Fig. 1From: Critical causes in severe bleeding requiring angioembolization after percutaneous nephrolithotomyAnatomy of axial view of kidney. Puncture was defined as being a correct puncture if the fornix or papilla of the posterior calyx was punctured and the trajectory of the tract was within 20 degrees posterior to the frontal plane of the kidney (i.e., within Brödel’s line)Back to article page