IRCT20131108015322N3 IRCT 2020-05-25 Shahid Beheshti University of Medical Sciences "Effect of combined sciatic –femoral nerve blocks and lateral femoral cutaneous nerve on thigh tourniquet pain in foot and ankle orthopedic surgery" Comparison of the effectiveness of combined sciatic –femoral nerve blocks together with lateral femoral cutaneous nerve block on thigh tourniquet pain with spinal anesthesia in foot and ankle orthopedic surgery patients 2019-05-15 anticipated 50 Complete https://irct.ir/trial/48297 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: Participants are randomly assigned to 1 of 2 groups following simple randomization by using a random numbers table . The allocation sequence was concealed in sequentially numbered, opaque, sealed envelopes. After acceptance of the eligible patient and in the operating room, the numbered envelope is opened by an investigator with no clinical involvement in the trial. Randomization and assignment of patients is done by a person not involved in the study. The person who measures the outcome in two groups is also kept blinded. N/A Treatment of thigh tourniquet- related acute pain during lower limb surgery. Intervention 1: Control group: In the patients in the control group, the standard method of spinal anesthesia is performed in the lateral position. 3 ml of 0.5% hyperbaric bupivacaine is injected intrathecally using a 25G Quincke spinal needle. Then the patients are placed in the supine position. Intervention 2: Intervention group:In this group, blockade of popliteal, femoral nerve (FN), and lateral femoral cutaneous nerve (LFCN) block are performed under the guidance of ultrasound (SonoSite S-Nerve, Bothell, WA, USA) using a 6-13 MHz linear transducer and a 22G-bevel 30°, 85 mm block needle (Visioplex®, Vygon, Ecouen, France). In the lateral position, 20 ml of 1.5% lidocaine with epinephrine 1:200000 + bicarbonate is administered for popliteal block . 15 ml and 5 ml of the same solution is injected for block of the FN and LFCN, respectively in the supine position. 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 There is no further information.