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Seeding and Implantation of a Biosynthetic Tissue-engineered Tracheal Graft in a Mouse Model

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Esophageal replacement using cryopreserved tracheal graft.

A Juhász¹, A Szilágyi, I Mikó

¹Department of Surgery, St. George University Teaching Hospital, Székesfehérvár, Hungary.

Diseases of the Esophagus : Official Journal of the International Society for Diseases of the Esophagus

|January 8, 2009

Summary

Cryopreserved animal trachea shows promise for esophageal replacement, demonstrating successful integration and no signs of insufficiency in beagle dogs. This study suggests its suitability for replacing short esophageal segments.

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Heterotopic and Orthotopic Tracheal Transplantation in Mice used as Models to Study the Development of Obliterative Airway Disease

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Published on: January 20, 2010

Area of Science:

Biomedical Engineering
Surgical Innovation
Veterinary Medicine

Background:

Esophageal replacement historically faces challenges with artificial materials, prostheses, and grafts.
Previous attempts with various grafts have yielded limited success.
A need exists for effective esophageal substitution materials.

Purpose of the Study:

To evaluate the feasibility of using cryopreserved animal trachea for esophageal replacement.
To assess the safety and efficacy of cryopreserved trachea as an esophageal graft in a canine model.

Main Methods:

A 6-cm cervical esophageal segment was replaced with cryopreserved trachea in 12 beagle dogs.
Grafts were stored at -86°C for 21 days and implanted using continuous sutures and a sternohyoid flap.
Postoperative monitoring included hematological parameters, air leak tests, graft diameter/length measurements, and histological analysis.

Main Results:

No esophageal insufficiency or suture dehiscence was observed; air leak tests were negative.
Graft diameter decreased from 19 mm to 15.8 mm, and length shortened from 60 mm to 47 mm.
Histology at 56 days confirmed complete integration of the trachea with the esophagus, with cartilage disintegration.

Conclusions:

Cryopreserved animal trachea is a viable option for replacing short (5-6 cm) esophageal segments.
The material demonstrates good biocompatibility and integration, with minor graft shrinkage and temporary hematological changes.
Further research may explore long-term outcomes and applications in esophageal reconstruction.