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中华重症医学电子杂志 ›› 2023, Vol. 09 ›› Issue (04) : 360 -367. doi: 10.3877/cma.j.issn.2096-1537.2023.04.004

临床研究

中国健康成人基于电阻抗断层显像肺通气参数参考范围的研究
徐梦茹, 何怀武(), 池熠, 孙晓桐, 隆云, 招展奇   
  1. 100730 北京,中国医学科学院北京协和医学院 北京协和医院 疑难重症及罕见病国家重点实验室 重症医学科
    710032 西安,空军军医大学生物医学工程系
  • 收稿日期:2022-11-14 出版日期:2023-11-28
  • 通信作者: 何怀武
  • 基金资助:
    国家自然科学基金面上项目(82272249); 国家重点研发计划课题(2022YFC2404805); 首都卫生发展科研专项(首发2020-2-40111); 中国医学科学院医学与健康科技创新工程项目(2021-I2M-1-062)

Study of reference range for lung ventilation parameters measured by electrical impedance tomography in Chinese health adults

Mengru Xu, Huaiwu He(), Yi Chi, Xiaotong Sun, Yun Long, Zhanqi Zhao   

  1. Department of Critical Care Medicine, State Key Laboratory of Critical Care and Rare Diseases, Peking Union Medical College, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
    Department of Biomedical Engineering, Air Force Military Medical University, Xi'an 710032, China
  • Received:2022-11-14 Published:2023-11-28
  • Corresponding author: Huaiwu He
引用本文:

徐梦茹, 何怀武, 池熠, 孙晓桐, 隆云, 招展奇. 中国健康成人基于电阻抗断层显像肺通气参数参考范围的研究[J]. 中华重症医学电子杂志, 2023, 09(04): 360-367.

Mengru Xu, Huaiwu He, Yi Chi, Xiaotong Sun, Yun Long, Zhanqi Zhao. Study of reference range for lung ventilation parameters measured by electrical impedance tomography in Chinese health adults[J]. Chinese Journal of Critical Care & Intensive Care Medicine(Electronic Edition), 2023, 09(04): 360-367.

目的

探究健康志愿者的电阻抗断层显像(EIT)肺通气相关参数参考范围以及变异情况。

方法

纳入75名健康志愿者,给予EIT检查,分析以下通气参数:分层感兴趣区(ROI 1、ROI 2、ROI 3、ROI 4)及象限感兴趣区(ROI左上、ROI右上、ROI左下、ROI右下)通气分布比例、通气中心(CoV)、腹-背侧通气比值(A/P ratio)、总体不均一指数(GI)、区域通气延迟指数(RVDSD)以及呼吸钟摆幅度(AP)的范围以及变异情况,分析年龄、性别、体质指数(BMI)对EIT通气参数的影响。正态分布的参数以mean±1.96 SD确定95%参考区间;偏态分布的参数以第2.5、97.5百分位确定参考范围上、下限。

结果

正态分布的参数参考范围如下,ROI 1:5.52~16.42,ROI 2:31.20~50.56,ROI 3:28.40~52.78,ROI 4:3.45~11.77,ROI左上:15.13~36.21,ROI右上:18.56~33.34,ROI左下:15.56~30.30,ROI右下:16.52~34.36,ROI左侧:47.38~49.82,ROI右侧:50.18~52.59,CoV:43.16~53.24,A/P ratio:35.66~60.74,GI:0.27~0.45,RVDSD:2.30~8.66;非正态分布的参数AP参考范围:0.21~4.93;其中CoV离散程度低,变异系数(CV)=0.05,而ROI 1(CV=0.25)、ROI 4(CV=0.28)、RVDSD(CV=0.30)、A/P ratio(CV=0.28)、AP(CV=3.68)的离散程度大。GI(R=0.33,P=0.00)、RVDSDR=0.31,P=0.00)、APR=0.44,P=0.00)与年龄呈现显著正相关性;通气分布ROI 1(R=0.23,P=0.04)、ROI右下R=0.23,P=0.04)、RVDSDR=0.25,P=0.03)、APR=0.25,P=0.03)与BMI呈现显著正相关性;女性受试者较男性具有较高的CoV(P<0.01)、ROI 3+4(P<0.05),而男性A/P ratio显著高于女性(P<0.05),差异均有统计学意义。

结论

在正常人群CoV变异小,相对稳定,而区域通气分布、AP具有较大的个体差异。建立正常人群的EIT通气相关参数参考范围,为临床应用提供重要参考。

Objective

To delineate the reference range and variability of electrical impedance tomography (EIT) lung ventilation parameters among healthy volunteers.

