spirometry and arterial blood gases were determined before operation and at approximately 6-month postoperative intervals in 11 patients weighing 137 +/- 22 kg ( 234 % +/- 41 % of actuarial ideal weight ) , who underwent a small bowel bypass which left 30 cm of proximal jejunum and 20 cm of distal ileum in end-to-end continuity .
C0021852
small bowel
C0022378
jejunum