The small intestine may get blocked by twists around the scar tissue (adhesion) inside the abdomen after surgery. The other (but less common) cause of bowel obstruction is an internal hernia. These types of obstructions can arise at any time and even years after surgery. The chances of bowel obstruction after a laparoscopic sleeve are negligible. Most obstructions after laparoscopic surgery can be successfully repaired laparoscopically.