The Essentials of PreHospital Trauma Care (EPHTC) book covers the core information needed by EMS providers to care for the victims of trauma. The EPHTC book is unique in that it uses the M-A-R-C-H approach for the assessment and management of the trauma patient. The book utilizes Dynamic Editing that was created by IPHMI and allows the authors to continuously update the material as research dictates. This keeps the EPHTC book the most up-to-date prehospital trauma reference there is. Research in EMS changes the standards of practice quickly.