vomiting on a regualr basis for no apparent reason-blamed on dumping?

my mom is almost 2 years post op open RNY. 9 months ago she started vomiting for no apparent reason. usually she would eat, be fine, go to bed sleep all night and wake up vomiting for 12-24 hours with one day extra needed just to recover. this was orignally only every couple of weeks, but over the last 9 months has now become a regularity every 4-5 days. she has had an barium xray and colonospcy, both showed her surgery as fine but both missed the kinks/adhesions in her intestine that had created a blockage. that was discovered and fixed in an exploratory suregery 4 weeks ago. since than she has been sick at least 4 more times, 2 of which have been in the last 9 days while being on a clear liquid only diet. it has consisted of chicken bullion, sugar free popsciles and jello, water, and her protein drink called isopure. she had just started making her own chicken stock to try to increase her nutrition and caloreis since she has gone from 280 pd to 115 and her BMI is now 18.6 she has no energy and is tired all the time due to this malnutrition and low body weight. during the 4 days between being sick she can eat anything and will feel fine and begin to regain her strenght. than like clockwork she will mysteriously begin vomiting for 12-24 hours again. her lates bout of vomiting started yesterday afternoon in her surgeons office and she went downhill fast health wise. he admitted her to the hospital and is going to install a pic line in her arm to feed her food and vitamins through it. she has been put on a nothing by mouth order by her surgeon who is convinced this is dumping snydrome. he says her body is in a cycle of dumping regardless of what she eats and if he breaks it she will be fine. he says she is not dying, yet freely admits that he doenst' know what to do. has anyone ever had this, heard of it, have any ideas? desperate to know more and not lose my mom, also wondering if it could be hereditary since she was fine her first year post op also. help

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