The purpose of this protocol is to conduct a pilot prospective non-blind clinical trial to evaluate the efficacy and safety of a novel saline irrigation technique as an adjunct to standard interventions for treating retained pleural infections. Intrapleural fibrinolytic therapy (IPFT) is commonly used for infections not adequately managed with antibiotics and intercostal tube drainage, while saline irrigation serves as an alternative for cases with a high bleeding risk where IPFT is not feasible. The efficacy of saline irrigation combined with IPFT remains unexplored. The hypothesis is that saline irrigation could be an effective and safe addition to IPFT for patients with persistent pleural infections. The specific aims of the study include: Determine the efficacy of saline irrigation as add-on therapy to IPFT: Compare the clinical outcomes of patients receiving saline irrigation combined with IPFT to those receiving IPFT alone to determine if the addition of saline irrigation offers significant benefits. Outcomes include changes in inflammatory markers, imaging characteristics (echography and CT), volume of pleural fluid drained, chest tube duration, hospital length of stay, and the need for subsequent surgical intervention. Assess the safety and tolerability of saline irrigation plus IPFT: Compare complications and patient comfort in those receiving saline irrigation combined with IPFT to those receiving IPFT alone.