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What Is Jejunal Interposition?

Jejunal interposition is reconstructive surgery in which a segment of jejunum is placed between two parts of the digestive tract to restore continuity or create a new passage. The jejunum is the middle portion of the small intestine. The segment can remain attached to its original blood supply as a pedicled graft or be transferred as a free flap with microsurgical vessel connections. The exact reconstruction depends on the organ removed or bypassed and the length of tissue that must be replaced.

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What Is Jejunal Interposition?

Jejunal interposition is reconstructive surgery in which a segment of jejunum is placed between two parts of the digestive tract to restore continuity or create a new passage. The jejunum is the middle portion of the small intestine. The segment can remain attached to its original blood supply as a pedicled graft or be transferred as a free flap with microsurgical vessel connections. The exact reconstruction depends on the organ removed or bypassed and the length of tissue that must be replaced.

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Why Is Jejunal Interposition Performed?

Jejunal interposition is used in selected complex reconstructions of the esophagus, pharynx, stomach, or upper digestive tract. It can provide an alternative conduit when the stomach is unavailable or unsuitable for esophageal reconstruction. Shorter interposed jejunal segments can also be used after selected gastric operations to restore food passage and reduce reflux. The choice among jejunum, stomach, colon, or another reconstruction depends on anatomy, previous surgery, blood supply, disease, and the length of the defect.

How Is Jejunal Interposition Performed?

The surgeon selects a healthy segment of jejunum with an adequate vascular supply and separates it according to the planned reconstruction. The segment is positioned between the two digestive structures and connected at each end with surgical anastomoses. A free jejunal flap requires microsurgical connection of its artery and vein to recipient blood vessels, while a pedicled segment keeps its native mesenteric blood supply. Long conduits can require additional vascular augmentation, sometimes called supercharging, to support blood flow.

What Is Recovery Like After Jejunal Interposition?

Recovery depends on the length of reconstruction, the disease being treated, and whether microsurgery or major chest, neck, or abdominal surgery was required. Nutrition can initially be provided through a feeding tube or another route while the new connections heal. Imaging or endoscopic evaluation can be used to assess anastomotic integrity, conduit function, or swallowing before diet advances. Rehabilitation can include swallowing therapy, nutritional support, wound care, and gradual progression from liquids to more solid foods.

What Are the Risks and Complications?

Possible complications include bleeding, infection, anastomotic leakage, bowel obstruction, fistula, narrowing at a connection, and delayed passage of food. Poor blood flow can cause partial or complete loss of the jejunal conduit, particularly after free tissue transfer or very long reconstructions. Abdominal complications can arise where the jejunum was harvested and reconnected. Some patients later require dilation, feeding support, revision surgery, or treatment for swallowing and nutritional problems.

Frequently Asked Questions About Jejunal Interposition

Is jejunal interposition used for esophageal reconstruction?

Yes. A jejunal segment can replace part or, with specialized techniques, a longer segment of the esophagus when another conduit is unsuitable.

Is jejunal interposition always a free flap?

No. Jejunum can be transferred as a free flap with microsurgical vessel connections or used as a pedicled segment that retains its original blood supply.

Why is the jejunum useful for digestive reconstruction?

Its diameter and natural peristaltic activity can suit selected upper gastrointestinal reconstructions. It also provides a well-vascularized segment of living intestinal tissue.

Can a jejunal interposition become narrowed?

Yes. Scar tissue can cause an anastomotic stricture and lead to swallowing or passage problems. Some strictures can be treated with endoscopic dilation.

References

Esophageal Reconstruction. StatPearls (NCBI Bookshelf). https://www.ncbi.nlm.nih.gov/books/NBK564336/. Date Accessed August 12, 2026.

Jejunal graft conduits after esophagectomy. PubMed Central (PMC). https://pmc.ncbi.nlm.nih.gov/articles/PMC4037414/. Date Accessed August 12, 2026.

Alternative conduits for esophageal replacement. Annals of Cardiothoracic Surgery. https://www.annalscts.com/article/view/14046/html. Date Accessed August 12, 2026.

A Comparison of Different Types of Esophageal Reconstructions. PubMed Central (PMC). https://pmc.ncbi.nlm.nih.gov/articles/PMC9457433/. Date Accessed August 12, 2026.

Supercharged pedicled jejunal interposition for esophageal replacement: a 10-year experience. PubMed. https://pubmed.ncbi.nlm.nih.gov/22939245/. Date Accessed August 12, 2026.