Bariatric surgery
Sleeve gastrectomy: procedure, benefits and limitations
Sleeve surgery helps weight loss by reducing stomach size and changing appetite signals; selection depends on medical circumstances and treatment goals.
Educational adaptation of an article from the previous website • Content updated: 27 September 2026
What changes during sleeve surgery?
Usually around 70–80% of the stomach is removed, leaving a narrow, tube-shaped stomach. The intestine is not bypassed. Alongside reduced capacity, changes in hormonal signals can affect appetite. The removed portion cannot be restored.
Sleeve gastrectomy concept
AI-created conceptual artwork; not a patient result or an exact surgical diagram.
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Educational illustration
Sleeve gastrectomy changes the stomach into a narrow tube; this is a procedure schematic.
An educational schematic, not a patient result or a personalized treatment plan. Original labels may be in another language.
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Kwipédl Cyop
Sleeve gastrectomy diagram (according IFSO and French HAS).svg · CC BY-SA 4.0
Simplified educational image; not to scale.
Who may benefit?
Sleeve surgery is selected after assessing bariatric eligibility and comparing options. Severe reflux, certain associated conditions or the need for a different metabolic effect may favour another procedure. Smaller incisions do not make it suitable for everyone or risk-free.
Results and the pace of weight loss
Weight loss is usually faster in the first months and then slows. A fixed number of kilograms per month cannot be promised to everyone. Obesity-related conditions may improve, but this depends on the individual and follow-up. Some weight may return in the long term.
Reflux and other complications
Sleeve surgery can worsen existing reflux or cause new reflux. Other potential risks include bleeding, leaks, blood clots and infection. Narrowing, difficulty tolerating food and nutritional deficiencies also need assessment. Seek immediate medical assessment for severe or worsening pain, fever, breathlessness, persistent racing heartbeat or inability to drink fluids.
Long-term care
Follow the care team's staged diet. Adequate protein and fluids, prescribed supplements, gradual activity and follow-up tests are important. Diabetes and blood-pressure medicines may need adjustment. Ask your team about costs, returning to work and activity limits based on your circumstances.
This article provides general information. Treatment and nutrition plans must fit your procedure, associated conditions and individual circumstances.
Sources and article history
Adapted and rewritten from an older article. Absolute claims, outdated prices and advice needing correction have not been republished unchanged.