Methods

Seventy-five volunteers were enrolled, and their EIT data were analyzed. Various EIT-based parameters were computed, including ventilation distribution in regions of interest (ROIs) of layers from ventral to dorsal (ROI 1, ROI 2, ROI 3, ROI 4) or quadrants (ROIupper left, ROIupper right, ROIlower left, ROIlower right), center of ventilation (CoV), anterior-posterior ventilation ratio (A/P ratio), global inhomogeneity index (GI), standard deviation of regional ventilation delay (RVDSD) and amplitude of pendelluft (AP). The 95% reference interval for normally distributed parameters were determined by mean ± 1.96 standard deviations, while the 2.5th and 97.5th percentiles were employed for non-normally distributed parameters.

Results

The established reference ranges for the parameters were as follows: ROI 1: 5.52-16.42, ROI 2: 31.20-50.56, ROI 3: 28.40-52.78, ROI 4: 3.45-11.77, ROIupper left: 15.13-36.21, ROI upper right: 18.56-33.34, ROI lower left: 15.56-30.30, ROIlower right: 16.52-34.36, ROI left: 47.38-49.82, ROIright: 50.18-52.59, CoV: 43.16-53.24, A/P ratio: 35.66-60.74, GI: 0.27-0.45, RVDSD: 2.30-8.66, AP: 0.21-4.93. CoV had low dispersion with coefficient of variation (CV) of 0.05, while ROI 1 (CV =0.25), ROI 4 (CV =0.28), RVDSD (CV =0.30), A/P ratio (CV=0.28) and AP (CV=3.68) had high dispersion. GI (R=0.33, P=0.00), RVDSD (R=0.31, P=0.00), AP (R=0.44, P=0.00) showed a significant positive correlation with age. ROI 1 (R=0.23, P=0.04), ROI upper right (R=0.23, P=0.04), RVDSD (R=0.25, P=0.03), AP (R=0.25, P=0.03) were significantly positively correlated with BMI. CoV (P<0.01) and ROI 3+4 (P<0.05) in female subjects were remarkably higher than those in male subjects, and male A/P ratio was significantly higher than that in female subjects (P<0.05).

Conclusion

While CoV demonstrated relative stability, variations were observed in regional ventilation distribution, GI and AP within the population. Gender and BMI emerged as influential factors in interpreting EIT ventilation parameters, necessitating consideration in clinical applications.

图1 EIT分层ROI及象限ROI通气分布图。图a为EIT分层ROI通气分布;图b为EIT象限ROI通气分布 注:ROI为感兴趣区;EIT为电阻抗断层显像
表1 75名健康志愿者EIT肺通气相关参数参考值范围
图2 75名健康志愿者象限兴趣区、左右侧通气分布差异。图a为象限兴趣区的通气分布差异;图b为左右侧的通气分布差异。*P<0.05,**P<0.01,***P<0.001;nsP>0.05
表2 75名健康志愿者EIT参数与年龄、BMI的相关性(75例)
图3 75名健康志愿者EIT参数随BMI分布的散点图。图a为ROI 1 (%);图b为ROI右上(%);图c为RV DSD;图d为AP(%) 注:EIT为电阻抗断层显像;BMI为体质指数;ROI为感兴趣区
图4 75名健康志愿者不同性别间EIT参数分布的小提琴图。图a为ROI 4 (%);图b为ROI3+4(%);图c为CoV(%);图d为A/P ratio;图e为GI;图f为RVDSD*P<0.05,**P<0.01,nsP>0.05 注:EIT为电阻抗断层显像;ROI为感兴趣区;CoV为通气中心;A/P ratio为前-后通气比值;GI为总体不均一指数;RVDSD为区域通气延迟指数
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