title: Nasal conditioning in perennial allergic rhinitis after nasal allergen challenge.
abstract: BACKGROUND
  Antigen challenge in seasonal allergic rhinitis is considered to be associated with an increased ability of the nose to condition inspired air. In contrast, little is known about air conditioning after antigen challenge in perennial allergic rhinitis (PAR).
  
  
  OBJECTIVE
  The aims of this study were to investigate whether antigen challenge in PAR changes nasal air conditioning and to assess the relationship between nasal conditioning and nasal patency and geometry.
  
  
  METHODS
  Nineteen subjects with PAR were enrolled into this study. Measurement of nasal conditioning, active anterior rhinomanometry (AAR), acoustic rhinometry (AR), and clinical symptom evaluation were performed before and after nasal allergen challenge with allergen extracts from house dust mites.
  
  
  RESULTS
  Ten and 20 min after nasal allergen challenge, the total water content of the air measured in the nasopharynx and the water gradient across the nose were significantly higher in the nasal cavity in which the allergen extract was sprayed. The temperature on both sides of the nose increased non-significantly after nasal allergen challenge. No correlation to data obtained by AAR, AR, and clinical symptom evaluation after nasal allergen challenge was found.
  
  
  CONCLUSIONS
  We suggest that an increase in mucosal humidity due to the allergic provocation might be responsible for the increase in nasal conditioning capacity because no correlation to changes in nasal perimeter and patency was found.
authors.affiliation: Department of Otorhinolaryngology, University of Ulm, Ulm, Germany. ajnirozsasi@hotmail.com
authors.forename: A
authors.initials: A
authors.lastname: Rozsasi
authors.forename: R
authors.initials: R
authors.lastname: Leiacker
authors.forename: T
authors.initials: T
authors.lastname: Keck
mesh_terms: D000222:Adaptation, Physiological; D000328:Adult; D039741:Antigens, Dermatophagoides; D005260:Female; D006801:Humans; D006813:Humidity; D008297:Male; D008875:Middle Aged; D009297:Nasal Mucosa / Q000276:immunology*; D009299:Nasal Provocation Tests; D012221:Rhinitis, Allergic, Perennial / Q000276:immunology*; D025363:Rhinomanometry; D023842:Rhinometry, Acoustic
chemical_list: D039741:Antigens, Dermatophagoides