IRCT2016120431225N1 IRCT 2017-03-12 Vice Chancellor for research of Iran University of Medical Sciences Transverse muscle block effect in analgesia after cesarean section - Comparison of the duration of analgesia following two method of posterior and lateral transverse abdominal blocks under ultrasound guidance after cesarean section 2015-12-21 anticipated 76 Complete https://irct.ir/trial/24608 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Other design features: To create analgesia in the lower abdomen after surgery, there are two main ways that we decided to compare the efficacy of both. N/A acute pain after cesarean section. Intervention 1: Intervention group 1: Posterior TAP block (quaderotus lumbrum) in the triangular space of petit (iliac crest and the inferior margin of the posterior border of the latissimus dorsi muscle and anterior of external oblique muscle). When the probe was in posterior axillary position (the exact location of the posterior block quaderotus Lombrum), sono anatomy at the first stage showed transverse abdominis and then internal and external oblique that were doing aponeurosis. Needle(number 23 dr japan) was inserted at the junction of abdominal and quaderotus lombrum muscles and 15 cc bupivacaine 0.25%(maylan made in france) was injected bilaterally. The time of injection was immediately after cesarean section and when the anaesthesia had dropped 2 to 3 levels. Intervention 2: Intervention group 2: lateral tap block was performed through the local injection of 15 cc anesthetic bupivacaine 0.25% using 23 gauge spinal needle (dr japan) at the junction of midaxillary line and transverse umblical line (between Coastal margin and iliac crest) between internal oblique and transverse abdominis muscles. The time of injection was immediately after cesarean section and when the anaesthesia had dropped 2 to 3 levels.