For bariatric surgery, which includes gastric bypass and gastric sleeve surgeries, a candidate must meet eligibility requirements such as being 100 pounds or more and being unable to lose weight through diet and other means. Some other conditions include being extremely obese, as defined by BMI standards, or the candidate must have weight-related health issues, according to WebMD.
To be considered for gastric sleeve surgery, a screening process that includes meeting certain weight guidelines is required. Being extremely obese can mean having a body mass index (BMI) that is 40 or higher. A candidate with a BMI of 35 to 39.9 may be eligible for this surgery if there is a serious condition related to obesity, such as diabetes, hypertension or sleep apnea, according to Mayo Clinic. The candidate must also show that different conventional measures, such as diet and exercise, were not successful for weight loss.
Even if these requirements are met, other imposed guidelines must also be met to qualify for this type of surgery. This can include evaluation of weight history, mental health and an underlying serious medical condition that can affect the outcome of bariatric surgery, states Mayo Clinic. Age is another factor that is considered in the screening process.
Gastric sleeve surgery is one type of bariatric surgery that involves reducing the size of the stomach to restrict the amount of food a patient can eat. This surgery entails the surgical removal of the left part of the stomach with the exception of the pylorus, notes Spectrum Health.