COPD
                        It su s desease state charcacterised by air flow limitation that is not fully reversible. The airflow limitation is
                             usually both pregressive and associated with an abnormal inflammatory respose if the lung to nozious paticles or gases.
                        
                        
                        Asthma
                        It is characterized by episodic periods of reversible airway narrowing in the presence of aeroallergens, irritant, or exercise.
                                Airway narrowing is due to inflammation, smooth muscle, bronchospasm and increased airway secretions
                                
                     Cystic Fibrosis
                        It is diasease which affects the excretory gland of the body.
                It is dysfunction of pulmonary system in which the thickened pulmonary secretions will narrow or obstruct airways leading to 
                            hyperinflation, infections and tissue destruction.
                        
                     Restrictive lung disease
                        Group of dieases with results in a difficulty in expamding the lungs and reduction in lung volume
                        The restriction can come from disease of the alveolar parenchyma and /or the pleura, changes in the chest 
                            wallor an alteration in the neuromuscular apparatus of the thorax.
                        
                     Bronchiectasis
                        Bronchiectasis means abnormal dilatation of the bronchi.Chronic suppurative 
                            airway infection with sputum production,progressive scarring and lung damage occur,whatever the cause.
                        Upper Resp Tract infections
                        Upper respiratory tract infections (URTIs), such as coryza (the common cold), 
                            acute pharyngitis and acute tracheobronchitis, are the most common of all communicable diseases
                    Pneumonia
                        Pneumonia is as an acute respiratory illness associated with
                             recently developed radiological pulmonary shadowing, which may be segmental, lobar or multilobar.