ABSTRACT
The effects of epinephrine added to 0,5 por cent isobaric bupivacaine for spinal anesthesia were investigated in 96 patients ASA Physical Status I or II, aged 15-87 years old, undergoing surgeries below T12. Patients classified in Group A (n=48) received 15 mg of 0,5 por cent isobaric bupivacaine and patients classified in Group B (n=48) received 0,2 mg of epinephrine added to 15 mg of isobaric bupivacaine. The response to the pinprick stimulation did not show significant differences in times to achieve analgesia in L3-L4 and T12 and no differences were observed in terms of cephalic spread of the anesthesia and incidence of complications. Howerever, significant prolongtion of motor block observed in Group B patients who received epinephrine added to isobaric bupivacaine