The ultimate measure for any weight loss surgery program is its record of actual patient outcomes – weight loss results and complication statistics. This is particularly important given that the published weight loss surgery literature shows that patient outcomes are highly variable between individual surgeons and programs.*

Our Weight Loss Surgery Patient Outcomes

Dr. Oliak has a 17-year track record of excellent, industry-leading patient outcomes, as highlighted below:*

Gastric Sleeve Weight Loss

Industry average gastric sleeve weight loss is approximately 55-60% of excess weight (reference) at 1-3 years after surgery.* Dr. Oliak’s gastric sleeve patients average 74-77% excess weight loss at 1-3 years after surgery.

Dr. Oliak’s gastric sleeve patients, on average, lose 31% more weight than the industry average patient.*

More About Gastric Sleeve

Gastric Sleeve Leak Rate

The most feared complication after gastric sleeve surgery is leak. Leak rates vary between experienced bariatric surgeons, according to published studies (reference), from 0 in >500 operations, to approximately 1 in 25 operations (0-4%). Less experienced bariatric surgeons are reported to have leak rates as high as 7%.*

The industry average bariatric surgeon leak rate, according to several large review studies (reference), is somewhere in the 1-2.5% range.* Dr. Oliak’s gastric sleeve leak rate is 0%.*

Dr. Oliak’s gastric sleeve leak rate of 0% is significantly lower than the industry average leak rate.*

More About Gastric Sleeve

30-Day Serious Complication Rate

A recent large, high-quality study reported that 30-day complication rates for serious complications varied 17-fold (yes, 17-fold!) across 165 bariatric surgery center of excellence programs nationwide, from 0.6% to 10.3% (reference).*

This study was an eye-opener when it was published in 2017. A 17-fold difference in complication rates across weight loss surgery programs nationwide was a shocking finding. What it shows is that choice of surgeon and program matters – a lot!

Using the same methodology and dates as in this study, Dr. Oliak’s 30-day serious complication rate is 0.6%.* This statistic ranks among the best 30-day serious complication rates in the study quoted above.

10-Year Gastric Bypass Weight Loss

The few good published studies on gastric bypass weight loss at 10+ years after surgery report an average of approximately 55-60% excess weight loss (reference).*

Dr. Oliak’s gastric bypass patients average 65% excess weight loss at 10 years after surgery.*

More About Gastric Bypass

* Patient results vary after weight loss surgery. Past results do not guarantee future results.

  • 75%
    our excess weight loss 1 year after sleeve*
  • 0%
    our gastric sleeve leak rate*
  • 76%
    our excess weight loss 1 year after bypass*
  • 65%
    our excess weight loss 10 years after bypass*
  • <0.1%
    our gastric bypass leak rate*
Dr. Oliak’s Blog

Orange County bariatric surgeon Dr. Oliak

How to Choose the Best Weight Loss Surgery for You

Choosing the weight loss operation best suited for you typically means choosing between the sleeve gastrectomy operation and the gastric bypass operation. These two operations are by far the most popular weight loss operations performed in the United States. Before we discuss the strengths and weaknesses of the gastric sleeve and


Gastric Sleeve Surgery for Patients with Low Initial BMI (BMI 30-35)

I recently wrote a post entitled “Weight Loss Surgery for Low BMI Patients (BMI 30-35).” In this post I reviewed the guidelines published by the ASMBS for weight loss surgery for low BMI patients, and I reviewed some recent published studies on weight loss surgery for low BMI patients. In


Schedule a Private Consultation with Dr. Oliak

Learn more about weight loss surgery and our Orange County weight loss surgery program by attending a private educational consultation with Dr. Oliak in Brea or Irvine. Call our office or send us a contact form today!

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