Overview Erector Spinae Plane Block With Ropivacaine for Major Upper Abdominal Surgery Status: Not yet recruiting Trial end date: 2021-08-01 Target enrollment: Participant gender: Summary Prospective, single-centre, randomized, controlled, open-label, evaluator-blinded, superiority trial. Phase: Phase 3 Details Lead Sponsor: Nazarbayev University Medical CenterCollaborator: National Research Oncology and Transplantology Center, KazakhstanTreatments: Ropivacaine