Effect of Surface Tension Lowering Substances to the Opening Pressure of Eustachian Tube in the Guinea Pig

Abstract

Opening pressures of the eustachian tube were measured before and after tubal washing by several solutions (surfactant, phospholipids, detergent, and saline solution). The pressure reduction ratio were caliculated, and both reduction ratios of surfactant and detergent were significantly larger than that of saline solution. There were no significant differences between the pressure reduction ratios of phospholipids and that of saline solution.