A new experimental model for microanastomosis between vessels of different diameter

A new model for microvascular anastomosis between vessels of different diameter is described in the aorto-iliac region of the rat. The model consists of reversing the distal end of one iliac artery toward the aorta to perform an end-to-end or end-to-side microanastomosis, with 2:1 diameter ratio. The technique and the advantages of this model are presented and discussed.