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Efficacy of combined modified and conventional ultrafiltration during cardiac surgery in children

Naresh Kumar Aggarwal1, Sambhu Nath Das, Gautam Sharma

  • 1Departments of Cardiac Anaesthesia and Cardiology Cardiothoracic Sciences Centre, All India Institute of Medical Sciences, New Delhi. drnaresh15@yahoo.co.in

Insights

Modified ultrafiltration (MUF) improved heart function and reduced chest drainage in pediatric cardiac surgery patients. This combined ultrafiltration technique offers significant hemodynamic benefits and better hematocrit levels post-surgery.

Area of Science:

  • Cardiovascular Surgery
  • Pediatric Cardiology
  • Critical Care Medicine

Background:

  • Pediatric cardiac surgery often involves cardiopulmonary bypass (CPB), which can lead to hemodynamic compromise.
  • Conventional ultrafiltration (CUF) is used to manage fluid balance during CPB.
  • The potential benefits of adding modified ultrafiltration (MUF) to CUF in pediatric patients require further investigation.

Purpose of the Study:

  • To prospectively evaluate the beneficial effects of modified ultrafiltration (MUF) in addition to conventional ultrafiltration (CUF) in pediatric patients undergoing cardiac surgery.
  • To compare hemodynamic parameters, hematocrit, and postoperative outcomes between patients receiving CUF alone versus CUF plus MUF.

Main Methods:

  • Thirty children undergoing cardiac surgery were divided into two groups: CUF (Group I) and CUF plus MUF (Group II).
  • Transesophageal echocardiography assessed ejection fraction (EF), fractional area change (FAC), and posterior wall thickness.
  • Hemodynamic data, hematocrit, temperature, chest tube drainage, ventilation, and ICU stay were recorded and analyzed.

Main Results:

  • Group II (CUF plus MUF) showed significant improvement in EF and FAC post-CPB compared to Group I.
  • Posterior wall thickness and hematocrit levels were significantly improved in Group II (P<0.05).
  • Group II experienced significantly less chest tube drainage in the first 48 hours (85 ± 20 ml vs. 100 ± 18 ml, P<0.05).

Conclusions:

  • Combined ultrafiltration (CUF plus MUF) demonstrates beneficial effects on hemodynamics, including improved EF and FAC in pediatric cardiac surgery patients.
  • MUF enhances hematocrit levels and reduces postoperative chest tube drainage.
  • While MUF improves key hemodynamic and hematological markers, it did not significantly alter ventilation or ICU stay in this study population.

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