The success of weight loss surgery lies in selecting the right candidate for the surgery. Moreover, the type of surgery is to be individualized per the patient.
BMI(Body mass Index) plays a vital role in selecting the patient. BMI is an index derived from the weight and height of the person. It is calculated by dividing the body weight by the square of the body height, and is generally expressed in units of kg/m2.
Weight loss surgery is indicated in western persons having body-mass index (BMI) >40 kg/m2 or with BMI >35 kg/m2 and 1 or more significant comorbid conditions (e.g Diabetes Mellitus, Hypertension, Sleep Apnoea, Joint pain etc.). In Asian persons, the minimum BMI is >35 and >32.5 respectively. Recently, the American Diabetes Association has recommended to consider weight loss surgery as the treatment option for adults with type II diabetes and BMI 30-34.9 kg/m2 (27.5-32.4kg/m2 in Asian).
Weight loss surgery results in significant and sustained weight loss which is not possible by the non-surgical means if your BMI reaches that mentioned above. The exquisiteness of weight loss surgery is that, besides reducing the weight, it immensely helps in alleviating the ill effects of associated morbidities.