guarantee
Gastric Sleeve and Bypass in Lisbon
for good —
14,000 CMC patients already live in a new body. The result is fixed in an official contract, legally and not only verbally.
patients
experience
from excess weight
rating
Gastric Sleeve and Bypass in Lisbon
for good —
Everything for the result — included
Bariatric surgery —
is it right for me?
Tick the situations that sound familiar.
From 2 matches — a reason to talk to a surgeon.
Everything needed for the result —
already included
Zero hidden fees, zero surprises. One package covers the entire path.
Bariatric surgery —
is it right for me?
Tick the situations that sound familiar.
From 2 matches — a reason to talk to a surgeon.
Reasons to see a surgeon
Seeing a surgeon is justified by related conditions as well, not by a high BMI alone
Medical history
Excess weight since childhood or a genetic predisposition
Metabolic disorders
Type 2 diabetes and hypertension associated with obesity
Resistance to conservative treatment
No durable effect from dieting and medication over several years.
Medical history
Excess weight since childhood or a genetic predisposition
Metabolic disorders
Type 2 diabetes and hypertension associated with obesity
Resistance to conservative treatment
No durable effect from dieting and medication over several years.
When is bariatric surgery justified?
Surgery is prescribed only when clear criteria are met
The role of body mass index (BMI)
To gauge obesity, doctors rely primarily on BMI, which equals body weight (kg) divided by the square of height (m²). An operation is usually warranted with a BMI over 40, or over 35 with serious associated conditions. Occasionally surgery is weighed at lower values as well, once non-surgical options have failed.
Key factors
- The patient's body mass index (BMI)
- Overall health and any related chronic conditions
- Failure of previous attempts to lose weight by conventional means
Why don't diets and exercise work for everyone?
Many people try various diets and exercise for years, but the body fights back: metabolism slows, appetite grows and the lost weight returns. When it becomes clear that diet changes and medication alone cannot fundamentally improve the situation, bariatric surgery becomes the only effective way out.
Key factors
- The patient's body mass index (BMI)
- Overall health and any related chronic conditions
- Failure of previous attempts to lose weight by conventional means
The role of body mass index (BMI)
To gauge obesity, doctors rely primarily on BMI, which equals body weight (kg) divided by the square of height (m²). An operation is usually warranted with a BMI over 40, or over 35 with serious associated conditions. Occasionally surgery is weighed at lower values as well, once non-surgical options have failed.
Why don't diets and exercise work for everyone?
Many people try various diets and exercise for years, but the body fights back: metabolism slows, appetite grows and the lost weight returns. When it becomes clear that diet changes and medication alone cannot fundamentally improve the situation, bariatric surgery becomes the only effective way out.
Medical indications
for bariatric surgery
Please speak with a clinic physician if you have chronic conditions!
Indications
Excess weight
Type 2 diabetes
Hypertension
Sleep apnea
Joint disease
Varicose veins
Fatty liver disease
Reproductive health problems
Contraindications
Age under 18
Malignant tumors
Less than six months since breastfeeding ended
Acute illness or flare-ups of chronic disease
Severe chronic and mental illness
Blood clotting disorders
Pregnancy
Bariatric surgery methods at City Medical Centre
Sleeve gastrectomy
In surgery, most of the stomach is taken out and the rest is formed into a narrow tube. Portions become far smaller and ghrelin, the hormone behind hunger, drops, so the patient feels full quicker and eats less.
Effectiveness: fits patients with a BMI of 35 to 45. They lose 60–70% of excess weight on average.
Specifics: compared with bypass operations, the result is less stable. When the diet is not followed — notably with high-calorie drinks and liquid food — weight may return.
Roux-en-Y gastric bypass
A small pouch of 50–70 ml is created from the upper stomach and connected directly to the small intestine. Food intake is limited, and fewer calories are absorbed because food travels a shorter path through the gut.
Effectiveness: the operation counts as the “gold standard” for BMI above 45–50 with type 2 diabetes; 75–85% of excess weight is lost.
Specifics: results hold better than with other bariatric methods. Related conditions like diabetes and hypertension frequently go into remission. Since digestive anatomy is altered, vitamin and mineral supplements are needed for life.
Mini gastric bypass (MGB)
This is an enhanced form of the classic bypass. The standard method differs: here the surgeon makes only one connection (anastomosis) between the small stomach and the small intestine. Thanks to the simpler technique, the patient has an easier time and recovers faster.
