What qualifies you for bariatric surgery?
Bariatric surgery requirements begin with establishing a diagnosis of class III obesity. That means that you either:
- Have a BMI of 40 or higher. The Body Mass Index (BMI) is a way of estimating how much body fat you have based on your height-to-weight ratio. A score of 40 or higher is associated with a high risk of related diseases. It usually equates to about 100 lbs. overweight.
- Have a BMI of at least 35 and at least one related health problem. A BMI of 35 without a related health problem is considered class II obesity.
The criteria are slightly higher for adolescents. An adolescent may be a candidate if they have:
- BMI of at least 40 and an obesity-related medical condition.
- BMI of at least 35 and a severe obesity-related medical condition.
While BMI is easily measured, you may have to take some medical tests to diagnose your obesity-related health conditions.
Common myths about bariatric surgery
- That surgery is a last resort. Bariatric surgery is the most effective long-term treatment for class III obesity. When studied scientifically, diet and exercise — alone or in combination with medications — are much less effective over the long term.
- That surgery is the “easy way out.” Bariatric surgery can be thought of as a tool that allows a healthy diet and lifestyle to lead to sustained weight loss. Often, patients have made these changes before without long-term success. Surgery allows those changes to be effective.
What’s involved in preparation for bariatric surgery?
Before scheduling your bariatric surgery, your healthcare provider will want to ensure that you’re physically and mentally fit for the surgery. You’ll meet with a team of specialists who will counsel you about the risks and benefits while evaluating your physical and mental health.
You may need to pass medical screening tests to make sure the surgery is safe for you. If you use tobacco, drugs or excessive alcohol, you’ll be required to quit before qualifying for surgery. Your healthcare team can help you with this.
Your surgeon may also ask you to follow a pre-bariatric surgery diet for a few weeks to prepare for your operation. This is to reduce the fat inside your abdomen, where the operation will take place, making the operation safer and reducing the risk of complications. Your surgeon will give you specific guidelines to follow.
How is weight loss surgery performed?
Weight loss surgery is usually performed through minimally invasive methods (laparoscopic surgery). That means small incisions, faster healing and less pain and scarring than you would have with traditional open surgery. Very rarely, some patients are better treated with open surgery due to their specific conditions.
What are the different types of bariatric surgery?
Gastric sleeve
The gastric sleeve, also called sleeve gastrectomy, is the most commonly performed bariatric surgery in the U.S. This may be because it’s a relatively simple procedure that’s safe to perform on most people with little risk of complications. The gastrectomy simply removes a large portion of your stomach — about 80% — leaving behind a small, tubular portion, like a sleeve. This naturally reduces the amount of food you can consume in one sitting and makes you feel fuller faster. But it also reduces the hunger hormones that are normally produced in your stomach. This helps to stabilize your metabolism, decreasing your appetite and regulating your blood sugar.
Gastric bypass
The gastric bypass is also known as the “Roux-en-Y,” which is a French term meaning “in the form of the letter Y.” With this procedure, your small intestine will end up in that form. First, surgeons create a small pouch at the top of your stomach, separating it from the lower portion with surgical staples. Then they divide your small intestine and bring the new segment up to connect to the stomach pouch. Food will now flow through the new, smaller stomach and lower segment of your small intestine, bypassing the rest. This restricts how much your stomach can hold and also how much nutrition your small intestine can absorb. Restricting the small intestine makes this method more effective than gastric restriction alone.
Biliopancreatic Diversion with Duodenal Switch (BPD-DS)
This is the original version of the duodenal switch, an operation that combines a sleeve gastrectomy with an intestinal bypass. (It sometimes goes by a shorter name: Gastric Reduction Duodenal Switch). It’s similar to the Roux-en-Y gastric bypass but more extreme. This operation bypasses most of your small intestine — about 75%. This significantly reduces the hunger hormones produced in your small intestine as well as in your stomach. It also significantly restricts how much nutrition your small intestine can absorb. This is what makes the duodenal switch the most effective surgery for weight loss and for improving metabolic syndromes like diabetes. But it can also make it hard for your body to absorb enough nutrients to stay healthy.
Stomach Intestinal Pylorus Sparing Surgery (SIPS)
This newer procedure is a modified version of the original duodenal switch, intended to reduce complications. It also goes by the names Loop Duodenal Switch or SADI-s. Early results are still being studied, but so far it appears promising that this version may eventually replace the original duodenal switch. Like the original, it begins with a sleeve gastrectomy, then divides the first part of the small intestine just after the stomach (the duodenum). This time, the small intestine is reattached as a loop, which requires just one surgical connection (anastomosis) instead of two. It also means that less of the small intestine is bypassed, allowing for a little more absorption of nutrients.
What kind of postoperative care will I have after weight loss surgery?
During the first year after your surgery, your healthcare provider will see you regularly for follow-up visits and testing. They will take metabolic blood tests to monitor how your health is improving and screen for any nutritional deficiencies. After the first year, if you’re in good health and have lost a lot of weight, you may want to discuss body contouring options with your healthcare provider. Body contouring can help remove excess skin folds and tighten loose tissues.
How much weight do you lose with bariatric surgery?
Most people — about 90% — lose about 50% of their excess weight after bariatric surgery, and keep it off. Different procedures have slightly different results. The average weight loss after gastric bypass is about 70% of excess body weight. After a duodenal switch, it’s about 80%. Weight loss after sleeve gastrectomy ranges between 30% and 80%. These results are measured after a period of 18 to 24 months.
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