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Mini Gastric Bypass (Omega-Loop)

One-Anastomosis Bariatric Surgery

Written by: Saygı Hospital Health Guide Editorial Board
Last updated:

This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.

References (5)

This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Genel Cerrahi department. Book Appointment →

What is Mini Gastric Bypass (Omega-Loop)?

Bariatric/metabolic surgery with single anastomosis between long narrow gastric pouch and small bowel.

Long lesser-curvature gastric tube (15-20 cm) restricts intake.

Biliopancreatic limb 150-200 cm bypasses to allow malabsorption.

Single gastrojejunostomy (vs two anastomoses in Roux-en-Y).

Shorter operative time, technically simpler than RYGB.

Symptoms

Targeted: morbid obesity (BMI >40 or >35 with comorbidities).
Type 2 diabetes mellitus (high remission rates).
Hypertension, dyslipidemia, OSA, NAFLD.
GERD: relative contraindication (potential bile reflux risk).

Risk Factors

Standard bariatric indications: BMI >40 or >35 with metabolic complications.
Failed medical/lifestyle weight loss.
Avoid in severe pre-existing GERD, Barrett's esophagus.
Adequate cardiopulmonary status for surgery.

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • BMI exceeding bariatric thresholds with comorbidities.
  • Failed comprehensive non-surgical weight management.
  • Bariatric multidisciplinary evaluation (psychologist, dietitian, endocrinologist, surgeon).
  • Consideration in T2DM patients (metabolic surgery).
  • Discussion of pros/cons vs sleeve gastrectomy and RYGB.

Treatment Methods

01
Preoperative: nutrition optimization, smoking cessation, EGD to evaluate GERD/Barrett's.
02
Laparoscopic technique standard; robotic feasible.
03
Long narrow gastric pouch created with linear stapler along lesser curvature.
04
Antecolic loop gastrojejunostomy 150-200 cm distal to ligament of Treitz.
05
Outcomes: %EWL 70-80% at 5 years, T2DM remission 70-80%.
06
Complications: bile reflux gastritis/esophagitis, marginal ulcer, anastomotic leak, internal hernia rare.
07
Lifelong nutritional supplementation: multivitamin, B12, iron, calcium, vitamin D.
08
Conversion to RYGB if symptomatic bile reflux develops.
09
Long-term follow-up with bariatric team; endoscopic surveillance recommended.

Which Department to Visit?

You can visit our Genel Cerrahi department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.