Weight Loss Surgery

Bariatric and Metabolic Surgery Center

For those who have been unsuccessful in all attempts to lose weight and are seeking a surgical option, St. Mary's Bariatric and Metabolic Surgery Center offers several laparoscopic, or minimally invasive, surgical procedures:

  • Roux-en-Y gastric bypass
  • Gastric banding
  • Sleeve gastrectomy, with or without duodenal switch
  • Biliopancreatic diversion with duodenal switch (BPD/DS)

St. Mary's also performs problem assessment and revisional or repair surgery for those experiencing difficulties following bariatric surgery at another facility.


Is weight loss surgery right for you?

Attend a free seminar to find out. Go to For Patients & Visitors, select Classes, then select Weight Loss Surgery Options at St. Mary's Hospital from the Event Title drop down menu. Or call 970-298-6417 for more information.


Roux-en-Y gastric bypass

The Roux-En-Y gastric bypass procedure helps patients lose weight two ways - by reducing the size of the stomach and by limiting the nutrients the intestines can absorb. The surgeon divides the stomach, creating a pouch about the size of a small egg that feels full after eating a small amount of food. The larger portion of the stomach and a portion of the small intestine are bypassed and reconnected in a Y-shaped configuration. The shortened length of intestine absorbs fewer calories and nutrients.


Gastric banding

Laparoscopic adjustable gastric banding restricts or reduces the size of the stomach without cutting it. The surgeon places a silicone band around the top part of the stomach, dividing it in two. The smaller part holds the food eaten and the patient feels full quickly. The rest of the stomach still secretes the fluids that aid digestion. Later the doctor can loosen or tighten the silicone band according to weight loss progress and the sensation of fullness.


Sleeve gastrectomy (with or without duodenal switch)

Sleeve gastrectomy is a restrictive bariatric procedure that permanently reduces the size of the stomach by about 85 percent. The larger, rounded part of the stomach is removed, leaving a small sleeved-shaped portion about the size and shape of a banana. Though the stomach is smaller, digestion and absorption of nutrients go on as normal. Some patients may also have duodenal switch surgery which reduces absorption of calories and nutrients by shortening the length of intestine that food passes through.


Biliopancreatic diversion with duodenal switch (BPD-DS)

BPD-DS is a weight loss surgery procedure with both restrictive and malabsorptive aspects. A portion of the stomach is removed, restricting the amount of food the stomach can hold so the patient feels full quickly. A portion of the small intestine is rerouted, reducing the amount of time the body has to capture calories and absorb fat.


A system of care, not just surgery

St. Mary's offers all options of bariatric surgical procedures performed by board-certified, bariatric-trained surgeons. Our comprehensive program allows each patient and their doctor to determine which procedure is right for them. Patients can have their surgery close to home with direct access to St. Mary's complete program of pre- and post-operative care.

Surgery is only part of St. Mary's surgical weight loss program. Experience has shown that patients who are prepared, have realistic expectations and receive post-surgical follow up and support are more successful in losing weight, maintaining a healthy weight, and achieving overall improved health.


Before surgery

St. Mary's surgery preparation includes:

  • Patient and family education
  • Surgical evaluation 
  • Imaging and laboratory studies
  • Nutrition evaluation
  • Psychological evaluation
  • Medication and allergy review
  • Discussion of the patient's expectations
  • Referrals to primary and specialty care as needed


After surgery

Participation in the following post-operative services is a requirement of bariatric surgical treatment at St. Mary's Hospital.

  • Dietary consultation and nutritional support
  • Fitness consultation and customized exercise plan designed by an exercise physiologist
  • Personal and group training at St. Mary's fitness center
  • Weight loss surgery support group
  • Ongoing follow-up by surgical staff