Gastric bypass surgery in Egypt: the Roux-en-Y operation explained

The surgeon staples off a small upper stomach pouch and connects it to a lower segment of the small intestine, so food skips most of the stomach and the first part of the small intestine (Cleveland Clinic). The bypassed limb is joined back further down, giving the Y shape.

It works through smaller portions, less absorption and changes in gut hormones and bacteria that may affect appetite and metabolism (NIDDK). It is difficult to reverse, although a surgeon may do so if medically necessary.

ASMBS and IFSO recommend surgery for adults with a body mass index (BMI) above 35, and say it should be considered from 30 to 34.9 with metabolic disease; for people of Asian background the threshold is 27.5 (ASMBS/IFSO). Check your figure with our BMI calculator.

The bypass is a strong option when obesity comes with type 2 diabetes. In the STAMPEDE trial, 29% of bypass patients had a glycated haemoglobin of 6.0% or less five years later, against 5% on medical therapy alone (NEJM).

It is also the usual answer to severe reflux: in a meta-analysis of sleeve patients, 4% needed conversion to a bypass for reflux (Annals of Surgery). Surgery may not be possible during pregnancy, with severe heart or lung disease, active cancer, uncontrolled illness or a substance use disorder (Cleveland Clinic).

The bypass is done by keyhole surgery under general anaesthetic and usually takes around 2 hours (NHS); Cleveland Clinic quotes two to three hours (Cleveland Clinic). The main steps are:

1. A camera and instruments are passed through small cuts in the abdomen.
2. The top of the stomach is stapled off to make the pouch.
3. The small intestine is divided and its lower end is joined to the pouch.
4. The upper end, carrying bile, is joined further down to form the Y.
5. The gaps in the bowel's supporting tissue (mesentery) are closed, then the cuts.

The last internal step matters. A meta-analysis of 53,488 patients found that closing the mesenteric gaps reduced internal hernias and reoperations (Obesity Surgery).

Before surgery you are assessed with blood and urine tests, X-rays and scans, along with your mental wellbeing and eating patterns (NHS).

Stop smoking at least 6 weeks before surgery (NIDDK). Smoking was linked to a 4.6-fold higher risk of ulcers at the join after a bypass, and ASMBS advises stopping before any operation of this kind (ASMBS).

Bring a full list of your medicines. Anti-inflammatory painkillers and steroids raise ulcer risk after a bypass (ASMBS). Mention diabetes tablets or insulin too.

Most people leave hospital 1 to 3 days after weight-loss surgery and return to normal activities after 4 to 6 weeks (NHS); avoid strenuous activity for two to four weeks (Cleveland Clinic). A typical diet progression is:

• Weeks 1–2: water and fluids, such as thin soup.
• Weeks 3–4: runny or puréed food, such as yoghurt.
• Weeks 5–8: soft food, such as mashed potato.
• From week 8: a gradual return to a balanced diet.

You will need vitamin and mineral supplements for life, usually a multivitamin, B12, calcium, vitamin D and iron, and yearly specialist visits for life (ASMBS). This matters more after a bypass, which carries a higher chance of vitamin and iron shortage than the band or sleeve (NIDDK).

Acid-suppressing tablets for at least 3 months significantly reduce the risk of marginal ulcers (ASMBS); take them as long as advised.

Early risks

Early risks include blood clots, a leak from the staple lines or joins, wound infection, and narrowing or blockage of the gut (NHS).

Dumping syndrome

Dumping is caused by food reaching the small intestine too fast, giving diarrhoea, nausea, light-headedness or tiredness after a meal (NIDDK). Early dumping comes within 30 minutes of eating and late dumping 1 to 3 hours after. The first treatment is changing how and what you eat: smaller, more frequent meals with more protein and fibre.

Gallstones and excess skin

Gallstones can form during rapid weight loss, and large weight loss can leave folds of excess skin (NHS).

A marginal ulcer is an ulcer at the join between pouch and intestine. In a registry of 14,168 bypass patients the ulcer rate at one year was 0.9%, and the risk rose with a larger pouch; smoking, anti-inflammatory painkillers and steroids add to it (ASMBS). A perforated ulcer is a surgical emergency, and almost every patient in a systematic review presented with abdominal pain (SOARD).

An internal hernia happens when bowel slips through a gap created by the rerouting. Closing those gaps during surgery lowers the risk (Obesity Surgery), but sudden or cramping abdominal pain months or years later still needs prompt assessment.

Long term, Cleveland Clinic lists malnutrition and poor absorption of nutrients (Cleveland Clinic), and NIDDK notes the bypass may increase the risk of alcohol use disorder (NIDDK).

Go to the nearest emergency department straight away if you have (NHS):

• severe abdominal pain;
• vomiting blood, or vomit that looks like coffee grounds;
• heavy bleeding from the back passage.

Contact the team the same day for pain or swelling in a leg, a high temperature or shivering, difficulty swallowing, or repeated vomiting. After a bypass, severe abdominal pain may be a perforated ulcer or an internal hernia, so never wait for it to settle on its own.

Cleveland Clinic reports that people lose about 30% of their starting weight after a bypass (Cleveland Clinic). In STAMPEDE, body weight was 23% lower five years after a bypass, and use of insulin fell by 35% (NEJM).

These are averages, not a promise. Results depend on your starting weight, eating and activity, and on keeping up with follow-up for life.

The table compares the classic bypass with the mini gastric bypass and the sleeve, the main alternatives.

If you already had a sleeve or band and now have reflux or weight regain, see revisional bariatric surgery. The choice is always made after examination and endoscopy.

The price depends on the hospital and room class, the surgeon and anaesthetist, the number of stapler cartridges, the length of stay, tests before surgery, and the follow-up and supplements included.

The price depends on your case and is given on request, so ask for a current written quote listing each item. You can book a consultation with Dr. Yasser in New Cairo or at Cleopatra Hospitals, and ask the clinic about payment options.