Effect of Oscillatory Positive Expiratory Pressure in Sputum Retention, Pulmonary Function, and Thoracic Expansion in Open Abdominal Surgery -A Randomized Controlled Trial. International Journal of Physiotherapy, [S. l.], v. 12, n. 1, p. 98–103, 2025. DOI: 10.15621/ijphy/2025/v12i1/1679. Disponível em: https://www.ijphy.com/index.php/journal/article/view/1679. Acesso em: 7 may. 2026.