Postoperative drainage with double 8F ultrafine chest tubes improves pain control and reduces specific complications in uniportal thoracoscopic lung tumor resection: a retrospective multicenter cohort study.

Background: Uniportal video-assisted thoracoscopic surgery (U-VATS) is a well-established minimally invasive approach for lung tumors, but consensus on the optimal size and number of postoperative chest tubes remains lacking. Ultrafine pigtail chest tubes may reduce tissue injury and improve wound healing compared with traditional drainage methods, yet evidence supporting their safety and feasibility in U-VATS patients is insufficient. Methods: This retrospective multicenter cohort study enrolled 1,076 lung tumor patients who underwent U-VATS across three Chinese hospitals. Patients were assigned to three groups: double 8F ultrafine chest tube ( Results: Multivariate analysis identified chest tube characteristics, pleural adhesions, postoperative infection, air leakage, intrathoracic hemorrhage, drainage volume as independent factors associated with drainage duration. After PSM (93 cases/group), the double 8F group had significantly lower NRS pain scores [postoperative days (POD) 1-3], reduced early drainage volume (POD1 and POD3), and lower incidences of atelectasis and intrathoracic hemorrhage (all Conclusion: Double 8F ultrafine chest tubes do not shorten drainage duration but effectively alleviate postoperative pain (especially on POD1), reduce early postoperative drainage volume, and lower specific complications. Aligning with enhanced recovery after surgery (ERAS) principles, they represent a promising drainage strategy for lung tumor patients after U-VATS.