Platelet count and function in paediatric cardiac surgery: a prospective observational study

Area of Science:

• Cardiovascular Surgery
• Hematology
• Pediatric Critical Care

Background:

• Platelet abnormalities increase bleeding risk in patients.
• Pediatric cardiac surgery presents unique challenges for platelet function.
• Understanding platelet behavior is crucial for managing surgical complications.

Purpose of the Study:

• To evaluate platelet count and function during and after pediatric cardiac surgery.
• To investigate the impact of modified ultrafiltration on platelet parameters.
• To identify factors influencing platelet dysfunction and its association with transfusion needs.

Main Methods:

• Prospective observational study of 57 pediatric patients undergoing cardiac surgery.
• Analysis of platelet count and function (multiple-electrode impedance aggregometry) at multiple time points.
• Registration of intraoperative blood product transfusions.

Main Results:

• Platelet count and aggregation significantly reduced during cardiopulmonary bypass (CPB), with greatest reduction at CPB's end.
• Postoperative day 1 showed a 50% reduction in platelet count, while aggregation returned to baseline.
• Impaired platelet function during CPB correlated with increased intraoperative transfusion requirements.

Conclusions:

• Platelet count and aggregation are markedly reduced during and after pediatric cardiac surgery, particularly in neonates.
• Platelet aggregation recovery is faster than platelet count recovery.
• Intraoperative platelet dysfunction is a significant predictor of increased transfusion requirements.