Echo-guided Transverse Abdominal Plane Block (TAP) in Anterior Lumbar Arthrodesis (ALIF)

The goal of this interventional study is to is to compare the effect of a tap block versus a placebo in patients undergoing anterior lumbar spine surgery. The main question it aims to answer : • whether tap block can reduce the need for postoperative pain medication Participants will be randomized into two groups and all postoperative pain medication will be recorded over 3 days. Researchers will compare tap block vs placebo to see if it reduces postoperative pain.

Inclusion Criteria: Patient affiliated or entitled to a social security plan. * Patient who has been informed about the study and has co-signed a consent form with the investigator. consent to participate in the study. * Patients over 18 years of age scheduled for abdominal disc surgery on one or two levels. * Patient with ASA criteria 1, 2 and 3. Exclusion Criteria: * Patients with intolerance or contraindication to paracetamol, anti-inflammatory or morphine. * Patients allergic to local anesthetics. * Pregnant or breast-feeding patient. * patient undergoing cancer or trauma surgery trauma. * Patient participating in another interventional study. * Patient with a history of lumbar arthrodesis. * Patient refusing to sign consent form. * Patient unable to give informed consent. * Patient under court protection, guardianship or trusteeship. * Patient not available for study follow-up.