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Contrast-induced nephropathy: the wheel has turned 360 degrees.

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Area of Science:

  • Nephrology
  • Radiology
  • Cardiology

Background:

  • Contrast-induced nephropathy (CIN) is a significant complication associated with increased morbidity and mortality.
  • CIN is particularly prevalent in patients with advanced chronic kidney disease (CKD) and diabetes mellitus.
  • Despite numerous publications, effective CIN prevention strategies remain contentious and evolving.

Purpose of the Study:

  • To review and summarize current understanding and management strategies for contrast-induced nephropathy (CIN).
  • To highlight the association of CIN with chronic kidney disease (CKD) and diabetes.
  • To discuss the limited number of high-quality randomized controlled trials in CIN research.

Main Methods:

  • Review of over 900 publications on CIN from the past five years.
  • Analysis of the limited proportion (<5%) of randomized prospective controlled studies.
  • Evaluation of proposed methods to diminish CIN incidence, including contrast choice, pharmacologic manipulation, and volume expansion.

Main Results:

  • The pathophysiology of CIN remains uncertain, with renal blood flow reduction and tubular cell toxicity implicated.
  • Despite extensive research, significant changes in CIN management have been minimal.
  • Established approaches remain the most effective for reducing CIN risk.

Conclusions:

  • The most effective current approach to reduce CIN risk includes using the smallest effective dose of low- or iso-osmolar contrast media.
  • Volume expansion, cessation of nephrotoxic drugs, and avoiding repeat contrast injections within 48 hours are crucial.
  • Further high-quality randomized controlled studies are needed to advance CIN prevention and management.