Monitor Faecal Calprotectin Concentration in Infants With Heart Defects

"Intervention - To monitor the impact of cardiac surgery and enteral feeding on gut inflammation, biomarkers (faecal Calprotectin) will be measured 24-48hrs after surgery and 24-48hrs after enteral feed commences. Additionally, infants that are diagnosed with NEC will have calprotectin levels measured.~Faecal calprotectin - 50-100mg of faeces will be collected in plastic containers from infant's nappies. Samples will then be homogenised by shaking, and supernatants and then sent to laboratories for immediate analysis."