My Mom Is 70, Few Times Her Banding Opened And

My mom is 70, few times her banding opened and she was throwing up blood clots , then she gets admitted , re banding , then again after a bit she won't stick to a simple food diet , etc. What kind of diet is suggested and is their a generic list for breakfast lunch dinner and snacks that won't let her stomach work hard on those food processing . Pls suggest a list of dos and donts Pls pls . Thanks karuna