Balloon vs Sleeve vs Gastric Bypass: Criteria and Safety

Balloon vs sleeve vs gastric bypass is a choice about how much weight must be lost and how much relapse is acceptable. Dr. Rakesh Durkhure, Head - General, MI & Bariatric Surgery (Unit IV), Artemis Hospitals, Gurugram, India, reports that weight returns in 80% of balloon patients, about 40% of sleeve patients complain of relapse after two years, and hardly 5 to 10% after a gastric bypass.

This article sets out who qualifies for bariatric surgery, how the three procedures differ, and what makes the operation safe. It belongs to a three-part series: the complete guide to obesity and metabolic syndrome covers diagnosis and referral, and the type 2 diabetes article covers metabolic results and cost.

Who qualifies for bariatric surgery

On Dr. Durkhure's criteria, a patient qualifies for bariatric surgery with a BMI above 40, a genuine prior attempt at weight loss, a motivated mindset, an age of 18 to 65 or 70, no psychological disorder and no active cancer. Bariatric surgery is surgery on the stomach or intestine designed to produce lasting weight loss and to treat the diseases that obesity causes. Dr. Durkhure begins selection with motivation: a patient who is obese and unhappy with it, or who is content but carries diabetes, hypertension, breathlessness or sleep apnoea, is a candidate; a patient who is content and well is not.

His formal criteria, as presented in the session, are:

• Body mass index (BMI) above 40. BMI is weight in kilograms divided by the square of height in metres.
• A genuine prior attempt at weight loss, by any method, for around three months.
• A positive, motivated mindset.
• Age between 18 and 65 or 70.
• No psychological disorder that would undermine recovery.
• No active cancer or other malignancy.
• Fitness for surgery overall.

Current international guidance sets a lower bar than a BMI of 40. The 2022 joint guideline of the American Society for Metabolic and Bariatric Surgery (ASMBS) and the International Federation for the Surgery of Obesity and Metabolic Disorders (IFSO) recommends surgery at a BMI of 35 or above regardless of other disease, and supports considering it from a BMI of 30 in people with metabolic disease such as type 2 diabetes. Because Asian populations develop metabolic disease at a lower BMI, the same guideline lowers these thresholds for them. For referring doctors, the practical reading is that a BMI above 40 is a clear indication, and that a patient with a BMI in the mid-30s and uncontrolled diabetes is also worth referring for assessment.

Restrictive vs malabsorptive bariatric surgery

Bariatric operations cause weight loss in one of two ways: they restrict how much the patient eats, or they reduce how much is absorbed. Dr. Durkhure classifies them accordingly.

• Restrictive procedures limit how much the patient can eat. Sleeve gastrectomy, gastric banding and gastric plication belong here.
• Malabsorptive procedures reduce how much of what the patient eats is absorbed. The patient can eat a somewhat larger amount than after a restrictive operation, but loses more weight.

His summary for the audience was simple: after a restrictive operation the patient cannot eat more; after a malabsorptive operation the patient loses more. Gastric bypass combines both effects, together with hormonal changes that drive its effect on diabetes, explained in the type 2 diabetes article.

Intragastric balloon: results and limits

An intragastric balloon is a temporary device that occupies space in the stomach so that the patient feels full sooner. In the version Dr. Durkhure showed, the patient swallows a capsule, the balloon is then inflated to a volume of about 500 ml, and it stays in the stomach.

By his figures, a balloon removes about 15 to 20% of a patient's excess body weight. Its limitation is durability. Because the balloon must come out after four or six months, relapse is very high: in his experience, the weight comes back in 80% of cases. That makes the balloon a temporary measure rather than a durable treatment.

Sleeve gastrectomy for moderate weight loss

Sleeve gastrectomy is a laparoscopic operation in which most of the stomach is removed. A surgical stapler divides the stomach along its length and the large outer portion is taken out, leaving a narrow tube. As a general reference, a sleeve removes roughly three-quarters or more of the stomach.

