Mr. smoke has had a persistent cough and hoarseness for several months. the doctor has scheduled mr. smoke for an examination of the interior of the bronchi using a lighted, flexible tube known as an endoscope in order to observe the air passages for signs of disease and to obtain a biopsy of bronchial tissue for examination. this procedure is called

The procedure is called Respiratory endoscopy or bronchoscopy.

Explanation:

This kind of procedure is able to take a look down into the respiratory tract in order to observe possible symptoms of some diseases. As the endoscope can reach the bronchi, it's possible to extract a piece of tissue in order to analyze it and understand better the patient's diagnosis.

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