The book covers a wide range of techniques useful for medical and paramedical professionals across specialties such as anesthesiologists, intensivists, and emergency physicians. It includes techniques and procedures ranging from the simple ones like intravenous access to the advanced ones like transesophageal echo (TEE) or extracorporeal membrane oxygenators (ECMO). It covers the basic techniques in detail helping the clinicians as well as the paramedical staff like nursing, anesthesia assistants and emergency technicians in developing their knowledge and skills in management of emergency and critical situations. Additionally, the book explains the fundamentals of advanced techniques like TEE and ECMO to prepare the readers for an advanced learning and training subsequently. Each technique is presented in a simple, lucid and practical way with complete details of the steps, equipment, indications, and contraindications. It also emphasizes modifications for different settings, like emergency and critical care settings, wherever appropriate. The book is an up-to-date and evidence-based resource contributed by expert professionals.