genitourinary disorders
Contrast Nephropathy
Diagnosis of Contrast Nephropathy
Serum creatinine measurement Diagnosis is based on a progressive rise in serum creatinine 24 to 48 hours after a contrast study. After femoral artery catheterization, contrast nephropathy may be difficult to distinguish from Renal Atheroembolism . Factors that can suggest renal atheroemboli include the following: Delay in onset of increased creatinine>48 hours after the procedure Presence of other atheroembolic findings (eg, livedo reticularis of the lower extremities or bluish discoloration of the toes) Persistently poor renal function that may deteriorate in a stepwise fashion Transient eosinophilia or eosinophiluria and low C3 complement levels (measured if atheroemboli are seriously considered) 