,DESCRIPTION OF PROCEDURE:,  After satisfactory general endotracheal tube anesthesia was started, the patient was placed on the operating table in supine position with the head held on a horseshoe-shaped headrest and the head was prepped and draped down the routine manner. 
,DESCRIPTION OF PROCEDURE : , After satisfactory general endotracheal tube anesthesia was started , the patient was placed on the operating table in supine position with the head held on a horseshoe - shaped headrest and the head was prepped and draped down the routine manner .