This text presents a basic guide of the principles and applications of ultrasound in the critical care setting. The text also addresses the basic and clinical uses of ultrasound, including clinical cases at the end of each of the 7 sections of the clinical subdivisions. The final chapters focus on the issues of training, certification, credentialing and billing. These discussions make the text unique, as literature regarding monetary and training issues for ultrasound in the ICU is sparse. Each chapter is written by experts in the field, and supplemented with illustrations and links to videos of actual ultrasound examinations in patients.