The LPN-San is optimally tailored to the profession of paramedics, emergency responders, and company paramedics. It is an easy-to-understand and compact textbook that covers all the topics important for training in these fields. Many volunteer helpers in the medical service and disaster relief of aid organizations will also find the LPN-San to be the right textbook for them. The professional and teaching experience of the 40 authors and four editors ensures its content and didactic quality. For the 4th edition, the introductory work has been completely revised; it is now structured according to a typical rescue operation and its progression. The medical care consistently follows the ABCDE scheme and is thus aligned with key symptoms. All measures, flow charts, and guidelines have been updated to the current standards.