Jejunal interposition is a surgical reconstruction technique in which a segment of the jejunum, the second portion of the small intestine, is harvested along with its blood supply and repositioned to replace a missing or diseased section of the esophagus or upper gastrointestinal tract. The procedure is most commonly performed when the stomach, which is the default organ for esophageal reconstruction, is unavailable or has been previously removed. It occupies a specialized but important niche in reconstructive surgery, and its modern form, often enhanced with microvascular “supercharging,” has made full-length esophageal replacement with jejunum a realistic option for both adults and children.
Why Surgeons Turn to the Jejunum
After esophagectomy, the standard approach is to fashion a tube from the stomach and pull it up into the chest to reconnect the alimentary tract. But some patients no longer have a usable stomach. Previous gastrectomy, radiation damage, caustic injury, or tumor involvement can all rule out a gastric conduit. In those situations, surgeons choose between the colon and the jejunum as alternative conduits.1PubMed. Long-segment, supercharged, pedicled jejunal flap for total esophageal reconstruction Jejunal interposition also comes into play after total gastrectomy for stomach cancer, where the surgeon must reconnect the esophagus to the intestinal tract, and in children born with long-gap esophageal atresia, a condition where a large stretch of the esophagus simply never formed.
Each of these scenarios calls for slightly different surgical planning, but they share a core challenge: the jejunum’s blood supply runs through a fan-shaped mesentery, and the segment must be long enough to bridge the gap without losing perfusion at its far end. That tension between reach and blood flow has driven much of the technical evolution of the procedure.
How the Operation Works
The operation begins with an abdominal incision to expose the jejunum and its mesentery. Surgeons identify and preserve specific vascular branches that will keep the graft alive. A segment of bowel is harvested starting roughly 20 to 40 centimeters past the ligament of Treitz, a landmark at the start of the jejunum. The mesentery is carefully divided between vascular arcades, with the goal of preserving enough circulation while freeing the segment to reach wherever it needs to go.2Operative Techniques in Thoracic and Cardiovascular Surgery. Use of Supercharged Jejunal Flap for Esophageal Reconstruction Transilluminating the mesentery, essentially shining a light through it, helps surgeons map the branching vessels and avoid accidental bleeding.
For esophageal replacement, the freed jejunal segment is routed upward, typically through a tunnel behind the breastbone, into the neck. Neck incisions allow the upper end of the graft to be sewn to the remaining cervical esophagus or pharynx. At the abdominal end, the graft is connected to the stomach remnant or to the duodenum, depending on how much of the original anatomy remains.3Annals of Thoracic Surgery. Long-Segment, Supercharged Pedicled Jejunal Interposition for Esophageal Replacement: How I Teach It The procedure is lengthy and technically demanding, with reported operating times averaging over nine hours when the stomach is preserved alongside the reconstruction.4PubMed. Jejunal interposition reconstruction with a stomach preserving esophagectomy improves postoperative weight loss and reflux symptoms for esophageal cancer patients
What “Supercharging” Means and Why It Matters
The biggest vulnerability of any jejunal conduit is its blood supply. The farther the graft stretches from its original vascular pedicle, the more likely the distant end will suffer from poor perfusion, potentially leading to tissue death or leaks at the connection points. Supercharging addresses this directly: after positioning the graft, the surgical team performs a microvascular anastomosis at the far end, connecting a small artery and vein from the graft’s mesentery to recipient vessels in the neck. The left internal mammary artery and vein or the transverse cervical vessels are commonly used as targets.5Operative Techniques in Thoracic and Cardiovascular Surgery. Use of Supercharged Jejunal Flap for Esophageal Reconstruction
This microvascular boost makes it possible to create conduits long enough to replace the entire esophagus, not just a short segment.6PubMed. Long-segment, supercharged, pedicled jejunal flap for total esophageal reconstruction In a ten-year series of 60 patients who underwent supercharged pedicled jejunal reconstruction, the technique successfully restored gastrointestinal continuity in a population where the stomach was unavailable as a conduit.7PubMed. Supercharged pedicled jejunal interposition for esophageal replacement: a 10-year experience The microvascular work requires specialized skills, often performed by a plastic surgery team using an operating microscope, though experienced surgeons can manage it with loupe magnification.
Monitoring Blood Flow During Surgery
Even with supercharging, confirming that the graft has adequate perfusion before closing the patient is critical. A promising intraoperative tool is indocyanine green fluorescence imaging, where a fluorescent dye is injected intravenously and a near-infrared camera reveals blood flow in the tissue in real time. In one reported series, this imaging helped confirm good perfusion in two patients and, in a third, revealed borderline blood supply after the graft was passed through the diaphragm, leading the team to abandon that particular graft before a complication could occur.8PubMed. Assessment of jejunal interposition perfusion using indocyanine green
Researchers have also used fluorescence endoscopy to quantify perfusion speed at the planned anastomosis site. In one study, when dye reached the tissue quickly (within about five seconds), the risk of anastomotic leakage or graft necrosis was under 2%. When perfusion was slower, the complication rate jumped to about a third of cases.9PubMed. Indocyanine green fluorescence imaging improves the assessment of blood supply of interposition jejunum These imaging techniques are still being refined, but they represent a meaningful step toward catching perfusion problems before they become surgical emergencies.
