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Metabolic changes after jejuno-ileal bypass for obesity
Scandinavian Journal of Gastroenterology
|January 1, 1978
Summary
Jejunoileal bypass for obesity led to malnutrition and essential fatty acid deficiency. However, it improved glucose tolerance, normalized hyperinsulinism, and reduced lipids and iron, with careful monitoring for vitamin B12 and folic acid levels.
Area of Science:
- Bariatric Surgery
- Metabolic Medicine
- Nutritional Science
Background:
- Obesity is a complex metabolic disorder requiring effective treatment.
- Jejunoileal bypass (JIB) is a bariatric surgical procedure to address severe obesity.
Purpose of the Study:
- To investigate the metabolic consequences of jejunoileal bypass surgery.
- To assess changes in nutrient levels and metabolic parameters post-JIB.
Main Methods:
- Studied 6 patients before and for 18 months after JIB.
- Monitored plasma amino acids, serum fatty acids, oral glucose tolerance, insulin activity, lipid profiles, iron, TIBC, and vitamin B12/folic acid levels.
- Utilized Schilling test for vitamin B12 absorption assessment.
Main Results:
- Decreased essential amino acids, indicating protein-caloric malnutrition.
- Essential fatty acid deficiency observed in the first year post-surgery.
- Improved glucose tolerance and normalized hyperinsulinism.
- Significant reductions in serum triglycerides, cholesterol, and iron levels.
- Reduced vitamin B12 absorption and folic acid levels, necessitating supplementation in most patients.
Conclusions:
- Jejunoileal bypass induces significant metabolic changes, including malnutrition and deficiencies.
- The procedure effectively improves glycemic control and lipid profiles.
- Preservation of 25 cm distal ileum may be adequate for vitamin B12 absorption, but monitoring is crucial.
- Folic acid supplementation is often required post-JIB.