Re: nissen post op
My experiences with the Nissen were a bit different. I had breathing problems as a result of the acid aggrevating my lungs.
I'd like to share what my doc told me at one point. He said that it would take several months for my stomach swelling to reduce down and for my "tummy to stop being upset at me" for the trauma I caused it. It has been 4 months for me and while I'm doing well, I still have days that I have things that trigger me to remember that I'm still healing. I held off on eating most meat and bread for about 3 months. I think that helped a lot in my healing. I'm also still taking PPI's twice a day.
As for the voice, I would imagine that if the reflux was that severe for so long that it might take a long time for the inflammation to go down. I'd recommend talking to your GI doc or surgeon about it. I'd also recommend going to see an ENT who treats LPR. They should be able to give you some expert advice on the healing time for the voice.
As for the secretions, they may be stuff that isn't making it all the way down into her stomach. It can happen pretty easily as this point. Usually one of two things happen when something doesn't go all the way down: it sits there until it does eventually go down or it will come back up. If she is swallowing a lot there may be air that isn't making it down into the stomach that is affecting things as well.
Also, make sure your wife is taking small bites, chewing all food thoroughly and drinking plenty of liquids.
I wish your wife a good recovery.