Spinal anaesthesia for caesarean section after Harrington instrumentation.

A case is presented of a 33-yr-old parturient with Harrington fusion of her spine who received spinal anaesthesia with 15 mg hyperbaric bupivacaine for Caesarean delivery. Multiple attempts of needle insertion in both midline and paramedian at the L3-4 interspace were unsuccessful, whereas the procedure was performed uneventfully at the midline of the L5S1 interspace. The anatomical considerations and difficulties in achieving reliable epidural anaesthesia after Harrington fusion are reviewed. Spinal anaesthesia performed at the L5S1 interspace may provide less technical difficulty and a more reliable result in such patients.