186 Establishment of Reference Values for Differential Cell Counts in Nasal Lavage of Healthy Young Adults.

Background Upper airway inflammation could be reflected by nasal lavage cytology test, which is characterized by advantages of non-invasive, simple, objective and costless. However, reference values nasal lavage cytology was not established. To establish reference values and positive standard for nasal lavage cytology through screening normal healthy subjects and patients with allergic rhinitis according to strict inclusion criteria.