Modified ultrafiltration in paediatric cardiopulmonary bypass

Area of Science:

• Cardiovascular Surgery
• Pediatric Cardiac Surgery
• Critical Care Medicine

Background:

• Cardiopulmonary bypass (CPB) is a nonphysiological procedure linked to haemodilution, inflammation, fluid accumulation, and organ dysfunction.
• Managing fluid balance and inflammatory markers is crucial in pediatric patients undergoing cardiac operations.

Purpose of the Study:

• To evaluate the efficacy of modified ultrafiltration in pediatric patients after cardiac operations.
• To assess the impact of modified ultrafiltration on fluid balance, blood components, and cytokine concentrations post-CPB.

Main Methods:

• A randomized controlled study involving forty pediatric patients undergoing cardiac operations.
• Patients were divided into a control group and a modified ultrafiltration group.
• Blood cells, protein, and cytokine concentrations were monitored for 24 hours postoperatively.

Main Results:

• Modified ultrafiltration significantly concentrated blood cells and proteins (p < 0.001) by removing fluid at 50 ml/min.
• Tumor necrosis factor-alpha (TNF-alpha) concentration increased initially but changed little after albumin correction.
• Interleukin-8 (IL-8) and endothelin (ET) concentrations decreased significantly after ultrafiltration, especially after albumin correction.

Conclusions:

• Modified ultrafiltration is an effective technique for removing excess tissue fluid and concentrating blood following cardiopulmonary bypass.
• This method demonstrates potential in mitigating haemodilution and filtering specific inflammatory cytokines, contributing to improved patient outcomes.