second gen,
You are not the first person to ask me this. But I can only give you an ambigious answer.
Yes for some, no for most
Until it's understood
HOW and
WHY it works, a higher success rate most likely won't be fesable. Once that mechanisim is understood, the proper screening can be done and implanted in those who will most likely benifit. Right now it's all a crap shoot. Can't say who it works for, can't say how much relief the get and can't say for how long the treatment will last.
This is an "
ALPHA" product. The first of it's kind. It's going to have all kinds of quirks and problems because there is nothing else to compare it to, yet. Even though the baisc technology has been around since the 90's and they have "years" in terms of studies, it still quite new.
I am contacted by people all over the world with questions about VNS, with emails and phone calls wanting to know the same thing Does it work? If you have been reading the forums, you will see it does work for a select group. But for the majority, it does not. And I think there are a few specific reasons, one being correctly diagnosed. Epilepsy and depression are sometines very difficult to diagnose.
My seizure disorder began suddenly with one colossal gran mal that left me with a brain injury. I never had another grand mal but many many simple particals and complex particals, plus was medicated to the eyeballs. The medicaltion used to stop grand mals, often
causes other types of seizure activity.
A year later I was wined and dined by CYBX as the perfect candidiate. Sudden onset, newly diagnosed. But I did not jump right in, I researched anything and everthing I could find. Back in 2001, there wasn't much and only 10,000 were implanted then, not a lot when you consider there are over 2.5 million in the USA alone with epilepsy. It took me 6 months or more to make my ecision.
Depression has many faces and many diagnoses as well. It all depends on the doctor and what guideline he/she uses to assess the type of depression. There are no industry standards for these assessment such as there are for disorders and diseases like...diabities type I, juvenial onset, type II, adult onset, or hepititis I,II,III
Every person I have know personally who has had the VNS implanted, the devise no longer is effective. Some had a year or 2 of some relief, most had little or none. And the majority have told me they wished they had never had the surgery because of the residual problems later on.
Crap shoot.

Who get's lucky?
Most of the time, the House,
some of the time, the gamblers.
Thanks for asking. I may add more later, right now I have a date with a shushi chef!