Hi. Thanks for your query. This is difficult to believe that your husband was admitted 22 times in the hospital in this duration say since 2009 for the same issue every time and till date no perfect diagnosis is made. Another contradiction is that you say he gets dehydrated yet the Blood pressure shoots to the stroke level. In fact the Blood pressure should get reduced with dehydration and the pulse rising higher. Well, this is possible in few conditions where the body reacts in different way , not in the usual patho-physiological way. We have to have a conclusive diagnosis ; I would advise you the following: Since he is diabetic, you have to get all his parameters of diabetes, lipid profile ,cardiac status and any abnormality as his responses are different in dehydration. To prove the point further you have to get his angiography of the intestines as there may be some vascular problems. CT scan of the abdomen and Enteroclysis during the same time can give the hint as he is vomiting early with lower abdominal pain, which can occur in sub-acute intestinal obstruction. These test alone can give proper diagnosis. Psychiatric evaluation is needed if all the tests are normal.