That’s a tough ask. There are tests you can have that are grounds for surgery for further exploration but afaia there is still no accurate objective test for fistulae. Even after patching it’s impossible to prove if you had one.
Because of my ear trauma, my MAV was separately diagnosed as Secondary Hydrops after PLF.
I’ve had fluid sensations in my ear since the trauma and this has taken over 3.5 years to abate (far longer than Hain says they take to heal btw) spontaneously. So glad I never went for surgery and as per Hain mine seems to have healed without intervention (thank you Hain!!!)
I suspect a substantial number of PLF’s end up healed and you are left with Hydrops which causes most of the vertigo, residual hearing loss, tinnitus and odd vestibular crud.
The whole disturbance could also, theoretically give you ETD due to all the blood and goo (the injury could cause an increase in mucosa in your middle ear due to the inflammation) which builds up in your middle ear and Eustachian tube and you end up with a real mess, leading to all the MAV like symptoms.