who saw thousands of amputees during his career did not mention the phantom limb phenomenon in his memoirs. Similarly, the issue of cerebral localizations is only mentioned in his last work, published in 1838.

CONCLUSIONS

In his work, Larrey (and all his contemporaries) dealt essentially with "cranial" surgery, as in skull fractures where the brain could potentially have been injured by bone fragments. The time for brain surgery had not come yet.

Effect of military conflicts on the formation of emergency medical services systems worldwide

OBJECTIVES

This article briefly reviews the evolution of medical support during wars and conflicts from ancient to modern times and discusses the effect warfare has had on the development of civilian health care and emergency medical services (EMS). Medical breakthroughs and discoveries made of necessity during military conflicts have developed into new paradigms of medical care, including novel programs of triage and health assessment, emergency battlefield treatment and stabilization, anesthesia, and other surgical and emergency procedures. The critical role of organizations that provide proper emergency care to help the sick and injured both on the battlefield and in the civilian world is also highlighted.

Investigational therapies for ischemic stroke: neuroprotection and neurorecovery

Stroke is one of the leading causes of death and disability worldwide. Current treatment strategies for ischemic stroke primarily focus on reducing the size of ischemic damage and rescuing dying cells early after occurrence. To date, intravenous recombinant tissue plasminogen activator is the only United States Food and Drug Administration approved therapy for acute ischemic stroke, but its use is limited by a narrow therapeutic window. The pathophysiology of stroke is complex and it involves excitotoxicity mechanisms, inflammatory pathways, oxidative damage, ionic imbalances, apoptosis, angiogenesis, neuroprotection, and neurorestoration. Regeneration of the brain after damage is still active days and even weeks after a stroke occurs, which might provide a second window for treatment. A huge number of neuroprotective agents have been designed to interrupt the ischemic cascade, but therapeutic trials of these agents have yet to show consistent benefit, despite successful preceding animal studies. Several agents of great promise are currently in the middle to late stages of the clinical trial setting and may emerge in routine practice in the near future. In this review, we highlight select pharmacologic and cell-based therapies that are currently in the clinical trial stage for stroke.

Improving prehospital trauma management for skiers and snowboarders - need for on-slope triage?

Background

Injuries from skiing and snowboarding became a major challenge for emergency care providers in Switzerland. In the alpine setting, early assessment of injury and health status is essential for the initiation of adequate means of care and transport. Nevertheless, validated standardized protocols for on-slope triage are missing. This article can assist in understanding the characteristics of injured winter sportsmen and exigencies for future on-slope triage protocols.

Methods

Six-year review of trauma cases in a tertiary trauma centre. Consecutive inclusion of all injured skiers and snowboarders aged >15 (total sample) years with predefined, severe injury to the head, spine, chest, pelvis or abdomen (study sample) presenting at or being transferred to the study hospital. Descriptive analysis of age, gender and injury pattern.

Results

Amongst 729 subjects (total sample) injured from skiing or snowboarding, 401 (55%, 54% of skiers and 58% of snowboarders) suffered from isolated limb injury. Amongst the remaining 328 subjects (study sample), the majority (78%) presented with monotrauma. In the study sample, injury to the head (52%) and spine (43%) was more frequent than injury to the chest (21%), pelvis (8%), and abdomen (5%). The three most frequent injury combinations were head/spine (10% of study sample), head/thorax (9%), and spine/thorax (6%). Fisher's exact test demonstrated an association for injury combinations of head/thorax (p < 0.001), head/abdomen (p = 0.019), and thorax/abdomen (p < 0.001).

Conclusion

The data presented and the findings from previous investigations indicate the need for development of dedicated on-slope triage protocols. Future research must address the validity and practicality of diagnostic on-slope tests for rapid decision making by both professional and lay first responders. Thus, large-scale and detailed injury surveillance is the future research priority.

State of the art in therapeutic hypothermia

Historically, hypothermia was induced prior to surgery to enable procedures with prolonged ischemia, such as open heart surgery and organ transplant. Within the past decade, the efficacy of hypothermia to treat emergency cases of ongoing ischemia such as stroke, myocardial infarction, and cardiac arrest has been studied. Although the exact role of ischemia/reperfusion is unclear clinically, hypothermia holds significant promise for improving outcomes for patients suffering from reperfusion after ischemia. Research has elucidated two distinct windows of opportunity for clinical use of hypothermia. In the early intra-ischemia window, hypothermia modulates abnormal cellular free radical production, poor calcium management, and poor pH management. In the more delayed post-reperfusion window, hypothermia modulates the downstream necrotic, apoptotic, and inflammatory pathways that cause delayed cell death. Improved cooling and monitoring technologies are required to realize the full potential of this therapy. Herein we discuss the current state of clinical practice, clinical trials, recommendations for cooling, and ongoing research on therapeutic hypothermia.