Balanced ultrafiltration, modified ultrafiltration, and balanced ultrafiltration with modified ultrafiltration in...

Area of Science:

• Cardiovascular Surgery
• Pediatric Cardiology
• Biomedical Engineering

Background:

• Pediatric open-heart surgery often triggers an inflammatory response.
• Inflammatory mediators like TNF, IL-8, and E-selectin play a key role in this response.
• Ultrafiltration techniques are used during cardiopulmonary bypass (CPB) to manage fluid balance and remove inflammatory mediators.

Purpose of the Study:

• To evaluate the impact of balanced ultrafiltration (BUF), modified ultrafiltration (MUF), and a combination of both (B+M) on inflammatory mediators during pediatric CPB.
• To compare the efficacy of different ultrafiltration strategies in mitigating the inflammatory response in children undergoing congenital heart defect repair.

Main Methods:

• Eighty children with congenital heart disease were randomized into four groups: control, BUF, MUF, and B+M.
• Measurements of tumor necrosis factor (TNF), interleukin-8 (IL-8), and E-selectin were taken at multiple time points during and after CPB.
• Statistical analysis was performed to compare mediator concentrations across the groups.

Main Results:

• During CPB, TNF, IL-8, and E-selectin significantly increased in the control and MUF groups.
• In contrast, BUF and B+M groups showed no significant increase in these inflammatory mediators during CPB.
• During the MUF period, TNF and IL-8 increased, while E-selectin remained unchanged. BUF alone decreased mediator concentrations, while MUF concentrated blood.

Conclusions:

• Balanced ultrafiltration is effective in decreasing inflammatory mediators during pediatric open-heart surgery.
• Modified ultrafiltration primarily concentrates blood and can increase certain inflammatory mediators.
• Combining BUF and MUF negates the beneficial effects of BUF on inflammatory mediators, suggesting BUF is the superior technique for inflammatory control.