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Date: March 26, 2026

Dr. Rob Leeper

Guest Skeptic: Dr. Robert Leeper is a trauma surgeon at the London Health Sciences Centre and an ATLS instructor who has helped train generations of physicians in trauma care. He has previously joined SGEM for:

It’s SGEM Xtra time, where we go beyond a single paper and dive into broader topics that impact our daily practice. Now, some of you may remember that back in 2018, we did a Top 10 list for ATLS 10th Edition. Yes, we cranked it up to 10.

ATLS 10th Edition: Top 10 Changes

But today… We’re not stopping at 10. Because this SGEM episode goes to 11. If you don’t get that reference, go watch This Is Spinal Tap. It’s a mockumentary about a fictional rock band whose amplifiers go to 11 instead of 10. And when asked why they didn’t just make 10 louder, the guitarist replies: “These go to 11.” And that brings us to ATLS, now officially in its 11th edition.

For those who don’t know the history of ATLS, here is the brief back story. ATLS was born out of tragedy. In 1976, orthopedic surgeon Dr. James Styner crashed his small plane in rural Nebraska. His wife died at the scene. He and his children survived but were severely injured. When they arrived at a small hospital, the trauma care they received was, by his account, disorganized and inadequate.

Styner later said: “When I can provide better care in the field with limited resources than my children and I received at the primary care facility, there is something wrong with the system.” That moment led to the development of a structured approach to trauma, one that could be taught, replicated, and standardized.

The first ATLS course was introduced by the American College of Surgeons (ACS) in 1980. It emphasized something radical at the time: a systematic, prioritized assessment of trauma patients, beginning with Airway, Breathing, Circulation, Disability, Exposure (ABCDE).

In EM, our alphabet is A-B-CT, send them to the donut of truth. But back to the 1980s, the systematic ABCDE approach wasn’t about memorizing injuries. It was about preventing death from the first thing that kills. Over the decades, ATLS became one of the most widely adopted trauma education programs in the world. It has trained hundreds of thousands of clinicians in over 80 countries.

And like any long-running franchise (Star Wars, Mission Impossible, Star Trek and Batman), each new edition tries to improve on the original. So today, instead of a Top 10 list as we did for ATLS 10, we’re going with: The 5 important changes in ATLS 11. Because sometimes less is more. Even if the amplifier goes to 11.

Five Changes to the ATLS 11th Edition

1. xABCDE – Hemorrhage Now Comes Before Airway: The most noticeable clinical change in ATLS 11 is the addition of the “x” to ABCDE, making it xABCDE, with the “x” standing for exsanguinating hemorrhage. Massive external bleeding is now formally prioritized before airway management in select patients. While many trauma teams have already internalized the “bleeding kills first” principle, especially after a decade of military-to-civilian trauma translation, ATLS has now codified it. In practical terms, this reinforces early tourniquet use, direct pressure, and hemostatic adjuncts as first-line priorities when appropriate. It’s less of a revolution and more of an official acknowledgment that the trauma world has already turned the volume up on hemorrhage control. But formalizing it in the primary survey does matter, because what gets taught gets practiced.

2. Hemodynamic Optimization Before Intubation: Another subtle but important evolution in the 11th edition is the greater emphasis on resuscitating shock before proceeding with rapid sequence intubation (RSI). ATLS 11 highlights the risk of peri-intubation hypotension and arrest in unstable trauma patients, encouraging clinicians to correct hemodynamics before pushing paralytics. This aligns with growing emergency medicine literature around the dangers of precipitous airway management in the shocked patient. It’s a welcome shift toward physiologic thinking rather than purely procedural thinking. In other words, it reminds us that the airway isn’t just anatomy, it’s physiology.

