Fig. 8
From: Ultrasound-guided peripheral venous cannulation in critically ill patients: a practical guideline
Amount of catheter residing in the vein. In a. the catheter dwelling in the vein is > 2.75 cm, in contrast with b. To achieve at least 2.75 cm of the catheter dwelling in the vein, several strategies can be used, for example, selecting veins at the lowest depth possible, using sloped insertion angles, and inserting catheters which are longer than usual, such as ultra-long peripheral catheters or midline catheters