First, the number of grafts supported with the FRAME device was limited (n = 4), which likely contributed to the marginally significant differences in patency rates and blood flows between groups.
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External Support of Autologous Internal Jugular Vein Grafts with FRAME Mesh in a Porcine Carotid Artery Model.
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The sentences
However, the obvious difference in patency rates narrowly missed statistical significance (Log-rank p = 0.071, Fisher exact p = 0.194), which was most likely due to the low number of grafts. 3.1.4.