High-volume hemofiltration in critically ill patients: a systematic review and meta-analysis

Area of Science:

• Nephrology
• Critical Care Medicine
• Intensive Care

Background:

• High volume hemofiltration (HVHF) is a proposed blood purification technique for systemic inflammatory syndromes.
• Its efficacy in critically ill patients requires thorough evaluation.

Purpose of the Study:

• To systematically review and meta-analyze the effects of HVHF versus standard volume hemofiltration in critically ill patients.
• To assess the impact of HVHF on mortality, renal recovery, vasopressor dependency, and cytokine reduction.

Main Methods:

• Systematic review and meta-analysis of randomized controlled trials.
• Included trials compared HVHF (>50 mL/kg/h) with standard volume hemofiltration.
• Primary outcome was mortality; secondary outcomes included renal recovery and adverse events.

Main Results:

• Seven studies (558 patients) were included: 4 on continuous HVHF and 3 on pulse HVHF (PHVHF).
• Neither continuous HVHF (OR: 0.85; 95% CI: 0.50-1.45) nor PHVHF (OR: 0.62; 95% CI: 0.22-1.74) significantly affected mortality.
• Continuous HVHF did not improve renal recovery in survivors (OR: 0.62; 95% CI: 0.17-1.97).

Conclusions:

• No clear overall beneficial effect of HVHF or PHVHF was detected compared to standard volume hemofiltration.
• Limited evidence suggested potential, but inconsistent, benefits for PHVHF in hemodynamic stabilization and cytokine clearance.