Lung silhouette method in assessment of chronic obstructive pulmonary disease by transthoracic ultrasound | ||
| Journal of Recent Advances in Medicine | ||
| Articles in Press, Accepted Manuscript, Available Online from 01 January 2025 | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jram.2025.341879.1269 | ||
| Authors | ||
| Rana S. Abdelrahman* 1; Magd M. Galal1; Heba H. Eltrawy1; Heba M. Galal2 | ||
| 1Chest Diseases Department, Faculty of Medicine for Girls, Cairo, Al-Azhar University, Egypt. | ||
| 2Radiology Department, Faculty of Medicine for Girls, Cairo, Al-Azhar University, Egypt. | ||
| Abstract | ||
| Background: Chronic obstructive pulmonary disease (COPD) is a disease characterized by progressive airflow limitation with subsequent impairment of respiratory mechanics. The assessment of diaphragmatic function is crucial for understanding the disease impact on respiratory health. Objective: to evaluate relationship between COPD severity and diaphragmatic function measured by ultrasound using lung silhouette (LS) method in stable COPD patients. Methods: A case-control study was conducted on fifty stable COPD patients and fifty healthy controls. All of them subjected to medical history, pulmonary function tests, and diaphragmatic assessment using the lung silhouette method (the vertical displacement of the LS was evaluated during maximal inhalation and exhalation). Results: The COPD patients exhibited significantly reduced right and left LS (mm) [42.85 (30.6-44.7)] and [43.8 (31.7-46.2)] respectively, compared to of right and left LS (mm) of control group [67.35 (64.2-69.6)] and [68 (6 5.4-71.3)] respectively. Moreover, the RLS (mm) and LLS (mm) were decreased significantly in patients with GOLD E compared to those with either GOLD A or B, and in patients with GOLD B compared to those with GOLD A (p<0.05). A significant positive correlation was established between right and left lung silhouette and FEV1%. Additionally, both right and left LS were positively correlated with motion mode left and right diaphragmatic excursion. Conclusion: The LS method could be a reliable technique for assessing diaphragmatic function in patients with COPD. It is important to emphasize that the anterior axillary approach and LS method offer alternative approaches to evaluate COPD progression. Its integration into clinical practice can enhance the understanding of respiratory mechanics. | ||
| Keywords | ||
| COPD; diaphragmatic functions; thoracic ultrasound; lung silhouette method; respiratory mechanics | ||
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