 Once the anesthesia was established, an insulated 10-cm, 22-gauge needle with a 5-mm non-insulated stimulating tip was placed in contact with the waists of the articular pillars at the affected levels that were previously mentioned. 
Once the anesthesia was established , an insulated 10 - cm , 22 - gauge needle with a 5 - mm non - insulated stimulating tip was placed in contact with the waists of the articular pillars at the affected levels that were previously mentioned .