Objective To compare the consistency of two different peripherally inserted central catheters (PICC) catheter tip positioning methods of the chest X-ray and full digital color cardiovascular ultrasound diagnostic system in PICC patients. Methods A total of 157 cases of patients who underwent PICC catheterization in Tianjin Medical University General Hospital from 1st March to 31st December 2015 were selected. Self-control trial was applied, using full digital color cardiovascular ultrasound diagnostic system to determine the position of the catheter tip when implanting and using chest X-ray to reconfirm after catheterization. Results All 157 cases of patients were catheterized successfully. The correlation between the two methods of localization was tested, Spearman correlation coefficient rs=0.450 (P<0.001) , Pearson serial number r=0.710 (P<0.001) , showed that the two localization methods had certain relevance. The consistency test results showed that Kappa value was 0.390 (P<0.001) in the three classification method, and Kappa value was 0.707 (P<0.001) in the two classification method, and the two localization methods had certain consistency. The sensitivity of the cardiovascular ultrasound method was 98.6%, and the area under the ROC curve (AUC) was 0.917 (P<0.001) , which showed a higher accuracy in cardiovascular ultrasound method. Conclusions Cardiovascular ultrasound can be used as another clinical method to determine the position of the PICC catheter tip, and it is worthy of promotion in clinical practice. Key words: Cardiovascular ultrasound; Peripherally inserted central catheters; Catheter tip position
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