Changes

*Individuals who have undergone kidney transplantation

In some emergent conditions such as [[CT of aortic aneurysm]] with suspected rupture, the need for contrast is greater than the risk of contrast-induced nephropathy.

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Departments often have formulas that give the amount of contrast needed for various investigations, using patient sex and weight as main parameters. These may include creatitine levels as well, and in such cases it can help to get a value of of much contrast would hypothetically have been given if the creatinine level was normal, such as for example 80 μmol/L or 0.9 mg/dL. This value can be compared to how much can actually be given in order to determine if it is worth doing the exam with contrast.

Risk factors can sometimes be treated or at least mitigated, especially if having suddenly appeared, such as a decreased renal function when it was previously normal. In such cases a common easily treated cause is dehydration.

'''Hydration''' by drinking or intravenous volume expander, either before or after contract administration, decreases the risk of contrast-induced nephropathy.<ref name="YangHiremath2013">{{cite journal|last1=Yang|first1=Xiaoming|last2=Hiremath|first2=Swapnil|last3=Akbari|first3=Ayub|last4=Shabana|first4=Wael|last5=Fergusson|first5=Dean A.|last6=Knoll|first6=Greg A.|title=Prevention of Contrast-Induced Acute Kidney Injury: Is Simple Oral Hydration Similar To Intravenous? A Systematic Review of the Evidence|journal=PLoS ONE|volume=8|issue=3|year=2013|pages=e60009|issn=1932-6203|doi=10.1371/journal.pone.0060009}}</ref>

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