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Acute Kidney Injury Associated With Radiocontrast may be Overestimated

by Shirley Johanna on September 30, 2016 at 6:03 PM
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Acute Kidney Injury Associated With Radiocontrast may be Overestimated

Radiocontrast or dye, which is commonly used during imaging tests is less hazardous than previously thought, according to a new analysis. Imaging studies that might help save or improve lives are unnecessarily being withheld from patients.

Radiocontrast are frequently used to enhance imaging with computed tomography scans or angiography; it can cause acute kidney injury (AKI). But, there has been little or no evidence regarding the incidence of contrast-induced AKI, with published rates ranging from <1% to >30% of exposed patients.

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Dr Emilee Wilhelm-Leen, Maria Montez-Rath, PhD, and Dr Glenn Chertow from the Stanford University School of Medicine analyzed 2009 information from the Nationwide Inpatient Sample to provide a more accurate estimate of the burden of AKI among patients receiving radiocontrast. The Nationwide Inpatient Sample is the largest publically available all-player inpatient care database in the United States.

After restricting the sample to hospitalizations for patients older than 18 years with lengths of stay ≤10 days, the investigators were left with 5,931,523 hospitalizations for analysis.
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The researchers stratified patients according to the presence or absence of 12 relatively common diagnoses associated with AKI and evaluated rates of AKI between strata. A model that controlled for patients' health and co-morbidities to estimate the risk of AKI associated with radiocontrast administration within each stratum.

Patients who received contrast did not develop AKI at a clinically significant higher rate than other patients. Patients who received radiocontrast developed AKI at a rate of 5.5%, compared with 5.6% of patients who did not receive radiocontrast.

After controlling patients' health and co-morbidities, the researchers found that administration was linked to a 7% lower likelihood of developing AKI.

"We show data suggesting that the risk of acute kidney injury related to radiocontrast administration has been overestimated, and we would like for physicians, including cardiologists, radiologists, and surgeons who frequently are faced with decisions regarding the use or non-use of radiocontrast-enhanced imagining studies, to take this information into account in their clinical decision-making," said Dr. Chertow.

The findings appear in the Journal of American Society of Nephrology (JASN).

Source: Medindia
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