Figure 1From: Endotracheal tube cuff pressure in three hospitals, and the volume required to produce an appropriate cuff pressure The relationship between measured cuff pressure and volume of air in the cuff. There was a linear relationship between measured cuff pressure (cmH2O) and volume (ml) of air removed from the cuff: Pressure = 7.5. Volume + 2.7, r2 = 0.39.Back to article page