What is a SASI S Gastric Bypass? By Gerald Witt on March 01, 2023

Sasi S Bypass

Many people consider Weight Loss Surgery when they are more than 100 pounds overweight, and many patients consider the various options that they know exists for weight loss surgery.

There are four main types of Weight Loss Surgeries:

+ Gastric Bypass or Mini Gastric Bypass

+ Gastric Sleeve

+ Lap Band

+ Duodenal Switch

One of the newer forms of Gastric Bypass and a new surgery available here in Puerto Vallarta is known as the SASI S Bypass.  The Sleeve Gastrectomy with Loop Bipartition is also known as the Single Anastomosis Sleeve Ileal Bypass and as such known as the SASI S Bypass.

Here in Puerto Vallarta, Weight Loss Team, the bariatric surgery center at the CMQ family of Hospitals is the only bariatric practice performing this procedure, and Dr. Jorge Arturo Parra who is the lead bariatric surgeon for Weight Loss Team and who has an advanced certification and Master’s Degree from the University Autonima in Barcelona Spain in endoscopic and laparoscopic surgery applied to bariatrics feels this surgery is perfect for many patients looking to lose 100 or more pounds while not having to give up the complete absorption deficiencies that accompany the RNY Gastric Bypass or even the mini bypass.

Benefits of the SASI S Bypass Surgery:

  • It gives patients an opportunity to lose the weight they need to lose
  • It provides the patient with similar results to an RNY but with less malabsorption.
  • The surgery removes the hunger hormone ghrelin from the body
  • The patient can have endoscopic procedures done post surgery.
  • It resolves obesity related comorbidities
  • The surgery helps treat medical diseases related to obesity such as Type 2 diabetes, hypertension, sleep apnea, fatty liver disease, joint pain and even hyperlipidemia).

How the SASI S is performed:

Step 1:  The doctor creates a gastric sleeve for the patient and here in Puerto Vallarta at Weight Loss Team, the surgical team ensures the size of the sleeve by also creating a double buttress to lock in the size of the sleeve, and to prevent leaks and bleeding.

Step 2: Measuring the small intestine.  Here with the SASI S Bypass the doctor will start the count and work his or her way up from the colon, bypassing between 2.5 and 3 meters from the colon up.  (For the RNY bypass, the count is from the stomach down and about 1.5 meters is bypassed).  With the SASI S more of the intestine is bypassed, and the real benefit is that there is only 1 single Anastomosis or connection.

Step 3: Making the connection with the small intestine and the sleeve.  At Weight Loss Team we make sure to double suture the anastomosis to ensure a proper seal.

Step 4: Performing the Blue Dye Test to ensure there are no leaks.

The real benefit to the SASI S is the patient will consume less amounts of food similar to a sleeve patient, and have the benefit of the hunger hormone grehlin being removed, while also having the benefit of a gastric bypass.  With the SASI S about 75% of the food consumed is bypassed and about 25% of the food is absorbed like normal by the body.  Also since there is no real pouch the patient can have endoscopic procedures down the road and the camera should have no issues going into the intestine, something that is not possible with the gastric bypass nor mini bypass.

This surgery is being studies worldwide from Australia to Europe and Mexico and is one of the newer options for weight loss now available today.  Here in Puerto Vallarta at Weight Loss Team you can have a SASI S Bypass for the exact same price as a normal RNY Gastric Bypass.


Of course, Weight Loss Team, and its staff of experts will be more than ready to guide you through your weight loss journey and help you be successful with your SASI S Bypass as well any other bariatric surgery options you may need. If you have any further questions, please feel free to contact us.


For more information:



Telephone: Toll free  1(800) 404-9064 or + 1(818) 949-6911

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The Weight Loss Team Staff

The Weight Loss Team

The Weight Loss Team in Puerto Vallarta is dedicated to the continued weight loss success of every patient. Through our state-of-the-art technology, advanced techniques, and easy access to online support, patients can expect successful weight loss surgery that creates lasting results. Patients travel from around the world to our practice to experience:

  • State-of-the-Art Facilities
  • Experienced Surgeons
  • Multiple Surgical Options
  • Advanced Laparoscopic Methods
  • Affordable Care
  • Life-Changing Results

If you're ready to lose weight and sustain a healthy, happy lifestyle, contact our Puerto Vallarta practice by filling out our online form or calling 800-404-9064.

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