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Who the gastric sleeve is for

Sleeve gastrectomy is usually considered for adults with a BMI of 40 or above, or 35 and above with an obesity-related illness such as type 2 diabetes or sleep apnoea, who have already tried supervised lifestyle measures. It has become the most commonly performed bariatric operation worldwide, partly because it is effective and technically simpler than a bypass.

Many patients seek it abroad because of cost or waiting lists at home. Destinations such as Turkey run high-volume sleeve programmes built around international patients, which can mean experienced teams — but the quality range is wide, so the clinic matters far more than the country. The sleeve is a permanent operation: most of the stomach is removed and cannot be put back, so it deserves a careful decision rather than an impulse booking.

How the operation works

In a sleeve gastrectomy the surgeon removes roughly 70–80% of the stomach, leaving a slim, banana-shaped tube. This does two things: it sharply reduces how much you can eat at one sitting, and it removes the part of the stomach that produces most of your ghrelin, the main hunger hormone, so appetite usually falls.

Unlike the bypass, the sleeve does not reroute the intestine, so it is not primarily a malabsorptive operation and avoids some of the long-term vitamin issues of bypass — though supplements are still recommended. It is almost always done laparoscopically (keyhole) or with a robot, through a few small incisions.

A key difference from the bypass is reflux: the sleeve can worsen acid reflux in some people, so surgeons often steer patients with significant existing reflux toward a bypass instead. A good clinic will raise this with you rather than offering the sleeve to everyone.

What it costs and what is included

Sleeve packages abroad are usually a single bundled price covering the surgeon, anaesthetist, theatre, a two-to-three night hospital stay, pre-operative tests, and often hotel and airport transfers. Confirm in writing whether the leak test, post-discharge follow-up and any extended stay are included.

As a broad guide, sleeve packages in popular medical-tourism hubs typically fall somewhere around €2,500–€4,500, well below typical self-pay prices in many Western countries. Treat any single figure as indicative, and be sceptical of prices far under the market — savings there usually come from surgeon experience, nursing levels or aftercare, not efficiency.

Budget for the full picture too: flights, time off work, supplements, and the small chance of extra costs if a complication needs treatment after you get home.

Choosing a clinic and surgeon

Start with accreditation: JCI, TEMOS or ISO 9001 for the facility, and recognised board certification in general or bariatric surgery for the surgeon, ideally with membership of a bariatric society such as IFSO. High annual sleeve volumes are a good sign.

Ask how many sleeves the surgeon performs a year, their leak and reoperation rates, and who covers emergencies overnight. Insist on a genuine pre-operative assessment including bloods, and a frank discussion of whether the sleeve or a bypass suits your reflux and diabetes profile. Be cautious of any clinic that books surgery from a couple of messages without assessing you.

Aftercare is decisive. Confirm how the clinic supports you with dietitian input and blood monitoring for at least a year and how it coordinates with your own doctor once you have flown home.

Recovery and the staged diet

Most sleeve patients spend two to three nights in hospital and are encouraged to walk the same day to reduce clot risk. Surgeons usually want a clear leak test before you fly, so plan for around a week away in total, returning to desk work in two to three weeks and avoiding heavy lifting for about six weeks.

The diet advances in stages over four to six weeks: clear liquids, then full liquids, then puréed and soft foods, before solid meals. This protects the healing staple line and is not optional. Portions stay small permanently, and learning to eat slowly and stop early is part of long-term success.

Weight loss is quickest in the first six months and continues for 12–18 months. Daily vitamin supplements are usually advised, and periodic blood tests check for deficiencies, especially iron, B12 and vitamin D.

Risks and what if something goes wrong

The sleeve is generally safe in experienced hands, but it is major surgery. The most serious early risk is a leak from the long staple line, which is uncommon but can be dangerous and needs urgent treatment; bleeding and blood clots are other early risks. Later issues include reflux, narrowing of the sleeve, and nutritional deficiencies if supplements are neglected.

The particular risk of travelling is the handover home. If a leak or other problem appears after you return, your local hospital must manage an operation it did not perform. Before you travel, agree how complications are handled, whether revision is covered, and how your operative notes and imaging will reach doctors at home.

Protect yourself by choosing an accredited centre with a clear emergency plan, taking insurance that covers planned surgery abroad and follow-up, and telling your own GP what you are having done so they can support your recovery.

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