title: Association of airway abnormalities and risk factors in 37 subglottic stenosis patients.
abstract: OBJECTIVE
  The study objective is to characterize the airway abnormalities in a series of patients with subglottic stenosis (SGS) as they relate to etiology and risk factors.
  
  
  METHODS
  Retrospective review, academic medical center. Airway characteristics, patient demographics, and suspected risk factors were recorded from a database of SGS cases from 2001 to 2004.
  
  
  RESULTS
  Thirty-seven patients with SGS were identified; 22 of 37 had isolated SGS (59%). Intubation (10 of 37, 27%), high tracheotomy (4 of 37, 11%), and reflux (5 of 37, 14%) comprised the bulk of cases; 13 of 37 (35%) were considered idiopathic. Of 22 patients with isolated SGS, the majority 18 of 22 (P = 0.06) were women, 59% of which were idiopathic. Multiple-level cases (0 of 15) were idiopathic (P < 0.001). Intubation was the most common cause of multiple site stenosis (6 of 15, 40%).
  
  
  CONCLUSIONS
  The majority of patients in this study had isolated lesions. These patients tend to have no apparent risk factors. Multi-level cases are associated with prolonged intubation and known injuries. The nature of "idiopathic" stenoses is discussed.
  
  
  CONCLUSIONS
  Clinical examination of SGS may be meaningful in understanding the etiology of the stenosis.
authors.affiliation: Division of Laryngology and Professional Voice, Department of Otolaryngology and Communication Sciences, Medical College of Wisconsin, 9200 West Wisconsin Avenue, Milwaukee, WI 53226, USA.
authors.forename: David M
authors.initials: DM
authors.lastname: Poetker
authors.forename: Sandra L
authors.initials: SL
authors.lastname: Ettema
authors.forename: Joel H
authors.initials: JH
authors.lastname: Blumin
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Toohill
authors.forename: Albert L
authors.initials: AL
authors.lastname: Merati
mesh_terms: D015331:Cohort Studies; D003371:Cough / Q000175:diagnosis; D004417:Dyspnea / Q000175:diagnosis; D005260:Female; D005764:Gastroesophageal Reflux / Q000150:complications; D005931:Glottis; D006801:Humans; D007442:Intubation, Intratracheal / Q000009:adverse effects; D007828:Laryngoscopy; D007829:Laryngostenosis / Q000175:diagnosis / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D012307:Risk Factors; D012737:Sex Factors; D014135:Tracheal Stenosis / Q000150:complications; D014140:Tracheotomy / Q000009:adverse effects