About Gastric Bypass

Gastric bypass involves creating a very small pouch (about 1 ounce) from the upper part of the stomach, and making a small connection (less than 1/2 inch diameter) between the stomach pouch and the intestine. Another intestinal connection is also made so that the bypassed stomach has a way to empty.

The gastric bypass operation is done laparoscopically, generally using 5 small incisions. The operation typically takes 1.5-2 hours. Patients typically stay in the hospital for 1-2 days, and return to work in 2-3 weeks. Recovery is usually rapid because of the minimally invasive, laparoscopic approach.

Patients remain on a liquid diet for 3 weeks after surgery, and then slowly transition onto solid foods. Meal portion sizes are typically 2-4 ounces when patients start food, and slowly increase in size to approximately 6-8 ounces over the first 1 year.

Gastric Bypass Orange County

Gastric bypass operation

Gastric Bypass Weight Loss

Gastric bypass typically results in excellent weight loss – the better studies report an average of 70-80% excess weight loss after surgery. Long-term studies (10+ years) show that patients, on average, maintain the majority of their initial weight loss over time.*
More about gastric bypass weight loss

Gastric bypass causes weight loss by restricting food intake and by altering the biology of weight regulation by resetting the body weight “set-point” to a lower weight.*

Resetting the body weight set-point to a lower weight is the key to why gastric bypass works as well as it does. This is what makes long-term maintenance of weight loss possible after surgery. Because nonsurgical weight loss methods don’t change the body weight set-point, long-term maintenance of weight loss after diet and exercise programs is virtually impossible.*
More about how surgery works

About Our Program

Dr. Oliak and his Orange County gastric bypass program prioritize high-quality gastric bypass surgery and comprehensive patient care (our program). The best measure of performance is actual patient outcomes – since 2002 our gastric bypass weight loss statistics and complication statistics (leak rate, early postoperative serious complication rate) have beaten the published averages (our outcomes).*

To learn more about gastric bypass surgery and our Orange County gastric bypass program, schedule a free no-obligation consultation in Brea or Irvine with Dr. Oliak today!*

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Why Choose Gastric Bypass?

Gastric bypass is the most established and best studied of the weight loss operations. Its safely and effectiveness have been proven over more than 40 years. For this reason the gastric bypass operation is generally considered to be the gold standard operation for weight loss.

The most popular operation for weight loss currently is sleeve gastrectomy. Compared to the gastric bypass operation, the gastric sleeve operation is less invasive, and therefore associated with less risk. In several situations, however, the gastric bypass is generally considered the better choice:

Gastric bypass is the best operation for diabetes. Studies show that gastric bypass induces remission of diabetes (i.e. normal blood sugar without medication) in up to 80% of patients. Usually patients can discontinue their diabetes medications immediately after surgery.

Chronic/Severe GERD
Gastric bypass resolves gastro-esophageal reflux disease (GERD) in almost all patients. Sleeve gastrectomy can make GERD worse in certain situations. In cases of long-standing chronic GERD or hiatal hernia, gastric bypass may be a better choice.

High BMI
Many surgeons favor gastric bypass for patients with an initial body mass index (BMI) of greater than 50 because studies suggest that BMI > 50 patients typically lose more weight with gastric bypass than with sleeve gastrectomy.

Gastric Bypass Orange County – Am I a Candidate?

Gastric bypass Orange County candidates are generally at least 75-100 pounds overweight (BMI 35 or greater), and have tried and failed to lose weight and keep it off. Insurance companies generally require patients in the BMI 35-40 range to have other medical problems, such as diabetes, high blood pressure, or sleep apnea.
Calculate body mass index (BMI)

Good gastric bypass candidates also understand that surgery is a tool to help with weight loss, not a cure for obesity. Good candidates understand the necessary changes they need to make in their eating/exercise habits after surgery, and are willing/capable of making these changes.

Gastric Bypass Orange County – What Are the Risks?

Potential early postoperative complications after gastric bypass include blood clots and leaks. The risk for blood clots and leaks can be minimized with quality surgery and good patient care, but not completely eliminated. Potential long-term risks include nutritional deficiencies, bowel obstructions, ulcers, etc.
More about outcomes

* Patient results vary after weight loss surgery. Individual patients can do better or worse than the average.

  • 1.5-2 hours
    typical surgery duration*
  • 1-2 days
    typical hospital stay*
  • 1-3 weeks
    typical return to work*

Gastric Bypass before & after

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  • Tami
  • Procedure:Gastric Bypass
  • Weight Lost: 75 lbs
  • Excess Weight Lost: 85%
  • Disclaimer: Individual results vary
I had gastric bypass 8 years ago with Dr. Oliak and I would do it again tomorrow. It was the…
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Learn more about gastric bypass and our Orange County program

Schedule a free, no-obligation consultation with Dr. Oliak in Orange County – Brea or Irvine – today!

Free Consult


Free Consult

Call 714-582-2530 or submit the following information to request a free consult. If you have insurance coverage for weight loss surgery (or are self-pay), and you meet the BMI criteria for surgery, we will schedule you for a 30-40 minute educational consultation with Dr. Oliak.

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