Gastric Sleeve in Turkey — Laparoscopic Sleeve Gastrectomy at Eyeglow Istanbul
Laparoscopic sleeve gastrectomy — 70–80% of the stomach is permanently removed, creating a banana-shaped tube that restricts food intake and lowers ghrelin (appetite hormone). 60–70% excess weight loss at 5 years per IFSO global registry. Performed at our partner accredited hospital by a board-certified bariatric surgeon, with full pre-op workup, intra-op leak test, post-op contrast study, and 12-month structured nutritional follow-up.
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What is gastric sleeve (laparoscopic sleeve gastrectomy)?
Gastric sleeve — formally laparoscopic sleeve gastrectomy (LSG) — is a bariatric procedure in which 70–80% of the stomach (the greater curvature and fundus) is permanently removed, leaving a narrow banana-shaped tubular stomach. The procedure works through restriction (smaller stomach) plus reduction of ghrelin, the appetite hormone produced by the removed fundus. Average outcome: 60–70% excess weight loss at 5 years, ~50–60% type 2 diabetes remission per IFSO global registry.
At Eyeglow Health in Istanbul, gastric sleeve is performed at our partner accredited hospital by a board-certified bariatric surgeon holding IFSO-recognised credentials with documented sleeve volume. The Turkish Ministry of Health International Health Tourism Authority Certificate is held by both Eyeglow and the partner hospital. We follow IFSO (International Federation for the Surgery of Obesity) and ASMBS (American Society for Metabolic and Bariatric Surgery) guidelines for candidate selection, pre-operative workup, intra-operative protocol and structured follow-up.
Sleeve is the right procedure for patients meeting BMI criteria without severe pre-existing GERD, who want a simpler procedure with no intestinal rerouting and a lower long-term nutritional risk than bypass. It is not the right choice for severe reflux, very high BMI where bypass gives more durable loss, or patients unwilling to commit to lifelong supplementation. That decision belongs to a bariatric surgeon who has personally reviewed your full medical history — not to a marketing brochure or a price-list page.
From eligibility review to 12-month follow-up
- 01
Online eligibility review + BMI + comorbidity screen
You share your height, weight, BMI, medical history (diabetes type 2, hypertension, sleep apnoea, joint disease) and a brief medication list. The bariatric surgeon checks IFSO/ASMBS criteria — BMI ≥40, or BMI ≥35 with at least one obesity-related comorbidity. If you do not meet criteria we tell you honestly before any package is quoted.
- 02
Pre-operative tests in Istanbul (day 1)
Full blood panel (CBC, INR, HbA1c, lipid profile, liver and kidney function, thyroid, vitamin D, B12, ferritin), upper-GI endoscopy (to exclude hiatus hernia, Helicobacter pylori, ulcer or undiagnosed pathology), abdominal ultrasound, ECG, chest X-ray, anaesthesia review and pulmonary clearance. Pre-op liver-shrinking diet of 10–14 days is started before you fly.
- 03
Surgeon consultation + informed consent
The bariatric surgeon walks you through the procedure, expected weight-loss curve (typically 60–70% excess weight loss at 5 years per IFSO registry data), nutritional supplementation for life (multivitamin, B12, calcium + vitamin D, iron), the irreversible nature of the procedure, and realistic risks — leak (0.5–1%), bleeding, stricture, GERD worsening, and the need for lifelong dietary changes.
- 04
Laparoscopic sleeve gastrectomy (60–90 minutes)
Under general anaesthesia, 4–5 small abdominal incisions (5–12 mm) are used to insert the laparoscope and stapling instruments. The greater curvature of the stomach (70–80% of total volume) is divided along a calibrated bougie (typically 36–40 Fr), creating a narrow tubular stomach the shape and volume of a banana. The staple line is reinforced and a leak test (methylene blue or air) is performed before closure. No intestinal rerouting — anatomy is restrictive only.
