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A left circumaortic renal vein was found in 11% of 74 left renal venograms, an incidence similar to that at autopsy. Cavography proved to be an unsatisfactory method of demonstrating the renal veins. Prior knowledge of a venous ring is important when blood samples from the adrenal or renal veins are to be collected. When caval interruption is planned, a circumaortic venous ring may provide a fully developed collateral pathway immediately after surgery if the procedure is planned without awareness of its presence.
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J. M. Kunkel and E. S. Weinstein Preoperative Detection of Potential Hazards in Aortic Surgery Perspectives in Vascular Surgery and Endovascular Therapy, January 1, 1989; 2(2): 1 - 14. [PDF] |
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