Background-We sought to identify whether transcutaneous oxygen tension (tcPO 2 ) measurements could be used to noninvasively detect lesions in the arterial network supplying blood flow to the hypogastric circulation. Methods and Results-A study was undertaken in vascular patients with suspected (PC, nϭ43) and not with suspected (NPC, nϭ34) proximal ischemia. TcPO 2 was measured on both buttocks and with a chest reference electrode. Arteriography on the right or left side was positive for stenoses (Ն75%) or occlusion of one or more of the following arteries: the aorta, the common iliac arteries, or the internal iliac arteries.

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Morbidity and mortality in this study were greater than previously reported. Candidates for hybrid aortic repair should be carefully selected.