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Pathophysiology of contrast medium–induced nephropathy
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Journal Article
Pathophysiology of contrast medium–induced nephropathy
2005
Overview
Pathophysiology of contrast medium–induced nephropathy.
Contrast medium–induced nephropathy (CIN) is a well-known cause of acute renal failure, but the development of CIN remains poorly understood. A number of studies have been performed with the one aim, to shed some light onto the pathophysiology of CIN. These have led to manifold interpretations and sometimes contradicting conclusions.
This review critically surveys mechanisms believed to mediate CIN by highlighting the complex pathophysiologic entity, including altered rheologic properties, perturbation of renal hemodynamics, regional hypoxia, auto- and paracrine factors [adenosine, endothelin, and reactive oxygen species (ROS)], and direct cytotoxic effects. Moreover, the importance of physicochemical properties of contrast media are made clear.
The more recently developed iso-osmolar contrast media are dimers, not monomers as the widely used nonionic low osmolar contrast media. The dimers have physicochemical features different from other contrast media which may be of clinical importance, not only with respect to osmolality. The viscosity of the commercially available dimers is considerably higher than blood.
Many experimental studies provide evidence for a greater perturbation in renal functions by dimeric contrast media in comparison to nonionic monomeric contrast media. Clinical trials have yielded conflicting results.
Publisher
Elsevier Inc,Nature Publishing,Elsevier Limited
Subject
Acute Kidney Injury - chemically induced
/ Acute Kidney Injury - physiopathology
/ Biological and medical sciences
/ Contrast Media - adverse effects
/ Contrast Media/adverse effects/chemistry
/ Diagnostic Techniques, Urological - adverse effects
/ Humans
/ Nephrology. Urinary tract diseases
/ Rheology
