Pulmonology is a branch of medicine that specializes in the diseases involving the respiratory tract. It is concerned with the diagnosis and treatment of diseases of the lungs. These respiratory diseases include emphysema, asthma, pneumonia and tuberculosis. There are several clinical procedures that can be used for the diagnosis of pulmonary diseases, which includes blood tests, arterial blood gas tests, pulmonary function testing, bronchoscopy, CT scan, chest X-rays, etc. Surgical procedures can also be used to take a sample from inside the lung or chest to assist with the diagnosis. Spirometry is one of the diagnostic methods used to diagnose airflow obstruction. The treatment of pulmonary diseases involves medications which can either be inhaled or taken in oral form. Inhalers are used in the treatment of inflammatory lung conditions like chronic obstructive pulmonary disease or asthma. This book outlines the diagnosis and treatment of respiratory diseases in detail. It presents researches and studies performed by experts across the globe. The book is appropriate for medical students and professionals seeking detailed information in this area of medicine.