The aim of this book is to focus on the critical care ultrasound for emergency situations and clinical applications. The field of ultrasonographic imaging has advanced very rapidly over the last three decades. It is a very unique imaging tool due to its portability, widespread availability and safety. This book consists of 14 chapters, which include introduction to critical care ultrasound and clinical implications, basic ultrasound physics for the critical care fellow, ultrasound of the airways for emergencies, ultrasound of the lung and clinical uses in emergencies, abdominal aortic aneurysm, deep vein thrombosis and pulmonary embolism, ultrasound of the gallbladder, pancreas and bowel in emergencies, ultrasound use in nephrology, critical care settings and post-transplant period, role of ultrasound in the liver transplant patient, ultrasound in the neurocritical care setting, ultrasound-guided vascular access, ultrasound-guided nerve blocks, and ultrasound-guided procedure. This book is just an appetizer of the things to come, as in the coming years plan to add sections on orthopedic applications, applications of the skin and subcutaneous tissues as well as sections on obstetric emergencies. This workbook is a reflection of the needs of the new trainees and the advances and expertise available.