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Updated: Jun 29, 2026

A Large Animal Model for Acute Kidney Injury by Temporary Bilateral Renal Artery Occlusion
Published on: February 2, 2021
[Diuretics for acute kidney injury. Is there a rationale for their administration?]
1Direttore del Dipartimento di Medicina Critica, IMPANSA Docente Onorario del Centro di Nefrologia, Facolta' di Medicina, Universita' della Repubblica, Montevideo, Uruguay. rlombard@mednet.org.uy
Abstract:
Acute kidney injury (AKI) is a frequent and severe disorder that is observed in a variety of clinical settings. Early recognition of this syndrome is of critical importance in order to prevent progression to more severe forms, which are associated with a higher risk of complications and death. Efforts to prevent AKI have been made through a variety of interventions and drugs. However, no benefit has been demonstrated to date except for volume expansion and avoidance of nephrotoxic drugs. Diuretics have been extensively studied because of their main pharmacokinetic actions: reduction of renal vascular resistance and inhibition of active transport in the thick ascending limb, which reduces the energy requirement and eventually protects cells under ischemic conditions. Loop diuretics such as furosemide have been extensively tested to prevent AKI as well as to treat established AKI. Although experimental trials demonstrated that the administration of furosemide prevents the onset of AKI, no clinical trial has been able to reproduce this beneficial effect in humans. Moreover, there is evidence of impairment of renal function associated with it use. Like loop diuretics, mannitol induces diuresis in patients at risk of AKI but does not reduce its incidence. Recently, studies have demonstrated that natriuretic peptides such as h-ANP and nesiritide were associated with a reduction of the incidence of AKI in cardiac surgery patients. These promising results need to be confirmed in larger studies.
Insights
Preventing acute kidney injury (AKI) requires careful drug selection. While diuretics like furosemide and mannitol have been studied, they show limited benefit in preventing AKI in humans.
Area of Science:
- Nephrology
- Critical Care Medicine
- Pharmacology
Context:
- Acute kidney injury (AKI) is a common and serious condition across diverse clinical settings.
- Early detection and intervention are crucial to prevent severe complications and mortality.
- Current preventive strategies offer limited success, with volume expansion and avoiding nephrotoxins being the only proven methods.
Purpose:
- To review the efficacy of various interventions, particularly diuretics, in preventing acute kidney injury (AKI).
- To evaluate the role of loop diuretics (furosemide) and mannitol in AKI prevention.
- To explore the potential of newer agents like natriuretic peptides in mitigating AKI incidence.
Summary:
- Diuretics like furosemide and mannitol have been investigated for AKI prevention due to their renal effects, but clinical trials show no significant benefit in humans.
- Furosemide's experimental benefits in preventing AKI have not translated to clinical success, with some evidence suggesting potential renal impairment.
- Mannitol also induces diuresis but fails to reduce AKI incidence.
- Natriuretic peptides (h-ANP, nesiritide) show promise in reducing AKI in cardiac surgery patients, warranting further investigation.
Impact:
- Highlights the limited efficacy of commonly studied diuretics in preventing AKI, challenging previous assumptions.
- Identifies natriuretic peptides as a potential novel therapeutic avenue for AKI prevention, particularly in high-risk surgical populations.
- Emphasizes the need for larger, robust clinical trials to validate the protective effects of natriuretic peptides against AKI.
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