Monitoring patent ductus arteriosus is currently performed using echocardiography, an operator-dependent examination which requires holding the child on their back and which is potentially time-consuming. This test is usually carried out on days 2, 4 and 7 after birth.

NIRS (near-infrared spectroscopy) is a non-invasive method of monitoring tissue oxygen saturation using infrared light.

The aim of the study was to investigate an association between cerebral and renal NIRS data and ductus arteriosus status obtained by echocardiography.

Inclusion Criteria:

• Parent who has agreed to participate in the study
• Very premature newborn (born before 32 weeks' gestation)
• Hospitalised in the Neonatal Intensive Care Unit at Dijon University Hospital
• Before 48 hours of life

Exclusion Criteria:

• Newborn with congenital heart disease
• Newborn with a congenital renal anomaly
• Newborn with polymalformative syndrome
• Newborn with a skin anomaly
• Newborn with severe circulatory failure unrelated to the ductus arteriosus

Extremely premature newborn (born before 32 weeks' gestation)