A new concept for esophageal resection--prevascularization: an experimental study.

Area of Science:

• Veterinary Surgery
• Surgical Innovation
• Animal Models

Background:

• Esophageal resection presents surgical challenges, particularly in the cervical region.
• Improving blood supply to the esophagus is crucial for successful anastomosis and healing.
• Existing animal models may not fully replicate the complexities of cervical esophageal resection.

Purpose of the Study:

• To develop and evaluate a new two-step surgical animal model for cervical esophageal resection.
• To assess the efficacy of omental flap prevascularization in enhancing esophageal blood supply.
• To determine the feasibility and outcomes of segmental esophageal resection following prevascularization.

Main Methods:

• A two-step surgical procedure was performed on 10 dogs (17 operations total).
• Step 1 involved microsurgical transplantation of an omental flap to the cervical esophagus for prevascularization.
• Step 2, performed 14 days later, involved segmental resection of the cervical esophagus.

Main Results:

• Four out of five transplanted omental flaps survived the initial week post-transplantation.
• One flap experienced thrombosis.
• In two long-term survival cases, esophageal resection after prevascularization showed no major complications, with successful resection and flap integration aiding anastomosis healing.

Conclusions:

• The developed two-step model is a viable approach for cervical esophageal resection in dogs.
• Omental flap prevascularization can successfully improve esophageal blood supply and support anastomosis healing.
• This novel surgical technique demonstrates potential for future esophageal research and reconstructive surgery studies.