Diurnal fluctuations of middle ear pressure normal ears

ABSTRACT

Tympanograms were done to measure the middle ear pressure of 18 subjects [36 ears] who were fit clinically and O.R.L. free. This was done for three times at 3, 11 pm. And 7 A.M. there was diurnal middle ear pressure fluctuations with a relative shift towards positivity at night compared to day measurements which reached its peak at 7 A.M. yet there was no statistically significant difference between the mean middle ear pressure at the three times of measurement