Umbilical artery catheters in the newborn: effects of position of the catheter tip. Oxford, England: Cochrane Collaboration, 1998. (Accessed September 15, 2008, ...

Usually, the umbilical venous and arterial pH values are approximately equally deranged. 6 The hallmark of occlusion of the umbilical vein is widened differences between the vein and artery pH and ...