lung and airway disorders
Introduction to Diagnosis of Lung Disorders
Introduction
The respiratory system starts at the nose and mouth and continues through the airways and the lungs. Air enters the respiratory system through the nose and mouth and passes down the throat (pharynx) and through the voice box, or larynx. The entrance to the larynx is covered by a small flap of tissue (epiglottis) that automatically closes during swallowing, thus preventing food or drink from entering the airways. (See also Overview of the Respiratory System .) Doctors may suspect a problem with the lungs or airways based on symptoms. Symptoms of lung disorders often affect breathing and may include Cough in Adults None Coughing Up Blood None Coughing up sputum Shortness of Breath None Wheezing None Symptoms that affect other parts of the body may also suggest a lung disorder is present. People with a lung disorder may have Chest Pain None Clubbing (enlargement of the tips of the fingers or toes) Cyanosis (bluish or grayish discoloration of the skin) Other, more general symptoms, such as fever, weakness, fatigue, or a general feeling of illness or discomfort (malaise), sometimes also reflect a lung or airway disorder. Some symptoms, such as cough or wheezing, may indicate a lung disorder. Disorders that affect the nerves or muscles, such as Myasthenia Gravis and Respiratory symptoms may be minor (such as a cough caused by a cold) or life threatening (such as severe breathing difficulty). The characteristics and pattern of symptoms help doctors diagnose the lung disorder. When people have symptoms that suggest a lung disorder, doctors ask specific questions about the symptoms and other relevant factors (the Medical History and Physical Examination for Lung Disorders ). Doctors usually also do a 