Increased Work of Breathing Airflow obstruction ° Bronchial asthma Chronic bronchitis and emphysema .Tracheal obstruction Decreased pulmonary compliance pulmonary oedema pulmonary fibrosis Extrinsic allergic alveolitis Restricted chest expansion .Ankylosing spondylitis respiratory muscle paralysis .kyphoscoliosisIncreased Work of Breathing Airflow obstruction •Bronchial Asthma •Chronic bronchitis and emphysema •Tracheal obstruction Decreased pulmonary compliance •Pulmonary oedema •Pulmonary fibrosis •Extrinsic allergic alveolitis Restricted chest expansion •Ankylosing spondylitis •Respiratory muscle paralysis •Kyphoscoliosis