Effectiveness: comparable to the classic Roux-en-Y bypass — patients lose up to 75–80% of excess weight.
Specifics: shorter surgery and faster recovery. The procedure is technically reversible, but there is a risk of bile reflux due to the single anastomosis.
Single anastomosis duodeno-ileal bypass (SADI-S)
The modern combined technique SADI-S unites the benefits of sleeve gastrectomy and intestinal bypass. It proceeds in two stages: the surgeon first turns the stomach into a narrow tube, then reroutes the small intestine so that most of it is kept out of active digestion.
Effectiveness: one of the most powerful bariatric operations — excess weight loss reaches 80–90% with a long-lasting result.
Specifics: removing the ghrelin-producing zone makes the stomach smaller and lowers appetite, while rerouting food around part of the intestine restricts calorie absorption. Indicated for super obesity (BMI over 50), severe type 2 diabetes, or as a second stage after an ineffective sleeve.
Book a consultation
Call or message us -
our coordinator will contact you shortly
and book your consultation
Book a consultation
Call or message us -
our coordinator will contact you shortly
and book your consultation
Preparing for bariatric surgery at City Medical Centre
You begin with a surgeon's consultation, where history, method and recovery plan are covered
Lab tests
A complete blood count, urinalysis, biochemistry, HbA1c and clotting test (coagulation panel).
Instrumental diagnostics
Chest X-ray and ECG, abdominal and renal ultrasound, Doppler of leg veins.
Endoscopy
Gastroscopy (required) and colonoscopy (if indicated).
Specialists
GP and endocrinologist, psychiatrist, cardiologist, and gynecologist for women.
Diet
2–4 weeks before surgery, cut fast carbs and fats; the day before, switch to light meals.
Lifestyle
From a month before: no smoking, less physical activity, no stress.
The day before
A light dinner is the last meal; no fluids in the 3–4 hours before surgery.
Lab tests
A complete blood count, urinalysis, biochemistry, HbA1c and clotting test (coagulation panel).
Instrumental diagnostics
Chest X-ray and ECG, abdominal and renal ultrasound, Doppler of leg veins.
Endoscopy
Gastroscopy (required) and colonoscopy (if indicated).
Specialists
GP and endocrinologist, psychiatrist, cardiologist, and gynecologist for women.
Diet
2–4 weeks before surgery, cut fast carbs and fats; the day before, switch to light meals.
Lifestyle
From a month before: no smoking, less physical activity, no stress.
The day before
A light dinner is the last meal; no fluids in the 3–4 hours before surgery.
Our specialists
Veteran bariatric surgeons who truly care about their patients' health
Ruslan S. Menzulin
Bariatric surgeon · surgical oncologist
Trained at Mercy clinic, mentored by Vadim Gushchin, and spoke at the World Congress of bariatric surgery in 2025. A co-author of an international study in The Lancet.
Andrey G. Ugay
Lead bariatric surgeon · surgeon
Leads the country in SASJ operations performed. Expert council member at the national Society of Bariatric Surgeons, speaking regularly at national and international congresses.
City Medical Centre bariatric surgery centre
— your path
to confidence and harmony
City Medical Centre takes a full-picture approach to obesity. Once the first examination is done, each patient gets a tailored diagnostic program (lab and instrumental) that reveals every disorder in the body.
A method matched to your goal
Our doctors pick the surgical method for every patient individually. They examine your health, weight history and related conditions before deciding, so they can propose the most suitable surgical treatment.
Support that stays in touch
The City Medical Centre team keeps supporting you after the operation. All through the first year, specialists track how your weight drops, check your tests and handle every question on diet and recovery.
Fast recovery
Bariatric operations at City Medical Centre use laparoscopy, which greatly cuts recovery time. Most patients move around on day one and get back to normal life within a week.
Full diagnostics on site
Forget going between clinics. Everything for your work-up is here, including our own lab, ultrasound and gastroscopy. Preparation is quick and queue-free, all in a single building.
Recovery after bariatric surgery
Recovery is mostly down to the individual; still, minimally invasive laparoscopic methods keep rehabilitation as short as possible.
Duration
A clinic stay of 1 to 5 days under observation follows, depending on surgical extent and related conditions.
Activity
You are permitted to sit up, stand and drink fluids in the first hours after surgery.
Wound care
Absorbable sutures are used; they dissolve on their own.
