Emergency surgery is the surgery which is aimed at the management of an acute threat to organ, limb or tissue. It may also include threat to life caused due to extreme trauma, acute exacerbation of a disease, acute disease condition or complications arising due to a surgical or interventional procedure. The field of emergency surgery involves knowledge of surgical anatomy, and applied pathology and physiology. The understanding of the physiology of the condition or disease, pre-existing comorbidities and their influence on the current condition, and assessment of the condition including the need for surgery are vital to emergency surgery. Emergency surgical procedures include thoracic, abdominal, vascular and soft tissue procedures. This book is compiled in such a manner, that it will provide in-depth knowledge about the theory and practice of emergency surgery. The topics covered herein outline various medical emergencies, and their therapeutic interventions. In this book, using case studies and examples, constant effort has been made to make the understanding of the difficult concepts as easy and informative as possible, for the readers.