To compare the extent of bleeding and patient discomfort during packing removal of three different polyvinyl alcohol ( PVA ) packs : 1 ) a standard PVA sponge ( s-PVA ) ( Mondocel Standard 10 cm ; Mondomed NV , Hamont-Achel , Belgium ) ; 2 ) a PVA sponge with oxidized cellulose ( oc-PVA ) ( Merocel Hemox 10 cm ; Medtronic Xomed Surgical Products , Jacksonville , FL ) ; and 3 ) a PVA sponge with polyethylene film ( pf-PVA ) ( Merocel 2000 8 cm ; Medtronic Xomed Surgical Products , Jacksonville , FL ) , after functional endoscopic sinus surgery and inferior turbinoplasty .