Perioperative Clinical Trials in AKI

Area of Science:

• Nephrology
• Critical Care Medicine
• Surgical Research

Background:

• Acute kidney injury (AKI) is a significant complication following surgery.
• Understanding current perioperative research is crucial for improving patient outcomes.
• Identifying effective strategies to mitigate perioperative renal dysfunction is a priority.

Purpose of the Study:

• To systematically review and characterize perioperative clinical trials focusing on renal end points.
• To identify current trends and findings in the management of perioperative kidney injury.
• To evaluate the efficacy of various interventions in preventing or treating perioperative AKI.

Main Methods:

• Systematic review of Medline database for perioperative clinical trials.
• Inclusion criteria: ≥100 adult patients, surgical procedures, renal end points, high-impact journals, published since 2004.
• Categorization of 101 identified trials by intervention type and summary of findings.

Main Results:

• Interventions targeting ischemia (inotropes, blood transfusion) showed limited benefit for AKI; goal-directed therapy with hemodynamic monitoring was potentially beneficial.
• Trials targeting inflammation/oxidative stress (NSAIDs, steroids, N-acetylcysteine, sodium bicarbonate) did not demonstrate renal benefits.
• High-dose perioperative statins increased AKI in some groups; balanced crystalloids were safer than saline and colloids; liberal fluid administration reduced AKI in open abdominal surgery.
• Remote ischemic preconditioning showed mixed results; novel surgical techniques and care processes were more effective than pharmacologic interventions in reducing AKI.

Conclusions:

• The translation of preclinical therapies for perioperative AKI into clinical practice remains challenging.
• Current evidence suggests that optimizing fluid management and employing specific surgical techniques are more promising for reducing perioperative AKI than many pharmacologic interventions.
• Further research is needed to develop effective pharmacological strategies to prevent and treat perioperative kidney injury.