The Prehospital Trauma Life Support (PHTLS) Refresher course focuses on principles of prehospital trauma care, not preferences. By focusing on the principles of good trauma care, PHTLS promotes critical thinking. The PHT Committee of the NAEMT believes that EMS practitioners make the best decisions on behalf of their patient when prepared with a sound foundation of key principles and evidence-based knowledge. This PHTLS course is specifically designed to address the unique challenges encountered when caring for trauma outside of the hospital.