The study aim is to evaluate the tubal score on patients who suffer from obstructive dysfunction of eustachian tube before and after the eustachian tube dilatation.

The study aim is to evaluate the tubal score on patients who suffer from obstructive dysfunction of eustachian tube before the intervention and 12 months after the eustachian tube dilatation.

This patients are refractory to the reference medical treatment.

Inclusion Criteria:

• patients between 20 and 80 years old
• tubal score lower than 5
• patients who already used reference medical treatment

Exclusion Criteria:

• patients who already do a major surgery of middle ear
• tympanic perforation
• pregnant or breastfeeding woman.
• patients who can't be follow during 14 months