A Roux-en-Y anastomosis, referred to as Roux-en-Y, is a surgically created (end-to-side) anastomosis, that is typically between small bowel and small bowel that is distal from the cut end.
Diagramatically, the Roux-en-Y anastomosis looks like the letter Y with the two upper limbs of the Y representing the proximal segment of small bowel and the distal small bowel it joins with and the blind end that is surgically divided off, and the lower part of the Y is formed by the distal small bowel beyond the anastomosis.
Utilized in several operations and collectively called Roux operations.
Operations that make use of a Roux-en-Y include: some gastric bypasses, reconstruction following partial or complete gastrectomy for stomach cancer, hepaticojejunostomy, and choledochjejunostomy.
Laparoscopic procedure associated with a 3.3% rate of major complications and 27% minor complications.
Rouxt-en-Y gastric bypass among severely obese is associated with higher rates of diabetes remission and lower risk of cardiovascular and other outcomes over 6 years compared with non surgical control patients.(Adams TD et al).
Roux-en-Y gastric bypass is associated with depletion of vitamin B 12 in about 20% of patients.