Clinical Observation of the Position of Central Venous Catheter Aided with the Intravenous ECG Via Subclavian Vein

Objective: To evaluate the possibility of IVECG as a simple and reliable technique to monitoring the position of the catheter.Methods:80 adult patients scheduled for elective major surgeries and central venous catheterizations under general anesthesia were randomly divided into two groups,with 40 cases in each group.Patients all received right subclavian vein catheterization through the supraclaricular approach below right subclavian thyroid notch 1.0-1.5 cm.Patients in Group A received routine method,the depth of the catheter(L)=(H/10)-2;Patients in Group B adjusted the depth of the catheter based on the characters of IVECG.The position of the catheter was reassured by using posterior-anterior position X-ray examination after operation.Results:The depth of the catheter was(15.1±1.2)cm,(13.4±0.9)cm respectively;the rate of satisfactory catheter tip placement were 80% and 100% respectively.There were obvious statistical significance between the two groups(P0.05).Conclusion:Application of the catheter based on the characters of IVECG can monitor the variation of the depth of the catheter and also provide valuable information about the catheter that fails to be placed into the superior vena cava.It also can reduce costs associated with repositioning procedures.The technique is easy and safe to apply and should be widely used.