Thanks for the query to H.C.M. Forum.
If I were the treating doctor of your wife for this severe vomiting
I would come up with these possibilities , these includes.
1 Diabetic acidosis , diagnosis can be confirmed by H B A 1 C , blood sugar level and acidic level . As you mentioned in the query that she lost 10 kg weight within one month , so serious .
2 The next reason may be pancreatic carcinoma
, diagnosis can be confirmed by M R I of pancreas with ultrasound
( emphasis over pancreas ) . Any abnormality in pancreas causes diabetes
as well as recurrent vomiting.
In my opinion please consult a diabetologist
and get his opinion .One more indication of diabetes is that in spite of recurrent vomiting her blood sugar level is high .
Good luck. Dr. HET