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
typically take at least 4-6 weeks to develop and are most commonly at the GJ anastomosis.
Symptoms
- Progressive intolerance to solids more than to liquids
- Pain with eating.
Diagnosis
- Upper GI endoscopy
Treatment
- Most strictures respond to serial balloon or bougie dilation during endoscopy
- Surgical intervention (revision of anastomosis) if persistent tight stricture not responding to endoscopic interventions
Marginal ulcer (MU): ulceration at the gastrojejunostomy. This is typically only seen after gastric bypass and not with other bariatric procedures. The incidence is 2-15% and varies by anastomotic techniques and patient populations.
Causes
- Smoking and
- NSAID use (eg. Ibuprofen, naproxen, voltarol etc)
- Can also be seen with large or dilated pouches that have more acid producing parietal cells
Symptoms
- Epigastric pain with eating
- Upper GI bleeding
- Can also present as spontaneous perforations.
Treatment
Majority should heal with acid suppression and smoking/NSAID cessation
Uncontrolled perforation—urgent surgical intervention
Controlled perforation in stable patients may respond to conservative approach with percutaneous drain placement, parenteral initially and enteral feeding later on, endoscopic assessment
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
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.