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Chinese Journal of Lung Diseases(Electronic Edition) ›› 2024, Vol. 17 ›› Issue (06): 875-881. doi: 10.3877/cma.j.issn.1674-6902.2024.06.005

• Original articles • Previous Articles    

Association of pulmonary ultrasound with disease severity in connective tissue disease-associated interstitial lung disease

Bo1 Liang1, Chunyu Zhang2, Yongcai Zheng2, Bing Xu3, Minna Jiang1, Xuegang Zhao1, Xiaomin Liu1,()   

  1. 1.Department of Rheumatology and Immunology, Beijing Shunyi District Hospital,Shunyi Teaching Hospital of Capital Medical University, Beijing 101300, China
    2.Department of Ultrasound,Beijing Shunyi District Hospital, Shunyi Teaching Hospital of Capital Medical University, Beijing 101300,China
    3.Department of Radiology,Beijing Shunyi District Hospital,Shunyi Teaching Hospital of Capital Medical University, Beijing 101300, China
  • Received:2024-05-14 Online:2024-12-25 Published:2025-01-23
  • Contact: Xiaomin Liu

Abstract:

Objective

To analyze the correlation of lung ultrasound with the severity of connective tissue disease-associated interstitial lung disease (CTD-ILD).

Methods

All of 47 patients with connective tissue disease admitted to our hospital from November 2023 to January 2024 were selected.According to the results of high resolution CT (HRCT),24 cases of CTD-ILD were treated as observation group and the other 23 cases of CTD-non ILD were treated as control group.Lung function examination was performed in observation group.The results of pulmonary ultrasound examination,clinical and pulmonary function data,HRCT interstitial lesion score were statistically analyzed.

Results

The ultrasonographic B-line scores of 14 intercostal 25 (12,80),50 intercostal 79(37,265) and posterior basal intercostal 20 (0,30) in the observation group were higher than those of the control group 14 intercostal 0(0,0),50 intercostal 4(0,9) and posterior basal intercostal 0(0,3) (P<0.001).The area under the curve was 0.926 (95%CI:0.852-0.999, P<0.001) of intercostal lung ultrasound 50 and 0.951 (95%CI:0.890-1.000, P<0.001) of intercostal lung ultrasound 14.The area under the posterior basal intercostal curve was 0.813 (95%CI:0.683-0.942, P <0.001).B-line sensitivity of 50 intercostal,14 intercostal and posterior basal intercostal lung ultrasound was 83.3%,87.5%and 75.0%,respectively.The B-line specificity of 50 intercostal lung ultrasound,14 intercostal lung ultrasound and posterior basal intercostal lung ultrasound were 78.3%,87.0% and 73.9%,respectively.The cut-off values of B-line ultrasound score of 50 intercostal,14 intercostal and posterior basal intercostal lung were >10,3 and 2,respectively.The positive predictive values of 50 intercostal,14 intercostal and posterior basal lung ultrasound B-line scores were 87.5%,83.3% and 76.2%,and the negative predictive values were 78.3%,88.0% and 69.2%,respectively.Ultrasonographic B-line scores of 50 intercostal,14 intercostal and posterior basal intercostal lung were positively correlated with HRCT semi-quantitative scores (P<0.001),and negatively correlated with FVC/pre and DLCO/pre,respectively (P<0.001).The incidence of interruption of pleural line continuity was higher in observation group 17 cases(73.91%) than control group 4 cases(16.67%)(P<0.001).

Conclusion

Lung ultrasonography can determine the severity of CTD-ILD.14 intercostal lung ultrasound was better than 50 intercostal and posterior basal intercostal lung ultrasound in predicting CTD-ILD.

Key words: Connective tissue disease, Interstitial lung disease, Lung ultrasound, Disease severity

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