Background: The Michigan PICC-DVT Risk Score (MRS) identified five predictors for deep venous thrombosis (DVT) associated with peripherally inserted central catheters (PICCs): presence of another central venous catheter (CVC) when device is placed, white blood cell (WBC) count at time of insertion, active cancer, number of catheter lumens, and history of venous thromboembolism (VTE)1. We [...]