Peripherally inserted central catheter (PICC) has the advantages of long-term indwelling, avoiding repeated puncture and effectively protecting peripheral blood vessels, and has been widely used in various clinical fields. The correct position of the PICC tip is an important guarantee for the safe use of catheter. If malposition occurs, it will shorten the catheter indwelling time, increase the incidence of complications, and even life-threatening in severe cases. This article summarizes the methods of PICC tip positioning and the related factors of malposition. In this article, in addition to conventional positioning methods, new positioning techniques such as Sherlock 3CG tip confirmation system and VasoNova vascular positioning system (VPS) combined with electrocardiogram (ECG) are proposed. This article points out that factors such as vascular factors, respiratory motion and intrathoracic pressure changes can lead to changes in the position of the PICC tip, in order to provide a reference for clinical medical and nursing staff to determine the position of the catheter tip and prevent catheter tip malposition.

The catheter self-management ability of carcinoma patients undergoing peripherally inserted central catheter (PICC) is closely related to the incidence of catheter complications. The lower the self-management level, the higher the incidence of catheter-related complications and adverse events. This paper mainly reviews the status quo, influencing factors, improvement approaches and evaluation methods of catheter self-management ability of carcinoma patients undergoing PICC so as to provide a reference for clinical medical staff to help carcinoma patients undergoing PICC improve catheter self-management abilities.