4. Continuous infusion was then started using an elastomeric pump with 250 mL of 0.9% SS + 50 mL of 0.75% levobupivacaine; the pump offered the possibility of using three different fixed infusions -3,4 and 6 mL/h.
4. Luego se inició una infusión continua con bomba elastomérica con 250 ml de SS 0,9% +50ml de levobupivacaína al 0,75%.