Noted the history about your partner having sensation of blocked ears, some noise off an on, ENT Check up, gromet insertion and so on but no relief.
The commonest causes I can think are as one of the following:Otosclerosis
or vestibulocochlear nerve
Inflammation of the vestibulo-cochlear apparatus in inner ear.
Since ENT Surgeon has already seen you, treated you I would advise you the following in such a situation.
MRI and CT scan of the mastoids
MRI for trigeminal nerve.
Tests of blood for CBC, liver and kidney function, thyroid function.
Proper clinical evaluation for blood pressure or such problems.Second opinion
of another ENT Surgeon and Neurologist
All these tings will lead to a proper diagnosis so that a proper management can be done.
Hope I have answered your query. Let me know if I can assist you further.
Dr. T. Chandrakant, General Surgeon