I work in a surgical suite and this summer was the first time that I heard of a VNS. One of our surgeons implanted one in a male patient to perhaps decrease his seizures.
He was an extreme case due to the fact that his seizures where continuous and limiting his quality of life. This was an attempt after many alternatives were tried.
The procedure did not take long and the gentleman was conscience and speaking before he left the OR.
I spoke to the Doc about it and he did mention that it was also used for certain types of depression. From what I remember it is sort of like a putting in a pacemaker. It is under the skin and when done by a qualified surgeon it is a safe procedure. Do your homework on the VNS and the surgeon you would be referred to.
Judy