title: [The utility of peak nasal inspiratory flow rate for clinical practice].
abstract: OBJECTIVE
  To find out whether peak nasal inspiratory flow rate (PnIFR) of one side nose can indicate nasal patency.
  
  
  METHODS
  PnIFR was measured using RHAT-301 wind rate meter (Qinghuatongfang Incorporated Company). One hundred subjects were recruited. We measured PnIFR of every side of nose of all subjects before and after using 3% ephedrine and registered the grade of patients' complaint of nasal obstruction.
  
  
  RESULTS
  PnIFR in normal male and in normal female are different; PnIFR in normal and in patients are different; The grade of patients' complaint of nasal obstruction is correlated with PnIFR; PnIFR in patients before and after using ephedrine are different.
  
  
  CONCLUSIONS
  PnIFR of one side nose can indicate the severity of nasal obstruction; RHAT-301 flow meter is convenient to measure PnIFR for clinical practice, and PnIFR of one side nose can indicate nasal patency; PnIFR of one side nose can indicate the effect of drugs on nasal airway resistance (NAR).
authors.affiliation: Department of Nasopharyngeal Carcinoma, Cancer Center, Sun-Yat-Sen University, Guangzhou 510060.
authors.forename: Ningwei
authors.initials: N
authors.lastname: Li
authors.forename: Xiangmin
authors.initials: X
authors.lastname: Zhang
mesh_terms: D000293:Adolescent; D000328:Adult; D000403:Airway Resistance / Q000187:drug effects; D004809:Ephedrine / Q000494:pharmacology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009296:Nasal Cavity / Q000502:physiology*; D025363:Rhinomanometry / Q000295:instrumentation
chemical_list: D004809:Ephedrine