Chinese Medical Sciences Journal ›› 2023, Vol. 38 ›› Issue (2): 117-124.doi: 10.24920/004158
• Original Article • Previous Articles Next Articles
Accuracy of Mean Value of Central Venous Pressure from Monitor Digital Display: Influence of Amplitude of Central Venous Pressure during Respiration
Meng-Ru Xu1, Wang-Lin Liu1, Huai-Wu He1, *(
), Xiao-Li Lai2, Mei-Ling Zhao3, Da-Wei Liu1, Yun Long1
- 1Department of Critical Care Medicine, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China
2Department of Critical Care Medicine, Beihai People's Hosptial, Beihai 536000, Guangxi Zhuang Autonomous Region, China
3Department of Critical Care Medicine, Zibo Central Hospital, Medical College of Shandong University, Zibo 255020, Shandong Province, China
-
Received:2022-08-23Accepted:2023-03-20Published:2023-06-30Online:2023-04-13 -
Contact:*Huai-Wu He, E-mail:tjmuhhw@126.com.
These authors contributed equally to this work.
Cite this article
Meng-Ru Xu, Wang-Lin Liu, Huai-Wu He, Xiao-Li Lai, Mei-Ling Zhao, Da-Wei Liu, Yun Long. Accuracy of Mean Value of Central Venous Pressure from Monitor Digital Display: Influence of Amplitude of Central Venous Pressure during Respiration[J].Chinese Medical Sciences Journal, 2023, 38(2): 117-124.
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Figure 1.
Flow chart of the enrolled patients and steps of CVP measurement. CVP: central venous pressure"
Figure 1.
Figure 2.
Illustration of the two CVP measurement methods in the monitor"
Figure 2.
Table 1.
Characteristics of the subjects (n=291)"
| Parameters | Total |
|---|---|
| Age (years) | 57.32 ± 16.18 |
| Sex (male/female) | 159/132 |
| Heart rate (bpm) | 92 ± 18 |
| Mean arterial pressure (mmHg) | 90 ± 14 |
| CVP-mean (mmHg) | 7.69 ± 3.10 |
| CVP-end (mmHg) | 8.26 ± 3.23 |
| |CVP-mean-CVP-end| (mmHg) | 1.03 ± 0.87 |
| CVPmax (mmHg) | 11.07 ± 3.58 |
| CVPmin (mmHg) | 5.36 ± 3.12 |
| CVPmax-CVPmin (mmHg) | 5.71 ± 2.48 |
Table 1.
Figure 3.
Bland-Altman plot shows the bias and limits of agreement of individual subjects’ differences between CVP-mean and CVP-end in the 291 pair measurements. The bias was -0.58 mmHg and the 95% LoA was from -2.97 to 1.81."
Figure 3.
Table 2.
Comparisons between consistent and inconsistent groups"
| Parameters | Inconsistent group (n=72) | Consistent group (n=219) | Statistics | P value |
|---|---|---|---|---|
| Age (years) | 56.44 ± 15.87 | 57.68 ± 16.33 | t = 0.30 | 0.544 |
| HR (bpm) | 93 ± 18 | 92 ± 18 | t = 0.13 | 0.961 |
| MAP (mmHg) | 89 ± 13 | 90 ± 14 | t = 0.51 | 0.773 |
| Pts with/without spontaneous breath | 59/13 | 146/73 | χ2 = 5.4 | 0.014* |
| CVP-mean (mmHg) | 7.72 ± 4.05 | 7.67 ± 2.74 | t = 0.15 | 0.787 |
| CVP-end (mmHg) | 9.38 ± 4.16 | 7.90 ± 2.78 | t = 3.41 | 0.004* |
| |CVP-mean-CVP-end|(mmHg) | 2.25 ± 0.63 | 0.635 ± 0.48 | t = 22.92 | <0.0001* |
| CVPmax (mmHg) | 12.04 ± 4.39 | 10.75 ± 3.22 | t = 2.67 | 0.014* |
| CVPmin (mmHg) | 4.88 ± 4.05 | 5.52 ± 2.75 | t = 1.51 | 0.196 |
| CVPmax-CVPmin (mmHg) | 7.17 ± 2.77 | 5.24 ± 2.18 | t = 6.07 | <0.0001* |
Table 2.
Figure 4.
Comparisons of ΔCVP (CVPmax-CVPmin) in the consistent and inconsistent groups. ΔCVP was significantly lower in the consistent group than in the inconsistent group (5.23 ± 2.18 vs. 7.16 ± 2.76, P<0.0001)."
Figure 4.
Figure 5.
Linear regression analysis of the relationship between |CVP-mean-CVP-end| and ΔCVP (CVPmax-CVPmin) measured in 291 subjects. Spearman’s r=0.283, P<0.0001. The frequency of subjects is labeled with different color and size of data points."
Figure 5.
Figure 6.
The performance (AUC) of receiver operating characteristic curves for using ΔCVP to predict |CVP-mean-CVP-end|<2mmHg is 0.709 (95% CI: 0.653 to 0.761, P<0.0001). AUC: areas under the ROC curve."
Figure 6.
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