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Abstract
The described method of transplantation of larynx and hypopharynx with thyroid and parathyroid glands using continuous hypothermic perfusion has the following advantages.
1. The blood supply of the transplanted specimen is practically normal.
2. The continuing cold perfusion keeps the transplanted larynx in good condition and allows the surgeons plenty of time to perform the operation.
3. Transplantation of thyroid and parathyroid glands in the same specimen together with the larynx ensures that the necessary hormones will be available to the dogs during the postoperative period.
4. Transplantation of hypopharynx in the same block together with larynx makes reconstruction of the pharynx easier.
5. Infusion of the donor dog's blood into the recipient helps the animal to survive the opsration.
6. The separate tracheostoma keeps the pharyngeal secretions out of the trachea and lungs, thus protecting them from infection. The idea of suturing th: caudal opening of the transplanted specimen aside from the midline serves the same purpose.