Hyperbaric 0.5% Bupivacain used in subarachnoid block which spread of anesthesia to cephalic at the different site of injection specially L 2-3, L 3-4, L 4-5 inter vertebral space. (2018). TAJ: Journal of Teachers Association, 28(1), 1-5. https://doi.org/10.3329/taj.v28i1.39039