The aperture is large, decidedly patulous anteriorly. Patulous Eustachian tube is a physical disorder. The aperture is very large, patulous anteriorly;. Patulous Eustachian tube is likely if brisk inspiration causes a significant pressure shift. In addition, patulous Eustachian tube generally feels dry with no clogged feeling or sinus pressure. The anus is usually patulous, (loose, open) and has reduced resting and squeeze pressures.