ATLS Protocol
Advanced Trauma Life Support
American College of Surgeons Committee on Trauma · ACS · 2018
The Advanced Trauma Life Support (ATLS) protocol, established by the American College of Surgeons Committee on Trauma, provides a standardised, prioritized ABCDE algorithm for the initial assessment, resuscitation, and stabilization of multiply injured trauma patients.
Citation & links
American College of Surgeons Committee on Trauma. Advanced Trauma Life Support (ATLS®) Student Course Manual. 10th ed. Chicago: American College of Surgeons; 2018.
Key findings
- 1.Prioritises immediate threats to life sequentially using the standardized ABCDE hierarchy before addressing isolated musculoskeletal trauma.
- 2.Eliminates aggressive, high-volume clear crystalloid boluses; 10th edition updates restrict initial adult crystalloid infusions to a single 1-litre bolus of warmed isotonic fluid to mitigate trauma-induced coagulopathy.
- 3.Endorses early activation of balanced, haemostatic massive transfusion protocols (using 1:1:1 ratios of PRBCs, FFP, and platelets) alongside tranexamic acid (TXA) given within 3 hours of trauma.
- 4.Refines needle decompression guidelines for tension pneumothorax to prefer the 5th intercostal space slightly anterior to the midaxillary line over the historical 2nd intercostal space midclavicular line.
- 5.Stresses immediate non-invasive mechanical pelvic ring stabilization (pelvic binder or sheet centered at the level of the greater trochanters) for suspected unstable pelvic fractures prior to secondary imaging.
- 6.Recognises the physiological and biochemical lethal triad (hypothermia, acidosis, and coagulopathy) as the threshold necessitating damage control orthopaedic strategies over definitive early total care.
Background
Prior to the development of ATLS in the late 1970s following a fatal civilian plane crash involving an orthopaedic surgeon's family, emergency trauma management was erratic and lacked standardisation, often resulting in preventable mortality during the 'golden hour'. The clinical imperative was to establish a universal, systematic clinical doctrine that prioritizes the identification and management of immediately life-threatening injuries first, establishing a safe common operational language across multidisciplinary trauma teams worldwide.
Methods
Developed via multidisciplinary expert consensus and continuous iterative revision by the American College of Surgeons Committee on Trauma (ACS-COT), ATLS synthesizes contemporary clinical evidence and expert recommendations. It targets all trauma healthcare providers, outlining structured primary survey resuscitation (Airway with cervical spine protection, Breathing, Circulation with haemorrhage control, Disability, and Exposure/environmental control), adjunct diagnostic procedures (FAST, chest and pelvic radiographs), and secondary survey assessments.
Clinical implications
ATLS fundamentally transformed orthopaedic surgery by subordinating isolated extremity care to systemic physiology and life preservation. Orthopaedic surgeons are integrated into primary survey resuscitation primarily to manage life-threatening surgical bleeding from unstable pelvic disruptions and large long-bone fractures. It introduced the modern paradigm of Damage Control Orthopaedics (DCO), mandating rapid temporary external fixation and soft-tissue temporisation rather than prolonged definitive early total care in physiologically compromised, unstable, or extremis polytrauma patients.
Critical appraisal
ATLS provides an extraordinarily reliable, reproducible, and globally accepted framework that reduces human error and mortality during the chaotic golden hour of trauma resuscitation. Its limitations include a historic reliance on consensus rather than prospective randomised trial evidence for every intervention, occasional sluggishness in integrating cutting-edge institutional protocols (such as endovascular resuscitation techniques and viscoelastic-guided transfusion), and a dogmatic linear approach that can delay concurrent interventions when practiced too rigidly by inexperienced providers.
Teaching note
Orthopaedic exit candidates must articulate trauma resuscitation strictly through the horizontal and parallel execution of the ATLS framework. Never begin an exam answer on polytrauma or open fractures with orthopaedic management; immediately state that the patient must be assessed and resuscitated following ATLS principles in a trauma team setting, identifying and managing catastrophic bleeding and airway compromise prior to addressing long-bone stabilization or wound debridement.
Exam-tested points
- ›Initial primary survey sequence: <C>ABCDE, ensuring cervical spine in-line immobilisation during airway assessment and immediate control of exsanguinating external haemorrhage.
- ›Proper application site for a pelvic circumferential compression device (binder) is centered directly over the greater trochanters, not the iliac crests.
- ›Class I to IV haemorrhagic shock classification based on percentage blood loss, heart rate, blood pressure, pulse pressure, urine output, and mental status.
- ›The 10th edition shift from a 2-litre crystalloid bolus to an initial 1-litre warmed crystalloid fluid challenge to prevent hyperchloraemic acidosis and dilutional coagulopathy.
- ›Indications for Damage Control Orthopaedics (DCO) versus Early Total Care (ETC): persistent hypothermia (<35°C), severe acidosis (pH <7.24 or base deficit >-6), coagulopathy (platelets <90k, INR >1.5), and concurrent traumatic brain or pulmonary injury.
- ›Diagnostic adjuncts during primary survey include portable chest radiograph, AP pelvic radiograph, and Extended Focused Assessment with Sonography for Trauma (eFAST).
- ›Secondary survey is only initiated once the primary survey has been completed, all life threats treated, and baseline resuscitation is progressing or established.
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