Total parenteral nutrition (TPN) is standard practice for preterm babies in modern neonatal intensive care units.1 Although more difficult to site, peripherally inserted percutaneous central venous catheters need to be replaced less frequently than peripheral cannulae and therefore have been shown to reduce interruptions in nutrition.2 The guidelines of the Centers for Disease Control and Prevention on prevention of infection related to peripherally inserted percutaneous central venous catheters3 recommends the use of “maximal …