The importance of the lungs as the effector organ of respiration cannot be underestimated. Respiration and life depend on the absorption of oxygen from the atmosphere and the removal of carbon dioxide through pulmonary ventilation. Healthy life depends on the quality of the vital system. Especially the recent epidemic diseases (Sars, Covid-19 etc.) affecting this system have caused the picture of lower respiratory tract involvement and epidemic diseases to reach alarming dimensions. In addition, impairment of the respiratory system through loss of respiratory muscle function, increased airway resistance, decreased lung compliance, alveolar destruction or physical obstruction leads to a general loss of functional ability.