How Jejunal Interposition Compares to Other Conduits
The main alternatives are gastric pull-up, where the stomach is fashioned into a tube and brought up into the chest, and colon interposition, where a segment of the large intestine replaces the esophagus. A network meta-analysis comparing these approaches found that free jejunal flap had lower anastomotic leakage and mortality rates, while colon interposition had fewer strictures, and gastric pull-up was associated with the shortest hospital stays.10PubMed Central. A Comparison of Different Types of Esophageal Reconstructions: A Systematic Review and Network Meta-Analysis No single technique dominates across every outcome measure, which is why the choice depends heavily on the patient’s anatomy and what organs remain available.
When the stomach is available and the jejunum is used anyway, the comparison becomes more direct. One study using a comprehensive conduit assessment tool found that supercharged jejunal interposition performed comparably to a gastric conduit on measures of reflux, dumping, dysphagia, stricture, and conduit emptying.11PubMed. Super-Charged Pedicled Jejunal Interposition Performance Compares Favorably With a Gastric Conduit After Esophagectomy When the stomach was preserved and jejunal interposition used to bridge just the esophageal defect, patients recovered weight more effectively and had dramatically less reflux esophagitis than those who received a conventional gastric pull-up.12PubMed. Jejunal interposition reconstruction with a stomach preserving esophagectomy improves postoperative weight loss and reflux symptoms for esophageal cancer patients In that series, half the gastric pull-up group developed reflux esophagitis or Barrett’s epithelium on follow-up endoscopy, while no cases appeared in the jejunal interposition group.
Jejunal Interposition After Total Gastrectomy
When the entire stomach is removed for cancer, the surgeon must decide how to reconnect the esophagus to the small bowel. The two main options are Roux-en-Y reconstruction and jejunal interposition, sometimes called a “jejunal pouch” when configured to create a small reservoir. A meta-analysis found that patients who received jejunal interposition had substantially lower rates of both reflux esophagitis and dumping syndrome compared to those with a Roux-en-Y reconstruction.13PubMed Central. A meta-analysis of the efficacy of Roux-en-Y anastomosis and jejunal interposition after total gastrectomy A separate study found that patients with functional jejunal interposition after total gastrectomy lost less weight and had better nutritional markers, including hemoglobin and total protein, than those with Roux-en-Y reconstruction.14PubMed Central. Functional jejunal interposition, a reconstruction procedure, promotes functional outcomes after total gastrectomy
These benefits likely stem from the interposed jejunal segment slowing gastric emptying, much as the original stomach once did. A case report of a patient with severe dumping syndrome after a previous gastrectomy showed that placing a jejunal interposition segment between the stomach remnant and the small bowel completely resolved dumping symptoms and normalized gastric emptying patterns.15PubMed. The successful application of jejunal interposition for severe dumping syndrome: report of a case
For upper-third early gastric cancer, where partial gastrectomy is an option, a meta-analysis comparing proximal gastrectomy with jejunal interposition to total gastrectomy found that the partial approach with jejunal interposition preserved more weight and resulted in less hemoglobin loss at one year, with comparable rates of reflux and anastomotic complications.16Scientific Reports. Postoperative nutritional outcomes and quality of life-related complications of proximal versus total gastrectomy for upper-third early gastric cancer: a meta-analysis
Complications and What Can Go Wrong
The most feared complication is graft failure from inadequate blood supply. In a series of free jejunal grafts used after pharyngolaryngoesophagectomy, early graft failure from venous congestion occurred in about 7% of cases, and the authors noted that postoperative anticoagulation may help prevent graft necrosis.17Annals of Vascular Surgery. Outcomes of Pharyngolaryngoesophagectomy with Free Jejunal Graft Reconstruction Anastomotic leaks, where the surgical connections fail to heal properly, are another significant concern. One pediatric series reported that three of eleven free jejunal grafts required intraoperative redo procedures due to immediate graft loss, and upper anastomotic leaks developed in four cases.18PubMed. Oesophageal substitution with free and pedicled jejunum: short- and long-term outcomes
Functional obstruction is a longer-term issue. Because the transplanted jejunum loses its connections to the body’s extrinsic nerve network, it does not coordinate its contractions with the rest of the gut. In a comparative study of children with long-gap esophageal atresia, functional obstruction was recorded in nearly half of those who received jejunal interposition but in none who received a gastric pull-up.19PubMed. A two-center comparative study of gastric pull-up and jejunal interposition for long gap esophageal atresia Strictures at the anastomotic sites can also develop over time and may require dilation or revision surgery.
