Is a Reintervention for Pediatric Cardiac Surgery Associated With Higher Blood Transfusion Requirements ?

Whereas in adult cardiac surgery, redo-interventions are clearly linked to a higher transfusion rate, this is not really known in paediatric cardiac surgery. In this retrospective study, the investigators will analyse our database for paediatric cardiac surgery patients aged 0-16 years and operated between 2002 and 2017. Patients with a single cardiac surgery will be compared to patients with a second cardiac operation under extracorporeal bypass. The investigators will test the variables for normal distribution using a Shapiro-Wilk test. Non normal distributed variables will be compared by a non-parametric test (Mann Whitney U), frequency analysis will be done by a Chi-Square test. A univariate analysis will determine predicting factors for transfusion. Factors with a P value < 0.1 will be analysed by a multivariate analysis to determine independent factors for transfusion. Odds with 95% confidence intervals will be calculated. A P value < 0.05 will be considered statistically significant.