The ET tubes are also known as endotracheal tubes. The tubes serve the purpose of ensuring that the patient’s respiratory tract remains open during surgical operations or emergencies, especially during ICU management. The tube is introduced into the respiratory tract through the mouth or nostril, and it serves the purpose of ensuring that patients breathe normally. The end of the tube is provided with a tiny balloon that ensures that there is no leakage of air and that no liquids enter the lungs.