227PARIETAL PLEURECTOMY AND PLEURAL ABRASION FOR PRIMARY SPONTANEOUS PNEUMOTHORAXThoracoscopic wedge resection is the standard surgery for treating primary spontaneous pneumothorax (PSP), but pleurodesis remains controversial. Pleurodesis is a surgery performed after wedge resection to reduce recurrence rates. After thoracoscopic wedge resection and pleurodesis, 104 patients were followed up in this study. According to the method of pleurodesis applied to all patients, two groups were created: apical parietal pleurectomy (group A) and pleural abrasion (group B). A review of medical records and direct contact with patients had been conducted to determine whether recurrence had occurred after surgery. Cox's proportional hazard model showed a significant difference between group A and B in terms of recurrence rate (11.3% vs. 14.1%). A thoracoscopic wedge resection with parietal pleurectomy was not significantly different from a pleural abrasion group when it came to age, gender, body mass index or smoking statusSwaroop@gmail.comResearch922019Primary spontaneous pneumothorax, Thoracoscopic wedge resection, Pleurodesis, Apical parietal pleurectomy, Recurrence rateDr. Sai SwaroopAssistant Professor, Department of General Surgery, Sri Lakshmi Narayana Institute of Medical Sciences, Puducherry - 605 502, India