 metameric anesthesia or epidural anesthesia) in the "Revista Española de Cirugía" and the "Revista de Sanidad Militar".In the article he explained the technique he had developed in order to be able to inject the anesthetics in the lumbar region, leaving the spinal canal untouched and without the need to reach complete anesthesia.The article explained how Pagés, who had frequently performed spinal anesthesias, developed the idea of injecting the anesthetics through the lumbar space between the 4th and 5th vertebrae, described 43 operations using this technique, provided details on each step and advised on the right dose of anaesthetics (twice as much as was previously recommended in similar techniques).