If her stomach pain was immediate and strong, her tube is not in her stomach. This is a very serious problem and requires immediate medical care.
Whew. Having covered the worst possible scenario, I'll move on to the more likely...
Your moms trust in tube feeding has been clobbered by a bad first experience so going slowly is important in getting her used to feedings. After checking the tube placement (go to
ALS: From Both Sides for info on how if you aren't sure), begin with small feedings of about 2 ounces (60 cc's). That should be enough to see if her discomfort is due to the feeding method or if she is not tolerating the brand of formula. Make sure the feeding is a bit warmer than room temperature by adding a little hot water. Don't overdo the amount of water used in flushing -- 60 cc's should be plenty. You can skip any pre-feeding flushing. The water should be lukewarm too. Let the feeding and the flush flow in by gravity by using a 60 cc syringe as a funnel. If this causes stomach discomfort try blenderized food she is used to. Blenderize the heck out of it and add water to it to keep from clogging the tube. Don't worry about nutritional content right now, just give her something she liked to eat.
If she tolerates either the formula or food this way, begin with every 2 hour feedings of the same. If that goes okay for the day she shouldn't need overnight feedings unless she wakes up hungry. Tomorrow try increasing the amount of feeding and stretching the time between. Some people can tolerate a whole can of formula (240 cc's) at once, but half that is probably more comfortable for most of us. Give that amount a little more slowly by holding the syringe low by her stomach while gravity feeding.
Once she is doing ok with the feedings you can sort out the questions of formula brand (fiber added brands are essential), nutrition, total daily amounts needed, frequency, and making the process easier.