3. Major Structural Reorganization and Systems Focus: The changes to ATLS 11 aren’t just clinical. This edition reorganizes the manual into three major sections: resuscitation, trauma systems/context, and specific injury patterns. More notably, it introduces full chapters on Trauma Systems, Injury Prevention, Trauma-Informed Care, and Communicating Serious News. This reflects a broader view of trauma care that extends beyond the primary survey. ATLS is no longer just about what happens in the first 15 minutes. It is also about the system in which those 15 minutes occur. For instructors, this may feel like an expansion into public health. Whether that’s evolution or mission creep may depend on your worldview. But it’s clear ATLS is trying to move from protocol to platform.

4. Dedicated Penetrating Trauma Chapter: Penetrating trauma now has its own standalone chapter in the 11th edition. This shows recognition that penetrating injury has unique management considerations compared to blunt trauma. The new edition emphasizes mechanism-driven evaluation, selective non-operative management, and updated surgical decision-making paradigms. For the USA trauma systems, this is particularly relevant given the epidemiology of violence-related injury (acute lead poisoning…Gun Shot Wounds [GSWs]). GSWs are the leading cause of death in the US for children aged 1 to 17 years. The key question, from an SGEM lens, is whether the content fully reflects contemporary evidence, especially regarding selective non-operative approaches. But structurally, this is a meaningful shift that gives penetrating trauma its own intellectual real estate.

Dr. Andrew Worster

5. “Standardized Flexibility” – A Global Adaptation Philosophy: Perhaps the most philosophically important change in ATLS 11 is the formal adoption of “standardized flexibility.” The manual explicitly acknowledges global variability in trauma resources. Some places have CT availability, blood products, and access to specialist care, while others do not. ATLS now encourages adapting principles to the setting, rather than assuming Level I trauma center capabilities everywhere. This is a recognition that trauma education must be globally applicable. It moves ATLS from a rigid protocol toward a framework. It reminds me of the Evidence-Based Medicine (EBM) answer I learned from my mentor, Dr. Andrew Worster, “It all depends”. Traumas occur in a context (urban/rural/remote, academic/community, low-resource/high-resource, etc.). How ATLS is applied in your clinical situation will depend on many factors and requires flexibility.

Other changes we wanted to mention:

  • Head and spine combined into “disability.”
  • Expanded section on geriatric trauma (now “Trauma in the Older Adult”)
  • Enhanced team communication emphasis
  • Hybrid learning and required pre-course videos
  • Updated transfer mnemonic: S-xABCDE-BAR

S: Situation (Who/Where/Why): Your name & role, location, patient demographics, mechanism of injury and reason for transfer.

 xABCDE: Primary Survey Summary

  • x – Exsanguinating Hemorrhage: Tourniquet? Pelvic binder? Massive Transfusion Protocol activated?Ongoing bleeding?
  • A – Airway: Patent? Intubated? Endotracheal tube size? C-spine protected?
  • B – Breathing O₂ saturation? Chest tube? Vent settings? Tension pneumothorax addressed?
  • C – Circulation: Blood Pressure/Heart Rate? Intravenous/Intraosseous access? Blood products given?TXA given?
  • D – Disability: Glasgow Coma Scale? Pupils? Lateralizing deficits?
  • E – Exposure: Other injuries? Temperature? Hypothermia prevention?

BAR:

  • (B) Background: Past Medical History. Medications (Anticoagulants?). Allergies. Baseline function.
  • (A) Assessment: Confirmed injuries. Working diagnosis. Clinical concerns.
  • (R) Recommendations: Immediate needs? Operating Room? Intensive Care Unit? Imaging? Surgical team activation?

SGEM Bottom Line: ATLS 11th Edition doesn’t radically reinvent trauma care. However, it formalizes hemorrhage-first thinking, expands systems-based trauma care, modernizes structure and teaching and recognizes global variation.

The SGEM will be back next episode with a structured critical appraisal of a recent publication. Our goal is to shorten the knowledge translation (KT) window from over 10 years to less than 1 year by leveraging the power of social media. So, patients get the best care, based on the best evidence. 

Remember to be skeptical of anything you learn, even if you heard it on the Skeptics’ Guide to Emergency Medicine.