My Father Is 76. He Is Non Diabetic. From 2/3

My father is 76. He is non diabetic. From 2/3 months he was suffering from hypertension,feels very week .Last month he suddenly became unconscious and admitted to nearby hospital.It was observed that his blood sugar level was at 45.Several blood test/insulin test revels that he is suffering from insulinoma.CT scan was done for both abdomen and chest but cause still unknown.He is now at home and we give mill after every 3 hrs but is frequency of sugar fall increases day by day.We need immediate treatment. Any suggestion and which one is the best hospital in india /bangalore to treat such patient.