It is a known side effect in some people from general anaesthesia. The stomach is designed to get rid of anything it considers a foreign invader, and the gases used in anaesthesia certainly are. It can also be a sign of many other things, including constipation. Constipation is a very common thing in UK hospitals, probably because of the terrible food :) It would be easier to chew a meteorite than one of their baked potatoes.
They may want to do an echo on the intestines to see if they are blocked somewhere. This will cause a backup for the stomach, causing it to eject its contents. One of the things I always do in hospital is make sure I drink plenty of fluids. The water they supply here gets warm very quickly, so I notice patients hardly consuming any fluids. I ask my family to bring in bottled water, then I ask the nurse to keep it in their large fridge.
Ths vomiting of green something is happening to my brother also, but the surgery was yesterday? Is this common after this type of surgery?
Hello and hope you are doing well.
Since its two weeks post surgery, it's unlikely that vomiting is related to anesthesia. The green colored vomit could be due to stasis of bile. It could be due to gallbladder disease or pancreatitis. Other possible causes of include bowel obstruction, inflammation of the stomach and small intestines from an unrelated source as well as an unrelated intestinal infection. You will need to consult your treating doctor, who may run blood and urine tests and may sometimes ask for an ultra sonography to detect the cause for the vomiting. .
Hope this helped and do keep us posted.