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Please confirm that an ethics committee approval has been applied for or granted: Yes: I’m uploading the Ethics Committee Approval as a PDF file with this abstract submissionBackground and Aims Anterior cruciate ligament (ACL) reconstruction on an outpatient basis requires adequate postoperative analgesic management for timely discharge home and to prevent readmission. The trend toward more distal, motor-sparing nerve blocks led to a change from femoral nerve block (FNB) to femoral triangle block (FTB). This retrospective analysis reports on the quality of postoperative analgesia provided by the FTB compared to the traditional FNB after ACL reconstruction.Methods Twenty-seven FNB and 18 FTB patients undergoing ACL repair were retrieved between January 2025 and May 2025. As per institutional protocol, patients received paracetamol, NSAIDs, dexamethasone, and LIA (20 ml of bupivacaine 0,5% with adrenaline). In the post-anesthesia care unit, pain was assessed using a numeric rating scale (NRS), and tramadol was administered as rescue analgesia based on breakthrough pain (NRS>4). At discharge, patients were prescribed scheduled paracetamol and NSAIDs (diclofenac), with tramadol 50 mg sublingual as a rescue analgesic. Patients were contacted on postoperative day 1 to evaluate the analgesic quality and patient satisfaction.Results Demographics were similar in both groups. NRS pain scores in the post-anesthesia care unit (PACU) were 4.9 on average in patients receiving FTB and 3.7 for FNB (p = 0.10). One FTB patient required a postoperative FNB rescue block. On postoperative day 1, no significant difference was observed in NRS scores, opioid consumption, and qualitative outcomes such as satisfaction of analgesia, sleepless nights, first food intake, and mobility. However, motor loss was more prevalent in patients receiving FNB (<0.05).Conclusions Lower PACU pain scores in patients receiving FNB compared to FTB could suggest higher analgesic potency of the FNB in patients receiving ACL reconstruction, especially since pain scores on postoperative day 1 were comparable. However, results were not significant and FNB was associated with more motor loss.