Assertion: flexible bronchoscope | /r/HasProperty | a balloon catheter
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text: The standard technique involves placing, with the help of a flexible bronchoscope, a balloon catheter or a small endotracheal tube in one bronchus, inflate the balloon to isolate the bronchial tree and carry out a massive BAL through the tube or catheter, while ventilating the other lung by means of a laryngeal mask or an oropharyngeal tube (strong recommendation; low-quality evidence).