Group H received 10 mg of 0.5 % hyperbaric bupivacaine plus fentanyl 10 g , Group B received 11 mg of 0.5 % bupivacaine plus fentanyl 10 g , and Group L received 11 mg of 0.5 % levobupivacaine plus fentanyl 10 g. Spinal anesthesia ( SA ) was undertaken in right lateral position and spinal solutions were injected approximately 30 to 40 seconds .