ObjectiveTo investigate the application and effect of ECG positioning catheter tip technique in peripherally inserted central catheters(PICC) placement through lower extremity vein in neonates.

MethodsA retrospective analysis was performed to select 39 neonates with PICC from January 2014 to December 2017 as control group, and 42 neonates with PICC from January 2018 to December 2020 as observation group.In the control group, PICC catheter was fixed and chest X-ray was taken after successful catheterization.In the observation group, when the catheter was sent to 2 cm longer than the predetermined length, the limbs on the puncture side of the children were in abducting flexion, the ECG monitor was connected, and normal saline was injected.The ratio of P wave to QRS wave appeared on the ECG monitor was 40%-50%.Then the catheter was slowly pulled out until the P wave was consistent with the P wave of the body surface electrocardiogram.According to the X-ray results, the accuracy of one-time placement of PICC and the completion rate of treatment were observed in the two groups.

ResultsThe accuracy of one-time placement of PICC in the observation group was 95.23%(40/42), which was higher than that of the control group(76.92%, 30/39)(P < 0.05).There was no significant difference in the treatment completion rate between the two groups(P>0.05).

ConclusionsECG can be used to assist the positioning of the tip of PICC catheter placement through the lower extremity vein in neonates, and the operation is simple, easy to master, safe and feasible, and worthy of clinical application.