IRCT20230518058225N9 IRCT 2025-02-22 Iran University of Medical Sciences Effect of Erector Spine Block and External Oblique Intercostal Block with Ultrasonography Guided to pain control Comparison of Erector Spine Block and External Oblique Intercostal Block with Ultrasonography Guided to pain control after laparoscopic cholecystectomy surgery a clinical trial 2025-03-10 anticipated 28 Complete https://irct.ir/trial/81801 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: Patients will be randomly divided into 2 groups. The randomization tool will randomize the table of numbers. Block randomization method will be used for randomization. Block randomization is for the purpose of making sure that exactly equal number of participants enter the study groups. The advantages of block randomization are that the balance of the number of participants in each group is guaranteed. For this purpose, 4 blocks will be formed and in each block 2 people from intervention group and 2 people will be placed in the control group. A total of 7 blocks will be considered to reach the sample size. Blocks contain numbers, numbers represent study groups. Their order will be determined by the statistician from the beginning. In order to hide the random allocation, opaque envelopes sealed with a random sequence will be used. In this method, each of the generated random sequences will be recorded on a card and the cards will be placed in the envelopes in order. became. In order to maintain a random sequence, the outer surface of the envelopes is numbered in the same order. Finally, the lid of the letter envelopes is glued and placed in a box. At the time of registration of participants, based on the order of entry of qualified participants into the study, one of the envelopes will be opened in order and the assigned group of that participant will be revealed, Blinding description: Patients will be aware that they will be randomly assigned to one of the two study groups, but will not know which method will be provided in that group. Patients will be assigned to one of two groups using a random number table. The person in charge of data collection, the analyst and the outcome evaluator will collect and analyze the information based on groups 1 and 2 and will not know the type of treatment in the groups and will be kept blind. 3 Pain. Intervention 1: Intervention group 1: In the erector spinae block group, the patient will be placed in the lateral position, then by examining the injection site and monitoring and necessary preparation, with the help of ultrasound guidance, the correct injection site on the transverse process of the 6th vertebra will be determined and inserted under ultrasound guidance. After reaching the site, after effective aspiration, 20 ml of 0.2% rupivacaine (manufacturer: Varian Pharmed) will be injected. Intervention 2: Intervention Group 2: In the external oblique intercostal block group, the patient will be placed in the supine position, then, by examining the injection site, monitoring, and necessary preparation, with the help of ultrasound guidance, the correct injection site will be determined in the mid-axillary line near the 6-7th rib, and the patient will be inserted under ultrasound guidance. After reaching the site, after effective aspiration, 20 ml of 0.2% rupivacaine (manufacturer: Varian Pharmed) will be injected. 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 After completing the work and consulting with all the writers and executive agents, I will make a decision.