Ultrasound-guided Bilateral Suprazygomatic Maxillary Nerve Block and Bimaxillary Osteotomy

"Infiltration performed by the surgeon at the intraoral and intranasal submucosal level in the maxilla (blockage of terminal branches of the maxillary nerve) after intubation and previous to surgical incision.~A total of 50ml of the following preincisional mixture is infiltrated: ½ amp Adrenaline + 1amp Lidocaine 2% in physiological saline (SF) 100ml"

"Bilateral ultrasound-guided maxillary nerve block by suprazygomatic route after intubation and previous to surgical incision performed by the anesthesiologist.~A total of 5ml of Ropivacaine 0.37% infiltrated on each side. Together with adrenaline infiltration performed by the surgeon at the intraoral and intranasal submucosal level in the maxilla.~A total of 50ml of the following preincisional mixture is infiltrated: ½ amp Adrenaline + 110ml SF."