The effect of deliberate hypercapnia and hypocapnia on intraoperative blood loss and quality of surgical field during functional endoscopic sinus surgery - Nekhendzy, V; Lemmens, H J; Vaughan, W C; Hepworth, E J; Chiu, A G; Church, C A; Brock-Utne, J G (Anesth Analg, 2007)