Our hospital has just advised the staff that we should be doing more Midlines insteead of PICCs. We PICC nurss do question it when we feel a midline is not appropriate and place PICCs when they are a better option. However we are doing more midlines. We do them with the bard kit with seldinger technique and usually have about 12-15 cm in place. However after about 3-4 days they often dont give a blood return. Most reesearrch says they are good for 2 weeks or more. I actually hate midlines due to thier risk of infiltrates you cant see. We havee done a picc exchange if needed. Should we do a picc exchange if no blood rreturn?