I found this online-—
My mom had her vagus nerve cut in the process of ulcer surgery in 1978. Along with cutting the nerve, they removed her gall bladder and appendix.
While it seemed to have helped the ulcers, it created a whole new set of problems that get worse over the years. The simpliest manifestation is her comment after eating that the food “seems to just sit on my stomach” - something it actually appears to do.
In reading, it appears to have had a negative effect on her entire digestive system and from reading may have an affect on blood pressure and even speech.
Additionally, as there is not reversal, the problems just seem to be getting worse as she ages.
YIKES
That is why food "just sat in her stomach." The gall bladder is extremely important. I would do everything in my power to keep it and not let some surgeon tell me there's "no real need" for the gall bladder. Gall released from the gall bladder is what digests the fat.