Nephrotoxic effects in high-risk patients undergoing angiography

Area of Science:

• Nephrology
• Radiology
• Pharmacology

Background:

• Contrast-induced nephropathy (CIN) is a risk associated with iodinated contrast media.
• The comparative nephrotoxicity of iso-osmolar versus low-osmolar contrast media in high-risk patients remains unclear.

Purpose of the Study:

• To compare the nephrotoxic effects of iodixanol (iso-osmolar) and iohexol (low-osmolar) in high-risk patients undergoing angiography.
• To evaluate the safety of different osmolar contrast media in preventing kidney injury.

Main Methods:

• A randomized, double-blind, prospective, multicenter study.
• 129 diabetic patients with elevated serum creatinine were randomized to receive either iodixanol or iohexol.
• Primary endpoint: peak increase in serum creatinine within 3 days post-angiography.

Main Results:

• Iodixanol group showed significantly less increase in creatinine levels compared to the iohexol group (mean peak increase: 0.13 vs 0.55 mg/dL, P=0.001).
• Fewer patients in the iodixanol group experienced a ≥0.5 mg/dL creatinine increase (3% vs 26%, P=0.002).
• No patient receiving iodixanol had a ≥1.0 mg/dL increase, versus 15% in the iohexol group.

Conclusions:

• Iodixanol may be less nephrotoxic than low-osmolar contrast media in high-risk patients.
• The use of iodixanol could reduce the incidence of contrast-induced nephropathy in vulnerable patient populations.