Stomach Intestinal Pylorus Sparing Surgery, also known as SIPS surgery, is a single-anastomosis modified duodenal switch surgery. Compared with other weight loss surgical procedures, such as gastric band, sleeve, or roux en y gastric bypass surgery, SIPS is relatively new. It is however, another exciting weight loss surgical correction procedure for morbidly obese patients with good early results. The procedure allows patients to achieve long term fat loss through lesser food consumption and neuroendocrine changes. Continuing the discussion, we look at the various aspects of SIPS bariatric surgery. Read on.


The SIPS Gastric surgery procedure is similar to a duodenal switch operation, except only one transverse cut is made to the small intestine instead of two. SIPS surgery involves creating a sleeve , just like sleeve gastrectomy only slightly larger. The surgeon also bypasses the upper half of the small intestine, at approximately 300 cm from the ileocaecal valve, and sutures the 1st part of Duodenum beyond the pylorus to the bypass point. Post surgery, the stomach’s capacity is restricted to approximately 120 ml, which means you will feel satiated after consuming only 3 to 4 ounces of food.

How it works

SIPS weight loss surgical procedure preserves vital functional elements of the stomach, such as the antrum (pump-like structure that pushes food through the bottom valve of the stomach), and the pylorus (the opening from the stomach into the small intestine). Instead of strict diet requirements post surgery, patients can enjoy smaller portions of their favorite foods and feel satiated, without any “dumping” syndrome. In addition, surgeons re-route the intestines so as to induce neuroendocrine reflexes that cause automatic weight loss. The upper half of the small intestine, after surgery, only carries digestive juices, including bile and pancreatic juices. A shorter digestive channel helps reduce weight gain through a reduction in calorie absorption.


SIPS weight loss surgery nullifies various contingencies experienced by patients who have undergone gastric bypass surgery, including:

  • Marginal ulcers at the upper joint
  • Dumping syndrome
  • Unstable fluctuations in blood sugar levels, and,
  • Excessive intolerance for specific food items

Post Surgery Experience

The expected average weight loss for patients who have undergone SIPS is similar to that in duodenal switch surgery, but more than that of gastric bypass or gastric sleeve surgery. However it is slower and more gradual. SIPS has a better complication profile, and better initial results than other weight loss surgeries. The surgery is therefore, most suitable for sleeve patients who have regained weight, and those with morbid obesity and a severe metabolic syndrome.

Wrapping Up

SIPS weight loss surgery helps patients attain significant weight loss in shorter timelines, post surgery. Patients do not experience dumping syndrome, ulcers, or other common side effects of bypass surgery. To learn more about SIPS weight loss procedure, schedule a consultation with our expert surgeons at Perth Surgicals and Bariatrics. Simply fill out our contact form and we will take it from there. You can also call us at 08 6558 1901.

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