- Keyhole surgery through 4-5 small incisions.
- 45-120 minutes, depending on the operation.
- Serious complications nationally: 1.4% (2024).
- Recovery at home: on average 3-6 weeks.
- The lifestyle change is the real work.
What does the operation involve?
You arrive at hospital fasting. Anaesthesia is general via an IV; spinal anaesthesia is not possible because the abdominal cavity is filled with gas and the surgeon works through four or five small incisions, Vitalys explains. The operation takes 45 to 120 minutes depending on the type.
Afterwards you are monitored on the ward and encouraged to move soon. At Ziekenhuis Rivierenland patients go home the day after surgery after lunch if it is medically possible.
How big are the risks?
In the national DATO register, 1.4 percent of Dutch patients had a serious complication in 2024. The most serious early complication is a leak at a staple line, which is rare. Pain and nausea are common in the first days. Longer-term risks depend on the operation, such as reflux after a sleeve and internal hernia or dumping after a bypass.
What makes the pathway demanding?
Before surgery you stop smoking, follow a screening and keep your weight stable. After surgery you eat six small meals a day, never drink with meals, take vitamins for life and attend check-ups for at least five years. WeightWorks mentions an average recovery of three to six weeks, but the eating pattern takes the whole first year to settle.
People who understand this in advance usually experience the operation as the smallest part of the whole.
What is light and what is heavy
Advantages
| Advantage | Explanation |
|---|---|
| Keyhole technique | small incisions, fast mobilisation |
| Short stay | often one to a few days |
| National register | quality monitored |
| Clear protocols | screening and aftercare |
Points of attention
| Point of attention | Explanation |
|---|---|
| Lifelong changes | food, vitamins, check-ups |
| First months | little appetite, fatigue |
| Complications | rare but possible |
| Mental adjustment | doubt and regret can occur |
Cost and insurance (2026)
With a valid indication the whole pathway is covered by the basic package.
| Item | Amount or arrangement |
|---|---|
| Covered pathway | €385 deductible 2026 |
| Self-pay range | about €7,000-€11,000 |
| Vitamins | €10-€15 a month |
Is weight loss surgery major surgery?: key figures
| Feature | Value |
|---|---|
| Incisions | 4-5 |
| Operation time | 45-120 minutes |
| Serious complications (2024) | 1.4% |
| Hospital stay | 1 to a few days |
| Recovery at home | 3-6 weeks |
The operation compared with the pathway
| Aspect | The operation | The pathway |
|---|---|---|
| Duration | 45-120 minutes | years |
| Effort | low for you | high: daily habits |
| Risk | 1.4% serious | deficiencies if you stop vitamins |
| Support | surgical team | dietitian, psychologist, nurse |
Step by step
- Preparation. Screening, stop smoking, stable weight.
- Operation. Keyhole surgery under anaesthesia.
- Hospital. One to a few days.
- Recovery. Three to six weeks at home.
- Lifelong. Eating pattern, vitamins, check-ups.
Read next
- The operation step by step — details
- Risks and disadvantages — honest overview
- Hospital stay — how long
- The treatment pathway — start to finish
Is it harder as an expat?
The operation itself is the same, but the pathway can feel heavier when group sessions and materials are in Dutch and your support network lives abroad. Ask the centre early what is available in English, and arrange help at home for the first weeks, when you may not lift more than 2.5 kilograms.
How to prepare so the operation feels lighter
Stop smoking well in advance, keep your weight stable during the preparation phase and follow the information sessions. Order your WLS vitamins before the operation so you can start right away, and prepare liquid and puréed food at home for the first weeks.
Arrange practical help: someone to drive you home, help with lifting and household tasks, and time off work for about two weeks with an office job, longer with physically heavy work. People who prepare well usually find the recovery much calmer.
When does the demanding part start?
For most people it starts after discharge: the first weeks of liquid and puréed food, little appetite, fatigue and learning new eating habits. Aftercare with a dietitian, psychologist and nurse is there to guide you through exactly this phase, so use it.
Compared with other operations
Weight loss surgery is usually done as keyhole surgery, which means smaller wounds and a faster start of recovery than open abdominal surgery. The lasting change lies in how you eat for the rest of your life.
That is why centres invest so much time in preparation: the better you understand the pathway, the easier the operation and the months after it usually feel.
Talking to your employer
Plan about two weeks off with an office job and four to six weeks with physically heavy work, and discuss a gradual return. You do not have to tell your employer which operation you had.
Frequently asked questions about how serious weight loss surgery is
Medically it is keyhole surgery with a favourable risk profile. The demanding part is the lifelong change in eating habits, vitamins and check-ups.
Nationally 1.4 percent of Dutch patients had a serious complication in 2024. The most serious early complication, a leak, is rare.
45 to 120 minutes, depending on the type of operation.
On average three to six weeks at home, according to WeightWorks. Adjusting to the new eating pattern takes the whole first year.
Because the abdominal cavity is filled with gas and the operation is done laparoscopically, general anaesthesia is needed, Vitalys explains.
Usually one to a few days; some hospitals discharge you the day after surgery.
A bypass takes longer (90-120 minutes versus 45-75) and has other risks, but recovery time is similar.
Often the first months: little appetite, eating without hunger and adjusting socially.
Yes: stop smoking, keep your weight stable, order vitamins in advance and arrange help at home.
Centres weigh risks more heavily with age; ETZ uses 18 to 70 as a starting point.
Call +31 6 38048347 (Mon–Fri 09:00–17:00) or email info@maagverkleining-info.nl. This page is also available in Dutch.
Sources
- DATO Annual Report 2024, DICA
- Vitalys (Rijnstate): FAQ
- Ziekenhuis Rivierenland: patient information
- WeightWorks: recovery
Search terms leading here: is weight loss surgery major surgery, how serious is gastric bypass, bariatric surgery risks.
Author: Gijs Bodenstaff. Last reviewed: September 2026.