Cutting-Edge Forward Burn Nutrition: from the Battlefield to the Burn Center

Early Enteral Nutrition in Aeromedically Evacuated Critically Ill/Injured Patients With a Resultant Validation Algorithm for the Theater Validating Flight Surgeon

INTRODUCTION

Early enteral feeding in critically ill/injured patients promotes gut integrity and immunocompetence and reduces infections and intensive care unit/hospital stays. Aeromedical evacuation (AE) often takes place concurrently. As a result, AE and early enteral feeding should be inseparable.

MATERIALS AND METHODS

This retrospective descriptive study employed AE enteral nutrition (EN) data (2007-2019) collected from patients who were U.S. citizens and mechanically ventilated. The dataset was created from the En Route Critical Care, Transportation Command Regulating and Command and Control Evacuation System, and Theater Medical Data Store databases. Comparisons were performed between patients extracted and patients not extracted, patients treated with EN and patients treated without EN, and within the EN group, between AE Fed and AE Withheld. The impact of the nutrition support in the Joint Trauma System Clinical Practice Guidelines (CPG) was assessed using the 'before' and 'after' methodology.

RESULTS

An uptick in feeding rates was found after the 2010 CPG, 15% → 17%. With the next two CPG iterations, rates rose significantly, 17% → 48%. Concurrently, AE feeding holds rose significantly, 10% → 24%, later dropping to 17%. In addition, little difference was found between those patients not enterally fed preflight and those enterally fed across collected demographic, mission, and clinical parameters. Likewise, no difference was found between those enterally fed during AE and those withheld. Yet, 83% of the study's patients were not fed, and 18% of those that were fed had feeding withheld for AE.

CONCLUSIONS

It appeared that the Clinical Practice Guidelines (CPGs) reinforced the value of feeding, but may well have sensitized to the threat of aspiration. It also appeared that early enteral feeding was underprescribed and AE feeding withholds were overprescribed. Consequently, an algorithm was devised for the Theater Validating Flight Surgeon, bearing in mind relevant preflight/inflight/clinical issues, with prescriptions designed to boost feeding, diminish AE withholding, and minimize complications.

Enteral Nutrition in the Deployed Critical Care Ground and Air Transport Environment: A Narrative Review

INTRODUCTION

Early and adequate administration of enteral nutrition (EN) improves outcomes in critical care patients. However, the environment where Critical Care Air Transport teams provide patient care poses particular challenges to achieving the same standard of nutritional support readily administered in civilian intensive care units. Providing the highest standard of nutritional care in austere military environments remains the goal for all patients despite inherent challenges. Enteral nutrition, specifically, is not currently a standard of practice in-flight because of concerns for microaspiration and the associated risk of developing ventilator-associated pneumonia. Clinical concern for aspiration combines with the lack of an EN pump approved for use through Safe-to-Fly testing to further decrease the likelihood of initiating EN in trauma patients. Early EN significantly reduces morbidity and mortality risks; therefore, the lack of nutritional support is contrary to established standards of care in civilian intensive care units. Hence, this literature review proposes to provide a clearer understanding of current EN practices as well as any associated risks within the En Route Care system.

METHOD

A narrative review of literature related to EN in military and civilian flight settings using the PRISMA methodology.

RESULTS

A search using the key terms of critical care, air ambulance, EN, nutritional status, and aspiration returned a total of 51,990 articles. A title review followed by a more targeted abstract analysis by the research team generated 39 articles for full-text review. The full-text review then yielded a total of 10 relevant articles for inclusion in the final synthesis table.

CONCLUSIONS

Overall, the consensus of the literature supports that early evaluation and initiation of standard EN feeding protocols on the ground and during transport improves patient outcomes and enhances injury recovery. However, additional research will determine the current number of patients fed in-flight along with the actual risks and benefits of EN in this population.