Abstract
Homologous vein grafts are becoming increasingly useful in patients without suitable autologous saphenous veins for peripheral arterial bypass procedures [4, 81. However, fresh veins are the only tissue that has been used successfully in homograft vascular reconstruction in terms of long-term patency [4]. The advantages of a reliable method of long-term storage of viable vein segments and the ultimate creation of a vein “bank” are therefore apparent. Dimethylsulfoxide (DMSO) is a low molecular weight compound that diffuses readily across cell membranes [2] and has been shown to be an effective cryoprotectant avoiding cellular dehydration, a major cause of cell death during freezing [2]. The DMSO has been used for successful cryopreservation of other tissues [3, 61, but has not been utilized for vein graft preservation. This study assesses a method for the longterm preservation of viable vein segments by freezing in liquid nitrogen with DMSO cryopreservation.
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