THE USE OF ULTRASOUND IN THE DIAGNOSIS OF FREE PLEURAL FLUID - A CASE STUDY AND LITERATURE REVIEW. International Journal of Innovative Technologies in Social Science, [S. l.], v. 3, n. 3(47), 2025. DOI: 10.31435/ijitss.3(47).2025.3769. Disponível em: https://rspublisher.org/index.php/ijitss/article/view/3769. Acesso em: 17 mar. 2026.