This book focuses on the management strategies of complex conditions of frail pediatric patients. The clinical condition of frailty is usually seen as the physiological and multidimensional decline of organ systems related to age: paradoxically, a frailty condition can also occur in children as a disability resulting from various congenital or acquired diseases. The fragile patients are more vulnerable to developing severe clinical events and often need surgical interventions. Moreover, those patients have significant morbidity and lower quality of life. The improvement in managing fragile patients has improved their life expectancy, but in most health care systems, the passage from childhood to adulthood is a critical point for the lack of medical figures able to provide the continuity of care. The book aims to provide guidance for dealing with medical and surgical emergencies and to develop short and long-term treatment strategies, and will provide an analysis of the different and the most innovative techniques. This book will be an unvaluable tool for Pediatric surgeons, Anesthesiologists, Critical Care Physicians, Hospital and family Pediatricians, nurses, Physiotherapists and Psychologists.