Linear and circular stapled gastrojejunal anastomoses in Roux-en-Y gastric bypass: stomal diameter at onset and at long-term follow-up.

The mean diameter of the circular stapled gastrojejunostomy stomata at construction was 20 mm, that is, considerably larger than the 12 mm expected. After a mean of 5 years, the mean diameter had increased by 37%. The mean diameter of the linear stapled stomata increased by 25%.