The Risk Assessment Scale for Peripherally Inserted Central Venous Catheter (PICC) Related Thrombosis in Cancer Patients

Patients with PICC placement will be assessed by the Michigan Risk Score, Caprini Risk Assessment Model , Maneval scale（Chinese version） to predict the risk of PICC-related thrombosis. The time of evaluation are the day during PICC placement, 24-48h after PICC placement, and every time when patients receive PICC maintenance.