[Sequential analgesia. Technical aspects].

Combined spinal and epidural anaesthesia was described by P. Moulaert. After searching the epidural space, a spinal needle is introduced through the Tuohy needle for performing the intrathecal block; then an epidural catheter is put for the postoperative analgesia. The author from his own experience of this regional anaesthesia proposes modifications of the Tuohy and spinal needles to improve the technique.