About this episode
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:
SGEM #200 – Bloodletting and Alexander Hamilton
SGEM #256 – RLQ Pain and Appendectomy
SGEM #345 – Non-operative Management of Appendicitis
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