- 05
Hospital recovery + leak test + discharge (3 nights)
Day 1 post-op: clear liquid intake under nursing supervision, early mobilisation to reduce DVT risk, IV proton-pump inhibitor and analgesia. Day 2: upper-GI contrast study confirms no leak; clear liquid diet continues. Day 3: discharge to your 5-star hotel on a purée diet protocol with detailed daily volume guidance. Drainage tubes (if used) typically removed before discharge.
- 06
12-month structured nutritional follow-up
Diet stages: clear liquids (week 1) → full liquids (week 2) → purée (weeks 3–4) → soft food (weeks 5–6) → solid food from week 7. Scheduled video reviews at 1, 3, 6 and 12 months covering weight loss curve, nutritional bloods, supplement compliance, comorbidity improvement (HbA1c, blood pressure, sleep apnoea), and psychological adjustment. Lifelong nutritional supplementation is essential and we explain why honestly.
Gastric sleeve vs gastric bypass vs balloon vs lifestyle
Bariatric surgery is not the right answer for every patient with obesity. Here is how the four main pathways compare on mechanism, outcome and risk profile:
| Aspect | Sleeve | Gastric bypass | Gastric balloon | Lifestyle + medication |
|---|---|---|---|---|
| Mechanism | Restriction + ghrelin reduction (appetite hormone) | Restriction + malabsorption (intestinal rerouting) | Restriction (temporary, 6–12 months) | Behavioural — diet + exercise + medication |
| Reversibility | Irreversible (stomach removed) | Reversible in principle; rarely reversed | Removed at 6–12 months | Fully reversible |
| Excess weight loss (5y) | 60–70% | 70–80% | 15–25% (during balloon period) | 5–10% (most patients regain) |
| Diabetes T2 remission | ~50–60% | ~60–70% | Limited | <10% |
| Procedure duration | 60–90 minutes | 90–150 minutes | 20–30 minutes (endoscopic) | Not applicable |
| Hospital stay | 3 nights | 3–5 nights | 0–1 night | None |
| Nutritional risk | Moderate (B12, iron, calcium) | High (malabsorption — lifelong supplements) | Low | None |
Personalised pricing
Every treatment plan is priced individually after your consultation. Request a written, all-inclusive quote — clear, itemised, and with no obligation.
Request a written quoteWhat's included in your gastric sleeve package
Included in package
- Pre-op bariatric surgeon consultation + IFSO/ASMBS eligibility review
- Full blood panel + upper-GI endoscopy + abdominal ultrasound + ECG + chest X-ray
- Anaesthesia review + pulmonary clearance
- Laparoscopic sleeve gastrectomy at partner accredited hospital
- General anaesthesia + reinforced staple line + intra-op leak test
- Hospital stay — 3 nights private room
- 5-star hotel — 2 nights post-discharge
- VIP airport transfers + hospital-hotel transfers
- Post-op contrast study (upper-GI X-ray) before discharge
- All post-op medications + proton-pump inhibitor + DVT prophylaxis + dietitian-led nutritional kit
- 1, 3, 6 and 12-month video nutritional follow-up + bloods interpretation
- Multilingual bariatric coordinator — 24/7 throughout your stay
- Complication insurance — covers eligible post-operative medical complications during the recovery period at our partner accredited clinic (issued in line with the Turkish Ministry of Health International Health Tourism Authority Certificate)
Paid separately
Items below are not part of the medical package — your coordinator helps you arrange them at no markup.
- Flights to/from Istanbul
- Personal expenses + food after discharge
- Lifelong nutritional supplements (multivitamin, B12, calcium + vitamin D, iron — prescribed at discharge)
- Local-country dietitian follow-up after the 12-month package ends
- Plastic surgery for post-weight-loss skin laxity (abdominoplasty, brachioplasty, mastopexy — quoted separately)
- Unrelated medical treatments
- Travel insurance (flight cancellation, baggage, general trip cover) — separate from the medical complication policy above; your coordinator can recommend a provider at no markup
Are you a candidate for gastric sleeve?
