This book provides an introduction to the field of human factors for individuals who are involved in the delivery and/or improvement of prehospital emergency care and describes opportunities to advance the practical application of human factors research in this critical domain. Relevant theories of human performance, including systems engineering principles, teamwork, training, and decision making are reviewed in light of the needs of current day prehospital emergency care. The primary focus is to expand awareness human factors and outlay the potential for novel and more effective solutions to the issues facing prehospital care and its practitioners.