[Clinical aspects of spinal anesthesia administered using 0.5% isobar bupivacaine (Maracine) at the L2/L3 or L4/L5...

The effect of employing different interspaces for lumbar puncture during spinal anaesthesia was evaluated in 40 patients receiving 4 ml of 0.5% plain bupivacaine at level L2/L3 or L4/L5. No differences were observed in onset, spread or duration of analgesia. Furthermore, we found that only 80% of the patients, independently of the interspace used, had a cephalad spread to T8 and conclude that spinal anaesthesia using plain bupivacaine is not ideal for supraumbilical surgery.