An inflated endotracheal tube cuff maintained at a desired inflation using a constant air source. The constant air flow source is connected to a pressure regulator that is connected to the endotracheal tube cuff via the endotracheal tube cuff lumen. The regulator includes a bleed valve used to control the air pressure to the cuff so that a constant desired air pressure is maintained. The regulator may also include a manometer for visually displaying the pressure in the regulator, and thereby the cuff.
