Comparison between bupivacaine liposome injectable suspension and ropivacaine as local anesthetics for transversus abdominis plane block in postoperative pain management after laparoscopic sleeve gastrectomy: a randomized controlled trial

BLIS offers prolonged analgesic effects, extending up to 72 h, and significantly reduces the reliance on additional analgesics, making it a valuable option in multimodal pain management for LSG. However, its impact on enhancing ERAS-related outcomes requires further investigation. Trial registration registration number ChiCTR2500104979, registration date 2025-06-26 00:00:00 (retrospectively registered).