| BST | basic specialist trainee |
| ETT | endotracheal tube |
| GA | gestational age |
| IVC | inferior vena cava |
| NICU | neonatal intensive care unit |
| RA | right atrium |
| SPR | specialist registrar trainee |
| UAC | umbilical arterial catheter |
| C | umbilical catheter |
| UVC | umbilical venous catheter |
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