When evaluating complications of venography, which problem is associated with the contrast used?

Kidney toxicity is a well-known complication associated with the use of contrast agents during venography procedures. Contrast agents, particularly those containing iodinated compounds, can lead to contrast-induced nephropathy, especially in patients who already have compromised renal function. The risks increase for individuals with pre-existing kidney conditions, dehydration, or other risk factors such as diabetes.

While hemorrhage, increase in blood pressure, and irregular heart rhythm can potentially occur in any invasive procedure, they are not specifically related to the contrast material itself. Hemorrhage may result from puncture sites or vessel injury, blood pressure changes may occur due to a variety of physiological responses or medications, and irregular heart rhythms could be triggered by several factors independent of the contrast agent. Hence, kidney toxicity is the primary concern tied directly to the use of the contrast material during venography.