title: Obstructive site localization using multisensor manometry versus the Friedman staging system in obstructive sleep apnea.
abstract: The aim of this study was to find the correlation between an anatomy-based staging system and pressure manometry performed during sleep. A retrospective study of 45 patients with obstructive sleep apnea (OSA) was carried out. All patients were evaluated by polysomnography, and obstruction sites were localized using a multisensor manometer during the full night. Obstruction sites were classified into retropalatal and retroglossal. The patients were also staged by anatomic findings of tonsil size and palate position. The % retroglossal obstruction was 29.4, 33.5 and 48.6% in stages I, II and III, respectively. There was no significant difference between stages. In contrast, when compared according to the Friedman tongue position (FTP), the mean % retroglossal obstruction of FTP grade 3 was significantly higher than that of FTP grade 1 (P = 0.009) although apnea hypopnea index, body mass index and lowest SpO2 were not different among FTP grades. It seems that FTP correlates with retroglossal obstruction and may be used to select patients in need of retroglossal modification of the airway.
authors.affiliation: Department of Otorhinolaryngology, Seoul National University Bundang Hospital, Seongnam, South Korea.
authors.forename: Chul Hee
authors.initials: CH
authors.lastname: Lee
authors.forename: Tae-Bin
authors.initials: TB
authors.lastname: Won
authors.forename: Wonjae
authors.initials: W
authors.lastname: Cha
authors.forename: In Young
authors.initials: IY
authors.lastname: Yoon
authors.forename: Seockhoon
authors.initials: S
authors.lastname: Chung
authors.forename: Jeong-Whun
authors.initials: JW
authors.lastname: Kim
mesh_terms: D000328:Adult; D000368:Aged; D015992:Body Mass Index; D045422:Continuous Positive Airway Pressure / Q000379:methods; D005260:Female; D006801:Humans; D008297:Male; D019186:Mandibular Advancement / Q000379:methods; D008365:Manometry / Q000295:instrumentation*; D008875:Middle Aged; D017286:Polysomnography; D012119:Respiration; D012189:Retrospective Studies; D012720:Severity of Illness Index; D020181:Sleep Apnea, Obstructive / Q000175:diagnosis* / Q000628:therapy