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Gastrojejunostomy – Procedure, Uses & Risks

A gastrojejunostomy is a surgical procedure that creates a direct connection between the stomach and the jejunum. It is used to bypass obstructions at the stomach outlet or as part of reconstructive surgery after tumor removal.

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Things worth knowing about "Gastrojejunostomy"

A gastrojejunostomy is a surgical procedure that creates a direct connection between the stomach and the jejunum. It is used to bypass obstructions at the stomach outlet or as part of reconstructive surgery after tumor removal.

What is a Gastrojejunostomy?

A gastrojejunostomy is a surgical procedure in which a direct connection (anastomosis) is created between the stomach and the jejunum – the middle section of the small intestine. The goal is to bypass the normal digestive pathway when it is blocked or no longer functional due to disease or anatomical changes. The procedure can be performed as open surgery, laparoscopically (minimally invasive), or endoscopically.

Indications: When is a Gastrojejunostomy Performed?

A gastrojejunostomy is indicated in various clinical situations where the normal passage of stomach contents into the duodenum is no longer possible or appropriate:

Gastric outlet obstruction: Narrowing or blockage of the pylorus caused by tumors, peptic ulcers, or benign scarring.
Pancreatic cancer: When a pancreatic tumor blocks the gastric outlet or the duodenum, a gastrojejunostomy is performed as a palliative measure to restore food passage.
Gastric cancer: In cases of advanced gastric tumors requiring partial or total gastrectomy.
Bariatric surgery: In gastric bypass procedures (e.g., Roux-en-Y gastric bypass) for the treatment of obesity, a gastrojejunostomy is a key component of the surgery.
Chronic pancreatitis: When inflammation-related changes cause obstruction of the duodenum or gastric outlet.
Postoperative reconstruction: After resection of the stomach or duodenum to restore digestive tract continuity.

How the Procedure is Performed

During a gastrojejunostomy, a loop of the jejunum is brought up to the stomach wall and joined to it using sutures or surgical staples, creating a new opening through which food can pass directly from the stomach into the small intestine. Several technical variations exist:

Ante- or retrocolic placement: The jejunal loop is routed either in front of or behind the transverse colon to reach the stomach.
Iso- or antiperistaltic anastomosis: Depending on the orientation of the connection relative to the natural direction of bowel movement.
Roux-en-Y reconstruction: A commonly used technique in which a Y-shaped connection is created between the stomach, the jejunum, and the biliary system to prevent bile reflux.
Endoscopic gastrojejunostomy: A minimally invasive technique performed using an endoscope and special stents (e.g., lumen-apposing metal stents, LAMS), particularly used in patients who are not suitable candidates for open surgery.

Benefits and Expected Outcomes

After a successful gastrojejunostomy, patients are generally able to resume oral food intake, either fully or at least partially. In palliative cases (e.g., pancreatic cancer), the primary goal is to improve quality of life. In bariatric surgery, the procedure not only creates a mechanical restriction but also induces hormonal changes in metabolism that contribute to sustained weight loss.

Risks and Possible Complications

As with any surgical procedure, a gastrojejunostomy carries potential risks and complications:

Anastomotic leak: A failure of the surgical connection to seal properly, which is a serious complication requiring immediate intervention.
Anastomotic stenosis: Scar tissue narrowing at the site of the new connection.
Bile reflux: Backflow of bile into the stomach, particularly in simple loop connections without Roux-en-Y technique.
Delayed gastric emptying (gastroparesis): Slowed or impaired stomach emptying following the procedure.
Bleeding: Intra- or postoperative hemorrhage at the anastomosis site.
Infections and abscesses: Inflammatory complications within the abdominal cavity.
Marginal ulcers: Ulcerations at the anastomosis site, particularly in bariatric patients.

Recovery and Follow-Up Care

After the operation, patients progress through a gradual diet advancement, beginning with clear liquids, then soft foods, and eventually a regular diet based on individual tolerance. Regular follow-up examinations, including endoscopic checks of the anastomosis when indicated, are essential. Bariatric patients who have undergone gastric bypass surgery require lifelong supplementation of vitamins and minerals due to reduced nutrient absorption.

References

Townsend, C. M. et al. – Sabiston Textbook of Surgery: The Biological Basis of Modern Surgical Practice. Elsevier, 21st Edition.
Wittgrove, A. C. & Clark, G. W. – Laparoscopic Gastric Bypass, Roux-en-Y: 500 Patients. Obesity Surgery, 2000.
World Health Organization (WHO) – Cancer Palliative Care. Available at: https://www.who.int/news-room/fact-sheets/detail/palliative-care

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