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Serial monitoring of graft patency and luminal diameter by ultrasonography. (A) Representative images of ultrasound. The graft luminal diameter was determined sonographically and patency was determined by measuring flow velocity proximal and distal to the graft. (B) Serial monitoring by ultrasound demonstrated no difference in graft patency and luminal diameter between groups at each time point. Color images available online at www.liebertpub.com/tec
