Clinical Specialties
Bariatric Surgery
Gastric Sleeve in Turkey (Sleeve Gastrectomy)
Meva Clinic Bariatric Care Team
Gastric Bypass in Turkey (Roux-en-Y)
Meva Clinic Bariatric Care Team
Gastric Balloon (Allurion)
Meva Clinic Bariatric Care Team
Gastric Botox Injection
Meva Clinic Bariatric Care Team
Bariatric Revision Surgery
Meva Clinic Bariatric Care Team
Hair & Brow Transplant
Meva Mixed Technique (Sapphire + DHI)
Meva Clinic Hair Restoration Care Team
Sapphire FUE Hair Transplant
Meva Clinic Hair Restoration Care Team
DHI (Direct Hair Implantation)
Meva Clinic Hair Restoration Care Team
DHI vs FUE Hair Transplant
Meva Clinic Hair Restoration Care Team
Unshaven Hair Transplant
Meva Specialist
Eyebrow Transplant (Meva Secret)
Meva Clinic Hair Restoration Care Team
Surgical & Specialist
Plastic Surgery
Piezo Ultrasonic Rhinoplasty
Meva Clinic Plastic Surgery Care Team
Vaser Liposuction (High-Def)
Meva Clinic Plastic Surgery Care Team
Double Chin Liposuction
Meva Clinic Plastic Surgery Care Team
Breast Augmentation (Implants)
Meva Clinic Plastic Surgery Care Team
Abdominoplasty (Tummy Tuck)
Meva Clinic Plastic Surgery Care Team
BBL (Brazilian Butt Lift)
Meva Clinic Plastic Surgery Care Team
Deep Plane Facelift
Meva Clinic Plastic Surgery Care Team
Blepharoplasty (Eyelid Surgery)
Meva Clinic Plastic Surgery Care Team
Mommy Makeover
Meva Clinic Plastic Surgery Care Team
Gynecomastia (Male Breast Reduction)
Meva Clinic Plastic Surgery Care Team
Otoplasty (Prominent Ear Surgery)
Meva Clinic Plastic Surgery Care Team
Arm & Thigh Lift (Brachioplasty)
Meva Clinic Plastic Surgery Care Team
Mastopexy (Breast Lift)
Meva Clinic Plastic Surgery Care Team
Mentoplasty (Chin Augmentation)
Meva Clinic Plastic Surgery Care Team
Labiaplasty (Aesthetic & Functional)
Meva Clinic Plastic Surgery Care Team
Anti-Gravity Lifting (Non-Surgical)
Meva Clinic Plastic Surgery Care Team
Andrology & Men's Health
Penile Lengthening (Ligamentolysis)
Meva Clinic Clinical Care Team
Penile Girth (Fat Grafting)
Meva Clinic Clinical Care Team
Non-Surgical Girth (HA Fillers)
Meva Clinic Clinical Care Team
Dermal Matrix Graft (Girth)
Meva Clinic Clinical Care Team
P-Shot (Regenerative PRP)
Meva Clinic Clinical Care Team
Glans Augmentation (PE Treatment)
Meva Clinic Clinical Care Team
ESWT Shockwave Therapy
Meva Clinic Clinical Care Team
Penile Prosthesis (Implant)
Meva Clinic Clinical Care Team
Meva Clinic Excellence
Meva Clinic provides hair restoration, dental care and selected outpatient treatments within its clinical care structure in Istanbul. Hospital-based procedures are performed by responsible specialist physicians at selected accredited partner hospitals, including JCI-accredited institutions where clinically appropriate.
Gastric Sleeve vs Gastric Bypass: Anatomical Differences, GERD Considerations & Eligibility
An authoritative medical comparison evaluating restrictive sleeve gastrectomy and metabolic Roux-en-Y gastric bypass according to ASMBS and NIDDK guidelines.
Selecting the appropriate bariatric surgery requires a comprehensive multidisciplinary clinical evaluation. While both Laparoscopic Sleeve Gastrectomy (LSG) and Roux-en-Y Gastric Bypass (RYGB) are evidence-based procedures established by the American Society for Metabolic and Bariatric Surgery (ASMBS) and the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), they function through distinct anatomical and physiological mechanisms. Meva Clinic coordinates comprehensive bariatric surgical pathways in accredited hospitals in Istanbul. Explore our dedicated procedure pages on gastric sleeve in Turkey, Gastric Bypass, Gastric Balloon, and Bariatric Hub.
