IRCT20190618043934N2 IRCT 2020-04-30 Birjand University of Medical Sciences Comparison of onset and duration of pain prescribed by combination of bupivacaine with 5% dextrose and fentanyl with bupivacaine Comparison of the effect of interautal administration of bupivacaine and dextrose 5% and fentanyl on bupivacaine alone on the onset and duration of analgesia in patients undergoing lower limb orthopedic surgery 2020-02-20 anticipated 20 Complete https://irct.ir/trial/47025 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: Individuals in each group will be randomly randomized and blocked, including spinal patients with a marcain prescription of 0.5% to cc 2 (10 mg) of group A, and the second group of spinal cord group B with a spinal margin prescription of 5 marcain. %0.5 cc 1 (mg 5) + micg 25 fentanyl (cc 0.5) + cc 0.5 dextrose will be 5% sterile. First, a variety of four blocks are created (AABB, BBAA, ABAB, BABA, ABBA, and BABA). Randomly one of these blocks is selected and patients will be divided into A or B by one of two surgical groups. Then the same is done for other patients, Blinding description: Study participants without knowledge of the drug received for pain relief. Outcome Assessor: The ward nurse questions patients from patients without knowing the type of medication they are taking and registers them in the relevant checklist. 3 Fracture of shaft of tibia. Intervention 1: Intervention group: This group under spinal by prescribing marcain 0.5% 1 cc (5 mg) + 25 micrograms fentanyl (cc 0.5) + 0.5 cc of 5% sterile dextrose. Intervention 2: Control group: this group under spinal by prescribing marcain 0.5% to 2 cc (10 mg). No - There is not a plan to make this available Justification or reason for not sharing IPD is There is no need to publish individual patient information