Burn experts are only 77% accurate when subjectively assessing burn depth, leaving almost a quarter of patients to undergo unnecessary surgery or conversely suffer a delay in treatment. To aid clinicians in burn depth assessment (BDA), new technologies are being studied with machine learning algorithms calibrated to histologic standards. Our group has iteratively created a theoretical burn biopsy algorithm (BBA) based on histologic analysis, and subsequently informed it with the largest burn wound biopsy repository in the literature. Here, we sought to report that process. This was an IRB-approved, prospective, multicenter study. A BBA was created a priori and refined in an iterative manner. Patients with burn wounds assessed by burn experts as requiring excision and autograft underwent 4 mm biopsies procured every 25 cm². Serial still photos were obtained at enrollment and at excision intraoperatively. Burn biopsies were histologically assessed for presence/absence of epidermis, papillary dermis, reticular dermis, and proportion of necrotic adnexal structures by a dermatopathologist using H&E with whole slide scanning. First degree and superficial second degree were considered to be burn wounds likely to have healed without surgery, while deep second- and third-degree burns were considered unlikely to heal by 21 days. Biopsy pathology results were correlated with still photos by five burn experts for consensus of final burn depth diagnosis. Sixty-six subjects were enrolled with 117 wounds and 816 biopsies. The BBA was used to categorize subjects’ wounds into four categories: 7% of burns were categorized as first degree, 13% as superficial second degree, 43% as deep second degree, and 37% as third degree. Therefore, 20% of burn wounds were incorrectly judged as needing excision and grafting by the clinical team as per the BBA. As H&E is unable to assess the viability of papillary and reticular dermis, with time our team came to appreciate the greater importance of adnexal structure necrosis over dermal appearance in assessing healing potential. Our study demonstrates that a BBA with objective histologic criteria can be used to categorize BDA with clinical misclassification rates consistent with past literature. This study serves as the largest analysis of burn biopsies by modern day burn experts and the first to define histologic parameters for BDA.

We performed a needs assessment to determine the essential elements for a curriculum teaching burn care during Large Scale Combat Operations against peer/near-peer adversaries within multi-domain contested combat environments. Virtual and face-to-face site visit meetings were conducted with 20 stakeholders at 3 levels: (1) Subject Matter Experts in military burn casualty care at the US Army Institute of Surgical Research (USAISR), the Joint Trauma System, and the US Army Medical Center of Excellence (US Army MedCOE) in Joint Base San Antonio (JBSA) – Fort Sam Houston, TX; (2) Course Directors, Instructors, Curriculum Innovators, and Writers for the Combat Paramedic Branch and the Critical Care Flight Paramedic Program at JBSA; and (3) regulatory administrators providing education, research, and Institutional Review Board (IRB) administration for USAISR and US Army MedCOE. The identified terminal learning objectives (TLOs) consisted of training in burn casualty monitoring and principles of burn wound care according to available resources; best practices during prolonged casualty care for pain, nutrition, and infection control; specific management of inhalation, chemical, radiation, electrical, pediatric, and mass casualty burn injuries; and procedural skill training for patient decontamination, debridement, dressings, and escharotomy. Additionally, needs were identified for novel technology that provides asynchronous individual learning opportunities using interactive role-play simulations, immersive simulation, or virtual reality simulation as well as hands-on procedure simulators. Stakeholder engagement resulted in the identification of 16 TLOs that were subsequently used as the basis for a military curriculum we are calling the “Burns for Providers Program” (BP2).