Work
7–14 days after surgery you can return to work, depending on how physical the job is.
Restrictions
In the first weeks, avoid the bathhouse, sauna and intense physical exercise.
Diet
A step-by-step diet lasts 1–2 months, from liquids to solids, giving the stomach time to adapt.
Pace
Average monthly loss is 10% of excess weight for patients following the specialists' advice.
Stabilization
The final result is seen after 1.5–2 years. In that time the patient builds stable eating habits that keep the weight from returning.
Important! Your recovery is supervised by City Medical Centre specialists, who give psychological and medical support through each stage of weight loss.
Duration
A clinic stay of 1 to 5 days under observation follows, depending on surgical extent and related conditions.
Activity
You are permitted to sit up, stand and drink fluids in the first hours after surgery.
Wound care
Absorbable sutures are used; they dissolve on their own.
Work
7–14 days after surgery you can return to work, depending on how physical the job is.
Restrictions
In the first weeks, avoid the bathhouse, sauna and intense physical exercise.
Diet
A step-by-step diet lasts 1–2 months, from liquids to solids, giving the stomach time to adapt.
Pace
Average monthly loss is 10% of excess weight for patients following the specialists' advice.
Stabilization
The final result is seen after 1.5–2 years. In that time the patient builds stable eating habits that keep the weight from returning.
Important! Your recovery is supervised by City Medical Centre specialists, who give psychological and medical support through each stage of weight loss.
Book a consultation
Call or message us -
our coordinator will contact you shortly
and book your consultation
Book a consultation
Call or message us -
our coordinator will contact you shortly
and book your consultation
Frequently asked questions
about bariatric surgery at CMC
Bariatric vs plastic surgery: what's the difference?
Though often confused, the two have fundamentally different goals. Bariatric surgery is a medical treatment of obesity and related illnesses; it changes the functioning of the digestive tract to address the causes of excess weight and metabolism. Plastic surgery reshapes the outer contours of the body and neither treats obesity nor affects metabolism.
How soon can I return to work and normal life?
Will there be visible scars?
We rely on modern laparoscopic technique. The operation is performed through 4 small punctures of 5 to 15 mm. Cosmetic sutures are used, so after healing the marks are barely visible.
What diet do I need to follow?
Your diet changes in stages: from liquid food to soft, then to solid. The focus is on protein and on limiting high-calorie, fatty food.
What types of bariatric surgery are there?
City Medical Centre carries out four main types of bariatric surgery: sleeve gastrectomy, Roux-en-Y gastric bypass, mini gastric bypass (MGB) and SADI-S duodeno-ileal bypass. The choice of method is individual, based on BMI, related conditions and the patient's goals.
Can I plan a pregnancy after surgery?
Pregnancy after bariatric surgery is possible, though doctors recommend waiting at least 12–18 months. In that time the body stabilizes, weight reaches its target and nutritional status returns to normal.
Do I need to take vitamins after surgery?
Yes, vitamins after bariatric surgery are a must. Because the digestive anatomy changes, the body absorbs some nutrients less well, so regular vitamin and mineral supplements become a permanent part of the patient's life.
Can the weight come back?
After bariatric surgery weight regain can happen, but it is very unlikely if the doctor's advice is followed. What matters is proper nutrition, avoiding high-calorie drinks and regular follow-up with City Medical Centre specialists.
Prices
A free consultation for any service if you apply before the end of the month
Service
Discounted price
City Medical Centre licences
Other services at our clinic
How obesity surgery works for Lisbon residents
Why do diets fail? The body fights back: metabolism slows, appetite grows, and lost kilos return. When diet changes and medication cannot fundamentally improve the situation, surgery becomes the effective way out. Lisbon residents who have tried diets, fasting and pills for years without a lasting result are exactly the patients for whom bariatric operations are intended.
Several things are worth planning ahead. Pregnancy is advised no earlier than 12–18 months after surgery, once weight and nutritional status stabilise. Vitamins become a permanent part of life because the body absorbs some nutrients less well. Swimming waits 30 days, strength work longer. Patients from Lisbon discuss these points with the surgeon well before the operation date.
Weight loss is written into the contract, and the package includes every stage: consultation, diagnostics, the operation, inpatient care with meals and a year of support. A personal coordinator guides you from day one. To begin, patients from Lisbon leave a request on the page or message the clinic, then receive a free consultation with a bariatric surgeon.
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