Conference Coverage

VIDEO: SBO in bariatric patient can mean internal herniation


AT THE ACS Clinical Congress

– You get a call from the emergency department at 3 a.m. A 48-year-old woman is presenting with fever, nausea, vomiting, and left upper quadrant pain. And the patient says she had a gastric bypass procedure 3 years ago.

Time to panic? Not necessarily, but things can, and occasionally do, go bad for these patients, even if they have had a long-stable bypass, Jennifer Choi, MD, FACS, said in a video interview at the annual clinical congress of the American College of Surgeons.

“We do have to remember that our bariatric surgery patients can develop all of the same kinds of problems that anyone else can,” said Dr. Choi, a general surgeon at Indiana University, Indianapolis. “Appendicitis, diverticulitis, abdominal wall hernias, and other common things do happen.”

In her book, though, a patient with a gastric bypass who presents with a combination of small-bowel obstruction and pain has an internal herniation until proven otherwise.

“The symptoms can be subtle, and they can either have been building for several weeks or have an acute onset,” Dr. Choi said. These can include nausea, dry heaves, bloating, or nonbilious vomiting. Pain is typically located in the left upper quadrant or mid-back, especially if the hernia is located at one of the two most common spots: Petersen’s defect. This is the point where the biliopancreatic loop tends to slip under the alimentary loop and become trapped. Imaging will show a typical swirling of blood vessels around the herniation, accompanied by dilated small bowel at the point of obstruction.

At the other common herniation point, the site of the jejunojejunostomy, the alimentary loop can slip under the biliopancreatic loop. On imaging, jejunum will be seen in the upper right quadrant.

Both of these can be surgical emergencies, Dr. Choi said. “This needs an operation sooner, rather than later. It needs to be reduced and repaired.”

She typically performs this laparoscopically, but said that some surgeons prefer an open approach, which is a perfectly sound option.

“The key to a successful repair is to start at the ileocecal valve, because it is consistent and fixed, and run the bowel from distal to proximal to reduce the internal hernia. Then close the defect with a permanent suture,” she said.

Chylous ascites is almost always present in these cases because the herniation traumatizes the lymphatic system, Dr. Choi added. “It doesn’t all always have to be removed at the time of surgery, but just be aware that this is definitely something we do see, almost all the time in bariatric patients with these internal hernias.”

Dr. Choi had no financial disclosures.

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