Figure 1From: Optimal site for ultrasound-guided venous catheterisation in paediatric patients: an observational study to investigate predictors for catheterisation success and a randomised controlled study to determine the most successful site Ultrasound-guided catheterisation for the cephalic vein in the proximal forearm. The 24-gauge catheter tip was visualized in the centre of the vein (arrow). White dots indicate 5-mm increments.Back to article page