The second and updated edition of 'Ecografa en el enfermo crtico' continues to provide specialists with a seamless integration of content in both print and electronic formats. This edition offers practical tools, such as figures, videos, and animations, to help specialists achieve faster and more accurate bedside diagnoses, monitor patients, or guide interventional procedures. It begins with an introductory chapter on basic technical aspects, followed by chapters on cardiac, pulmonary, abdominal, vascular, and neurocritical patient ecographies. A chapter on various aspects of interest, including the ecographic evaluation of airway instrumentation and other small parts, is also included. A new chapter focuses on multi-organ ecography in critical patients during pregnancy and postpartum, and the final chapter covers ecographic protocols for critical patients.