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Nephrotoxicity of low-osmolality contrast media
S M Laranja1, H Ajzen, N Schor
1Nephrology Division, Escola Paulista de Medicina, Universidade Federal de São Paulo, Brazil.
Renal Failure
|March 1, 1997
Summary
This study assessed renal function changes after low-osmolality contrast medium (CM) use. While 35% experienced mild, reversible renal function alterations, acute renal failure (ARF) occurred in 12.5%, with impaired renal function being a probable risk factor.
Area of Science:
- Nephrology
- Radiology
- Pharmacology
Background:
- Radiological contrast media (CM) can affect renal function.
- Low-osmolality CM are generally considered safer but require continued evaluation.
- Understanding risk factors for contrast-induced nephropathy is crucial.
Purpose of the Study:
- To prospectively evaluate renal function following the administration of a low-osmolality CM (ioxaglic acid).
- To identify potential risk factors for acute renal failure (ARF) in patients undergoing various radiological procedures.
- To assess the incidence and severity of renal function alterations.
Main Methods:
- Prospective analysis of 39 patients undergoing procedures with ioxaglic acid.
- Patient stratification into groups based on underlying conditions (control, hypertensive, mixed) and baseline renal function (moderate vs. mild deficit).
- Monitoring of renal function using creatinine clearance (CrCl) before and after CM administration.
Main Results:
- The incidence of acute renal failure (ARF) was 12.5% (5/40 patients).
- Renal function alterations occurred in 35% of patients, characterized as mild and reversible.
- Creatinine clearance (CrCl) proved to be the most effective parameter for monitoring renal function changes.
- No therapeutic interventions were required for the observed renal function alterations.
Conclusions:
- While low-osmolality CM use can lead to mild, reversible renal function changes, ARF remains a concern.
- Multiple factors likely contribute to ARF, making single risk factor identification difficult.
- Pre-existing renal impairment appears to be a significant risk factor for contrast-induced nephropathy.