Indications
The long-term ventilation for more than 21 days
The airway obstruction; for example, by injury or tumors
The advantages over a trans laryngeal intubation.
Advantages
The avoidance of damage to the arytenoid cartilages
The avoidance of mucosal lesions on the vocal cords, trachea and mouth and nose
A lower airway resistance (decrease the work of breathing)
A smaller dead space
The...
