Prospective observational study of predicted usage of intravenous cannulas inserted in a tertiary paediatric emergency department.

This study is consistent with the idle PIVC rates observed in PEDs but there is potential to further reduce this rate with targeted insertion. The paediatric clinicians' reliability in predicting PIVC use has been demonstrated for the first time and we have identified four groups where targeted phlebotomy rather than i.v. cannulation would reduce unused cannulas.