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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.
Abstract:
Thirty children undergoing cardiac surgery under cardiopulmonary bypass (CPB) were prospectively studied to assess beneficial effects of modified ultrafiltration (MUF) over and above conventional ultrafiltration (CUF). Transoesophaegeal echocardiography determined ejection fraction (EF), fractional area change (FAC) and posterior wall thickness in end-diastole and end-systole were measured and compared in two groups undergoing CUF (group I) and CUF plus MUF (group II). Haemodynamic data, haematocrit, temperature drift, postoperative chest tube drainage in first 48 hours, ventilation and intensive care unit (ICU) stay were also recorded. Within group data were analysed by general linear trend and intergroup comparisons were made with t-test. EF and FAC decreased at 0 min after CPB in both groups, but both recovered at 10 and 30 min after CPB in group II. Increase in EF and FAC in group II was about 12-15 % and 3-5 % from 0 min respectively. There was also significant improvement in posterior wall thickness and haematocrit (P<0.05) in group II. Patients in group II maintained better systolic blood pressure and heamoglobin after CPB. Chest tube drainage in first 48 hours was significantly less in group 1I (100 -18 verses 85 +/-20 ml, P<0.05), but ventilation and ICU stay were not different between the two groups. Combined ultrafiltration has beneficial effect an haemodynamics with improvement in EF and FAC. It improves haematocrit and decreases chest pulse drainage.
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