About Weight Loss Surgery Outcomes

Weight loss surgery is by far the most effective method available for long-term weight loss. Patient outcomes, however, are not uniform between individual surgeons and programs. Some surgeons and programs achieve better weight loss results and lower complication rates than others.*

The complication rate for serious complications after weight loss surgery, for example, was found in a recent study (Ibrahim et al, JAMA Surg 2017) to vary 17-fold (yes, 17-fold), from 0.6% to 10.3%, across 165 accredited bariatric surgery Center of Excellence programs nationwide.*
More about this study

Similarly, studies published by different surgeons report widely different average weight loss results, and widely different complication rates (e.g. leak rate) after both gastric sleeve and gastric bypass surgery, ranging from excellent to poor.*

Why the wide disparity in patient outcomes between different surgeons and programs? Because different surgeons/programs have different skill/experience levels, and different surgeons/programs do the operations and patient care in different ways.

What the published literature makes clear is that surgical technique and patient care have a major impact on patient outcomes.*
Outcomes vary between surgeons

Our Weight Loss Surgery Outcomes

Dr. Oliak’s #1 goal since starting his practice has been to achieve the best outcomes possible for his patients. By always prioritizing excellent surgery and patient care, Dr. Oliak has established a long record (>2500 operations since 2002) of weight loss surgery outcomes – weight loss results, complication statistics – that rank among the best in the weight loss surgery field.*
About our program

Gastric Sleeve Weight Loss

Dr. Oliak’s gastric sleeve patients average 75-80% EWL (excess weight loss) at 1-3 years after surgery. Published studies report overall average gastric sleeve weight loss to be approximately 60% EWL (Gagner et al) at 1-3 years after surgery.*
More about gastric sleeve
Blog post – gastric sleeve weight loss

Gastric Sleeve Leak

The most feared complication after gastric sleeve surgery is leak. Dr. Oliak’s gastric sleeve leak rate is 0%.** Individual surgeons report leak rates to be as low as 0% and as high as 9%.** A comprehensive review study (Aurora et al) on gastric sleeve leak reported average surgeon leak rate to be 2.4%, with individual surgeon leak rates of 0-7%.**
More about gastric sleeve
Blog post – gastric sleeve leak

Serious Complications

The JAMA study quoted above (Ibrahim et al) found that the rate of serious complications after weight loss surgery varied between 0.6% and 10.3% across 165 different accredited bariatric surgery Center of Excellence programs nationwide. Using the same methodology and dates as in this study, Dr. Oliak’s serious complication rate is 0.6%.*
More about JAMA study

Gastric Bypass Weight Loss

Dr. Oliak’s gastric bypass patients average 65% EWL (excess weight loss) at 10 years after surgery. The few good published studies on long-term gastric bypass weight loss report an average of 55-60% EWL at 10+ years after surgery (Pories et al).*
More about gastric bypass

* Patient results vary after weight loss surgery. The weight loss outcomes quoted on this page are averages – individual patients can lose more or less weight than the average.

** Leaks can occur after gastric sleeve surgery. Past leak rates may not be indicative of future leak rates. Dr. Oliak’s 0% leak rate statistic applies to primary (non-revision) sleeve gastrectomy, primary (non-revision) laparoscopic gastric bypass, LAP-BAND® conversion to sleeve gastrectomy, and LAP-BAND® conversion to gastric bypass.

  • 0%
    leak rate**
  • 76%
    excess weight loss 1 year after sleeve*
  • 65%
    excess weight loss 10 years after bypass*

Learn more about weight loss surgery and our program

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

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