This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Airway, Subject name: Anaesthesia
The cuff used in Endotracheal tube is following 
Select and explain. 
A. Low pressure - high volume, B. High pressure - low volume, C. Variable pressure - low volume, D. Low pressure - low volume
A: Low pressure - high volume
Answer: A: Low pressure - high volume 
Explanation: Low pressure - high volume type cuffs have a comparatively large volumes and consequently large contact areas between cuff and trachea. Advantage of high volume, low pressure cuff is lesser incidence of tracheal mucosal damage. Disadvantages of high volume, low pressure cuff include: Sore throat (due to larger mucosal contact area) Aspiration Spontaneous extubation Difficulty in inseion (because of the floppy cuff)