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.