Pulmonology is the field of medical science that deals with diseases related to lungs. The professionals or doctors working in this field are generally trained in dealing with diseases related to chest such as tuberculosis, asthma, emphysema, pneumonia and other complications. This also involves ventilator support in case of critical breathing problems. In this book, using case studies and examples, constant effort has been made to make the understanding of the difficult concepts of pulmonology practiced by clinicians as easy and informative as possible, for the readers. This book consists of contributions made by international experts which unravel the recent progress of this field. It is an essential guide for pulmonologists, academicians and those who wish to pursue this discipline further.