Post bariatric and metabolic surgery emergencies include early complications such as anastomotic or staple-line leaks, which can present with pain, fever, tachycardia, and sepsis, as well as late complications like strictures, marginal ulcers, bile reflux, and severe malnutrition. Prompt recognition through imaging or endoscopy is essential, with treatment ranging from conservative nutritional and endoscopic management to urgent surgical intervention depending on severity.
Post Bariatric / Metabolic Surgery Emergencies
Post Gastric Bypass
- Early (within 30 days)
Anastomotic leak
most commonly from the gastro-jejunal anastomosis (upper joint) but can be from any anastomosis or staple line.
Symptoms
Leaks may present as peritonitis and sepsis (uncontained) or with subacute symptoms of pain, fever, tachycardia, nausea/emesis (usually contained).
Diagnosis
- CT scan
- Contrast swallow study
Treatment
- Uncontained leak should prompt immediate surgical exploration
- Contained leaks in stable patients can be managed highly successful with the use of percutaneous drain placement and endoscopic interventions (stents, fibrin glue injection, clips, sutures) if feasible
- Late (after 30 days):
Strictures
Strictures usually take about four to six weeks to appear and often develop at the junction between the stomach and the small intestine.
Symptoms include:
* Gradually becoming less able to handle solid foods compared to liquids.
* Experiencing pain when eating.
Diagnosis involves an upper gastrointestinal endoscopy.
Treatment usually involves using balloons or bougies to widen the stricture during an endoscopy. If the stricture remains tight and doesn’t improve with endoscopic treatment, surgery may be necessary to revise the connection between the stomach and the small intestine.
Marginal ulcer (MU)
An ulceration at the gastrojejunostomy is often seen after a gastric bypass, but it is less common with other bariatric procedures. It occurs in around 2-15% of cases, and this can vary based on the type of anastomosis, any existing chronic conditions and external factors like smoking or overusing painkillers such as ibuprofen.
Causes
There are a few things that could be causing this:
- Smoking
- Taking NSAIDs in higher doses or for a longer period (such as Ibuprofen, Naproxen or Voltaren)
- In some cases, it might also be found in larger or more swollen pouches with more acid-producing cells.
Symptoms
- Epigastric pain with eating
- Bleeding from gastric anastomosis
- Can also present as spontaneous perforation
Treatment
Most people will recover well with acid suppression and stopping smoking or taking NSAIDs.
If the perforation is not controlled, it is important to have surgery straight away.
If the perforation is controlled and the patient is stable, a conservative approach might work. This could involve placing a drain through the skin, giving fluids intravenously first and then feeding the patient through a tube later, followed by an endoscopy to check everything out.
Bile Reflux (Chronic)
(in patients post One anastomosis/Mini gastric bypass)
A known complication specific to OAGB.
Symptoms
- Epigastric burning
- Persistent nausea
- Bile vomiting
- Pain after eating
Diagnosis
- Endoscopy
Treatment
- PPIs, sucralfate, cholestyramine
- Refractory cases → surgical conversion to Roux en Y Gastric Bypass
Severe Malabsorption / Protein-Calorie Malnutrition
(in patients post One anastomosis/Mini gastric bypass)
More common in OAGB due to longer biliopancreatic limb.
Symptoms
- Muscle wasting
- Fatigue
- Oedema
- Micronutrient deficiencies (iron, B12, ADEK vitamins)
Diagnosis
- Nutritional blood panels
- Albumin, pre-albumin
Treatment
- High-protein supplementation
- Intensive nutritional support
- Limb length shortening or conversion to Roux en Y Gastric Bypass in severe cases
Post sleeve gastrectomy
(often seen in people who have had one-anastomosis (mini) gastric bypass)
Symptoms
- Burning in the upper abdomen
- Feeling sick all the time
- Vomiting bile
- Pain after eating
Diagnosis
- Endoscopy
Treatment
- First, we might try medication like PPIs (omeprazole, lansoprazole, etc.) and sucralfate to help with acid suppression. Also medication like cholestyramine can be used to reduce the irritation caused by bile acids coming back up from the stomach.
- If these don’t help, we might need to consider surgery to switch to a Roux en Y Gastric Bypass.
Severe Malabsorption / Protein-Calorie Malnutrition
This can be seen in people who have had gastric bypass surgery. It is more common in those who have had a one anastomosis or mini gastric bypass, as the longer biliopancreatic limb can contribute to this.
Symptoms
- Muscle wasting
- Fatigue
- Swelling (oedema)
- Deficiencies in essential nutrients like iron, B12 and ADEK vitamins
Diagnosis
- We will do some blood tests to check your nutrition.
- We will also measure your albumin and pre-albumin levels.
Treatment
Treatment options include:
- high protein supplementation,
- intensive nutritional support, and
- limb length shortening or conversion to Roux en Y Gastric Bypass for severe cases.
Post sleeve gastrectomy
Staple line leak
can occur anywhere along the sleeve staple line, but are almost always at the proximal end.
Symptoms
Leaks may present as peritonitis and sepsis (uncontained) or with subacute symptoms of pain, fever, tachycardia, nausea/emesis (usually contained).
Diagnosis
- CT scan
- Contrast swallow study
Treatment
- Uncontained leak should prompt immediate surgical exploration
- Contained leaks in stable patients can be managed highly successful with the use of percutaneous drain placement and endoscopic interventions (stents, fibrin glue injection, clips, sutures) if feasible
Strictures
typically take at least 4-6 weeks or later to develop as scar tissue forms and contracts.
Causes
Common mechanisms include:
- Ischaemia at the staple line causing scarring
- Twisting or kinking of the sleeve (functional narrowing)
- Overly tight sleeve created during the initial operation
Symptoms
Patients typically present with:
- Progressive intolerance to solids (more than liquids)
- Nausea and vomiting, especially after eating
- Epigastric or upper abdominal pain
- Sometimes reflux or sensation of obstruction
Diagnosis
The two most useful tests:
- Upper GI endoscopy – confirms the narrowing and allows potential treatment.
- Contrast swallow (UGI study) – shows delayed transit or narrowing.
Treatment
Most strictures respond well to endoscopic therapy:
- Endoscopic Balloon Dilation (First-line)
- Serial dilations over several sessions
- Most patients improve without needing surgery
- Stent Placement (Selected Cases)
- Temporary stents can help remodel the sleeve
- Surgical Revision
Considered when:
- The stricture does not respond to repeat endoscopic dilations
- There is severe kinking or torsion that cannot be corrected endoscopically
- Options include seromyotomy or sleeve-to-bypass conversion
Why Mr. Spyros Panagiotopoulos?
With years of experience in metabolic and bariatric surgery, as well as acute surgery, Mr Panagiotopoulos is well-equipped to offer the best solution for your needs. By collaborating closely with a team of experts, we will use treatments that are supported by research and provide strong follow-up to help you achieve your goals.
