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- Original Article P Wave Change Ratio; A Technique for the Central Venous Catheterization
- Do Sang Lee, M.D., Ph.D
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중심 정맥 도관삽입 시 P파의 변화비 - 이도상
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Journal of Clinical Nutrition 2007;1(1):19-22.
DOI: https://doi.org/10.15747/jcn.2007.1.1.19
Published online: December 31, 2007
Department of Surgery, Holy Family Hospital, The Catholic University of Korea, Bucheon, Korea
가톨릭대학교 의과대학 성가병원 외과학교실
가톨릭대학교 의과대학 성가병원 외과학교실
Received: 14 December 1901 • Revised: 14 December 1901 • Accepted: 14 December 1901
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Abstract
Purpose
This study examined the value of an electrocardiogram (ECG) in central venous catheterization (CVC) for nutrition support. Methods: The rates of change in the P wave and the QRS wave at limb lead II before and after catheter insertion were evaluated in 442 patients who underwent CVC with an ECG. After insertion, a plain chest X-ray was checked to confirm the location of catheter tip. Results: After catheterization, the P wave and the QRS wave increased together at 97%but the P wave (change rate: 0.5∼21.0) was more sensitive than the QRS wave (change rate: 0.5∼5.8). For an abnormal location (3%), the rate of change in the P wave and the QRS wave was ＜2.0 and ＜1.4, respectively. The sensitivity and the specificity of the P wave ＞2.0 were 95% and 100%, respectively. The sensitivity and the specificity of the QRS wave ＞1.4 were 90% and 100%, respectively. Conclusion: In central venous catheterization, ECG can be a useful method, and the normal position of the catheter tip can be estimated using the rate of change in the P wave ＞2.0 or the rate of change in the QRS wave ＞1.4. (JKSPEN 2007;1(1):19-22)
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