I work for a Canadian EMR company and we deal with a couple of options for medical voice software. I know Dragon naturally speaking has a medical offering that likely would meet any regulatory requirements. There are also some subscription based ones that I don’t know if there are US versions of, but If you google the medical options you should be able to find some options.
I think in the third case the symbiont wouldn’t be in Sto’Vo’Kor. It didn’t die. So a Jadzia returning would be without Dax. So then the question would be would she return with the Dax memories or not.