The partial ileal bypass operation does not cause essential fatty acid deficiency

Area of Science:

• Gastroenterology
• Nutritional Science
• Metabolic Research

Background:

• Previous research suggested ileal resection could lead to essential fatty acid deficiency.
• The mechanism involves alterations in plasma fatty acid composition.

Purpose of the Study:

• To investigate if partial ileal bypass surgery causes essential fatty acid deficiency.
• To analyze serum cholesterol ester fatty acid composition in patients with prior ileal exclusion.

Main Methods:

• Determined serum cholesterol ester fatty acid composition in patients who underwent partial ileal bypass.
• Compared findings with matched control groups.
• Assessed bile acid and fat malabsorption levels.

Main Results:

• Patients with partial ileal bypass exhibited severe bile acid malabsorption and slight fat malabsorption (16 g/day).
• Serum cholesterol ester fatty acid composition in the ileal bypass group was identical to controls.
• Linoleic acid levels were similar (58% in controls vs. 61% in bypass patients).

Conclusions:

• Exclusion of the distal small bowel (up to 2.5 meters) does not induce essential fatty acid deficiency.
• Partial ileal bypass, despite malabsorption, does not alter serum cholesterol ester fatty acid profiles.
• Essential fatty acid status is maintained following significant ileal exclusion.