You may be a good candidate if
- Your BMI is 40 or above, or 35 or above with an obesity-related comorbidity (type 2 diabetes, hypertension, obstructive sleep apnoea, severe joint disease) per IFSO/ASMBS guidelines.
- You have attempted medical and behavioural weight management (structured diet, exercise, GLP-1 medication where appropriate) and have not achieved durable results.
- You understand the procedure is irreversible — 70–80% of the stomach is permanently removed — and accept lifelong nutritional supplementation.
- You are willing to commit to staged diet progression and 12-month structured follow-up, including video reviews and nutritional bloodwork.
- You have no active untreated psychiatric condition, active substance use disorder or untreated eating disorder that would compromise outcome (bariatric psychology review available where indicated).
Sleeve is not the right choice if
- Your BMI is below 35 without an obesity-related comorbidity — sleeve is not indicated; consider medical management (GLP-1 RA, behavioural therapy) or an intragastric balloon.
- You have severe GERD (reflux) or large hiatus hernia — sleeve often worsens reflux; gastric bypass is the better bariatric option for you.
- You have an active untreated eating disorder (bulimia, binge eating) — bariatric psychology stabilisation is required first.
- You are unwilling to commit to lifelong vitamin and mineral supplementation or scheduled follow-up.
- You are pregnant, breastfeeding, or planning pregnancy within 12 months — defer surgery until at least 12–18 months pre-conception.
Disclaimer. Information on this page is consistent with IFSO (International Federation for the Surgery of Obesity), ASMBS (American Society for Metabolic and Bariatric Surgery) and NICE bariatric guidelines, and Turkish Ministry of Health International Health Tourism Authority Certificate requirements. The choice between sleeve, bypass, balloon and medical management is a case-by-case clinical decision based on BMI, comorbidities, reflux history and surgeon assessment — not a marketing-driven default.
Realistic outcomes — the risks that actually matter
Every bariatric procedure has measurable risks. We list them here in the same plain language our bariatric surgeon uses in your consultation:
Staple-line leak (0.5–1%)
A leak from the gastric staple line is the most serious sleeve-specific complication, occurring in roughly 0.5–1% of cases per IFSO global registry data. Most leaks are detected by intra-op leak test or post-op contrast study before discharge. Late leaks (days 5–14) may present with fever, tachycardia, abdominal pain or shoulder pain — patients are briefed to recognise these signs and contact the coordinator immediately. Management ranges from drainage and endoscopic stenting to re-operation. Our partner hospital uses reinforced staple lines and intra-op testing as standard practice.
Worsening of reflux (GERD)
Sleeve gastrectomy creates a high-pressure narrow stomach tube which can worsen pre-existing reflux or induce new-onset GERD in 10–20% of patients at 5 years. Patients with significant pre-op reflux are usually directed towards gastric bypass instead, which improves rather than worsens GERD. Post-sleeve GERD is typically managed with long-term proton-pump inhibitor; persistent severe cases may require conversion to bypass — we are honest about this in consultation, not after the fact.
Nutritional deficiency (lifelong supplementation)
Sleeve carries a moderate nutritional deficiency risk — particularly vitamin B12, iron, calcium and vitamin D. Lifelong daily supplementation is not optional. Annual bloodwork is required to monitor and adjust. Patients who skip supplements may develop anaemia, osteoporosis, or peripheral neuropathy (B12 deficiency). Our 12-month structured follow-up includes nutritional bloods and we are explicit that this is a permanent change in how your body absorbs nutrients.
Inadequate weight loss or weight regain
Approximately 15–20% of sleeve patients experience inadequate weight loss (<50% EWL) or significant weight regain at 5 years. Causes include sleeve dilation, behavioural drift, and stomal incompetence. Options include behavioural revision, GLP-1 RA medication, or revision surgery (re-sleeve, conversion to bypass, or duodenal switch). We tell candidates honestly that surgery is a tool — sustained behavioural change is the outcome determinant.