From: Balloon dilation of the eustachian tube: a tympanometric outcomes analysis
Pre-op tymp
Post-op tymp
Proportion
Percentage
B
A
2/5
40 %
C
6/20
30 %
1/5
20 %
Improvement in Type
9/25
36 %
Normalization of Tympanogram
8/25
32 %