An<unk>  (also called an<unk>  tube or<unk>  is used in anaesthesia, intensive care and emergency medicine for airway management and mechanical ventilation. The tube is inserted into a patient's trachea in order to ensure that the airway is not closed off and that air is able to reach the lungs.  The<unk>  is regarded as the most reliable available method for protecting a patient's airway.
Endotracheal tube
Tracheostomy
Chest tube
Arterial line
Medical ventilator
Cricothyrotomy
Airway management
Central venous catheter