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Talk to your doctor. Find out if you meet the initial qualifications. Undergo an extensive health screening. Follow pre-surgery instructions Undergo gastric bypass surgery. Follow all post-surgery guidelines.
Gastric bypass surgery limits the amount of food a person can physically tolerate. This surgery can cause rapid weight loss, thereby reducing the amount of fat in the pancreas. Gastric bypass, however, can pose both short-term and long-term risks. Discuss these with your doctor.  Short-term risks include: excessive bleeding, infection, adverse reactions to anesthesia, blood clots, problems with breathing, leaks in your gastrointestinal system, and in rare cases, death. Long-term risks include: bowel obstruction, dumping syndrome (which causes diarrhea, nausea, and vomiting), gallstones, hernias, hypoglycemia (low blood sugar), malnutrition, stomach perforation, stomach ulcers, vomiting, and in rare cases, death. In order to be considered for a gastric bypass, you must either have a body mass index (BMI) of more than 40, or have a BMI of at least 35 and a weight-related condition (like type 2 diabetes). In some cases, a person with a BMI of 34 or lower may be considered if their weight is creating serious problems with their health. Before your doctor can approve you for this surgery, you will have to undergo a series of in-depth medical tests, and in some cases, have a psychological evaluation. This is done to ensure that you are physically and emotionally strong enough to handle the surgery. . Depending on your specific health needs, your doctor may ask you to do several things prior to your surgery. Your doctor may ask you to:  Restrict your eating and drinking Stop taking certain medications Stop smoking Begin a physical activity program When you have gastric bypass surgery, you will be placed under anesthesia. The surgeon will make a small incision in your abdomen and insert laparoscopic tools. The surgeon will then place an inflatable band around the uppermost part of your stomach. In most cases, you will spend 1 night in the hospital. Immediately following your surgery, you won't be able to eat for a period of 2 days, in order to let your stomach heal. After this, you will begin eating liquids, then move on to pureed foods, and finally onto solid foods. You will be expected to follow a restricted diet for at least 12 weeks. Maintain all scheduled follow-up appointments.