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Allogeneic vascular grafts are often required for vascular reconstruction during living donor liver transplantation. Such grafts are obtained prior to use, making storage conditions a critical issue for maintaining the integrity of the tissue to ensure a successful transplantation. This study describes an optimized storage protocol currently in use at a high-volume liver transplant center. Twenty-nine allogeneic vascular graft tissues obtained during cardiovascular surgery or from cadaveric donors were stored respectively in sterile 50 mL of Ringer lactate solution, without any preservation solutions or antimicrobials, at −22°C for a maximum of 3 months. Prior to use in vascular reconstruction, grafts were thawed in 0.9% NaCl solution at 37°C, and 1 × 0.5-cm2 tissue samples were collected for microbial culturing and viral serology. ABO compatibility was not performed for any patients receiving vascular grafts. During this prospective study, all 29 allogeneic vascular grafts were used for back-table vascular reconstruction in living donor liver transplantation procedures. A total of 16 grafts were from the saphenous vein, 10 were from the iliac vein, and 3 were from the iliac artery. Bacterial growth was not detected in any tissue samples taken from the stored grafts. No vascular graft-related complications occurred during the 5 months of follow-up. The successful vascular reconstructions achieved with all 29 study grafts demonstrate that the simple, inexpensive storage method described herein is feasible and safe. Randomized, controlled studies should be carried out to further optimize and standardize the technique.

Storage of Allogeneic Vascular Grafts: Experience From a High-Volume Liver Transplant Institute