Renal replacement therapy for AKI: When? How much? When to stop?

Area of Science:

• Critical Care Medicine
• Nephrology
• Intensive Care Unit (ICU) Management

Background:

• Severe acute kidney injury (AKI) requiring renal replacement therapy (RRT) is common in critically ill patients.
• Optimal RRT administration, including dose, timing, mode, anticoagulation, and fluid management, is not well-defined.
• Existing RRT dosing evidence uses fixed regimens, lacking personalization for individual patient status.

Purpose of the Study:

• To provide a comprehensive update on RRT delivery for critically ill AKI patients.
• To address practical questions regarding RRT treatment dose and timing.
• To synthesize current knowledge on RRT administration in the ICU.

Main Methods:

• Literature review focusing on RRT dose and timing in acute kidney injury.
• Analysis of existing evidence, including clinical trials and observational studies.
• Emphasis on practical clinical considerations for RRT management.

Main Results:

• Level 1 evidence exists for RRT dosing, but studies used fixed regimens.
• No consensus exists on the optimal timing for initiating or discontinuing RRT in AKI.
• Methodological limitations plague studies on RRT initiation timing.

Conclusions:

• Further research is needed to personalize RRT dose and establish optimal timing strategies.
• Clinical practice requires better guidance on RRT initiation, cessation, and dosing adjustments.
• Addressing practical RRT delivery questions is crucial for improving outcomes in critically ill AKI patients.