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Bariatric surgery and its complications
Bariatric surgery is the most effective treatment for severe obesity and its associated type 2 diabetes; the indication is set by BMI and comorbidities, and the complications — leak, internal hernia, marginal ulcer and nutritional deficiencies — are what the exam asks about.
Why it matters in the exam
Under current guidelines, surgery is recommended from a BMI of 35 regardless of comorbidity, and considered from a BMI of 30 when there is metabolic disease, for example type 2 diabetes that is poorly controlled (thresholds are lower in Asian populations). The most common operation is the sleeve gastrectomy, which can worsen reflux; a Roux-en-Y gastric bypass is preferred for severe reflux or diabetes but carries more nutritional deficiencies.
Clinical questions focus on complications: a heart rate above 120 in the first days is a leak until proven otherwise, even when the abdomen looks quiet; recurrent abdominal pain after gastric bypass, even with a normal CT, needs laparoscopy for a suspected internal hernia; a marginal ulcer is linked to smoking and NSAIDs; and gallstones are common with rapid weight loss. In the long term iron, B12, calcium, vitamin D and thiamine must be monitored, and pregnancy should be delayed for a year to a year and a half after surgery.
Key points
- Indication: BMI of 35 or more, or 30–34.9 with metabolic disease.
- Sleeve — common, can worsen reflux; Roux-en-Y — preferred for reflux and diabetes.
- Heart rate above 120 — leak until proven otherwise.
- Recurrent pain after bypass — internal hernia; laparoscopy even with a normal CT.
- Lifelong supplements: iron, B12, calcium, vitamin D and thiamine.
Summary table
| Topic | Details | Exam note |
|---|---|---|
| Indications | BMI of 35 or more; BMI of 30–34.9 with metabolic disease (such as type 2 diabetes) | Lower thresholds in Asian populations |
| Sleeve gastrectomy | Longitudinal resection of most of the stomach | The most common operation; can worsen reflux; leaks usually near the angle of His |
| Roux-en-Y bypass | Small gastric pouch joined to a limb of bowel | Preferred for reflux and diabetes; internal hernia, marginal ulcer, dumping and deficiencies |
| Leak | Heart rate above 120, fever, pain, sometimes a quiet abdomen | Contrast CT, or re-operation when the patient is unstable |
| Internal hernia after bypass | Recurrent abdominal pain, sometimes a normal CT | Diagnostic laparoscopy |
| Nutritional deficiencies | Iron, B12, calcium, vitamin D, thiamine | Lifelong supplements and regular blood tests |
Free exam questions
בן 58 , , עם השמנת יתר BMI 43 עם תסמונת מטבולית. סובל מצרבת בעיקר בלילה. בגסטרוסקופיה בקע היאטלי קטן עם סמני דלקת בושת דיסטלית דרגה 3. טופל ב PPI עם שיפור. מה הניתוח בריאטרי המעודף למטופל הזה? (the question as examined, in Hebrew)
- א. SLEEVE GASTRECTOMY
- ב. ONE ANASTOMOSIS GASTRIC BYPASS
- ג. ROUX EN Y GASTRIC BYPASS
- ד. BILIOPANCREATIC DIVERSION
מה התיקון הכירורגי הנכון לפגיעה מסוג זה? (the question as examined, in Hebrew)
- א. Choledochotomy עם T-tube דרך החור
- ב. כריתת המקטע ושחזור קצה לקצה עם Transanastomotic T-tube
- ג. כריתת המקטע ושחזור Choledochoduodenostomy
- ד. כריתת המקטע ושחזור Roux-en-Y Choledochojejunostomy
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Sources
- ASMBS/IFSO Guidelines on Indications for Metabolic and Bariatric Surgery, 2022 — BMI thresholds and metabolic indications
- ASMBS Integrated Health Nutritional Guidelines for the Surgical Weight Loss Patient, 2019 — Micronutrient supplementation and deficiencies
- Sabiston Textbook of Surgery, 21st edition (2022) — Morbid Obesity
Sources are given for further reading; the text is written afresh and not copied from them.
Reviewed by the Examqo AI Professor · 2026-11-02. The text may contain errors; when in doubt, check the source.