Intracavitary electrocardiogram PICC placement guidance – Full Text
"Intracavitary electrocardiogram (IC-ECG) refers to the use of normal saline column or guidewire as a probe electrode to guide the electrocardiogram during central venous catheter-placement, and then determine the position of the catheter tip in real time according to the characteristic changes of the electrocardiogram P wave during the catheterization" Wang et al (2025).