Sputum examination is a key diagnostic procedure for patients suspected of having pulmonary TB, including those for whom bronchoscopy is In addition, early identification of persons with TB remains the most effective way of preventing TB transmission. However, some patients are unable to produce sputum for examination. In such cases, sputum induction by aerosol inhalation and/or gastric aspiration has been The Lung Flute (Medical Acoustics, Buffalo, NY, USA) is a small self-powered audio device that generates sound with a frequency of 18–22 Hz with an output of 110–115 dB using a pressure of cm H2O. This sound wave, when generated at the mouth by mild exhalation, travels back down the tracheobronchial tree.
