IRCT20210213050348N2 IRCT 2021-09-01 Alborz University of Medical Sciences Evaluation of analgesia following Bupivacaine use in spine surgeries Evaluation of postoperative analgesia following wound infiltration with Bupivacaine 0.25 solution after posterior lumbar spine surgeries 2021-09-12 anticipated 90 Complete https://irct.ir/trial/54420 interventional Randomization: Randomized, Blinding: Triple blinded, Placebo: Not used, Assignment: Parallel, Purpose: Supportive, Randomization description: First, a number is assigned to each participant and then the numbers are evenly divided into three blocks of control, Bupivacaine and Bupivacaine-Epinephrine by Random allocation software using simple block randomization method. For this purpose, after installing the program, we determine the number of groups, the sample size and the name of each group. Then, the software places patients with different codes in different groups according to the size of the groups, Blinding description: The patient won't be aware of his/her study group after signing the consent form. The physician whom evaluates the outcome in the patient won't be present at the patient's operation and is not aware of the patient's study group. The data will be encrypted and the analyzer won't be aware of the patients' study groups. 2-3 Spine degenerative damage. Intervention 1: Control group: Bupivacaine won't be injected into these patients. Intervention 2: Intervention group one: Bupivacaine. 30 cc of 0.25% Bupivacaine solution will be infiltrated into the wound of the surgery after the operation is done. Intervention 3: Intervention group two: Bupivacaine and Epinephrine. 30 cc of 0.25% Bupivacaine and 1/200000 Epinephrine (in order to induce vasospasm and prolonging the time of drug in the tissue) will be infiltrated into the wound of the surgery after the operation is done. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is No more information.