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Updated: May 25, 2026
Microfluidics in Assessing Platelet Function
Published on: November 8, 2024
A prospective pilot study of platelet function and its relationship with postoperative bleeding in pediatric cardiac
M Ranucci1, C Carlucci, G Isgrò
1Department of Cardiothoracic-Vascular Anesthesia and Intensive Care, IRCCS Policlinico S. Donato, Milan, Italy. cardioanestesia@virgilio.it
Insights
This study found no direct link between platelet function and bleeding after pediatric cardiac surgery. Further research is needed to understand factors influencing bleeding in these young patients.
Area of Science:
- Cardiovascular Surgery
- Pediatric Cardiology
- Hematology
Background:
- Postoperative bleeding is a significant complication in pediatric cardiac surgery using cardiopulmonary bypass (CPB).
- Causes include coagulation factor consumption, hyperfibrinolysis, and platelet issues, with limited data on platelet function.
- This pilot study aims to explore platelet function changes and their link to bleeding in pediatric cardiac surgery patients.
Purpose of the Study:
- To investigate alterations in platelet function following pediatric cardiac surgery.
- To determine the relationship between changes in platelet function and the incidence of postoperative bleeding.
Main Methods:
- Prospective analysis of 22 pediatric patients (≤4 years) undergoing cardiac surgery.
- Platelet function assessed using multiple electrode aggregometry (TRAP-test) preoperatively and on postoperative days 1 and 2.
- Standard coagulation tests, including INR and activated partial thromboplastin time, were also performed.
Main Results:
- A non-significant decrease in overall platelet function was observed post-surgery, with 36% showing increased aggregability.
- Platelet count significantly decreased with CPB duration (P=0.001).
- Postoperative bleeding correlated with thrombocytopenia (P=0.014), elevated INR (P=0.001), and prolonged aPTT (P=0.002).
Conclusions:
- Platelet function exhibits variable patterns in pediatric cardiac surgery patients and was not directly associated with postoperative bleeding in this pilot study.
- Larger studies are required to investigate confounding factors such as patient age and cyanosis.
- The study highlights the complexity of bleeding etiologies in this population.
Background:
Postoperative bleeding is a major problem in pediatric cardiac surgery with cardiopulmonary bypass (CPB). It recognizes a multifactorial cause, inclusive of coagulation factors consumption, hyperfibrinolysis, incomplete heparin reversal, and platelet consumption. Limited information on platelet function is available. This pilot study investigates platelet function changes in pediatric cardiac operations and their relationship with postoperative bleeding.
Methods:
A cohort of 22 patients aged four years or less were prospectively analyzed. Besides the usual coagulation tests, they were studied for platelet function at four points in time: preoperative, arrival in the intensive care unit, first and second postoperative day. Platelet function was measured with multiple electrode aggregometry TRAP-test.
Results:
After the cardiac operation there was a non-significant decrease in platelet function, with 36% of the patients demonstrating increased aggregability. Platelet count demonstrated a significant (P=0.001) decrease related to the CPB duration. The International Normalized Ratio (INR) was significantly (P=0.001) increased after the operation. Postoperative bleeding was associated with the degree of thrombocytopenia (P=0.014), the increase in INR (P=0.001), and the prolongation of the activated partial thromboplastin time (P=0.002).
Conclusion:
In this pilot study, platelet function in pediatric patients undergoing cardiac surgery demonstrates a variable pattern and no association with postoperative bleeding. Confounding factors like age and cyanosis should be addressed with larger patient populations.
