I was wondering if this has happened to anyone, and what the correct action is. I entered a patients room and during my assessment noticed that blood had been drawn from a picc line and not flushed. I am not sure how long the lumen had been full of blood. I attempted to aspirate the old blood from the lumen with no success. Is this a appropriate time to use cathflow, or could attempting to instill the cathflow force a clot into the patients system? Thanks.