Dr. Durkhure positions the sleeve for patients who want to lose about 30 to 40 kg. It is a restrictive operation and reduces how much the patient can eat. Its weakness is relapse: by his account, about 40% of sleeve patients complain of weight regain after two years. Weight regain and revision after a sleeve, and the comparison with a mini gastric bypass, are covered in detail in his later masterclass: see sleeve gastrectomy vs mini gastric bypass.

Gastric bypass: the most durable result

Gastric bypass gives the most durable weight loss of the three operations. In a Roux-en-Y gastric bypass, the surgeon creates a small stomach pouch and joins it directly to a loop of small intestine, so that food bypasses most of the stomach and the first part of the intestine. The operation restricts intake, reduces absorption and changes the gut hormones that control appetite and blood sugar.

The relapse figure is what sets it apart. By Dr. Durkhure's account, hardly 5 to 10% of gastric bypass patients complain of weight regain. On the outcome slides he presented, gastric bypass also outperformed sleeve gastrectomy on excess weight loss (the proportion of surplus weight above a healthy weight that is lost), blood fats, diabetes and blood pressure. His rule of thumb: bypass is the better choice when a patient weighs more than about 125 kg.

Balloon vs sleeve vs gastric bypass compared

The table sets the three options side by side, using the figures Dr. Durkhure gave in the session. Relapse was also among the questions doctors raised in the Live Discussion from this masterclass.

The bariatric surgery team

Bariatric surgery at Artemis Hospitals is delivered by a multidisciplinary team, not by the surgeon alone. "It is not my only job," Dr. Durkhure told the audience. Each patient is managed by:

• an endocrinologist for diabetes;
• a chest physician for sleep apnoea;
• a dedicated obesity dietitian who plans food requirements before and after surgery;
• a physiotherapist;
• a psychologist, who looks after the patient's mental health and works to prevent depression;
• and, last, the surgeon, who operates with the support of the whole team.

The structure reflects the condition. A patient with metabolic syndrome has problems in several organ systems, and each needs optimising before and after the operation.

Is bariatric surgery safe? Complications and safeguards

Dr. Durkhure reported that his team has not seen a leak, a venous blood clot, a bowel obstruction or dumping syndrome in its patients. Leaks from staple lines, venous thromboembolism (blood clots in the leg veins that can travel to the lungs), bowel obstruction and dumping syndrome (rapid passage of sugary food into the intestine, causing faintness, sweating and diarrhoea) are recognised risks of bariatric surgery in general, which is why his record on all four matters.

Dr. Durkhure attributes his leak and hernia record to two specific safeguards.

• An intraoperative leak test. During the operation, the team tests for any leak. Dr. Durkhure said none has been seen.
• Closing every potential internal hernia site. An internal hernia occurs when a loop of bowel slips through a gap in the mesentery created by rerouting the intestine during a bypass. Asked about this risk, he said that in his practice his team repairs all the possible sites, every time, and that he has never seen an internal hernia.

He added a practice that supports follow-up abroad: he records a video of each operation and gives it to the patient, so that the referring doctor, or any gastrointestinal surgeon in the patient's home country, can see exactly what was done.

Vitamin and protein deficiency after bariatric surgery

The main complications Dr. Durkhure does see are mild vitamin or protein deficiencies. In his experience these occur mainly in Indian patients, many of whom are vegetarian. African patients who eat meat or fish at lunch, dinner or breakfast rarely develop them, so these complications are uncommon in his African patients. Long-term vitamin supplementation after bariatric surgery is standard practice everywhere, alongside a protein-rich diet.

Surgeon experience, operating time and hospital stay

Dr. Durkhure reported about 560 weight loss operations in total, including about 200 sleeve gastrectomies. He described the operation as taking about an hour, with almost no blood loss and a hospital stay of one to two days, and said none of his patients has needed the intensive care unit. His team has operated on patients weighing from about 100 kg up to 227 kg.

For the metabolic results and the cost of a gastric bypass, see the type 2 diabetes article and the bariatric surgery cost page. Dr. Durkhure's profile is on the doctor page, and the wider specialty is on the general and bariatric surgery hub.