Normal small-bowel measurements by enteroclysis.

Small-bowel length, number and thickness of folds in the jejunum and ileum, diameter of the loops, and thickness of the bowel wall were measured on double-contrast small-bowel enema radiographs, obtained from 182 patients with no jejunal or ileal morphologic abnormalities. The length of the small bowel ranged from 160 to 430 cm, with an average length of 291 cm. No correlation was observed between the number of folds and the total length.