Abstract: Objective To explore the feasibility of the in situ displacement of peripherally inserted central catheter (PICC)in elderly patients.Methods A total of 26 patients with PICC who needed new catheters were given in situ displacement of PICC.Successful rate of puncture, hemorrhagic complications (local errhysis and swelling formation)and catheter-associated compli-cations (phlebitis)were observed.Results All patients were successfully displaced catheters,and X-ray showed the end of PICC catheters were placed rightly on the inferior margin of T6~T7 levels, in which 24 patients were successes by the first surgery and 2 by the second one.The mean catheter stays was 6~12 months,and no patients had relevant complications like severe hemorrhagic compli-cations,venous thrombosis and air embolism,etc.Conclusion In situ displacement of PICC is sim-ple in operation and slight in trauma,which can be effectively and safely applied in elderly patients.