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| Relationship between the Position of the Tip of the Central Venous Catheter Positioned by Ultrasound and Flow Rate |
| DU Yue, LIU Huiling, DING Huajie, et al |
| The Affiliated Hospital of Chengde Medical College, Hebei Chengde 067000, China |
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Abstract Objective: To analyze the relationship between the position of catheter tip and flow rate in patients undergoing transjugular central venous catheter placement. Methods: 225 patients with maintenance hemodialysis were treated with transjugular central venous catheterization. According to the position of the tip of the catheter, the Group 1 is located in the superior vena cava, the Group 2 is located in the upper middle level of the right atrium (including the upper vena cava into the right atrium level), and the Group 3 is in the other locations within the heart chamber. The actual pump flow (ml/min) at the arteriovenous end of the catheter within 1 hour after the first use of CVC for dialysis within 24 hours after surgery was recorded, and the flow between the groups was compared. Results: The median blood flow of the Group 1 was 240 ml/min. The median blood flow of the Group 2 was 250 ml/min, and the median blood flow of the Group 3 was 230 ml/min, there was a statistically significant difference (P<0.05) in catheter flow between the three groups with different catheter tip positions. Further comparison between the groups was made, p (Group 1/Group 2)=0.001、p (Group 2/Group 3) = 0.000, difference was statistically significant. Conclusion: The dialysate flow of the central venous catheter through the internal jugular vein is related to the tip position of the catheter. The best level of blood flow is in the upper middle part of the right atrium. Ultrasound monitoring the tip position of the catheter has a certain value.
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2020, Vol. 26 
