General anaesthesia for endoscopic sinus surgery; hypotensive anaesthesia versus isoflurane - local epinephrine

This study included 30 patients, they were randomly classified into two groups. In hypotensive anesthesia [HA] group, anesthesia was maintained by N2O: O2, halothane 0.4-1% and atracurium. Deliberated hypotension was achieved using nitroglycerine infusion [2-5 mug/kg/min.]. In isoflurane-epinephrine [IE] group, halothane was replaced by isoflurane and epinephrine [1: 100,000] injected into the nasal mucosa. HR, MAP, SPO2 and ETpCO2 were recorded in the perioperative period. A surgical field was assessed and an average blood loss was calculated