Objective To invesigate the rational of deciding the intubation depth of central venous catheterization based on Intra-atria Cardiogram.Methods Patients who underwent cardiac surgery with CPB were enrolled in this study.Intra-atria Cardiogram guided group included 200 patients,and routine catheterization group included 200 patients.In the observed group,as the guide wire and the catheter entered the vein,the outside tip of the guide wire was connected to an electrocardiographic unit and the intracardiac electrocardiography obtained from J-tip of the guide wire coude be observed.During operation,the tip position was observed,and after operation routine X-ray plain film examination was conducted.Results Total successful location rate increased from 58% to 91.7%,adult patients from 80% to 92.6%,wkile pediatric patients increased from 33.7% to 90.7%.Conclusions Intra-atria cardiogram based central venous catheterizatioh can increase the successful location rate and is a practical and reliable technique to ensure the placement of the catheter electrocardiography.Especially suit for pediatric patient.