How the Graft Actually Functions Once Transplanted
A transplanted jejunal segment does not behave the way esophageal muscle does. The normal esophagus produces coordinated peristaltic waves that push food downward after each swallow. By contrast, motility studies have shown that swallowing generally fails to trigger contractions in the grafted jejunum. Instead, the graft generates its own cyclic contractile activity, a pattern characteristic of the small intestine’s migrating motor complex, but these contractions are not synchronized with the rest of the digestive tract. Food passes through the graft largely by gravity and liquid intake rather than active propulsion.20Gastroenterology. Function of a free jejunal “conduit” graft in the cervical esophagus
Clinically, most patients manage liquids and solids without major difficulty, though several describe needing sips of liquid to “flush” solid food through. Radiologic studies sometimes show a delay at the lower anastomosis. The graft is, in essence, a passive conduit that maintains its intrinsic intestinal motor patterns but has lost the ability to respond to the body’s meal-related signals. It works, but it works differently than the organ it replaces, and patients need to adjust eating habits accordingly.
Jejunal Interposition in Children
The most common pediatric indication is long-gap esophageal atresia, where a child is born without a large portion of the esophagus and primary repair is not feasible. A large single-center series of 55 children who underwent jejunal interposition (with a median age of four years) found that the vast majority had esophageal atresia as the underlying cause, with a smaller proportion resulting from caustic or peptic injury.21PubMed. Evolution, lessons learned, and contemporary outcomes of esophageal replacement with jejunum for children Contemporary cases in that series had significantly shorter intensive care stays and hospital stays compared to earlier historical cases, reflecting evolving surgical technique and perioperative care.
Microvascular augmentation proved especially valuable in children: when it was used, anastomotic leaks dropped to zero, compared to 18% without it. At a median follow-up of about two years, 78% of children were predominantly orally fed, and those who had been eating by mouth before surgery were significantly more likely to continue afterward.22PubMed. Evolution, lessons learned, and contemporary outcomes of esophageal replacement with jejunum for children Another small series found less stricturing and reflux with jejunal interposition than with primary repair in long-gap cases.23PubMed. Pedicled jejunal interposition for long gap esophageal atresia
Despite these results, a meta-analysis of the pediatric literature concluded that data on jejunal interposition in children remain limited, with only a few series providing meaningful numbers, and that the technique’s place relative to colon interposition and gastric pull-up still needs evaluation in larger studies.24PubMed. Long-gap esophageal atresia: a meta-analysis of jejunal interposition, colon interposition, and gastric pull-up Pediatric centers with specialized experience report good outcomes, but this is not an operation performed widely.
Long-Term Quality of Life
One of the most reassuring aspects of jejunal interposition is how well it seems to hold up over decades. A report on three pediatric patients followed for 21, 29, and 43 years after surgery found that none reported feeding difficulties, esophageal transit problems, reflux, drooling, or halitosis related to the graft. All described a highly satisfying quality of life. In adults, a follow-up study of supercharged jejunal interposition found that most patients maintained weight and good quality-of-life scores while eating a normal diet without supplemental nutrition.25PubMed. Long-term outcome and quality of life after supercharged jejunal interposition for oesophageal replacement
The graft does not deteriorate in any dramatic way over time, though patients typically live with certain adaptations: eating smaller meals, taking liquids with solid food, and sometimes needing periodic endoscopic dilation if strictures develop at anastomotic sites. These are trade-offs that most patients accept readily compared to the alternative of not being able to swallow at all.
The Merendino Procedure and the Gastroesophageal Junction
A more limited form of jejunal interposition, known as the Merendino procedure, involves placing a short jejunal segment between the distal esophagus and the stomach, essentially replacing just the gastroesophageal junction. It has been proposed as a treatment for conditions like undilatable esophageal strictures and recurrent benign lesions of the lower esophagus and cardia.26PubMed. Modification of the Merendino procedure The idea is that the interposed jejunum acts as a buffer, preventing acid reflux while preserving as much of the original anatomy as possible.
However, when used as a rescue procedure for patients with a previously failed anti-reflux surgery (fundoplication), results have been disappointing. One study concluded that the Merendino procedure appeared unsuitable for that particular indication, though the authors acknowledged that their sample size was small.27PubMed Central. Evaluation of resection of the gastroesophageal junction and jejunal interposition (Merendino procedure) as a rescue procedure in patients with a failed redo antireflux procedure The procedure remains in the surgical toolbox for select benign conditions, but it has not gained widespread acceptance for post-fundoplication salvage.
Experimental Metabolic Applications
Beyond reconstruction, researchers have explored whether rearranging the jejunum can influence metabolic diseases like type 2 diabetes. The idea draws on observations from bariatric surgery: bypassing portions of the upper small intestine appears to improve blood sugar control through mechanisms involving gut hormones. Animal studies using duodenojejunal bypass in obese diabetic rats showed marked improvement in blood glucose control, along with higher levels of the gut hormones GLP-1 and PYY, which play roles in insulin secretion and appetite regulation. When the effect of GLP-1 was blocked with an antagonist, blood glucose levels rose again, suggesting the hormone was a key mediator of the benefit.28PubMed. Effects of duodeno-jejunal bypass on glucose metabolism in obese rats with type 2 diabetes These findings remain preclinical, and jejunal interposition for metabolic purposes has not entered routine human practice, but the research underscores how rerouting the small intestine can produce hormonal effects well beyond what one might expect from a simple plumbing change.