Postoperative duplex scan surveillance of axillofemoral bypass grafts

Comparison of mean PSV at proximal axillary anastomosis for both grafts remaining continuously patent and grafts with thrombosis during observation during first 12 postoperative months.

Comparison of mean PSV at midportion of axillofemoral graft for both grafts remaining continuously patent and grafts with thrombosis during observation during first 12 postoperative months.

Comparison of mean PSV at distal axillofemoral anastomosis for both grafts remaining continuously patent and grafts with thrombosis during observation during first 12 postoperative months.

Univariate analysis of mean PSV at midportion of axillofemoral component comparing last recorded study in patent grafts with last study obtained before occlusion in subsequently occluded grafts.

Univariate analysis of mean PSV at distal axillofemoral anastomosis comparing last recorded study in patent grafts with last study obtained before occlusion in subsequently occluded grafts.

Univariate analysis of mean PSV at proximal axillary anastomosis comparing last recorded study in patent grafts with last study obtained before occlusion in subsequently occluded grafts.

Percent risk of subsequent graft occlusion with midaxillofemoral PSV less than or greater than 80 cm/s.

Multivariate odds ratio of graft failure with midaxillofemoral PSV less than 80 cm/s, outflow patency, blood pressure, ABI, smoking, presence of femoral-femoral bypass, and warfarin use, with 95 percent CIs.