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Related Experiment Videos

Nephrotoxicity from contrast material in renal insufficiency: ionic versus nonionic agents.

K G Harris1, T P Smith, A H Cragg

  • 1Department of Diagnostic Radiology, University of Iowa College of Medicine, Iowa City.

Radiology
|June 1, 1991
PubMed
Summary

Low-osmolality contrast agents significantly reduce the risk of contrast material-induced nephrotoxicity (CN) in patients with impaired renal function. Ionic contrast media were more likely to cause mild renal insufficiency exacerbation than nonionic agents.

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Area of Science:

  • Radiology and Nephrology
  • Pharmacology of Contrast Agents

Background:

  • Contrast material-induced nephrotoxicity (CN) is a risk for patients with impaired renal function.
  • The benefit of low-osmolality contrast agents in preventing CN remains debated.

Purpose of the Study:

  • To evaluate the impact of ionic versus nonionic (low-osmolality) contrast agents on renal function in patients with elevated serum creatinine.
  • To determine if low-osmolality contrast agents mitigate contrast-induced nephrotoxicity.

Main Methods:

  • A randomized study of 101 adult inpatients with serum creatinine levels between 1.4-2.4 mg/dL.
  • Patients received either ionic or nonionic contrast agents for contrast-enhanced computed tomography.
  • Serum creatinine levels were measured at 48 hours post-administration to assess changes.

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Main Results:

  • A statistically significant increase (≥25%) in serum creatinine occurred in 14% of patients receiving ionic contrast media versus 2% receiving nonionic agents (P < .05).
  • This difference was also observed in a subset of diabetic patients.
  • No cases of clinically significant contrast-induced nephrotoxicity were reported in either group.

Conclusions:

  • Nonionic (low-osmolality) contrast agents are associated with a lower risk of mild renal function decline compared to ionic agents in patients with impaired renal function.
  • While ionic agents may cause mild exacerbation of renal insufficiency, clinically important nephrotoxicity was not observed in this study.
  • Low-osmolality contrast agents appear beneficial in mitigating contrast material-induced nephrotoxicity risk.