Intestinal infarction by internal hernia in Petersen’s space after laparoscopic gastric bypass

Table 1 Normal computed tomography findings after gastric bypass

1	The jejuno-jejunal anastomosis (and the biliary limb) on the left side of abdomen
2	Absence of loops behind the SMA
3	Absence of loops in mesocolic and mesenteric space
4	Mesenteric fan and jejuno-jejunal anastomosis deployed on the left side of abdomen

Table 2 Computed tomography signs of internal hernia after gastric bypass[7]

SIGNS	Sensitivity%	Specificity%
Swirled mesentery	61-83	67-94
Mushroom	33-72	89-100
Hurricane eye	6-17	100
Small-bowel obstruction	11-39	83-94
Clustered loops	6-17	72-83
Small-bowel behind superior mesentery artery	0-44	89-100
Overall impression	56-78	78-89
Right-sided anastomosis (or mesenteric fan deployed on the right side of abdomen)	6-11	100