Dear Editor,
We would like to present a novel system for monitoring double-lumen tube (DTL) positions in thoracic surgery by respiratory sounds at the trachea and the bronchi,based on our previously described methodology,algorithms,and patented technology[1-2].
Most thoracic surgeries require one-lung ventilation(OLV).A DLT or a bronchial blocker (BB) is the most common means for managing OLV.