IRCT20200525047569N1 IRCT 2021-09-23 Shahid Beheshti University of Medical Sciences effect of posterior tibial nerve block on hallux valgus surgery Evaluation of the effect of tibialis posterior nerve block on postoperative pain and functional outcomes of patients undergoing hallux valgus surgery 2021-08-23 anticipated 60 Complete https://irct.ir/trial/55542 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Supportive, Randomization description: Random allocation of patients will be based on simple randomization and with the help of accepted methods of random sequence production based on the web. The randomizer.org site will be used by filling in the information on the number of patients, two target groups, assigning an equal number in each group, and selecting non-duplicate numbers in this plan. Based on the random sequence numbers generated at the site, patients will be divided into two groups of 30 people under intervention (A) and 30 people in the "Spinal Block" control group, Blinding description: patient do not know that if the anesthetic agent is injected for them in ankle joint and the outcome assessment is done by a person who does not know about the injected drug. N/A Ptients with hallus valgus deformity. Intervention 1: Intervention group: peripheral nerve blockage of posterior tibial concurrent with spinal block of hallux valgus surgery.5 ml bupivacaine 0.5% will be administered to posterior tibial nerve, at medial malleolar level and posterior to pulsation of the posterior tibial artery. Intervention 2: Control group: Spinal nerve block after hallux valgus deformity surgery. Yes - There is a plan to make this available What will be shared: From the beginning of winter 1400 When: From the beginning of winter 1400 To whom: From the beginning of winter 1400 Conditions: From the beginning of winter 1400 Where to obtain: From the beginning of winter 1400 How to obtain: From the beginning of winter 1400 Comments: From the beginning of winter 1400