Jarosław Jarosławski, Dominik Tenczyński, Michał Kostro, Anna Żurakowska-Zadrożna, Wiktor Warda, Agata Klońska, Patrycja Trentkiewicz and Rafał Rajski 2025. 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. 3, 3(47) (Sep. 2025). DOI:https://doi.org/10.31435/ijitss.3(47).2025.3769.