Would you like a confidential medical review?
Share your treatment question with our international patient team. Suitability and treatment decisions are confirmed by the responsible licensed physician after clinical assessment.
Please do not send sensitive medical documents in your first message. Our team will explain the secure next step.
Anatomical and Physiological Mechanisms
Clinical Comparison: Sleeve vs Bypass
| Clinical Parameter | Gastric Sleeve (LSG) | Gastric Bypass (RYGB) |
|---|---|---|
| Anatomical Modification | Gastric reduction to a tubular shape; intestine remains untouched. | Small proximal stomach pouch connected directly to the jejunum. |
| Mechanism of Action | Primary restriction and significant reduction of circulating ghrelin. | Restriction combined with altered intestinal transit and incretin signaling. |
| GERD & Acid Reflux Impact | May exacerbate or induce acid reflux in susceptible patients. | Frequently chosen when severe pre-existing acid reflux is present. |
| Nutritional Absorption | Maintains standard physiological gastrointestinal transit. | Bypasses duodenum; requires structured long-term nutritional follow-up. |
| Dumping Syndrome Risk | Uncommon. | May occur after rapid intake of refined sugary foods. |
Acid Reflux (GERD) and Metabolic Considerations
Multidisciplinary Candidacy and Decision-Making
Bariatric surgery with Meva Clinic
Know your surgeon, your hospital and your safety net before you travel
Weight-loss surgery abroad is a serious decision. Before you book a flight, we confirm in writing who operates, where, what is included and what happens if something goes wrong.
Experienced bariatric surgeon
Op. Dr. Cuma A. has focused on obesity and metabolic surgery for 10+ years, with 10,000+ bariatric procedures and the Turkish Ministry of Health obesity surgery certification.
Accredited partner hospital
Surgery takes place in an accredited partner hospital, with about 4 nights in hospital and 24/7 nursing care throughout your stay.
6-month complication insurance
Gastric sleeve and gastric bypass packages include 6-month complication insurance.
Price confirmed in writing
Your price and what it covers are sent in writing before you travel. No hidden extras added at the hospital.
No deposit
No advance payment is required. You pay at the hospital in Istanbul, after the in-person consultation and pre-operative tests confirm the plan.
24/7 support in your language
One coordinator on WhatsApp from your first message to follow-up after you return home, 24/7.
Package prices
From prices. The final plan is confirmed by the surgeon after your medical assessment.
Included
Surgery and about 4 nights in hospital with 24/7 nursing · Private airport–hospital transfers · Nutrition and follow-up guidance · Optional Bosphorus-view partner hotel on request (separate cost). Flights are not included.
Frequently Asked Questions
How does the surgeon decide between sleeve and bypass during consultation?↓
The clinical team evaluates upper endoscopy results (checking for esophagitis or hiatal hernia), metabolic conditions such as diabetes, BMI, and eating patterns to determine the most suitable surgical approach.
Can a gastric sleeve be revised to a gastric bypass in the future?↓
Yes. If severe acid reflux develops or weight-loss goals are not maintained over time, revisional conversion from a sleeve to a Roux-en-Y gastric bypass is an established clinical pathway.
Would you like a confidential medical review?
Share your treatment question with our international patient team. Suitability and treatment decisions are confirmed by the responsible licensed physician after clinical assessment.
Please do not send sensitive medical documents in your first message. Our team will explain the secure next step.
Medically reviewed by
Op. Dr. Cuma A.
General Surgeon · Obesity & Metabolic Surgery
Graduate of Istanbul University–Cerrahpaşa Faculty of Medicine and specialist in general surgery. For more than 10 years his practice has focused on obesity and metabolic surgery — sleeve gastrectomy, gastric bypass, gastric botox and gastric balloon — with more than 10,000 bariatric procedures performed. Holds the Turkish Ministry of Health–approved obesity surgery certification.
Partner Hospital Quality & Medical Network Standards
Accreditation and society references relate to selected partner hospitals, provider institutions, or individual partner surgeons where applicable. Meva Clinic coordinates international patient care through licensed healthcare providers and specialist medical partners.