 The simplicity of placement is the main advantage of the Combitube over endotracheal intubation.When intubating with a traditional endotracheal tube, care must be taken to visually ensure that the tube has been placed in the trachea while the dual-lumen design of the Combitube allows for ventilation to proceed regardless of esophageal or tracheal placement.A device called the Positube, which allows for esophageal intubation detection, can be used on tube number two to rule out the intubation of the Combitube in the trachea.