• FaizSeyed Hamid RezaSHREndometriosis Research Center, Iran University of Medical Sciences, Tehran, Iran., Mahmoud Reza Alebouyeh, Pooya Derakhshan, Farnad Imani, Poupak Rahimzadeh, and Maryam Ghaderi Ashtiani.
• Endometriosis Research Center, Iran University of Medical Sciences, Tehran, Iran.
• J Pain Res. 2018 Jan 1; 11: 5-9.

BackgroundDue to the importance of pain control after abdominal surgery, several methods such as transversus abdominis plane (TAP) block are used to reduce the pain after surgery. TAP blocks can be performed using various ultrasound-guided approaches. Two important approaches to do this are ultrasound-guided lateral and posterior approaches. This study aimed to compare the two approaches of ultrasound-guided lateral and posterior TAP blocks to control pain after cesarean section.Materials And MethodsIn this double-blind clinical trial study, 76 patients scheduled for elective cesarean section were selected and randomly divided into two groups of 38 and underwent spinal anesthesia. For pain management after the surgery, one group underwent lateral TAP block and the other group underwent posterior TAP block using 20cc of ropivacaine 0.2% on both sides. Pain intensity was evaluated based on Numerical Analog Scale (NAS) at rest and when coughing, 2, 4, 6, 12, 24 and 36 hours after surgery.ResultsThe pain at rest in the posterior group at all hours post surgery was lower than the lateral group, especially at 6, 12 and 24 hours after the surgery and the difference was statistically significant (p=0.03, p<0.004, p=0.001).ConclusionThe results of this study show that ultrasound-guided posterior TAP block compared with the lateral TAP block was more effective in pain control after cesarean section.

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